AD7111BQ

Description：IC DAC 17BIT A-OUT 16CDIP
Series：LOGDAC®

SKU:4be222e7a89d Category: Digital to Analog Converters (DAC) Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC DAC 17BIT A-OUT 16CDIP
Series：LOGDAC®
Mfr：Analog Devices Inc.
Package：Tube
Number of Bits：17
Number of D/A Converters：1
Settling Time：-
Output Type：Current - Unbuffered
Differential Output：No
Data Interface：Parallel
Reference Type：-
Voltage - Supply, Analog：5V
Voltage - Supply, Digital：5V
INL/DNL (LSB)：-
Architecture：R-2R
Operating Temperature：-40°C ~ 85°C
Package / Case：16-CDIP (0.300", 7.62mm)
Supplier Device Package：16-CERDIP
Mounting Type：Through Hole
Grade：-
Qualification：-

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AD7111BQ

Overview

The AD7111BQ is a monolithic multiplying D/A converter from the LOGDAC family, fabricated in LC2MOS technology. It provides an attenuation range of 0 dB to 88.5 dB with a nominal resolution of 0.375 dB. The device accepts an 8-bit digital input which is decoded into a 17-bit word for an R-2R ladder. It operates on a single +5 V supply and features unbuffered current output. The AD7111BQ is housed in a 16-pin Cerdip package and supports an industrial operating temperature range of -40°C to +85°C.

Feature Summary

17-bit internal resolution providing 0.375 dB step size over 88.5 dB dynamic range
8-bit parallel data interface with onboard decode logic
Edge-triggered Write (WR) input for data latching
Single +5 V power supply operation

Applications

Audio Attenuators
Sonar Systems
Function Generators
Digitally Controlled AGC Systems

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified secondary market suppliers. Confirm the specific B grade accuracy specifications and Cerdip package integrity prior to integration. Ensure ESD precautions are observed during handling due to CMOS sensitivity.

Selection Notes

Select the AD7111BQ when an industrial temperature range (-40°C to +85°C) and high monotonicity are required. The B grade guarantees specific attenuation accuracy ranges compared to commercial grades. Ensure the application utilizes a low bias current output amplifier, such as the AD711, to minimize DC offset errors caused by feedback resistance variations.

Part Context

The AD7111BQ belongs to the AD7111/AD7111A LOGDAC series. While the AD7111 uses edge-triggered WR inputs, the AD7111A variant uses level-triggered WR inputs and is pin-compatible with the AD7524. The B grade designation indicates industrial temperature performance within this family.

Replacement Considerations

Public confirmed substitute part numbers: ADA4610-1ARZ.

FAQ

What is the maximum attenuation range of the AD7111BQ?

The AD7111BQ can attenuate an analog input signal over a range of 0 dB to 88.5 dB.

How does the AD7111BQ handle digital data input?

It accepts an 8-bit binary word via the D0-D7 bus. This data is loaded into on-chip latches using CS and WR control signals and then decoded into a 17-bit word for the DAC.