OPA277UA各脚功能电路原理芯片引脚定义引脚图及功能IC贸易商-中国IC网-芯三七

®

OPA277

OPA2277

OPA4277

OP

A2277

OPA277

OPA4277

O

P

A

P

A

2

27

2

7

O

PA

4277

For most current data sheet and other product

information, visit www.burr-brown.com

High Precision

OPERATIONAL AMPLIFIERS

FEATURES

● ULTRA LOW OFFSET VOLTAGE: 10µV

● ULTRA LOW DRIFT: ±0.1µV/°C

● HIGH OPEN-LOOP GAIN: 134dB

● HIGH COMMON-MODE REJECTION: 140dB

● HIGH POWER SUPPLY REJECTION: 130dB

● LOW BIAS CURRENT: 1nA max

DESCRIPTION

The OPA277 series precision op amps replace the industry

standard OP-177. They offer improved noise, wider output

voltage swing, and are twice as fast with half the quiescent

current. Features include ultra low offset voltage and drift, low

bias current, high common-mode rejection, and high power

supply rejection. Single, dual, and quad versions have identical

specifications for maximum design flexibility.

OPA277 series op amps operate from ±2V to ±18V supplies

with excellent performance. Unlike most op amps which

are specified at only one supply voltage, the OPA277 series

is specified for real-world applications; a single limit ap-

plies over the ±5V to ±15V supply range. High performance

is maintained as the amplifiers swing to their specified limits.

Because the initial offset voltage (±20µV max) is so low, user

adjustment is usually not required. However, the single version

(OPA277) provides external trim pins for special applications.

● WIDE SUPPLY RANGE: ±2V to ±18V

● LOW QUIESCENT CURRENT: 800µA/amp

● SINGLE, DUAL, AND QUAD VERSIONS

● REPLACES OP-07, OP-77, OP-177

APPLICATIONS

● TRANSDUCER AMPLIFIER

● BRIDGE AMPLIFIER

OPA277 op amps are easy to use and free from phase inversion

and overload problems found in some other op amps. They are

stable in unity gain and provide excellent dynamic behavior

over a wide range of load conditions. Dual and quad versions

feature completely independent circuitry for lowest crosstalk

and freedom from interaction, even when overdriven or over-

loaded.

● TEMPERATURE MEASUREMENTS

● STRAIN GAGE AMPLIFIER

● PRECISION INTEGRATOR

● BATTERY POWERED INSTRUMENTS

● TEST EQUIPMENT

Single (OPA277) and dual (OPA2277) versions are available

in 8-pin DIP and SO-8 surface-mount packages. The quad

(OPA4277) comes in 14-pin DIP and SO-14 surface-mount

packages. All are fully specified from –40°C to +85°C and

operate from –55°C to +125°C.

OPA277

Offset Trim

1

2

3

4

8

7

6

5

Offset Trim

V+

–In

+In

V–

OPA4277

Output

NC

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–

OPA2277

A

B

D

C

8-Pin DIP, SO-8

Out A

1

2

3

4

8

7

6

5

V+

A

–In A

+In A

V–

Out B

–In B

+In B

–In B

Out B

10 +In C

B

9

8

–In C

Out C

8-Pin DIP, SO-8

14-Pin DIP, SO-14

IInternational Airport Industrial Park

Twx: 910-952-1111

•

Mailing Address: PO Box 11400, Tucson, AZ 85734

•

Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706

•

Tel: (520) 746-1111

•

Internet: http://www.burr-brown.com/

•

Cable: BBRCORP Telex: 066-6491

•

FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

PDS-1413D

Printed in U.S.A. March, 1999

SPECIFICATIONS: V_S= ±5V to V_S= ±15V

At T_A= +25°C, and R_L= 2kΩ, unless otherwise noted.

Boldface limits apply over the specified temperature range, –40°C to +85°C.

OPA277PA, UA

OPA2277PA, UA

OPA4277PA, UA

OPA277P, U

OPA2277P, U

PARAMETER

CONDITION

MIN

TYP⁽¹⁾

MAX

MIN

TYP⁽¹⁾

MAX

UNITS

OFFSET VOLTAGE

Input Offset Voltage:

V_OS

OPA277P, U (high grade, single)

OPA2277P, U (high grade, dual)

All PA, UA Versions

±10

±20

±25

µV

±20

±50

±100

±1

Input Offset Voltage Over Temperature

OPA277P, U (high grade, single)

OPA2277P, U (high grade, dual)

All PA, UA Versions

T_A= –40°C to +85°C

±30

±50

µV

Input Offset Voltage Drift

OPA277P, U (high grade, single)

