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ALP101 , 30 mm Actuator Lock Plate ALP101
ALS175 , HEX/QUADRUPLE D-TYPE FLIP-FLOPS WITH CLEAR
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ADS7891IPFBR-ADS7891IPFBT
2.7V-5.25V Digital, 5V Analog, 14 bit, 3 MSPS, Parallel ADC W/Ref
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SLAS410 − DECEMBER 2003
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FEATURES 3 MHz Sample Rate, 14-Bit Resolution Zero Latency Unipolar, Pseudo Differential Input, Range:
− 0 V to 2.5 V High Speed Parallel Interface 78 dB SNR and 88.5 dB THD at 3 MSPS Power Dissipation 85 mW at 3 MSPS Nap Mode (10 mW Power Dissipation) Power Down (10 �W) Internal Reference Internal Reference Buffer 8-/14-Bit Bus Transfer 48-Pin TQFP Package
APPLICATIONS Optical Networking (DWDM, MEMS Based
Switching) Spectrum Analyzers High Speed Data Acquisition Systems High Speed Close-Loop Systems Telecommunication Ultra-Sound Detection
DESCRIPTIONThe ADS7891 is a 14-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 14-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 a 48-pin TQFP package.
BYTE
14/8-Bit Parallel
Data Output Bus
CONVST
BUSYPWD/RST
+IN
−IN
REFIN
REFOUT
