AD7118BQ AD [Analog Devices], AD7118BQ Datasheet

AD7118BQ

Manufacturer Part Number

AD7118BQ

Description

LOGDAC CMOS Logarithmic D/A Converter

Manufacturer

AD [Analog Devices]

Datasheet

1.AD7118BQ.pdf (6 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

AD7118BQ

Manufacturer:

ADI/亚德诺

Quantity:

20 000

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GENERAL DESCRIPTION

The LOGDAC

verter which attenuates an analog input signal over the range

0 to –85.5 dB in 1.5 dB steps. The analog output is determined

by a six-bit attenuation code applied to the digital inputs.

Operating frequency range of the device is from dc to several

hundred kHz.

The device is manufactured using an advanced monolithic

silicon gate thin-film on CMOS process and is packaged in a

14-pin dual-in-line package.

Model

AD7118KN

AD7118LN

AD7118BQ

AD7118CQ

AD7118TQ

AD7118UQ

NOTES

*Protected by U.S. Patent No. 4521,764.

REV. A

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.

N = Plastic DIP; Q = Cerdip.

To order MIL-STD-883, Class B processed parts, add /883B to part number.

LOGDAC is a registered trademark of Analog Devices, Inc.

FEATURES

Dynamic Range 85.5 dB

Resolution 1.5 dB

Full

Full Military Temperature Range –55 C to +125 C

Low Distortion

Low Power Consumption

Latch Proof Operation (Schottky Diodes Not Required)

Single 5 V to 15 V Supply

APPLICATIONS

Digitally Controlled AGC Systems

Audio Attenuators

Wide Dynamic Range A/D Converters

Sonar Systems

Function Generators

25 V Input Range Multiplying DAC

ORDERING INFORMATION

Temperature

Range

0 C to +70 C

–25 C to +85 C

–55 C to +125 C

AD7118 is a CMOS multiplying D/A con-

Specified

Accuracy

Range

0 to 42 dB

0 to 48 dB

0 to 42 dB

0 to 48 dB

0 to 42 dB

0 to 48 dB

Package

Option

N-16

Q-16

CMOS Logarithmic D/A Converter

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

Tel: 617/329-4700

FUNCTIONAL DIAGRAM

PIN CONFIGURATION

AD7118*

Fax: 617/326-8703

LOGDAC

Related parts for AD7118BQ

AD7118BQ Summary of contents

Page 1

... CMOS process and is packaged in a 14-pin dual-in-line package. ORDERING INFORMATION Temperature Model Range AD7118KN +70 C AD7118LN +70 C AD7118BQ – +85 C AD7118CQ – + AD7118TQ – +125 C 2 AD7118UQ – +125 C NOTES Plastic DIP ...

Page 2

AD7118–SPECIFICATIONS Parameter NOMINAL RESOLUTION ACCURACY RELATIVE AD7118L/C –30 dB –31 –42 dB –43 –48 dB AD7118K/B –30 dB –31 –42 dB MONOTONIC RANGE Nominal 1.5 ...

Page 3

ABSOLUTE MAXIMUM RATINGS +25 C unless otherwise noted (to DGND ...

Page 4

AD7118 CIRCUIT DESCRIPTION GENERAL CIRCUIT INFORMATION The AD7118 consists of a 17-bit R-2R CMOS multiplying D/A converter with extensive digital input logic. The logic translates the 6-bit binary input into a 17-bit word which is used to drive the D/A ...

Page 5

DYNAMIC PERFORMANCE The dynamic performance of the AD7118 will depend upon the gain and phase characteristics of the output amplifier, together with the optimum choice of PC board layout and decoupling components. Figure 4 shows a printed circuit layout which ...

Page 6

AD7118 –Typical Performance Characteristics Figure 7. Digital Threshold & Power Supply Current vs. Power Supply Figure 8. DC Attenuation Error vs. Attenuation & V Figure 9. DC Attenuation Error vs. Attenuation & Temperature Figure 10. Output Leakage Current as Temperature ...

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