OPA2277P, U (high grade, dual)

All PA, UA Versions

dV_OS/dT

T_A= –40°C to +85°C

±0.1

±0.15

±0.25

µV/°C

±0.15

Input Offset Voltage: (all models)

vs Time

vs Power Supply

T_A= –40°C to +85°C

Channel Separation (dual, quad)

0.2

±0.3

✻

µV/mo

µV/V

PSRR

V_S= ±2V to ±18V

dc

±0.5

±1

0.1

✻

INPUT BIAS CURRENT

Input Bias Current

T_A= –40°C to +85°C

Input Offset Current

T_A= –40°C to +85°C

I_B

±0.5

±1

±2

±1

±2

✻

±2.8

±4

±2.8

nA

I_OS

±4

NOISE

Input Voltage Noise, f = 0.1 to 10Hz

0.22

0.035

12

8

✻

µVp-p

µVrms

Input Voltage Noise Density, f = 10Hz e_n

nV/√Hz

pA/√Hz

f = 100Hz

f = 1kHz

f = 10kHz

8

0.2

Current Noise Density, f = 1kHz

i_n

INPUT VOLTAGE RANGE

Common-Mode Voltage Range

Common-Mode Rejection

T_A= –40°C to +85°C

V_CM

CMRR

(V–) +2

130

128

(V+) –2

✻

115

✻

V

dB

V_CM= (V–) +2V to (V+) –2V

140

✻

INPUT IMPEDANCE

Differential

Common-Mode

100 || 3

250 || 3

✻

MΩ || pF

GΩ || pF

V_CM= (V–) +2V to (V+) –2V

OPEN-LOOP GAIN

Open-Loop Voltage Gain

A_OLV_O= (V–)+0.5V to (V+)–1.2V, R_L= 10kΩ

V_O= (V–)+0.5V to (V+)–1.5V, R_L= 2kΩ

140

134

✻

dB

126

✻

T_A= –40°C to +85°C

FREQUENCY RESPONSE

Gain-Bandwidth Product

Slew Rate

Settling Time, 0.1%

0.01%

GBW

SR

1

0.8

14

16

3

✻

MHz

V/µs

µs

V_S= ±15V, G = 1, 10V Step

V_IN• G = V_S

Overload Recovery Time

Total Harmonic Distortion + Noise THD+N

1kHz, G = 1, V_O= 3.5Vrms

0.002

%

OUTPUT

Voltage Output

T_A= –40°C to +85°C

V_O

R_L= 10kΩ

R_L= 2kΩ

(V–) +0.5

(V–) +1.5

(V+) –1.2

(V+) –1.5

✻

V

mA

T_A= –40°C to +85°C

Short-Circuit Current

Capacitive Load Drive

I_SC

C_LOAD

±35

✻

See Typical Curve

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes

no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change

without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant

any BURR-BROWN product for use in life support devices and/or systems.

®

2

OPA277, 2277, 4277

SPECIFICATIONS: V_S= ±5V to V_S= ±15V (CONT)

At T_A= +25°C, and R_L= 2kΩ, unless otherwise noted.

Boldface limits apply over the specified temperature range, –40°C to +85°C.

OPA277PA, UA

OPA2277PA, UA

OPA4277PA, UA

OPA277P, U

OPA2277P, U

PARAMETER

CONDITION

MIN

TYP⁽¹⁾

MAX

MIN

TYP⁽¹⁾

MAX

UNITS

POWER SUPPLY

Specified Voltage Range

Operating Voltage Range

Quiescent Current (per amplifier)

T_A= –40°C to +85°C

V_S

I_Q

±5

±2

±15

±18

±825

±900

✻

V

µA

I_O= 0

±790

✻

TEMPERATURE RANGE

Specified Range

Operating Range

Storage Range

–40

–55

85

125

✻

°C

Thermal Resistance

SO-8 Surface-Mount

8-Pin DIP

14-Pin DIP

SO-14 Surface-Mount

θ_JA

150

100

80

✻

°C/W

100

✻ Specifications same as OPA277P, U.

NOTE: (1) V_S= ±15V.

ABSOLUTE MAXIMUM RATINGS⁽¹⁾

ELECTROSTATIC

DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brown

recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling

and installation procedures can cause damage.

Supply Voltage .................................................................................... 36V

Input Voltage .....................................................(V–) –0.7V to (V+) +0.7V

Output Short-Circuit⁽²⁾.............................................................. Continuous

Operating Temperature .................................................. –55°C to +125°C

Storage Temperature .....................................................–55°C to +125°C

Junction Temperature ...................................................................... 150°C

Lead Temperature (soldering, 10s)................................................. 300°C

NOTE: (1) Stresses above these rating may cause permanent damage.

