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AD7847ARZ
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Product Detailed Parameters
- Description：IC DAC 12BIT V-OUT 24SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：12
- Number of D/A Converters：2
- Settling Time：5µs
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：Parallel
- Reference Type：External
- Voltage - Supply, Analog：±14.25V ~ 15.75V
- Voltage - Supply, Digital：-
- INL/DNL (LSB)：±1 (Max), ±1 (Max)
- Architecture：R-2R
- Operating Temperature：-40°C ~ 85°C
- Package / Case：24-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：24-SOIC
- Mounting Type：Surface Mount
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Overview
The AD7847ARZ is a dual 12-bit multiplying digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features an R-2R segmented architecture with internally buffered voltage outputs and integrated feedback resistors. The device operates on ±15 V power supplies (range ±14.25 V to ±15.75 V) and supports a parallel interface via separate chip select inputs for each channel. Key performance metrics include a settling time of 3 µs, unity gain bandwidth of 750 kHz, and relative accuracy of ±1 LSB. It is housed in a 24-lead SOIC package and functions within a temperature range of -40°C to +85°C.
Feature Summary
- Dual 12-bit resolution with internally buffered voltage outputs
- Integrated feedback resistors eliminating external components
- Parallel interface with independent CSA/CSB chip selects
- Settling time of 3 µs and 750 kHz unity gain bandwidth
Applications
- Programmable Gain Amplifiers (PGA)
- Analog Panning Circuits
- Four-Quadrant Multiplication
Procurement Notes
Verify the specific suffix 'ARZ' corresponds to the SOIC-24 package and industrial temperature grade (-40°C to +85°C). Confirm RoHS compliance status as indicated in official documentation. Ensure ESD precautions are observed during handling due to the device's sensitivity.
Selection Notes
Select the AD7847ARZ when a dual-channel DAC with internal buffering and feedback resistors is required. This model is suitable for applications needing ±15 V operation and parallel data interfaces. Compare against the AD7837 if microprocessor interfacing with an 8-bit bus and separate LDAC control is preferred over the AD7847's direct latch structure.
Part Context
The AD7847ARZ belongs to the AD7837/AD7847 family of complete dual multiplying DACs. While sharing core specifications like resolution and architecture, it differs from the AD7837 by utilizing a simpler parallel interface with dedicated chip selects rather than address lines and a common LDAC pin. The 'ARZ' designation specifies the SOIC-24 surface-mount package and industrial operating temperature range.
Replacement Considerations
The AD7847BRZ offers improved relative accuracy of ±1/2 LSB compared to the AD7847ARZ's ±1 LSB. Both share identical pinouts, packages, and electrical characteristics except for linearity specifications.
