AD7980 Datasheet

• High performance
  • Pseudo differential analog input range
    • 0 V to V_REF with V_REF between 2.5 V to 5 V
  • Throughput: 1 MSPS
    • 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
    • 4 mW at 1 MSPS (VDD only)
    • 7 mW at 1 MSPS (total)
    • 70 μW at 10 kSPS
• Proprietary serial interface
• SPI/QSPI/MICROWIRE^™/DSP compatible
• Daisy-chain multiple ADCs and busy indicator
• 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 AD7980 is a 16-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, it samples an analog input IN+ between 0 V to 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. Its power scales linearly with throughput.

The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single, 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO.

The AD7980 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +125°C.