Exposure to absolute maximum conditions for extended periods may degrade

device reliability. (2) Short-circuit to ground, one amplifier per package.

ESD damage can range from subtle performance degrada-

tion to complete device failure. Precision integrated circuits

may be more susceptible to damage because very small

parametric changes could cause the device not to meet its

published specifications.

PACKAGE/ORDERING INFORMATION

OFFSET

VOLTAGE

max, µV

OFFSET

VOLTAGE DRIFT

max, µV/°C

PACKAGE

DRAWING

NUMBER⁽¹⁾

TEMPERATURE

RANGE

ORDERING

NUMBER(2)

TRANSPORT

MEDIA

PRODUCT

PACKAGE

Single

OPA277PA

OPA277P

OPA277UA

"

±50

±20

±50

"

±20

"

±1

±0.15

±1

8-Pin DIP

SO-8 Surface Mount

006

182

"

182

"

–40°C to +85°C

OPA277PA

OPA277P

OPA277UA

OPA277UA/2K5

OPA277U

Rails

"

Tape and Reel

Rails

Tape and Reel

OPA277U

"

±0.15

"

SO-8 Surface Mount

"

–40°C to +85°C

"

OPA277U/2K5

Dual

OPA2277PA

OPA2277P

OPA2277UA

"

OPA2277U

"

±50

±25

±50

"

±25

"

±1

±0.25

±1

8-Pin DIP

SO-8 Surface Mount

006

182

"

182

"

–40°C to +85°C

OPA2277PA

OPA2277P

OPA2277UA

OPA2277UA/2K5

OPA2277U

Rails

"

Tape and Reel

Rails

Tape and Reel

±0.25

"

SO-8 Surface Mount

"

–40°C to +85°C

"

OPA2277U/2K5

Quad

OPA4277PA

OPA4277UA

"

±50

"

±1

"

14-Pin DIP

SO-14 Surface Mount

"

010

235

"

–40°C to +85°C

OPA4277PA

OPA4277UA

OPA4277UA/2K5

Rails

Tape and Reel

"

NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Products followed by a slash

(/) are only available in Tape and Reel in the quantities indicated (e.g. /2K5 indicates 2500 devices per reel). Ordering 2500 pieces of “OPA277UA/2K5” will get

a single 2500 piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book.

®

3

OPA277, 2277, 4277

TYPICAL PERFORMANCE CURVES

At T_A= +25°C, V_S= ±15V, and R_L= 2kΩ, unless otherwise noted.

POWER SUPPLY AND COMMON-MODE

REJECTION vs FREQUENCY

OPEN-LOOP GAIN/PHASE

vs FREQUENCY

140

120

100

80

G

C_L= 0

C_L= 1500pF

120

100

80

0

+PSR

–PSR

–30

–60

–90

–120

–150

–180

φ

60

CMR

60

40

20

0

–20

0

0.1

1

10

100

1k

10k

100k

1M

0.1

1

10

100

1k

10k 100k

1M

10M

Frequency (Hz)

INPUT NOISE AND CURRENT NOISE

SPECTRAL DENSITY vs FREQUENCY

INPUT NOISE VOLTAGE vs TIME

1000

100

10

Noise signal is bandwidth limited to

lie between 0.1Hz and 10Hz.

Current Noise

Voltage Noise

1

10

100

1k

10k

1sec/div

Frequency (Hz)

TOTAL HARMONIC DISTORTION + NOISE

vs FREQUENCY

CHANNEL SEPARATION vs FREQUENCY

1

0.1

140

120

100

80

V_OUT= 3.5Vrms

Dual and quad devices. G = 1,

all channels. Quad measured

channel A to D or B to C—other

combinations yield similar or

improved rejection.

G = 10, R_L= 2kΩ, 10kΩ

G = 1, R_L= 2kΩ, 10kΩ

0.01

0.001

60

40

10

100

1k

10k

100k

10

100

1k

10k

100k

1M

Frequency (Hz)

®

4

OPA277, 2277, 4277

TYPICAL PERFORMANCE CURVES (CONT)

At T_A= +25°C, V_S= ±15V, and R_L= 2kΩ, unless otherwise noted.

OFFSET VOLTAGE DRIFT

OFFSET VOLTAGE PRODUCTION DISTRIBUTION

PRODUCTION DISTRIBUTION

16

14

12

10

8

35

30

25

20

15

10

5

Typical distribution

of packaged units.

