DAC8532IDGK 参数 Datasheet PDF下载

ELECTRICAL CHARACTERISTICS

(Cont.)

V

DD

= +2.7V to +5.5V. –40°C to +105°C, unless otherwise specified.

DAC8532

PARAMETER

REFERENCE INPUT

Reference Current

Reference Input Range

Reference Input Impedance

LOGIC INPUTS

(2)

Input Current

V

IN

L, Input LOW Voltage

V

IN

L, Input LOW Voltage

V

IN

H, Input HIGH Voltage

V

IN

H, Input HIGH Voltage

Pin Capacitance

POWER REQUIREMENTS

V

DD

I

DD

(normal mode)

V

DD

= +3.6V to +5.5V

V

DD

= +2.7V to +3.6V

I

DD

(all power-down modes)

V

DD

= +3.6V to +5.5V

V

DD

= +2.7V to +3.6V

POWER EFFICIENCY

I

OUT

/I

DD

TEMPERATURE RANGE

Specified Performance

CONDITIONS

V

REF

= V

DD

= +5V

V

REF

= V

DD

= +3V

0

75

±1

0.8

0.6

2.4

2.1

3

2.7

DAC Active and Excluding Load Current

V

IH

= V

DD

and V

IL

= GND

V

IH

= V

DD

and V

IL

= GND

V

IH

= V

DD

and V

IL

= GND

V

IH

= V

DD

and V

IL

= GND

I

LOAD

= 2mA, V

DD

= +5V

–40

500

450

0.2

0.05

89

+105

5.5

800

750

1

1

MIN

TYP

67

40

MAX

90

54

V

DD

UNITS

µA

µA

V

kΩ

µA

V

V

V

V

pF

V

µA

µA

µA

µA

%

°C

V

DD

V

DD

V

DD

V

DD

=

=

=

=

+5V

+3V

+5V

+3V

NOTES: (1) Linearity calculated using a reduced code range of 485 to 64714; output unloaded. (2) Ensured by design and characterization, not production tested.

PIN CONFIGURATION

Top View

MSOP-8

PIN DESCRIPTIONS

PIN

1

2

3

4

5

NAME

V

DD

V

REF

V

OUT

B

V

OUT

A

SYNC

DESCRIPTION

Power supply input, +2.7V to +5.5V.

Reference voltage input.

Analog output voltage from DAC B.

Analog output voltage from DAC A.

Level triggered SYNC input (active LOW). This is the

frame synchronization signal for the input data.

When SYNC goes LOW, it enables the input shift

register and data is transferred on the falling edge of

SCLK. The action specified by the 8-bit control byte

and 16-bit data word is executed following the 24th

falling SCLK clock edge (unless SYNC is taken

HIGH before this edge in which case the rising edge

of SYNC acts as an interrupt and the write sequence

is ignored by the DAC8532).

Serial Clock Input. Data can be transferred at rates

up to 30 MHz at 5V.

Serial Data Input. Data is clocked into the 24-bit

input shift register on each falling edge of the serial

clock input.

Ground reference point for all circuitry on the part.

V

DD

V

REF

V

OUT

B

V

OUT

A

1

2

DAC8532

3

4

8

7

6

5

GND

D

IN

SCLK

SYNC

6

7

SCLK

D

IN

8

GND

DAC8532

SBAS246A

3

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