AD8671ARM-R2全新原装原理图各脚功能电路原理芯片引脚定义-中国IC网-芯三七

Precision, Very Low Noise, Low Input

Bias Current Operational Amplifiers

AD8671/AD8672/AD8674

FEATURES

PIN CONFIGURATIONS

Very low noise: 2.8 nV/√Hz, 77 nV p-p

Wide bandwidth: 10 MHz

NC

–IN

+IN

V–

1

2

3

4

8

7

6

5

NC

V+

NC

–IN

+IN

V–

1

2

3

4

8

7

6

5

NC

V+

AD8671

TOP VIEW

Low input bias current: 12 nA max

Low offset voltage: 75 μV max

High open-loop gain: 120 dB min

Low supply current: 3 mA per amplifier

Dual-supply operation: 5 V to 15 V

Unity-gain stable

OUT

NC

OUT

NC

(Not to Scale)

NC = NO CONNECT

Figure 1. 8-Lead SOIC_N (R-8)

Figure 2. 8-Lead MSOP (RM-8)

No phase reversal

OUT A

–IN A

+IN A

V–

1

2

3

4

8

7

6

5

V+

OUT A

–IN A

+IN A

V–

1

2

3

4

8

7

6

5

V+

AD8672

OUT B

–IN B

+IN B

OUT B

–IN B

+IN B

TOP VIEW

APPLICATIONS

PLL filters

(Not to Scale)

Filters for GPS

Figure 3. 8-Lead SOIC-N (R-8)

Figure 4. 8-Lead MSOP (RM-8)

Instrumentation

Sensors and controls

Professional quality audio

OUT A

–IN A

+IN A

V+

1

2

3

4

5

6

7

14 OUT D

13 –IN D

12 +IN D

11 V–

OUT A

–IN A

+IN A

V+

1

2

3

4

5

6

7

14 OUT D

13 –IN D

12 +IN D

11 V–

AD8674

TOP VIEW

AD8674

GENERAL DESCRIPTION

TOP VIEW

(Not to Scale)

The AD8671/AD8672/AD8674 are very high precision amplifiers

featuring very low noise, very low offset voltage and drift, low

input bias current, 10 MHz bandwidth, and low power

+IN B

–IN B

OUT B

10 +IN C

+IN B

–IN B

OUT B

10 +IN C

9

8

–IN C

9

8

–IN C

OUT C

consumption. Outputs are stable with capacitive loads of over

Figure 5. 14-Lead SOIC_N (R-14)

Figure 6. 14-Lead TSSOP (RU-14)

1000 pF. Supply current is less than 3 mA per amplifier at 30 V.

The AD8671/AD8672/AD8674’s combination of ultralow noise,

high precision, speed, and stability is unmatched. The MSOP

version of the AD8671/AD8672 requires only half the board

space of comparable amplifiers.

Applications for these amplifiers include high quality PLL

filters, precision filters, medical and analytical instrumentation,

precision power supply controls, ATE, data acquisition, and

precision controls as well as professional quality audio.

The AD8671/AD8672/AD8674 are specified over the extended

industrial temperature range (–40°C to +125°C).

The AD8671/AD8672 are available in the 8-lead SOIC and

8-lead MSOP packages. The AD8674 is available in 14-lead

SOIC and 14-lead TSSOP packages.

Surface-mount devices in MSOP packages are available in tape

and reel only.

Rev. C

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

AD8671/AD8672/AD8674

TABLE OF CONTENTS

Specifications..................................................................................... 3

Total Noise vs. Source Resistance............................................. 11

Total Harmonic Distortion (THD) and Noise ....................... 12

Driving Capacitive Loads.......................................................... 12

GPS Receiver............................................................................... 13

Band-Pass Filter.......................................................................... 13

PLL Synthesizers and Loop Filters........................................... 13

Outline Dimensions....................................................................... 14

Ordering Guide .......................................................................... 16

Electrical Characteristics, 5.0 V............................................... 3

Electrical Characteristics, 15 V................................................ 4

