描述The ADS8422 is a 16-bit, 4-MHz A/D converter with an internal 4.096-V reference. The device includes a 16-bit capacitor-based multi-bit SAR A/D converter with inherent sample and hold. This converter includes a full 16-bit interface and an 8-bit option where data is read using two 8-bit read cycles if necessary.The ADS8422 has a fully differential, pseudo-bipolar input. It is available in a 48-lead TQFP package and is characterized over the industrial -40°C to +85°C temperature range.特性Fully Differential Input with Pseudo-Bipolar Input Range-4 V to+4 V16-Bit NMC at 4 MSPS1 LSB INL Typ92dB SNR, -102dB THD Typ with 100-kHz InputInternal 4.096-V Reference and Reference BufferREFIN/2 Available for Setting Analog Input Common-Mode VoltageZero LatencyHigh-Speed Parallel InterfaceSingle Supply Operation CapabilityLow Power: 155 mW at 4 MHz Typ,Flexible Power-Down SchemePin-Out Similar to ADS8412/840248-Pin 9×9 TQFP PackageAPPLICATIONSDWDM InstrumentationHigh-Speed, High-Resolution, Zero LatencyData Acquisition SystemsTransducer InterfaceMedical InstrumentsSpectrum Analysis ATE