V62/08622-01XE中文资料德州仪器数据手册PDF规格书

1FEATURES

· 12-Bit-Resolution Analog-to-Digital Converter

(ADC)

· Up to 200-KSPS (150-KSPS for 3 V)

Throughput Bit With 12-Output Mode Over

Operating Temperature Range

· 11 Analog Input Channels

· 3 Built-In Self-Test Modes

· Programmable Reference (2.048 V/4.096 V

Internal or External)

· Inherent Sample and Hold Function

· Linearity Error...±1 LSB Max

· On-Chip Conversion Clock

· Programmable Conversion Status Output: INT

or EOC

· Unipolar or Bipolar Output Operation

· Programmable MSB or 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)

SUPPORTS DEFENSE, AEROSPACE,

AND MEDICAL APPLICATIONS

· Controlled Baseline

· One Assembly/Test Site

· One Fabrication Site

· Available in Military (–55°C/125°C)

Temperature Range(1)

· Extended Product Life Cycle

· Extended Product-Change Notification

· Product Traceability

APPLICATIONS

· Industrial Process Control

· Portable Data Logging

· Battery Powered Instruments

· Automotive

DESCRIPTION

The TLV2556 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/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).