Absolute Maximum Ratings............................................................ 5

ESD CAUTION ............................................................................ 5

Typical Performance Characteristics ............................................. 6

Applications..................................................................................... 11

Unity-Gain Follower Applications ........................................... 11

Output Phase Reversal............................................................... 11

REVISION HISTORY

6/05—Rev. B to Rev. C

Changes to Figure 6...................................................................... 1

Updated Outline Dimensions................................................... 14

Changes to Ordering Guide ...................................................... 16

4/04—Rev. A to Rev. B

Changes to Figure 32.................................................................. 11

Changes to Figures 36, 37, and 38 ............................................ 12

1/04—Rev. 0 to Rev. A

Added AD8672 and AD8674 parts ..............................Universal

Changes to Specifications............................................................ 3

Deleted Figure 3............................................................................ 6

Changes to Figures 7, 8, and 9 .................................................... 6

Changes to Figure 37.................................................................. 12

Added new Figure 32 ................................................................. 10

Rev. C | Page 2 of 16

AD8671/AD8672/AD8674

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS, 5.0 V

V_S= 5.0 V, V_CM= 0 V, T_A= 25°C, unless otherwise noted.

Table 1.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

INPUT CHARACTERISTICS

Offset Voltage

V_OS

20

30

75

125

μV

–40°C < T_A< +125°C

Offset Voltage Drift

AD8671

AD8672/AD8674

Input Bias Current

∆V_OS/∆T

0.3

+3

+5

+8

+6

+8

0.5

0.8

μV/°C

nA

V

dB

V/mV

pF

GΩ

MΩ

I_B

–12

–20

–40

–12

–20

–40

–2.5

100

1000

+12

+20

+40

+12

+20

+40

+2.5

+25°C < T_A< +125°C

–40°C < T_A< +125°C

Input Offset Current

I_OS

+25°C < T_A< +125°C

–40°C < T_A< +125°C

Input Voltage Range

Common-Mode Rejection Ratio

Large Signal Voltage Gain

Input Capacitance, Common Mode

Input Capacitance, Differential Mode

Input Resistance, Common Mode

Input Resistance, Differential Mode

OUTPUT CHARACTERISTICS

Output Voltage High

Output Voltage Low

Output Voltage High

Output Voltage Low

Output Current

CMRR

A_VO

C_INCM

C_INDM

R_IN

V_CM= –2.5 V to +2.5 V

R_L= 2 kΩ, V_O= –3 V to +3 V

120

6000

6.25

7.5

3.5

15

R_INDM

V_OH

V_OL

V_OH

V_OL

I_OUT

R_L= 2 kΩ, –40°C to +125°C

R_L= 600 Ω

+3.8

+3.7

+4.0

–3.9

+3.9

–3.8

10

V

–3.8

–3.7

R_L= 600 Ω

mA

POWER SUPPLY

Power Supply Rejection Ratio

AD8671/AD8672

AD8674

PSRR

I_SY

V_S= 4 V to 18 V

110

106

130

115

3

dB

mA

Supply Current/Amplifier

V_O= 0 V

–40°C < T_A< +125°C

3.5

4.2

DYNAMIC PERFORMANCE

Slew Rate

Settling Time

SR

t_S

R_L= 2 kΩ

To 0.1% (4 V step, G = 1)

To 0.01% (4 V step, G = 1)

4

V/μs

μs

1.4

5.1

10

Gain Bandwidth Product

NOISE PERFORMANCE

Peak-to-Peak Noise

Voltage Noise Density

Current Noise Density

Channel Separation

AD8672/AD8674

GBP

MHz

e_{n p-p}

e_n

i_n

0.1 Hz to 10 Hz

f = 1 kHz

77

2.8

0.3

100

3.8

nV p-p

nV/√Hz

pA/√Hz

C_S

f = 1 kHz

f = 10 kHz

–130

–105

dB

Rev. C | Page 3 of 16

AD8671/AD8672/AD8674

ELECTRICAL CHARACTERISTICS, 15 V

V_S= 15 V, V_CM= 0 V, T_A= 25°C, unless otherwise noted.

