AD7988-5 Datasheet

• High performance
  • Pseudo differential analog input range 0 V to V_REF with V_REF from 2.5 V to 5.0 V
  • Throughput: 500 kSPS/100 kSPS options Zero latency architecture
  • 16-bit resolution with no missing codes
  • INL: ±0.6 LSB typical, ±1.25 LSB maximum
  • Dynamic range: 92 dB, V_REF = 5 V
  • SNR: 91.5 dB at f_IN = 10 kHz, V_REF = 5 V
  • THD: −114 dB at f_IN = 10 kHz, V_REF = 5 V
  • SINAD: 91 dB at f_IN = 10 kHz, V_REF = 5 V
• Low power dissipation
  • Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
  • AD7988-1: 400 μW at 100 kSPS (VDD only)
    • 700 μW at 100 kSPS (total)
  • AD7988-5: 2 mW at 500 kSPS (VDD only)
    • 3.5 mW at 500 kSPS (total)
  • 70 μW at 10 kSPS (total)
• Proprietary SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface
• 10-lead MSOP, 10-lead 3 mm × 3 mm LFCSP
• Wide operating temperature range: −40°C to +125°C

• Automated test equipment
• Data acquisition systems
• Medical instruments
• Machine automation

The 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 V_REF 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 AD7988-5 generics are housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +125°C.