MP7643 datasheet, PDF - EEWORLD Datasheet

MP7643: Description4-Channel, Programmable Gain Voltage Output, 15 MHz Input Bandwidth 8-Bit DACs with Multiplying Parallel Digital Data Port; File Size100KB，12 Pages; ManufacturerExar [Exar Corporation]

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MP7643 Overview

4-Channel, Programmable Gain Voltage Output, 15 MHz Input Bandwidth 8-Bit DACs with Multiplying Parallel Digital Data Port

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MP7643

4-Channel, Programmable Gain

Voltage Output, 15 MHz Input Bandwidth

8-Bit DACs with Multiplying

Parallel Digital Data Port

FEATURES

•

Programmable Gain

•

4 Independent 2-Quadrant Multiplying 8-Bit DACs

with Output Amplifiers

•

Dual Positive (+10 V and +5 V) Supplies or

Dual (+5 V) Supplies Capability

•

High Speed:

– 12.5 MHz Digital Clock Rate

– V

REF to

OUT

Settling Time: 150ns to 8-bit

(typ)

– Voltage Reference Input Bandwidth:

15 MHz

•

Very Low Noise Gain Control

•

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)

•

Low Harmonic Distortion: 0.25% typical with

REF

= 1 V p-p @ 1 MHz

•

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)

•

Multiplier Replacement

GENERAL DESCRIPTION

The MP7643 is ideal for digital gain control of high frequency

analog signals such as video, composite video and CCD. 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, match-

ing, and precision of the DACs are achieved by using MPS’ thin

film technology. Excellent channel-to-channel isolation is also

achieved with MPS’ BiCMOS process which cannot be

achieved using a typical CMOS technology.

An open loop architecture (patent pending) provides wide

small signal bandwidth from V

REF

to output up to 15 MHz (typ),

fast output settling time of 150 ns, and excellent V

REF

feedthrough isolation. The negative feedback terminal of the

output op amp is available for user gain control. In addition, 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

REFN

within V

–1.8 V to V

+1.5 V allows flexibility for opti-

mum system design.

The MP7643 is fabricated on a junction isolated, high speed

BiCMOS (BiCMOS IV

) 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

Part No.

MP7643AS

MP7643AN

INL

(LSB)

DNL

(LSB)

+0.5

Gain Error

(% FSR)

+1.5

Rev. 1.00

MP7643 Related Products

	MP7643	MP7643AS	MP7643AN
Description	4-Channel, Programmable Gain Voltage Output, 15 MHz Input Bandwidth 8-Bit DACs with Multiplying Parallel Digital Data Port	4-Channel, Programmable Gain Voltage Output, 15 MHz Input Bandwidth 8-Bit DACs with Multiplying Parallel Digital Data Port	4-Channel, Programmable Gain Voltage Output, 15 MHz Input Bandwidth 8-Bit DACs with Multiplying Parallel Digital Data Port

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