16Bit, 500KSPS, Ultra Lower Power 16Bit SAR ADC
Product Details
The AD7988-1/AD7988-5 are 16-bit, successive approximation, analog-to-digital converters ADC that operate from a single power supply, VDD. The AD7988-1 offers a 100 kSPS throughput, and the AD7988-5 offers a 500 kSPS throughput. They are low power, 16-bit sampling ADCs with a versatile serial interface port. On the CNV rising edge, they sample an analog input, IN+, between 0 V to VREF with respect to a ground sense, IN−. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD.
The SPI-compatible serial interface also features the ability to daisy-chain several ADCs on a single 3-wire bus using the SDI input. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply, VIO.
The AD7988-1/AD7988-5 generics are housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +125°C.
Applications
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- Battery-powered equipment
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- Low power data acquisition systems
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- Portable medical instruments
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- ATE equipment
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- Data acquisitions
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- Communications
### Features and Benefits
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- Low power dissipation
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- 2 mW at 500 kSPS VDD only
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- 3.5 mW at 500 kSPS total
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- 16-bit resolution with no missing codes
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- Throughput: 100 kSPS/500 kSPS options
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- INL: ±0.6 LSB typical, ±1.25 LSB maximum
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- SINAD: 91.5 dB at 10 kHz
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- THD: −114 dB at 10 kHz
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- Pseudo differential analog input range
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- 0 V to VREF with VREF from 2.5 V to 5.5 V
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- No pipeline delay
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- Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
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- Proprietary SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface
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- Daisy-chain multiple ADCs
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- 10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP, same space as SOT-23
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- Wide operating temperature range: −40°C to +125°C