Table 2.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

INPUT CHARACTERISTICS

Offset Voltage

V_OS

20

30

75

125

μV

–40°C < T_A< +125°C

Offset Voltage Drift

AD8671

AD8672/AD8674

Input Bias Current

∆V_OS/∆T

0.3

+3

+5

+8

+6

+8

0.5

0.8

μV/°C

nA

V

dB

V/mV

pF

GΩ

MΩ

I_B

–12

–20

–40

–12

–20

–40

–12

100

1000

+12

+20

+40

+12

+20

+40

+12

+25°C < T_A< +125°C

–40°C < T_A< +125°C

Input Offset Current

I_OS

+25°C < T_A< +125°C

–40°C < T_A< +125°C

Input Voltage Range

Common-Mode Rejection Ratio

Large Signal Voltage Gain

Input Capacitance, Common Mode

Input Capacitance, Differential Mode

Input Resistance, Common Mode

Input Resistance, Differential Mode

OUTPUT CHARACTERISTICS

Output Voltage High

Output Voltage Low

Output Voltage High

Output Voltage Low

Output Current

CMRR

A_VO

C_INCM

C_INDM

R_IN

V_CM= –12 V to +12 V

R_L= 2 kΩ, V_O= –10 V to +10 V

120

6000

6.25

7.5

3.5

15

R_INDM

V_OH

V_OL

V_OH

V_OL

I_OUT

I_SC

R_L= 2 kΩ, –40°C to +125°C

R_L= 600 Ω

+13.2

+11

+13.8

–13.8

+12.3

–12.4

20

V

mA

–13.2

–11

R_L= 600 Ω

Short Circuit Current

30

POWER SUPPLY

Power Supply Rejection Ratio

AD8671/AD8672

AD8674

PSRR

I_SY

V_S= 4 V to 18 V

110

106

130

115

3

dB

mA

Supply Current/Amplifier

V_O= 0 V

–40°C <T_A< +125°C

3.5

4.2

DYNAMIC PERFORMANCE

Slew Rate

Settling Time

SR

t_S

R_L= 2 kΩ

To 0.1% (10 V step, G = 1)

To 0.01% (10 V step, G = 1)

4

V/μs

μs

2.2

6.3

10

Gain Bandwidth Product

NOISE PERFORMANCE

Peak-to-Peak Noise

Voltage Noise Density

Current Noise Density

Channel Separation

AD8672/AD8674

GBP

MHz

e_{n p-p}

e_n

i_n

0.1 Hz to 10 Hz

f = 1 kHz

77

2.8

0.3

100

3.8

nV p-p

nV/√Hz

pA/√Hz

C_S

f = 1 kHz

f = 10 kHz

–130

–105

dB

Rev. C | Page 4 of 16

AD8671/AD8672/AD8674

ABSOLUTE MAXIMUM RATINGS

Table 3.¹

Stresses above those listed under Absolute Maximum Ratings

may cause permanent damage to the device. This is a stress

rating only; functional operation of the device at these or any

other conditions above those indicated in the operational

section of this specification is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect

device reliability.

Parameter

Rating

Supply Voltage

36 V

Input Voltage

V_S– to V_S+

0.7 V

Indefinite

Differential Input Voltage

Output Short-Circuit Duration

Storage Temperature Range

All Packages

Operating Temperature Range

All Packages

–65°C to +150°C

–40°C to +125°C

Table 4. Package Characteristics

1

Package Type

θ_JA

θ_JC

44

43

36

35

Unit

°C/W

8-Lead MSOP (RM)

8-Lead SOIC_N (R)

14-Lead SOIC_N (R)

190

158

120

Junction Temperature Range

All Packages

Lead Temperature Range (Soldering, 60 sec)

–65°C to +150°C

300°C

14-Lead TSSOP (RU) 180

¹Absolute maximum ratings apply at 25°C, unless otherwise noted.

¹θ_JAis specified for the worst-case conditions, that is., θ_JAis specified for the

device soldered in circuit board for surface-mount packages.

