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AD7948BRZ
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Product Detailed Parameters
- Description：IC DAC 12BIT A-OUT 20SOIC
- 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：Parallel
- 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：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SOIC
- Mounting Type：Surface Mount
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Overview
The AD7948BRZ is a 12-bit multiplying digital-to-analog converter (DAC) from Analog Devices, featuring an 8-bit byte interface. It operates on a single +5 V supply with guaranteed specifications for the industrial temperature range of -40°C to +85°C. The device provides a relative accuracy of ±0.5 LSBs maximum for both integral and differential nonlinearity. Key performance metrics include a typical output voltage settling time of 600 ns to 0.01% and a low digital-to-analog glitch impulse of 60 nV-s. Power consumption is typically 5 mW under normal operating conditions.
Feature Summary
- 12-bit resolution with ±0.5 LSB max INL and DNL
- 8-bit parallel byte interface with CSMSB, CSLSB, WR, and LDAC control
- Single +5 V supply operation with 600 ns settling time
- Low power dissipation of 5 mW typical
Applications
- Battery-powered instrumentation
- Laptop computers
- Upgrades for all 754x series DACs in 5 V designs
Procurement Notes
Verify that the component matches the specific B grade requirements for the -40°C to +85°C temperature range. Confirm the package type corresponds to the BR suffix (SOP-20). Ensure the design supports the required 5 V supply voltage for normal mode operation as specified in the datasheet.
Selection Notes
Select the AD7948BRZ when an 8-bit byte interface is preferred over the full 12-bit parallel bus of the AD7945 or the serial interface of the AD7943. This model is suitable for applications requiring fast data throughput via byte-wise loading while maintaining high linearity and low power consumption in standard 5 V systems.
Part Context
The AD7948BRZ belongs to the AD7943/AD7945/AD7948 family of fast 12-bit multiplying DACs. While functionally similar to the AD7945, it utilizes an 8-bit byte interface architecture. The 'B' grade indicates industrial temperature performance, and the 'R' suffix denotes the SOP-20 package option.
Replacement Considerations
The AD7948BRZ is designed to replace industry-standard AD7548 devices in 5 V designs. When substituting, ensure the host system supports the specific timing requirements for the 8-bit byte interface, including CSMSB, CSLSB, and WR signal constraints.