Single, dual, and

quad included.

Typical distribution

of packaged units.

Single, dual, and

quad included.

6

4

2

0

–50–45–40–35–30–25–20–15–10 –5

0

5 10 15 20 25 30 35 40 45 50

0

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Offset Voltage (µV/°C)

Offset Voltage (µV)

WARM-UP OFFSET VOLTAGE DRIFT

A_OL, CMR, PSR vs TEMPERATURE

3

160

150

140

130

120

110

100

2

1

CMR

A_OL

0

PSR

–1

–2

–3

0

15

30

45

60

75

90

105

120

–75

–50

–25

0

25

50

75

100

125

Time from Power Supply Turn-On (s)

Temperature (°C)

QUIESCENT CURRENT AND

SHORT-CIRCUIT CURRENT vs TEMPERATURE

INPUT BIAS CURRENT vs TEMPERATURE

5

4

100

1000

950

900

850

800

750

700

650

600

550

500

90

80

70

60

50

40

30

20

10

0

3

2

±I_Q

1

0

–I_SC

+I_SC

–1

–2

–3

–4

–5

Curves represent typical

production units.

–75

–50

–25

0

25

50

75

100

125

–75

–50

–25

0

25

50

75

100

125

Temperature (°C)

®

5

OPA277, 2277, 4277

TYPICAL PERFORMANCE CURVES (CONT)

At T_A= +25°C, V_S= ±15V, and R_L= 2kΩ, unless otherwise noted.

CHANGE IN INPUT BIAS CURRENT

vs POWER SUPPLY VOLTAGE

CHANGE IN INPUT BIAS CURRENT

vs COMMON-MODE VOLTAGE

2.0

1.5

2.0

1.5

Curve shows normalized change in bias current

with respect to V_CM= 0V. Typical I_Bmay range

from –05.nA to +0.5nA at V_CM= 0V.

Curve shows normalized change in

bias current with respect to V_S= ±10V

(+20V). Typical I_Bmay range from

–0.5nA to +0.5nA at V_S= ±10V.

1.0

V_S= ±5V

0.5

0.0

V_CM= 0V

–0.5

–1.0

–1.5

–2.0

–0.5

–1.0

–1.5

–2.0

V_S= ±15V

0

5

10

15

20

25

30

35

40

–15

±1

0

–10

–5

0

5

10

15

Supply Voltage (V)

Common-Mode Voltage (V)

QUIESCENT CURRENT vs SUPPLY VOLTAGE

per amplifier

SETTLING TIME vs CLOSED-LOOP GAIN

1000

900

800

700

600

500

100

50

10V step

C_L= 1500pF

0.01%

0.1%

20

10

0

±5

±10

±15

±20

±10

±100

Supply Voltage (V)

Gain (V/V)

MAXIMUM OUTPUT VOLTAGE

vs FREQUENCY

OUTPUT VOLTAGE SWING vs OUTPUT CURRENT

–55°C

(V+)

(V+) – 1

(V+) – 2

(V+) – 3

(V+) – 4

(V+) – 5

30

25

20

15

10

5

V_S= ±15V

125°C

25°C

(V–) + 5

(V–) + 4

(V–) + 3

(V–) + 2

(V–) + 1

(V–)

125°C

V_S= ±5V

–55°C

0

1k

10k

100k

1M

±5

±10

±15

±20

±25

±30

Frequency (Hz)

Output Current (mA)

®

6

OPA277, 2277, 4277

TYPICAL PERFORMANCE CURVES (CONT)

At T_A= +25°C, V_S= ±15V, and R_L= 2kΩ, unless otherwise noted.

LARGE-SIGNAL STEP RESPONSE

SMALL-SIGNAL OVERSHOOT

G = +1, C_L= 1500pF, V_S= ±15V

vs LOAD CAPACITANCE

60

Gain = –1

50

40

Gain = +1

30

20

Gain = ±10

10

0

10

100

1k

10k

100k

10µs/div

Load Capacitance (pF)

SMALL-SIGNAL STEP RESPONSE

G = +1, C_L= 0, V_S= ±15V

G = +1, C_L= 1500pF, V_S= ±15V

1µs/div

®

7

OPA277, 2277, 4277

connecting a potentiometer as shown in Figure 1. This

adjustment should be used only to null the offset of the op

amp. This adjustment should not be used to compensate for

offsets created elsewhere in a system since this can intro-

duce additional temperature drift.