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on

the human body and test equipment and can discharge without detection. Although this product features

proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy

electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance

degradation or loss of functionality.

Rev. C | Page 5 of 16

AD8671/AD8672/AD8674

TYPICAL PERFORMANCE CHARACTERISTICS

45

40

35

30

25

20

15

10

5

32

V

T

= ±5V

= 25°C

S

A

V

= ±15V

S

28

24

20

16

12

8

4

0

–35–30–25–20–15–10 –5

0

5

10 15 20 25 30 35 40 45

0

10

20

30

40

50

60

70

80

90

100

V

(μV)

FREQUENCY (Hz)

OS

Figure 7. Voltage Noise Density vs. Frequency

Figure 10. Input Offset Voltage Distribution

31.5

27.0

22.5

18.0

13.5

9.0

35

30

25

20

15

10

5

V

T

= ±15V

= 25°C

V

= ±15V

S

A

S

4.5

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

–35–30–25–20–15–10 –5

0

5

10 15 20 25 30 35 40 45 50

V

(μV)

FREQUENCY (kHz)

OS

Figure 11. Input Offset Voltage Distribution

Figure 8. Voltage Noise Density vs. Frequency

16

17.5

15.0

12.5

10.0

7.5

V

= ±15V

S

15

14

13

12

11

10

9

V

= ±5V

S

5.0

8

V

= ±15V

S

2.5

7

6

–40

0

25

85

125

0

1

2

3

4

5

6

7

8

9

10

FREQUENCY (kHz)

TEMPERATURE (°C)

Figure 12. Input Offset Voltage vs. Temperature

Figure 9. Voltage Noise Density vs. Frequency

Rev. C | Page 6 of 16

AD8671/AD8672/AD8674

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

14.5

14.0

13.5

13.0

12.5

12.0

11.5

11.0

10.5

10.0

V

= ±5V

V

= ±15V

S

R

= 2kΩ

S

L

+I

B

R

= 600Ω

L

–I

B

–40

25

85

125

–40

25

85

125

TEMPERATURE (°C)

Figure 13. Input Bias Current vs. Temperature

Figure 16. Output Voltage High vs. Temperature

2.5

2.0

1.5

1.0

0.5

0

–11.0

–11.5

–12.0

–12.5

–13.0

–13.5

–14.0

–14.5

V

= ±15V

S

V

= ±15V

S

–I

B

R

= 600Ω

L

+I

B

R

= 2kΩ

L

–0.5

–1.0

–40

25

85

125

–40

25

85

125

TEMPERATURE (°C)

Figure 14. Input Bias Current vs. Temperature

Figure 17. Output Voltage Low vs. Temperature

60

4.0

3.8

3.6

3.4

3.2

3.0

2.8

2.6

2.4

270

225

180

135

90

V

R

C

Φ

= ±15V

= 10kΩ

= 20pF

= 59°

SY

50

L

GAIN

40

30

M

20

PHASE

45

10

0

–45

–90

–135

–180

V

= ±15V

–10

–20

–30

–40

S

V

= ±5V

S

10M

–40

25

85

125

100k

1M

FREQUENCY (Hz)

TEMPERATURE (°C)

Figure 15. Supply Current vs. Temperature

Figure 18. Open-Loop Gain and Phase Shift vs. Frequency

Rev. C | Page 7 of 16

AD8671/AD8672/AD8674

30000

V

R

= ±15V

= 4V

= 2kΩ

SY

IN

±5V

L

25000

20000

15000

±15V

10000

5000

0

TIME (100μs/DIV)

–40

25

85

125

TEMPERATURE (°C)

Figure 19. Open-Loop Gain vs. Temperature

Figure 22. Large Signal Transient Response

50

40

V

R

C

= ±15V

= 10mV

= ∞

V

R

= ±15V

= 200mV p-p

= 2kΩ

SY

IN

SY

A

= 100

= 10

= 1

V

IN

L

= 20pF

30

A

V

20

10

A

V

0

–10

–20

–30

–40

–50

1k

10k

100k

1M

10M

100M

TIME (10μs/DIV)

