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AD7899AR-2REEL
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Product Detailed Parameters
- Description：IC ADC 14BIT 400KSPS 5V 28-SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- Number of Bits：14
- Sampling Rate (Per Second)：400k
- Number of Inputs：-
- Input Type：-
- Data Interface：Parallel
- Configuration：-
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：-
- Reference Type：-
- Voltage - Supply, Analog：-
- Voltage - Supply, Digital：-
- Features：-
- Operating Temperature：-40°C ~ 85°C
- Package / Case：28-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：28-SOIC
- Mounting Type：Surface Mount
- Grade：-
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Overview
The AD7899AR-2REEL is a 14-bit successive-approximation analog-to-digital converter (ADC) from Analog Devices, packaged in a 28-lead SOIC. It operates from a single 5 V supply and delivers a maximum throughput rate of 400 kSPS with a conversion time of 2.2 µs. This specific variant supports unipolar input ranges of 0 V to 2.5 V or 0 V to 5 V. Key electrical parameters include a typical power dissipation of 80 mW in normal mode and 100 µW in standby. The device features an internal 2.5 V reference, high-speed parallel interface compatible with 3 V or 5 V logic, and overvoltage protection on analog inputs.
Feature Summary
- High-speed parallel data interface supporting direct connection to 3 V and 5 V microprocessors.
- Integrated track/hold amplifier with fast acquisition time for accurate signal sampling.
- Built-in 2.5 V voltage reference with option for external reference override.
- Analog input overvoltage protection prevents damage during voltage excursions.
Applications
- Industrial process control systems requiring high-resolution data acquisition.
- Portable instrumentation powered by single-supply batteries.
- Digital signal processing front-ends interfacing with low-voltage processors.
Procurement Notes
Verify the suffix 'REEL' indicates tape-and-reel packaging when ordering. Confirm the '-2' designation matches the required unipolar input range (0 V to 2.5 V or 0 V to 5 V). Ensure the operating temperature range aligns with the 'A' grade specification (-40°C to +85°C). Cross-reference the pinout with the 28-lead SOIC package dimensions for PCB layout compatibility.
Selection Notes
Select this component if a 14-bit resolution and 400 kSPS speed are required for unipolar signals. Compare against AD7899-1 for bipolar ±10 V/±5 V ranges or AD7899-3 for ±2.5 V bipolar applications. Consider the parallel interface requirement versus serial alternatives like the AD7896 if pin count is constrained. Evaluate power consumption needs against the 80 mW typical draw in active mode.
Part Context
The AD7899 series comprises fast, low-power 14-bit ADCs designed for single-supply operation. The AD7899AR-2REEL belongs to the commercial temperature grade family, distinguished by its unipolar input configuration. It shares core architecture with bipolar variants but utilizes specific signal scaling circuitry for 0 V to 5 V or 0 V to 2.5 V inputs.
Replacement Considerations
AD7899AR-1 offers identical performance with bipolar ±10 V and ±5 V input ranges. AD7899AR-3 provides the same speed and resolution but supports a ±2.5 V bipolar input range. Both share the same package and interface characteristics.
