DAC-8841FP データシートの表示（PDF） - Analog Devices

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DAC-8841FP

8-Bit Octal, 2-Quadrant Multiplying, CMOS TrimDAC

Analog Devices 

ANALOG

DEVICES

8-Bit Octal, 2-Quadrant

Multiplying, CMOS TrimDAC

FEATURES

DAC-8841 FUNCTIONAL BLOCK DIAGRAM

Replaces 8 Potentiometers

Operates From Single +5 V Supply

1 MHz 2-Quadrant Muitipiying Bandwidth

No Signal Inversion

Eight Individual Channels

3-Wire Serial Input

LOAD i

500 kHz Update Data Loading Rate

+3 Volt Output Swing

Midscale Preset

Low 95 mW Power Dissipation

APPLICATIONS

E Trimmer Replacement

Dynamic Level Adjustment

Special Waveform Generation and Modulation

Programmable Gain Amplifiers

T GENERAL DESCRIPTION

The DAC-8841 provides eight general purpose digitally controDed

voltage adjustment devices. The TrimDAC™ capability replaces

E the mechanical trimmer function in new designs. It is ideal for

ac or dc gain control of up to 1 MHz bandwidth signals.

Internally the DAC-8841 contains eight voltage output CMOS

L digital-to-analog converters, each wi± separate reference inputs.

Each DAC has its own DAC register which holds its output

state. These DAC registers are updated from an internal serial-

to-parallel shift register which is loaded from a standard 3-wire

O serial input digital interface. Twelve data bits make up the data

word clocked into the serial input register. This data word is

decoded where the first 4 bits determine the address of the DAC

register to be loaded with the last 8 bits of data. A serial data

S output pin at the opposite end of the serial register allows sim

ple daisy-chaining in multiple DAC applications without addi

tional external decoding logic.

OB TrimDAC is a trademark of Analog Devices, Inc.

QND

SDO PRESET V^gpL

The DAC-8841 consumes only 95 mW froir a -1-5 V power sup

ply. For dual polarity applications see the DAC-8840 which pro

vides full 4-quadrant-multiplying ±3 V signal capability while

operating from ±5 V power supplies.

The DAC-8841 is available in 24-pin plastic DIP, cerdip, and

SOIC-24 packages. For MIL-STD/883 applications, contact

ADI sales for the DAC-8841BW/883 data sheet which specifies

operation over -55®C to 4-125°C.

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use; nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

Twx: 710/394-6577

Telex: 924491

Cable: ANALOG NORWOODMASS

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