APPLICATIONS INFORMATION

The OPA277 series is unity-gain stable and free from unex-

pected output phase reversal, making it easy to use in a wide

range of applications. Applications with noisy or high im-

pedance power supplies may require decoupling capacitors

close to the device pins. In most cases 0.1µF capacitors are

adequate.

V+

Trim Range: Exceeds

Offset Voltage Specification

0.1µF

The OPA277 series has very low offset voltage and drift. To

achieve highest performance, circuit layout and mechanical

conditions should be optimized. Offset voltage and drift can

be degraded by small thermoelectric potentials at the op amp

inputs. Connections of dissimilar metals will generate ther-

mal potential which can degrade the ultimate performance of

the OPA277 series. These thermal potentials can be made to

cancel by assuring that they are equal in both input termi-

nals.

20kΩ

7

1

2

8

OPA277

6

3

OPA277 single op amp only.

Use offset adjust pins only to null

4

0.1µF

offset voltage of op amp—see text.

V–

• Keep thermal mass of the connections made to the two

input terminals similar.

FIGURE 1. OPA277 Offset Voltage Trim Circuit.

• Locate heat sources as far as possible from the critical

input circuitry.

INPUT PROTECTION

The inputs of the OPA277 series are protected with 1kΩ

series input resistors and diode clamps. The inputs can

withstand ±30V differential inputs without damage. The

protection diodes will, of course, conduct current when the

inputs are over-driven. This may disturb the slewing behav-

ior of unity-gain follower applications, but will not damage

the op amp.

• Shield op amp and input circuitry from air currents such as

cooling fans.

OPERATING VOLTAGE

OPA277 series op amp operate from ±2V to ±18V supplies

with excellent performance. Unlike most op amps which are

specified at only one supply voltage, the OPA277 series is

specified for real-world applications; a single limit applies

over the ±5V to ±15V supply range. This allows a customer

operating at V_S= ±10V to have the same assured perfor-

mance as a customer using ±15V supplies. In addition, key

parameters are guaranteed over the specified temperature

range, –40°C to +85°C. Most behavior remains unchanged

through the full operating voltage range (±2V to ±18V).

Parameters which vary significantly with operating voltage

or temperature are shown in typical performance curves.

INPUT BIAS CURRENT CANCELLATION

The input stage base current of the OPA277 series is inter-

nally compensated with an equal and opposite cancellation

circuit. The resulting input bias current is the difference

between the input stage base current and the cancellation

current. This residual input bias current can be positive or

negative.

When the bias current is canceled in this manner, the input

bias current and input offset current are approximately the

same magnitude. As a result, it is not necessary to use a bias

current cancellation resistor as is often done with other op

amps (Figure 2). A resistor added to cancel input bias

current errors may actually increase offset voltage and noise.

OFFSET VOLTAGE ADJUSTMENT

The OPA277 series is laser-trimmed for very low offset

voltage and drift so most circuits will not require external

adjustment. However, offset voltage trim connections are

provided on pins 1 and 8. Offset voltage can be adjusted by

R₂

R₁

Op Amp

OPA277

R_B= R₂|| R₁

No bias current

cancellation resistor

(see text)

(a)

(b)

Conventional op amp with external bias

current cancellation resistor.

OPA277 with no external bias current

cancellation resistor.

FIGURE 2. Input Bias Current Cancellation.

®

8

OPA277, 2277, 4277

V+

1/2

R₂

R₁

V_OUT= (V₁– V₂)(1 +

)

OPA2277

R₂

V–

V+

R–∆R

R+∆R

V₂

R₁

Load

Cell

V₁

1/2

R–∆R

OPA2277

V–

R₁

R₂

For integrated solution see: INA126, INA2126 (dual)

INA125 (on-board reference)

INA122 (single-supply)

FIGURE 3. Load Cell Amplifier.

I_REG1mA

5V

12

1

V+

V_LIN

V_I⁺_N

14

I_R1

1/2

13

11

V_REG

I_R2

10

V+

OPA2277

Type J

R_F

10kΩ

4

R_G

1250Ω

9

8

B

E

R

412Ω

XTR105

R_F

10kΩ

3

R_G

V_I^–_N

I_O

1/2

OPA2277

2

7

1kΩ

25Ω

I_RET

I_O= 4mA + (V_I⁺_N– V_I^–_N

)

40

R_G

V–

6

50Ω

R_CM= 1250Ω

2R_F

R

(G = 1 +

= 50)

0.01µF

FIGURE 4. Thermocouple Low Offset, Low Drift Loop Measurement with Diode Cold Junction Compensation.

®

9

OPA277, 2277, 4277

电子百科

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