AD7690

Data Sheet 18-Bit, 1.5 LSB INL, 400 kSPS PulSAR® Differential ADC in MSOP/LFCSP AD7690 FEATURES 18-bit resolution with no missing codes Throughput: 400 kSPS INL: ±0.75 LSB typical, ±1.5 LSB maximum (±6 ppm of FSR) Dynamic range: 102 dB at 400 kSPS Oversampled dynamic range: 125 dB at 1 kSPS Noise-free code resolution: 20 bits at 1 kSPS Effective resolution: 22.7 bits at 1 kSPS SINAD: 101.5 dB at 1 kHz THD: −125 dB 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 5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface Proprietary serial interface SPI/QSPI/MICROWIRE™/DSP compatible Daisy-chain multiple ADCs and busy indicator Power dissipation 4.25 μW at 100 SPS 4.25 mW at 100 kSPS Standby current: 1 nA 10-lead package: MSOP (MSOP-8 size) and 3 mm × 3 mm LFCSP (SOT-23 size) Pin-for-pin compatible with LFCSP/MSOP PulSAR 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 1.0 0.5 INL (LSB) 05792-025 0 –0.5 –1.0 –1.5 0 65536 131072 196608 CODE Figure 1. Integral Nonlinearity vs. Code 262144 Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result fro...