FREQUENCY (Hz)

Figure 20. Closed-Loop Gain vs. Frequency

Figure 23. Small Signal Transient Response

100

90

80

70

60

50

40

30

20

10

0

60

50

40

30

20

10

0

V

= ±15

S

–OS

A

= 10

VO

A

= 100

VO

A

= 1

VO

+OS

100

1k

10k

100k

1M

10M

100M

1k

CAPACITANCE (pF)

10k

100

FREQUENCY (Hz)

Figure 21. Output Impedance vs. Frequency

Figure 24. Small Signal Overshoot vs. Load Capacitance

Rev. C | Page 8 of 16

AD8671/AD8672/AD8674

160

140

120

100

80

V

= ±15V

V

A

= ±15V

= 200mV p-p

= –100

SY

S

IN

V

L

R

= 10kΩ

0V

V

IN

60

–PSRR

40

+PSRR

V

OUT

20

0

0V

–20

–40

10

TIME (4μs/DIV)

1k

10k

100k

1M

10M

100

FREQUENCY (Hz)

Figure 25. Positive Overdrive Recovery

Figure 28. PSRR vs. Frequency

135

V

= ±2.5V TO ±18V

V

A

R

= ±15V

= 200mV p-p

= –100

S

SY

IN

134

133

132

131

130

129

128

127

V

L

= 10kΩ

V

IN

0V

V

OUT

TIME (4μs/DIV)

–40

25

85

125

TEMPERATURE (°C)

Figure 26. Negative Overdrive Recovery

Figure 29. PSRR vs. Temperature

160

140

120

100

80

V

= ±15V

SY

V

=

±15V

S

60

40

20

0

–20

–40

10

TIME (1μs/DIV)

1k

10k

100k

1M

10M

100M

100

FREQUENCY (Hz)

Figure 30. 0.1 Hz to 10 Hz Input Voltage Noise

Figure 27. CMRR vs. Frequency

Rev. C | Page 9 of 16

AD8671/AD8672/AD8674

0

V

= ±15V, ±5V

S

–20

–40

–60

–80

–100

–120

–140

100

1k

10k

100k

1M

10M

100M

FREQUENCY (Hz)

Figure 31. Channel Separation

Rev. C | Page 10 of 16

AD8671/AD8672/AD8674

APPLICATIONS

UNITY-GAIN FOLLOWER APPLICATIONS

V

= ±15V

SY

When large transient pulses (>1 V) are applied at the positive

terminal of amplifiers (such as the OP27, LT1007, OPA227, and

AD8671) with back-to-back diodes at the input stage, the use of

a resistor in the feedback loop is recommended to avoid having

the amplifier load the signal generator. The feedback resistor,

R_F, should be at least 500 Ω. However, if large values must be

used for R_F, a small capacitor, C_F, should be inserted in parallel

with R_Fto compensate for the pole introduced by the input

capacitance and R_F.

V

IN

V

OUT

Figure 32 shows the uncompensated output response with a

10 kΩ resistor in the feedback and the compensated response

with C_F= 15 pF.

TIME (10μs/DIV)

Figure 33. Output Phase Reversal

OUTPUT UNCOMPENSATED

TOTAL NOISE VS. SOURCE RESISTANCE

OUTPUT

COMPENSATED

The low input voltage noise of the AD8671/AD8672/AD8674

makes them a great choice for applications with low source

resistance. However, because they have low input current noise,

they can also be used in circuits with substantial source

resistance.

REF1 +OVER

23.23%

CH2 +OVER

7.885%

Figure 34 shows the voltage noise, current noise, thermal noise,

and total rms noise of the AD8671 as a function of the source

resistance.

For R_S< 475 Ω, the input voltage noise, e_n, dominates.

For 475 Ω < R_S< 412 kΩ, thermal noise dominates.

For R_S> 412 kΩ, the input current noise dominates.

