Complete, Dual, 12-Bit

Multiplying DACs

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5

A

AGNDA

TIMEBASE = 2

µs/div

SMALL-SIGNAL PULSE RESPONSE

A

AGNDA

TIMEBASE = 2

µs/div

LARGE-SIGNAL PULSE RESPONSE

______________________________________________________________Pin Description

PIN

MX7837

MX7847

NAME

FUNCTION

1

–

CS

Chip Select – active-low logic input

–

1

CSA

Chip-Select Input for DAC A – active-low logic input

2

Amplifier Feedback Resistor for DAC A

–

2

CSB

Chip-Select Input for DAC B – active-low logic input

3

3

Reference Input Voltage for DAC A

4

4

Analog Output Voltage from DAC A

5

5

AGNDA

Analog Ground for DAC A

6

6

Positive Power Supply

–

7

7

Negative Power Supply

8

8

AGNDB

Analog Ground for DAC B

9

9

Analog Output Voltage from DAC B

10

10

Reference Input Voltage for DAC B

11

11

DGND

Digital Ground

12

–

Amplifier Feedback Resistor for DAC B

–

12

DB11

Data Bit 11 (MSB)

13

13

WR

Write Input – active-low logic input (MX7837); positive-edge-triggered input used with

CSA and CSB (MX7847)

14

–

LDAC

Asynchronous Load – DAC input, active-low

–

14-24

DB10-DB0

Data Bit 10 to Data Bit 0 (LSB)

15

–

A1

Address Input – most significant address input for input latches

16

–

A0

Address Input – least significant address input for input latches

17-20

–

DB7-DB4

Data Bit 7 to Data Bit 4

21-24

–

DB3/DB11-

DB0/DB8

Data Bit 3 to Data Bit 0 (LSB), or Data Bit 11 (MSB) to Data Bit 8

____________________________Typical Operating Characteristics (continued)