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AD7948BRS-REEL
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Product Detailed Parameters
- Description：IC DAC 12BIT MULT PARALL 20-SSOP
- Series：*
- Mfr：Analog Devices Inc.
- Package：Bulk
- Number of Bits：-
- Number of D/A Converters：-
- Settling Time：-
- Output Type：-
- Differential Output：-
- Data Interface：-
- Reference Type：-
- Voltage - Supply, Analog：-
- Voltage - Supply, Digital：-
- INL/DNL (LSB)：-
- Architecture：-
- Operating Temperature：-
- Package / Case：20-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：20-SSOP
- Mounting Type：Surface Mount
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Overview
The AD7948BRS-REEL is a 12-bit multiplying digital-to-analog converter (DAC) from Analog Devices, featuring an 8-bit byte interface. It operates on a single +3.3 V to +5 V supply and guarantees ±0.5 LSB integral and differential nonlinearity. The device provides current output with a typical glitch impulse of 60 nV-s and settles to 0.01% in 600 ns. Packaged in a 20-lead SSOP, it supports normal mode (+5 V) and biased mode (+3.3 V to +5 V) configurations for versatile system integration.
Feature Summary
- 12-bit resolution with ±0.5 LSB INL/DNL accuracy
- 8-bit parallel byte interface with CSMSB/CSLSB control
- Low power consumption: 5 mW typical at +5 V
- Fast settling time of 600 ns to 0.01%
Applications
- Battery-powered instrumentation
- Laptop computer upgrades
- Replacement for AD7548 series DACs
Procurement Notes
Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the B grade corresponds to the -40°C to +85°C industrial temperature range. Ensure the RS package designation matches the required 20-lead SSOP footprint for PCB layout compatibility.
Selection Notes
Select this model for applications requiring an 8-bit parallel interface instead of full 12-bit parallel or serial options. Choose the B grade for standard industrial temperature ranges. Consider the AD7945 if a full 12-bit parallel bus is preferred, or the AD7943 if a serial interface is necessary for pin count reduction.
Part Context
This component belongs to the AD7943/AD7945/AD7948 family of fast 12-bit multiplying DACs. While sharing core architecture and accuracy specifications, the AD7948 is distinct due to its 8-bit byte interface, which simplifies data loading in systems where microcontrollers provide 8-bit wide buses.
Replacement Considerations
The AD7948BRS-REEL serves as a direct drop-in replacement for the industry-standard AD7548 in 5 V designs, offering superior speed and lower power consumption. Verify that the existing circuit supports the specific timing requirements of the AD7948 write cycle.