TIME (100ns/DIV)

Figure 32. Transient Output Response

1000

OUTPUT PHASE REVERSAL

Phase reversal is a change of polarity in the amplifier transfer

function that occurs when the input voltage exceeds the supply

voltage. The AD8671/AD8672/AD8674 do not exhibit phase

reversal even when the input voltage is 1 V beyond the supplies.

C

100

i

n

10

e

1/2

(4kR T)

n_t

S

e

n

B

A

1

100

1k

10k

10

100k

1M

SOURCE RESISTANCE (Ω)

Figure 34. Noise vs. Source Resistance

Rev. C | Page 11 of 16

AD8671/AD8672/AD8674

TOTAL HARMONIC DISTORTION (THD) AND NOISE

V

R

C

= ±15V

= 2kΩ

SY

The AD8671/AD8672/AD8674 exhibit low total harmonic

distortion (THD) over the entire audio frequency range. This

makes them suitable for applications with high closed-loop

gains, including audio applications. Figure 35 shows

approximately 0.0006% of THD + N in a positive unity gain, the

worst-case configuration for distortion.

L

= 1nF

L

V

= 100mV

= +1

IN

A

V

CH2 +OVER

39.80%

CH2 –OVER

39.80%

0.1000

V

R

= ±5V

S

0.0500

= 2.5V

= 600Ω

IN

L

0.0200

0.0100

0.0050

TIME (10μs/DIV)

Figure 36. AD8671 Capacitive Load Drive

R

F

0.0020

0.0010

LT1007

500Ω

V

CC

C

R

F

G

0.0005

AD8671

500Ω

220pF

0.0002

0.0001

R

S

10Ω

C

1nF

L

20

50

100 200

500 1k

Hz

2k

10k 20k

5k

R

L

2kΩ

V

IN

V

EE

Figure 35. Total Harmonic Distortion and Noise

Figure 37. Recommended Capacitive Load Circuit

DRIVING CAPACITIVE LOADS

The AD8671/AD8672/AD8674 can drive large capacitive loads

without causing instability. However, when configured in unity

gain, driving very large loads can cause unwanted ringing or

instability.

V

= ±15V

= 2kΩ

SY

R

C

L

= 1nF

= 220pF

= 100mV

= +2

F

V

CH2 +OVER

5.051%

IN

A

V

Figure 36 shows the output of the AD8671 with a capacitive

load of 1 nF. If heavier loads are used in low closed-loop gain or

unity-gain configurations, it is recommended to use external

compensation as shown in the circuit in Figure 37. This

technique reduces the overshoot and prevents the op amp from

oscillation. The trade-off of this circuit is a reduction in output

swing. However, a great added benefit stems from the fact that

the input signal and the op amp’s noise are filtered, and thus the

overall output noise is kept to a minimum.

CH2 –OVER

6.061%

TIME (10μs/DIV)

Figure 38. Compensated Load Drive

The output response of the circuit is shown in Figure 38.

Rev. C | Page 12 of 16

AD8671/AD8672/AD8674

ADC

LOW NOISE OP AMP

MIXER

VGA

DEMODULATOR

AD630

LOW-PASS FILTER

AD8610

BAND-PASS FILTER

AD10200

AD8369

AD8671

AD831

AD8671

CODE GENERATOR

Figure 39. Simplified Block Diagram of a GPS Receiver

The band-pass response is shown in Figure 41.

GPS RECEIVER

GPS receivers require low noise to minimize RF effects. The

precision of the AD8671 makes it an excellent choice for such

applications. Its very low noise and wide bandwidth make it

suitable for band-pass and low-pass filters without the penalty

of high power consumption.

V

= ±15V

S

Figure 39 shows a simplified block diagram of a GPS receiver.

The next section details the design equations.

BAND-PASS FILTER

Filters are useful in many applications; for example, band-pass

filters are used in GPS systems, as discussed in the previous

section. Figure 40 shows a second-order band-pass KRC filter.

