GENERAL DESCRIPTION
The MP7641 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 a +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% (typ). Stability, matching, and precision of the DACs are achieved by using EXAR’s thin film technology. Also, excellent channel-tochannel 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
• Dual Positive (+10 V and +5 V) Supplies or Dual (+5 V) Supplies Capability
• High Speed:
    – 12.5 MHz Digital Clock Rate
    – VREF to VOUT Settling Time: 150ns to 8–bit (typ)
    – Voltage Reference Input Bandwidth: 10 MHz
• Low Power: 150mW
• Low AC Voltage Reference Feedthrough
• Excellent Channel-to-Channel Isolation
• DNL = +0.8 LSB, INL = +1 LSB (typ)
• DACs Matched to +0.5% (typ)
• Chip Select Available: MP7651
• Low Harmonic Distortion: 0.25% typical with VREF = 1 V p-p @ 1 MHz
• VREF/2 Output Preset Level
• Latch-Up Free
• ESD Protection: 2000 V Minimum

APPLICATIONS
• Direct High-Frequency Automatic Gain Control
• Video AGC & CCD Level AGC
• Convergence Adjustment for High-Resolution Monitors (Workstations)