MP7651

1

Rev. 2.00

8-Channel, Voltage Output

10 MHz Input Bandwidth 8-Bit Multiplying

DACs with Serial Digital Data Port

and Chip Select Decoder

FEATURES

• 8 Independent 2-Quadrant Multiplying 8-Bit DACs

• Serial Digital Input Data and Address Port (3-Wire

Standard) plus Internal Chip Address Decoder

©

• Dual Supplies (+5 V typ.)

• High Speed:

–

12.5 MHz Digital Clock Rate

8-bit (typ)

–

Voltage Reference Input Bandwidth:

10 MHz (typ)

• Low Power: 150mW (typ)

• Low AC Voltage Reference Feedthrough

• Excellent Channel-to-Channel Isolation

• DNL = +0.8 LSB, INL = +1 LSB (typ)

• DACs Matched to +0.5% (typ)

• Low Harmonic Distortion: 0.25% typical

• Latch-Up Proof

• Greater than 2000 V ESD Protection

APPLICATIONS

• ATE

• Process Control (Low Noise)

• Convergence Adjustment for High

Resolution Monitors (Work Stations)

• Digital Gain/Attenuation/Offset Control

• Trimmer Replacement

GENERAL DESCRIPTION

The MP7651 is ideal for direct gain control of video, compos-

ite video, CCD and other high frequency analog signals. The de-

vice includes 8-channels of high speed, high bandwidth, two

quadrant, multiplying, 8-bit accurate digital-to-analog converter.

It includes an output drive buffer per channel capable of driving

+1mA (typ) to a load. DNL of better than +0.8 LSB is achieved

with a channel-to-channel matching of better than 0.5%. Stabil-

ity, matching, and precision of the DACs is achieved by using

EXAR’s thin film technology. Also, excellent channel-to-channel

isolation is achieved with EXAR’s BiCMOS process which can-

not be achieved using a typical CMOS technology.

An open loop architecture (patent pending) provides wide

–65dB or better. In addition, low distortion in the order of 0.25%

with a 1 V p–p, 1 MHz signal.

put gives flexibility for optimal system design. The serial data

3-wire standard

µ-processor logic interface reduces pin count,

package size (28 pin), and board wire (space). Additionally, the

internal chip select decoder allows for easy daisy chaining with-

out the addition of separate control logic.

MP7651 is fabricated on a junction isolated, high speed, dual

tors. This process enables precision high speed analog/digital

(mixed-mode) circuits to be fabricated on the same chip.