100

1k

10k

100k

1M

10M

R3

Hz

2.25kΩ

Figure 41. Band-Pass Response

V

CC

PLL SYNTHESIZERS AND LOOP FILTERS

C2

R1

2.25kΩ

Phase-lock loop filters are used in AM/FM modulation.

1nF

C2

1nF

R2

V

IN

2.25kΩ

R

18kΩ

10kΩ

B

Loop filters in PLL design require accuracy and care in their

implementation. The AD8671/AD8672/AD8674 are ideal

candidates for such filter design; the low offset voltage and low

input bias current minimize the output error. In addition to the

excellent dc specifications, the AD8671/AD8672/AD8674 have

a unique performance at high frequencies; the high open-loop

gain and wide bandwidth allow the user to design a filter with a

high closed-loop gain if desirable. To optimize the filter design,

it is recommended to use small value resistors to minimize the

thermal noise. A simple example is shown in Figure 42.

V

EE

A

Figure 40. Band-Pass KRC Filter

The equal component topology yields a center frequency

2

fo =

C1

R1

2πRC

10kΩ

1nF

V

CC

2

and Q =

4 − K

CHARGE

PUMP

PHASE

DETECTOR

VCO

where:

D

R_B

K =1+

R_A

V

EE

IN

Figure 42. PLL Filter Simplified Block Diagram

Rev. C | Page 13 of 16

AD8671/AD8672/AD8674

OUTLINE DIMENSIONS

5.00 (0.1968)

4.80 (0.1890)

8

1

5

4

6.20 (0.2440)

5.80 (0.2284)

4.00 (0.1574)

3.80 (0.1497)

1.27 (0.0500)

BSC

0.50 (0.0196)

0.25 (0.0099)

× 45°

1.75 (0.0688)

1.35 (0.0532)

0.25 (0.0098)

0.10 (0.0040)

8°

0.51 (0.0201)

0.31 (0.0122)

0° 1.27 (0.0500)

COPLANARITY

0.10

0.25 (0.0098)

0.17 (0.0067)

SEATING

PLANE

0.40 (0.0157)

COMPLIANT TO JEDEC STANDARDS MS-012-AA

CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS

(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR

REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN

Figure 43. 8-Lead Standard Small Outline Package [SOIC_N]

Narrow Body

(R-8)

Dimensions shown in millimeters and (inches)

3.00

BSC

8

1

5

4

4.90

BSC

3.00

BSC

PIN 1

0.65 BSC

1.10 MAX

0.15

0.00

0.80

0.60

0.40

8°

0°

0.38

0.22

0.23

0.08

COPLANARITY

0.10

SEATING

PLANE

COMPLIANT TO JEDEC STANDARDS MO-187-AA

Figure 44. 8-Lead Mini Small Outline Package [MSOP]

(RM-8)

Dimensions shown in millimeters

Rev. C | Page 14 of 16

AD8671/AD8672/AD8674

8.75 (0.3445)

8.55 (0.3366)

14

1

8

7

4.00 (0.1575)

3.80 (0.1496)

6.20 (0.2441)

5.80 (0.2283)

1.27 (0.0500)

BSC

0.50 (0.0197)

0.25 (0.0098)

1.75 (0.0689)

1.35 (0.0531)

× 45°

0.25 (0.0098)

0.10 (0.0039)

8°

0°

0.51 (0.0201)

0.31 (0.0122)

SEATING

PLANE

1.27 (0.0500)

0.40 (0.0157)

COPLANARITY

0.10

0.25 (0.0098)

0.17 (0.0067)

COMPLIANT TO JEDEC STANDARDS MS-012-AB

CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS

(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR

REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN

Figure 45. 14-Lead Standard Small Outline Package [SOIC_N]

Narrow Body

(R-14)

Dimensions shown in millimeters and (inches)

5.10

5.00

4.90

14

8

7

4.50

4.40

4.30

6.40

BSC

1

PIN 1

0.65

BSC

1.05

1.00

0.80

0.20

0.09

1.20

MAX

0.75

0.60

0.45

8°

0°

0.15

0.05

0.30

0.19

SEATING

PLANE

COPLANARITY

0.10

COMPLIANT TO JEDEC STANDARDS MO-153-AB-1

Figure 46. 14-Lead Thin Shrink Small Outline Package [TSSOP]

