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TLV2556IDWR-TLV2556IDWRG4-TLV2556IPW-TLV2556IPWR
12-Bit, 200 KSPS, 11 Channel, Low Power, Serial ADC with Internal Reference
4.096-V and 2.048-V
Internal Reference
Input Address
Register
Reference CTRL
Output Data
Low-Power 12-Bit
SAR ADC
VCC 14 13REF+ REF±
INT/EOC194 Self Test
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TLV2556SLAS355B –DECEMBER 2001–REVISED DECEMBER 2015
TLV2556 12-Bit 200-kSPS 11-Channel Low-Power Serial ADC With Internal Reference Features 3 DescriptionThe TLV2556 deviceisa 12-bit switched-capacitor 12-Bit Resolution Analog-to-Digital Converter successive-approximation analog-to-digital converter(ADC) (ADC). The ADC has three control inputs: chip select• Upto 200-kSPS (150-kSPS for3V) Throughput (CS), the input-output clock, and the address andOver Operating Temperature Range With 12-Bit control input (DATAIN). These inputs communicateOutput Mode with the serial portofa host processoror peripheral
througha serial 3-state output.• 11 Analog Input Channels Three Built-In Self-Test Modes In additionto the high-speed converter and versatile
control capability, the device has an on-chip 14-• Inherent Sample and Hold Function channel multiplexer that can select any oneof 11• Programmable Reference Source (2.048/ 4.096V inputsor any oneof three internal self-test voltagesInternalor External) using configuration register1. The sample-and-hold• Inherent Sample and Hold Function functionis automatic.At the endof conversion, when
programmedas EOC, the pin 19 output goes highto• Linearity Errorof±1 LSB (Maximum)
indicate that conversionis complete.If pin 19is• On-Chip Conversion Clock programmed as INT, the signal goes low when the• Programmable Conversion Status Output: INTor conversionis complete. The converter incorporatedinEOC the device features differential, high-impedance
reference inputs that facilitate ratiometric conversion,• Unipolaror Bipolar Output Operation
scaling, and isolationof analog circuitry from logic• Programmable Most SignificantBit (MSB)or Least and supply noise.A switched-capacitor design allowsSignificantBit (LSB) First low error conversion over the full operating• Programmable Power Down temperature range. An internal referenceis available
and its voltage level is programmable through• Programmable Output Data Length
configuration register2 (CFGR2).• SPI-Compatible Serial Interface With I/O Clock
Frequencies Upto15 MHz (CPOL=0, The TLV2556is characterizedfor operation from
CPHA=0) TA= –40°Cto +85°C.
Device Information(1)2 Applications• Industrial Process Control• Portable Data Logging• Battery-Powered Instruments
(1) Forall available packages, seethe package option addendum• Automotive atthe endofthe data sheet.
Block Diagram
