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AD7849CR
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Product Detailed Parameters
- Description：IC DAC 16BIT V-OUT 20SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：16
- Number of D/A Converters：1
- Settling Time：10µs (Typ)
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：SPI
- Reference Type：External
- Voltage - Supply, Analog：±14.25V ~ 15.75V
- Voltage - Supply, Digital：5V
- INL/DNL (LSB)：±8 (Max), ±0.5 (Max)
- Architecture：String DAC
- 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 AD7849CR is a 16-bit serial input multiplying digital-to-analog converter (DAC) from Analog Devices. It features a resistor string architecture ensuring guaranteed monotonicity over temperature. The device operates with dual analog supplies of ±14.25 V to ±15.75 V and a 5 V digital supply. Key electrical parameters include a typical settling time of 10 µs to 0.003% FSR, an output resistance of 0.3 Ω, and power dissipation of 100 mW. It utilizes a versatile three-wire SPI-compatible interface for data transfer.
Feature Summary
- 16-bit resolution with guaranteed monotonicity across the operating temperature range.
- Multiplying DAC architecture with external reference inputs (VREF+, VREF–).
- Versatile serial interface supporting standalone and daisy-chain modes via SDIN, SCLK, and SYNC.
- Internal voltage monitor clamps VOUT to 0 V during power-up/down sequences.
Applications
- Industrial process control systems requiring precise analog output.
- PC-based analog I/O boards for data acquisition.
- General instrumentation applications needing high linearity.
Procurement Notes
Verify the specific grade suffix against the datasheet ordering guide. The 'C' suffix denotes the commercial temperature range (-40°C to +85°C). Confirm package type requirements, as the part is available in 20-lead PDIP and SOIC configurations. Ensure supply voltages match the specified ranges for proper functionality.
Selection Notes
Select the AD7849CR for applications requiring 16-bit resolution and serial connectivity. Compare performance metrics such as differential nonlinearity (±0.5 LSB max) and gain error against system requirements. Consider the need for daisy-chaining capabilities if multiple channels are required in a single design.
Part Context
The AD7849 series includes A, B, and C grades. The A version offers 14-bit resolution, while B and C versions provide 16-bit resolution. The AD7849CR specifically refers to the C-grade variant in the commercial temperature range. It belongs to the broader family of serial input DACs designed for precision applications.
Replacement Considerations
Publicly confirmed substitute part numbers are not provided in the source material. Designers should consult official Analog Devices documentation for cross-reference information or evaluate other serial DACs with compatible pinouts and specifications.
