AD7690
AD7690 is Differential ADC manufactured by Analog Devices.
FEATURES
18-bit resolution with no missing codes Throughput: 400 k SPS INL: ±0.75 LSB typical, ±1.5 LSB maximum (±6 ppm of FSR) Dynamic range: 102 d B at 400 k SPS Oversampled dynamic range: 125 d B at 1 k SPS Noise-free code resolution: 20 bits at 1 k SPS Effective resolution: 22.7 bits at 1 k SPS SINAD: 101.5 d B at 1 k Hz THD:
- 125 d B at 1 k Hz True differential analog input range: ±VREF
0 V to VREF with VREF up to VDD on both inputs No pipeline delay Single-supply 5 V operation with
1.8 V/2.5 V/3 V/5 V logic interface Proprietary serial interface
SPI/QSPI/MICROWIRE™/DSP patible Daisy-chain multiple ADCs and busy indicator Power dissipation
4.25 μW at 100 SPS 4.25 m W at 100 k SPS Standby current: 1 n A 10-lead package: MSOP (MSOP-8 size) and 3 mm × 3 mm LFCSP (SOT-23 size) Pin-for-pin patible with LFCSP/MSOP Pul SAR ADCs
APPLICATIONS
Battery-powered equipment Data acquisition Seismic data acquisition systems DVMs Instrumentation Medical instruments
1.5 POSITIVE INL = +0.42LSB NEGATIVE INL =
- 0.6LSB
INL (LSB)
05792-025
- 0.5
- 1.0
- 1.5 0
CODE
Figure 1. Integral Nonlinearity vs. Code
Rev. C
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APPLICATION EXAMPLE
+2.5V TO +5V +5V
±10V, ±5V, ... ADA4941-1
REF VDD VIO
IN+
IN- GND
SDO CNV
Figure 2.
+1.8V TO VDD 3- OR 4-WIRE INTERFACE (SPI, DAISY CHAIN,...
