ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC DAC 17BIT A-OUT 16DIP
- Series：LOGDAC®
- Mfr：Analog Devices Inc.
- Package：Tube,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：0°C ~ 70°C
- Package / Case：16-DIP (0.300", 7.62mm)
- Supplier Device Package：16-PDIP
- Mounting Type：Through Hole
- Grade：-
- Qualification：-
Download product information
Overview
The AD7111LN is a monolithic logarithmic digital-to-analog converter (DAC) from Analog Devices, part of the LOGDAC family. It provides an attenuation range of 0 dB to 88.5 dB with a nominal resolution of 0.375 dB. The device utilizes an internal 17-bit R-2R ladder driven by decoded 8-bit input data. It operates on a single +5 V supply and features on-chip data latches for parallel microprocessor interfacing. The AD7111LN is specified for commercial temperature operation (0°C to +70°C) and is housed in a 16-pin Plastic DIP package.
Feature Summary
- Logarithmic Attenuation: Provides 0 dB to 88.5 dB dynamic range in 0.375 dB steps.
- High Resolution: Internal 17-bit R-2R DAC architecture ensures fine step resolution across the entire range.
- Parallel Interface: Accepts standard 8-bit binary data via D0–D7 inputs with edge-triggered Write (WR) control.
- Single Supply Operation: Functions with a +5 V power supply and low current consumption.
Applications
- Sonar Systems
- Audio Attenuators
- Function Generators
- Digitally Controlled AGC Systems
Procurement Notes
Verify the specific grade suffix 'LN' against the manufacturer's ordering guide to confirm the commercial temperature range (0°C to +70°C) and 16-pin Plastic DIP package option. Ensure compatibility with existing system voltage levels and interface timing requirements before procurement.
Selection Notes
Select the AD7111LN when a wide dynamic range logarithmic attenuation is required within a commercial temperature environment. Compare performance metrics such as gain error and monotonicity ranges against other grades if industrial or extended temperature specifications are necessary for the application.
Part Context
The AD7111LN belongs to the AD7111/AD7111A LOGDAC series, which are multiplying D/A converters designed for precise signal attenuation. This series is distinct from linear DACs like the AD7524, offering superior dynamic range and resolution for applications requiring exponential control of analog signals.
Replacement Considerations
The AD7111A is pin-compatible with the industry-standard AD7524, allowing for upgrades in existing designs. However, direct replacement requires verifying that the logarithmic transfer function meets the system requirements compared to the linear response of the AD7524.
FAQ
What is the maximum attenuation range of the AD7111LN?
The AD7111LN can attenuate an analog input signal over a range of 0 dB to 88.5 dB.
How is the attenuation level controlled?
Attenuation is determined by an 8-bit binary word applied to the D0–D7 inputs, which is decoded internally into a 17-bit word to drive the R-2R ladder.
Is the AD7111LN monotonic over its full range?
Monotonicity depends on the step size. For the L-grade devices, it is guaranteed monotonic in 0.375 dB steps up to 54 dB and in larger step sizes at higher attenuation levels.
