AD7989-5BRMZ-RL7
Analog to Digital Converters - ADC ADC, Pulsar 18Bit, 500KSPS
Product Details
The AD7989-1/AD7989-5 are 18-bit, successive approximation, analog-to-digital converters ADCs that operate from a single power supply, VDD. The AD7989-1/AD7989-5 contain a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7989-1/AD7989-5 sample the voltage difference between the IN+ and IN− pins. The voltages on these pins typically swing in opposite phases between 0 V and VREF. The reference voltage, VREF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.
The AD7989-1/AD7989-5 are serial peripheral interface SPI- compatible, which features the ability, using the SDI/CS input, to daisy-chain several ADCs on a single 3-wire bus. The AD7989-1/AD7989-5 are compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.
The AD7989-1/AD7989-5 are available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C.
**Applications**
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- Battery-powered equipment
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- Data acquisition systems
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- Medical instruments
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- Seismic data acquisition systems
### Features and Benefits
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- Low power dissipation
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- 2 mW at 500 kSPS typical VDD only
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- 3.5 mW at 500 kSPS typical total
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- 18-bit resolution with no missing codes
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- Throughput: 500 kSPS
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- INL: ±1 LSB typical, 2 LSB maximum
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- SNR: 98 dB at 1 kHz, VREF = 5 V typical
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- SINAD: 97 dB at 1 kHz typical
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- THD: −120 dB at 10 kHz typical
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- Dynamic range: 99 dB at VREF = 5 V typical
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- True differential analog input voltage range: ±VREF
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- 0 V to VREF with VREF between 2.4 V and 5.1 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, and 5 V logic interface
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- Proprietary serial interface SPI-/QSPI™-/MICROWIRE™-/DSP-compatible
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- Ability to daisy-chain multiple ADCs
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- 10-lead MSOP and 3 mm × 3 mm 10-Lead LFCSP