The AD76911 is an 18-bit, charge redistribution, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V and 5 V. It contains a low power, high speed, 18-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between the IN+ and IN pins. The voltages on these pins swing in opposite phases between 0 V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage.
APPLICATIONS Battery-powered equipment Data acquisitions Seismic data acquisition systems Instrumentation Medical instruments
Feature
18-bit resolution with no missing codes Throughput: 250 kSPS INL: ±0.75 LSB typical, ±1.5 LSB maximum (±6 ppm of FSR) Dynamic range: 102 dB typical at 250 kSPS Oversampled dynamic range: 125 dB at1 kSPS Noise-free code resolution: 20 bits at 1 kSPS Effective resolution: 22.7 bits at 1 kSPS SINAD: 101.5 dB typical at 1 kHz THD: 125 dB typical at 1 kHz True differential analog input range: ±VREF 0 V to VREF with VREF up to VDD on both inputs No pipeline delay Single-supply 2.3 V to 5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface Proprietary serial interface SPI/QSPI/MICROWIRE/DSP compatible Ability to daisy-chain multiple ADCs Optional busy indicator feature Power dissipation 1.35 mW at 2.5 V/100 kSPS, 4 mW at 5 V/100 kSPS 1.4 μW at 2.5 V/100 SPS Standby current: 1 nA 10-lead packages: MSOP (MSOP-8 size) and 3 mm �� 3 mm LFCSP (SOT-23 size) Pin-for-pin compatible with the18-bit AD7690 and 16-bit AD7693, AD7688, and AD7687
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
