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AD7943BRZ
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Product Detailed Parameters
- Description：IC DAC 12BIT A-OUT 16SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：12
- Number of D/A Converters：1
- Settling Time：600µs (Typ)
- Output Type：Current - Unbuffered
- Differential Output：No
- Data Interface：Serial
- Reference Type：External
- Voltage - Supply, Analog：5V
- Voltage - Supply, Digital：5V
- INL/DNL (LSB)：±0.5 (Max), ±0.5 (Max)
- Architecture：R-2R
- Operating Temperature：-40°C ~ 85°C
- Package / Case：16-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：16-SOIC
- Mounting Type：Surface Mount
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Overview
The AD7943BRZ is a 12-bit multiplying digital-to-analog converter (DAC) from Analog Devices, featuring a serial interface. It operates from a single +5 V supply in Normal Mode or a +3.3 V to +5 V supply in Biased Mode. The device guarantees ±0.5 LSB integral and differential nonlinearity with a typical power consumption of 5 mW. Key performance metrics include a settling time of 600 ns to 0.01% and a glitch impulse of 60 nV-s. It utilizes a segmented architecture with an R-2R ladder for the lower 10 bits and decoded switches for the two most significant bits.
Feature Summary
- 12-bit resolution with guaranteed ±0.5 LSB INL and DNL
- Serial interface with 40 ns strobe pulsewidth
- Low power consumption: typically 5 mW
- Fast settling time of 600 ns to 0.01%
- Compatible replacement for industry-standard AD7543
Applications
- Battery-powered instrumentation
- Laptop computers
- Upgrades for all 754x series DACs in 5 V designs
Procurement Notes
Verify the package option 'R' corresponds to the SOP (Small Outline Package) variant as specified in the ordering guide. Confirm the temperature range is industrial (-40 °C to +85 °C). Ensure the B grade specifications are required, as they offer tighter linearity tolerances compared to A grades.
Selection Notes
Select the AD7943BRZ when a serial interface is preferred over parallel options like the AD7945. Choose this component for applications requiring low power and fast settling times within a single-supply environment. Verify that the system can accommodate the 16-lead SOP package dimensions and thermal requirements.
Part Context
The AD7943BRZ belongs to the AD7943/AD7945/AD7948 family of fast 12-bit multiplying DACs. While the AD7945 uses a parallel interface and the AD7948 uses an 8-bit byte interface, the AD7943 specifically provides a serial data path. All variants share similar core DAC architecture and performance characteristics.
Replacement Considerations
The datasheet explicitly states these devices will replace the industry-standard AD7543 in many applications. Designers upgrading from the AD7543 should verify pin compatibility and ensure the new serial control logic is implemented correctly.
