MP7652 查看數據表（PDF） - Exar Corporation

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MP7652

4-Channel Voltage Output 15 MHz, Input Bandwidth, 8-Bit Multiplying DACs with 3-Wire Serial Digital Port and Independent References

Exar Corporation 

MP7652

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

– VREF to VOUT Settling Time: 150ns to 8–bit

(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

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)

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

small signal bandwidth from VREF to output up to 15 MHz (typ),

fast output settling time of 150 ns, and excellent VREF

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

VREFN within VCC –1.8 and VEE +1.5 V allows flexibility for opti-

mum system design.

The MP7652 is fabricated on a junction isolated, high speed

BiCMOS (BiCMOS IVTM) process with thin film resistors. This

process enables precision high speed analog/digital (mixed-

mode) circuits to be fabricated on the same chip.

ORDERING INFORMATION

Package

Type

SOIC

Plastic Dip

Temperature

Range

–40 to +85°C

–40 to +85°C

Part No.

MP7652AS

MP7652AN

INL

(LSB)

+1

+1

DNL

(LSB)

+0.5

+0.5

Gain Error

(% FSR)

+1.5

+1.5

Rev. 1.00

1

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