Product details

Resolution (Bits) 12 Number of input channels 11 Sample rate (Max) (kSPS) 200 Interface type SPI Architecture SAR Input type Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int Input range (Max) (V) 5.5 Input range (Min) (V) 0 Features Oscillator Operating temperature range (C) -40 to 85 Power consumption (Typ) (mW) 2.43 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 69.5 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 1 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.5
Resolution (Bits) 12 Number of input channels 11 Sample rate (Max) (kSPS) 200 Interface type SPI Architecture SAR Input type Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int Input range (Max) (V) 5.5 Input range (Min) (V) 0 Features Oscillator Operating temperature range (C) -40 to 85 Power consumption (Typ) (mW) 2.43 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 69.5 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 1 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.5
SOIC (DW) 20 132 mm² 12.8 x 10.3 TSSOP (PW) 20 29 mm² 4.4 x 6.5
  • 12-Bit Resolution Analog-to-Digital Converter
    (ADC)
  • Up to 200-kSPS (150-kSPS for 3 V) Throughput
    Over Operating Temperature Range With 12-Bit
    Output Mode
  • 11 Analog Input Channels
  • Three Built-In Self-Test Modes
  • Inherent Sample and Hold Function
  • Programmable Reference Source (2.048 / 4.096 V
    Internal or External)
  • Inherent Sample and Hold Function
  • Linearity Error of ±1 LSB (Maximum)
  • On-Chip Conversion Clock
  • Programmable Conversion Status Output: INT
    or EOC
  • Unipolar or Bipolar Output Operation
  • Programmable Most Significant Bit (MSB) or Least
    Significant Bit (LSB) First
  • Programmable Power Down
  • Programmable Output Data Length
  • SPI-Compatible Serial Interface With I/O Clock
    Frequencies Up to 15 MHz (CPOL = 0,
    CPHA = 0)
  • 12-Bit Resolution Analog-to-Digital Converter
    (ADC)
  • Up to 200-kSPS (150-kSPS for 3 V) Throughput
    Over Operating Temperature Range With 12-Bit
    Output Mode
  • 11 Analog Input Channels
  • Three Built-In Self-Test Modes
  • Inherent Sample and Hold Function
  • Programmable Reference Source (2.048 / 4.096 V
    Internal or External)
  • Inherent Sample and Hold Function
  • Linearity Error of ±1 LSB (Maximum)
  • On-Chip Conversion Clock
  • Programmable Conversion Status Output: INT
    or EOC
  • Unipolar or Bipolar Output Operation
  • Programmable Most Significant Bit (MSB) or Least
    Significant Bit (LSB) First
  • Programmable Power Down
  • Programmable Output Data Length
  • SPI-Compatible Serial Interface With I/O Clock
    Frequencies Up to 15 MHz (CPOL = 0,
    CPHA = 0)

The TLV2556 device is a 12-bit switched-capacitor successive-approximation analog-to-digital converter (ADC). The ADC has three control inputs: chip select (CS), the input-output clock, and the address and control input (DATAIN). These inputs communicate 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 through configuration register 2 (CFGR2).

The TLV2556 is characterized for operation from TA = –40°C to +85°C.

The TLV2556 device is a 12-bit switched-capacitor successive-approximation analog-to-digital converter (ADC). The ADC has three control inputs: chip select (CS), the input-output clock, and the address and control input (DATAIN). These inputs communicate 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 through configuration register 2 (CFGR2).

The TLV2556 is characterized for operation from TA = –40°C to +85°C.

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Technical documentation

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Type Title Date
* Data sheet TLV2556 12-Bit 200-kSPS 11-Channel Low-Power Serial ADC With Internal Reference datasheet (Rev. B) PDF | HTML 23 Dec 2015
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs 21 May 2015
Application note Determining Minimum Acquisition Times for SAR ADCs, part 2 17 Mar 2011
Application note Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) 10 Nov 2010

Design & development

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Evaluation board

5-6KINTERFACE — 5-6K Interface Evaluation Module

The interface board consists of two signal conditioning sites, two serial EVM sites, and a parallel EVM site. Regardless of the interface type, all EVMs compatible with the 5-6K Interface Board have a standard analog interface and standard power connector. Three position screw terminals J1 and J2 (...)

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Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and (...)
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
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Simulation tool

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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
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