Catalog
18-Bit, 1 MSPS PulSAR ADC in MSOP/LFCSP
Key Features
• High performanceTrue differential analog input range: ±VREF0 V to VREFwith VREFbetween 2.5 V to 5 VEasy to drive with the ADA4941-1 or ADA4940-1Throughput: 1 MSPSZero latency architecture18-bit resolution with no missing codesINL: ±1 LSB typical, ±2 LSB maximumDynamic range: 99 dB, VREF= 5 VSNR: 98 dB at fIN= 1 kHz, VREF= 5 VTHD: −119 dB at fIN= 1 kHz, VREF= 5 VSINAD: 97 dB at fIN= 1 kHz, VREF= 5 V
• True differential analog input range: ±VREF0 V to VREFwith VREFbetween 2.5 V to 5 VEasy to drive with the ADA4941-1 or ADA4940-1
• 0 V to VREFwith VREFbetween 2.5 V to 5 V
• Easy to drive with the ADA4941-1 or ADA4940-1
• Throughput: 1 MSPSZero latency architecture
• Zero latency architecture
• 18-bit resolution with no missing codes
• INL: ±1 LSB typical, ±2 LSB maximum
• Dynamic range: 99 dB, VREF= 5 V
• SNR: 98 dB at fIN= 1 kHz, VREF= 5 V
• THD: −119 dB at fIN= 1 kHz, VREF= 5 V
• SINAD: 97 dB at fIN= 1 kHz, VREF= 5 V
• Low power dissipationSingle-supply 2.5 V operation with 1.8 V, 2.5 V, 3 V, and 5 V logic interface4 mW at 1 MSPS (VDD only)7 mW at 1 MSPS (total)70 μW at 10 kSPS
• Single-supply 2.5 V operation with 1.8 V, 2.5 V, 3 V, and 5 V logic interface
• 4 mW at 1 MSPS (VDD only)
• 7 mW at 1 MSPS (total)
• 70 μW at 10 kSPS
• Proprietary serial interfaceSPI-/QSPI™/ MICROWIRE™-/DSP-compatible1
• SPI-/QSPI™/ MICROWIRE™-/DSP-compatible1
• Ability to daisy-chain multiple ADCs and busy indicator
• 10-lead MSOP and 3 mm × 3 mm 10-lead LFCSP
• Wide operating temperature range: −40°C to +85°C
Description
AI
The AD7982 is an 18-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. The AD7982 contains a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7982 samples the voltage difference between the IN+ and IN− pins. The voltages on these pins usually 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 serial peripheral interface (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. The AD7982 is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.The AD7982 is available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C.ApplicationsAutomated test equipmentData acquisition systemsMedical instrumentsMachine automation
