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AD7945ARS-BREEL
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Product Detailed Parameters
- Description：IC DAC 12BIT A-OUT 20SSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Bulk
- Number of Bits：12
- Number of D/A Converters：1
- Settling Time：5µs (Typ)
- Output Type：Current - Unbuffered
- Differential Output：No
- Data Interface：Parallel
- Reference Type：External
- Voltage - Supply, Analog：3V ~ 5.5V
- Voltage - Supply, Digital：3V ~ 5.5V
- INL/DNL (LSB)：±1 (Max), ±0.9 (Max)
- Architecture：R-2R
- Operating Temperature：-40°C ~ 85°C
- Package / Case：20-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：20-SSOP
- Mounting Type：Surface Mount
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Overview
The AD7945ARS-BREEL is a 12-bit multiplying digital-to-analog converter (DAC) from Analog Devices, part of the AD7943/AD7945/AD7948 family. It features a parallel interface and operates on a single +3.3 V to +5 V supply in Biased Mode or +5 V in Normal Mode. The device guarantees ±0.5 LSB relative accuracy with no missing codes. Key electrical parameters include a maximum settling time of 600 ns to 0.01%, a glitch impulse of 60 nV-s, and a typical power consumption of 5 mW. It is housed in a 20-lead Shrink Small Outline Package (SSOP).
Feature Summary
- 12-bit resolution with guaranteed monotonicity over temperature.
- Parallel data interface with active low Chip Select (CS) and Write (WR) inputs.
- Low power consumption: typically 5 μA quiescent current at VDD = 5 V.
- Fast settling time of 600 ns to 0.01% full-scale range.
Applications
- Battery-powered instrumentation systems.
- Laptop computer peripheral interfaces.
- Upgrades for legacy AD7545 series DAC designs.
Procurement Notes
Verify the package type matches the design requirements, as the AD7945 is available in DIP, SOP, and SSOP variants. Confirm the specific suffix indicates the correct temperature grade and packaging format. Ensure the ordering information aligns with the required supply voltage mode (Normal vs. Biased) for the target application.
Selection Notes
Select the AD7945ARS-BREEL when a parallel interface is preferred over serial options like the AD7943. Choose this variant for single-supply applications requiring biased mode operation (+3.3 V to +5 V). Verify that the 12-bit resolution and 600 ns settling time meet the system's speed and accuracy constraints compared to higher-resolution alternatives.
Part Context
This component belongs to the AD794x family of fast multiplying DACs. It serves as a direct replacement for the industry-standard AD7545, offering improved speed and lower power consumption while maintaining pin compatibility for many existing 5 V designs.
Replacement Considerations
The AD7945BN and AD7945BR are alternative packages within the same functional family. For legacy replacements, the AD7545 is the original counterpart, though performance specifications differ significantly.
