ChipApex | Global Electronic Components Supplier
AD7837AR
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 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
- Grade：-
- Qualification：-
Download product information
Overview
The AD7837AR is a dual 12-bit multiplying digital-to-analog converter (MDAC) manufactured by Analog Devices Inc. It features an R-2R segmented architecture with integrated output amplifiers in a 24-lead SOIC package. The device operates on ±14.25 V to ±15.75 V supplies and accepts parallel data via a microprocessor-friendly interface. Key electrical specifications include a settling time of 3 µs typ, relative accuracy of ±1 LSB max, and unity gain small signal bandwidth of 750 kHz. It supports unipolar binary and bipolar offset binary coding for four-quadrant multiplication applications.
Feature Summary
- Dual 12-bit MDACs with integrated buffered voltage outputs
- Parallel loading structure optimized for 8-bit microprocessor buses
- Simultaneous update capability via asynchronous LDAC input
- High channel-to-channel isolation (-95 dB typ)
Applications
- Automatic Test Equipment
- Programmable Power Supplies
- Synchro Applications
Procurement Notes
Verify the specific revision level against the latest Analog Devices documentation before integration. Confirm that the +15V/-15V power supply rails match the specified operating range of ±14.25V to ±15.75V. Ensure proper decoupling capacitors are placed near VDD and VSS pins to maintain signal integrity.
Selection Notes
Select the AD7837AR when an 8-bit wide parallel interface is required for system compatibility. Choose this model over the AD7847 if simultaneous updating of multiple channels via a shared LDAC line is necessary. Verify that the ±1 LSB relative accuracy meets the system's linearity requirements.
Part Context
The AD7837AR belongs to the AD7837/AD7847 family of complete dual 12-bit DACs. It differs from the AD7847 primarily in its input latch structure; the AD7837 uses an 8+4 bit loading scheme suitable for 8-bit data buses, whereas the AD7847 uses a direct 12-bit latch structure.
Replacement Considerations
Public confirmed substitute part numbers: None identified in verified source material.
FAQ
How does the AD7837 handle data updates?
Data is loaded into separate input latches via CS, WR, A0, and A1. The LDAC input asynchronously transfers data from the input latches to the DAC latches, allowing simultaneous updates of both analog outputs.
What is the maximum settling time specification?
The voltage output settling time is typically 3 µs and maximally 5 µs to within ±1/2 LSB of the final value.
Can the AD7837 perform four-quadrant multiplication?
Yes, when connected in bipolar offset binary operation with appropriate external resistors, the circuit performs four-quadrant multiplication.
