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TLV2556 Datasheet(PDF) 1 Page - Texas Instruments |
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TLV2556 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 35 page TLV2556 SLAS355A – DECEMBER 2001 – REVISED SEPTEMBER 2002 12-BIT, 200-KSPS, 11 CHANNEL, LOW POWER, SERIAL ADC WITH INTERNAL REFERENCE 1 www.ti.com FEATURES D 12-Bit-Resolution A/D Converter D Up to 200-KSPS (150-KSPS for 3 V) Throughput Bit With 12-Output Mode Over Operating Temperature Range D 11 Analog Input Channels D 3 Built-In Self-Test Modes D Programmable Reference (2.048/4.096 V Internal, External) D Inherent Sample and Hold Function D Linearity Error ... ±1 LSB Max D On-Chip Conversion Clock D Programmable Conversion Status Output: INT or EOC D Unipolar or Bipolar Output Operation D Programmable MSB or LSB First D Programmable Power Down D Programmable Output Data Length D SPI Compatible Serial Interface With I/O Clock Frequencies up to 15 MHz (CPOL=0, CPHA=0) APPLICATIONS D Industrial Process Control D Portable Data Logging D Battery Powered Instruments D Automotive DESCRIPTION The TLV2556 is a 12-bit, switched-capacitor, successive-approximation, analog-to-digital converter. The ADC has three control inputs [chip select (CS), the input-output clock, and the address/control input (DATAIN)], designed for communication with the serial port of a host processor or peripheral through a serial 3-state output. In addition to the high-speed converter and versatile control capability, the device has an on-chip 14-channel multiplexer that can select any one of 11 inputs or any one of three internal self-test voltages using configuration register 1. The sample-and-hold function is automatic. At the end of conversion, when programmed as EOC, the pin 19 output goes high to indicate that conversion is complete. If pin 19 is programmed as INT, the signal goes low when the conversion is complete. The converter incorporated in the device features differential, high-impedance reference inputs that facilitate ratiometric conversion, scaling, and isolation of analog circuitry from logic and supply noise. A switched-capacitor design allows low- error conversion over the full operating temperature range. An internal reference is available and its voltage level is programmable via configuration register 2 (CFGR2). The TLV2556I is characterized for operation from TA = –40°C to 85°C. See available options table for package options. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright 2002, Texas Instruments Incorporated Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 AIN8 GND VCC INT/EOC I/O CLOCK DATA IN DATA OUT CS REF + REF – AIN10 AIN9 (TOP VIEW) PW AND DW PACKAGE |
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