(RU-14)

Dimensions shown in millimeters

Rev. C | Page 15 of 16

AD8671/AD8672/AD8674

ORDERING GUIDE

Model

AD8671AR

AD8671AR-REEL

AD8671AR-REEL7

AD8671ARZ¹

AD8671ARZ-REEL¹

AD8671ARZ-REEL7¹

AD8671ARM-R2

AD8671ARM-REEL

AD8671ARMZ-R2¹

AD8671ARMZ-REEL¹

AD8672AR

Temperature Range

Package Description

8-Lead SOIC_N

8-Lead MSOP

Package Option

R-8

Branding

–40°C to +125°C

R-8

RM-8

R-8

BGA

A0V

8-Lead MSOP

8-Lead SOIC_N

8-Lead MSOP

AD8672AR-REEL

AD8672AR-REEL7

AD8672ARZ¹

AD8672ARZ-REEL¹

AD8672ARZ-REEL7¹

AD8672ARM-R2

AD8672ARM-REEL

AD8672ARMZ-R2¹

AD8672ARMZ-REEL¹

AD8674AR

AD8674AR-REEL

AD8674AR-REEL7

AD8674ARZ¹

AD8674ARZ-REEL¹

AD8674ARZ-REEL7¹

AD8674ARU

R-8

RM-8

R-14

RU-14

BHA

A0W

14-Lead SOIC_N

14-Lead TSSOP

AD8674ARU-REEL

AD8674ARUZ¹

AD8674ARUZ-REEL¹

¹Z = Pb-free part.

©

registered trademarks are the property of their respective owners.

D03718–0–6/05(C)

Rev. C | Page 16 of 16

型号:	AD8671ARM-R2
是否Rohs认证：	不符合
生命周期：	Obsolete
零件包装代码：	TSSOP
包装说明：	TSSOP, TSSOP8,.19
针数：	8
Reach Compliance Code：	not_compliant
ECCN代码：	EAR99
HTS代码：	8542.33.00.01
风险等级：	8.07
放大器类型：	OPERATIONAL AMPLIFIER
架构：	VOLTAGE-FEEDBACK
最大平均偏置电流 (IIB)：	0.04 µA
25C 时的最大偏置电流 (IIB)：	0.012 µA
标称共模抑制比：	120 dB
频率补偿：	YES
最大输入失调电压：	125 µV
JESD-30 代码：	S-PDSO-G8
JESD-609代码：	e0
长度：	3 mm
低-偏置：	NO
低-失调：	YES
微功率：	NO
湿度敏感等级：	1
负供电电压上限：	-18 V
标称负供电电压 (Vsup)：	-5 V
功能数量：	1
端子数量：	8
最高工作温度：	125 °C
最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP
封装等效代码：	TSSOP8,.19
封装形状：	SQUARE
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
包装方法：	TAPE AND REEL
峰值回流温度（摄氏度）：	240
功率：	NO
电源：	+-5/+-15 V
可编程功率：	NO
认证状态：	Not Qualified
座面最大高度：	1.1 mm
标称压摆率：	4 V/us
子类别：	Operational Amplifiers
最大压摆率：	4.2 mA
供电电压上限：	18 V
标称供电电压 (Vsup)：	5 V
表面贴装：	YES
技术：	BIPOLAR
温度等级：	AUTOMOTIVE
端子面层：	Tin/Lead (Sn85Pb15)
端子形式：	GULL WING
端子节距：	0.65 mm
端子位置：	DUAL
处于峰值回流温度下的最长时间：	30
标称均一增益带宽：	10000 kHz
最小电压增益：	1000000
宽带：	NO
宽度：	3 mm
Base Number Matches：	1

电子百科

产品导航

产品型号AD8671ARM-R2的Datasheet PDF文件预览

AD8671ARM-R2相关产品..

AD8671ARM-R2相关文章

IC37:专业IC行业平台