MP7652

1

Rev. 1.00

4-Channel Voltage Output

15 MHz, Input Bandwidth, 8-Bit Multiplying

DACs with 3-Wire Serial Digital Port

and Independent References

FEATURES

• Independent References

• 4 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

(typ)

–

Voltage Reference Input Bandwidth:

15 MHz

• Low Power: 80mW

• Low AC Voltage Reference Feedthrough

• Excellent Channel-to-Channel Isolation

• DNL = +0.5 LSB, INL = +1 LSB (typ)

• DACs Matched to +0.5% (typ)

• Very Low Noise

• Low Harmonic Distortion: 0.25% typical with

• 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)

GENERAL DESCRIPTION

The MP7652 is ideal for digital gain control of high frequency

analog signals such as video, composite video, CCD and oth-

ers.

The device includes 4-channels of high speed,

wide

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) load. DNL of better than +0.5

LSB is achieved with a channel-to-channel matching of typically

0.5%.

Stability, matching, and precision of the DACs are

achieved by using MPS’ thin film technology. Also, excellent

channel-to-channel isolation is achieved with EXAR’s BiCMOS

process which cannot be achieved using a typical CMOS tech-

nology.

An open loop architecture (patent pending) provides wide

feedthrough isolation. The bottom of each DAC reference string

is brought out separately for totally isolated operation. In addi-

tion, low distortion in the order of 0.25% with a 1 V p-p, 1 MHz

signal is achieved.

The combination of a constant input Z and the ability to vary

mum system design.

The MP7652 is fabricated on a junction isolated, high speed

process enables precision high speed analog/digital (mixed-

mode) circuits to be fabricated on the same chip.

ORDERING INFORMATION

Package

Type

Temperature

Range

Part No.

Gain Error

(% FSR)

SOIC

–40 to +85

MP7652AS

+0.5

+1+1.5

Plastic Dip

–40 to +85

MP7652AN

+0.5

+1+1.5

INL

(LSB)

DNL

(LSB)