TLV2556-EP Datasheet, PDF (1/37 Pages) Texas Instruments – 12-BIT 200-KSPS 11-CHANNEL LOW-POWER SERIAL ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE

TLV2556-EP
www.ti.com ................................................................................................................................................... SLAS598A – NOVEMBER 2008 – REVISED JULY 2009
12-BIT 200-KSPS 11-CHANNEL LOW-POWER SERIAL ANALOG-TO-DIGITAL CONVERTER
WITH INTERNAL REFERENCE
FEATURES
1
• 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
(1) Additional temperature ranges are available - contact factory
PW AND DW PACKAGE
(TOP VIEW)
AIN0 ₁
AIN1 ₂
AIN2 3
AIN3 4
AIN4 5
AIN5 6
AIN6 7
AIN7 8
AIN8 9
GND 10
20 ^VCC
19 ^INT/EOC
18 I/O CLOCK
17 DATA IN
16 DATA OUT
15 CS
14 REF +
13 REF −
12 AIN10
11 AIN9
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).
1
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2009, Texas Instruments Incorporated