AD7980ARMZRL7

The AD7980 is a 16-bit, successive approximation ADC that operates from a single supply (VDD). It incorporates a low power, high speed, 16-bit sampling ADC and a versatile serial interface port. On the rising edge of CNV, the device samples the analog input voltage difference between IN+ and IN−, ranging from 0 V to REF. The reference voltage (REF) is supplied externally and can be independent of the supply voltage (VDD). Power dissipation scales linearly with throughput rate. The SPI-compatible serial interface also features an SDI input that allows multiple ADCs to be daisy-chained on a single 3-wire bus, with optional busy indication. Using a separate supply VIO, it is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic. The AD7980 is available in a 10-lead MSOP or 10-lead QFN (LFCSP) package and is rated over a temperature range of −40°C to +125°C.

Applications

• Battery-powered equipment
• Communications
• Automatic test equipment
• Data acquisition
• Medical instrumentation

Key features

• 16-bit resolution, no missing codes
• Throughput rate: 1 MSPS
• Low power: 4 mW (1 MSPS, VDD only), 7 mW (1 MSPS, total power), 70 μW (10 kSPS)
• INL: ±0.6 LSB (typical), ±1.25 LSB (maximum)
• SINAD: 91.25 dB (10 kHz)
• THD: −110 dB (at 10 kHz)
• Pseudo-differential analog input range 0 V to VREF (VREF from 2.5 V to 5.5 V), any input range, easily driven with ADA4841
• No pipeline delay
• 2.5 V single-supply operation with 1.8 V/2.5 V/3 V/5 V logic interface
• Serial interface: SPI/QSPI/MICROWIRE/DSP compatible
• Daisy-chainable multiple ADCs with busy indicator
• 10-lead MSOP and 10-lead 3 mm×3 mm QFN (LFCSP), SOT-23 footprint compatible
• Wide operating temperature range: −40°C to +125°C