描述The ADS7882 is a 12-bit 3-MSPS A-to-D converter with 2.5-V internal reference. The device includes a capacitor based SAR A/D converter with inherent sample and hold. The device offers a 12-bit parallel interface with an additional byte mode that provides easy interface with 8-bit processors. The device has a pseudo-differential input stage.The —IN swing of ±200 mV is useful to compensate for ground voltage mismatch between the ADC and sensor and also to cancel common-mode noise. With nap mode enabled, the device operates at lower power when used at lower conversion rates. The device is available in 48-pin TQFP package.特性3-MHz Sample Rate, 12-Bit Resolution Zero LatencyUnipolar, Pseudo Differential Input, Range: 0 V to 2.5 VHigh-Speed Parallel Interface69.5 dB SNR at 100 kHz I/PPower Dissipation 85 mW at 3 MSPSNap Mode (10 mW Power Dissipation)Power Down (10 µW)Internal ReferenceInternal Reference Buffer48-Pin TQFP PackageAPPLICATIONSOptical Networking (DWDM, MEMS Based Switching)Spectrum AnalyzersHigh Speed Data Acquisition SystemsHigh Speed Close-Loop SystemsTelecommunicationUltra-Sound Detection