GENERAL DESCRIPTION

The MP7651 is ideal for direct gain control of video, composite video, CCD and other high frequency analog signals. The device 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. Stability, 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 cannot be achieved using a typical CMOS technology.

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

– VREF to VOUT Settling Time: 150ns to 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 with VREF = 1 V p-p @ 1 MHz

• VREF/2 Output Preset Level

• 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