ADS7056
www.ti.com.cn
ZHCSG66 –MARCH 2017
8 Detailed Description
8.1 Overview
The ADS7056 is a 14-bit, 2.5-MSPS, analog-to-digital converter (ADC). The device includes a capacitor-based,
successive-approximation register (SAR) ADC that supports a wide analog input voltage range (0 V to AVDD, for
AVDD in the range of 2.35 V to 3.6 V). The device uses the AVDD supply voltage as the reference voltage for
conversion of analog input to digital output and the AVDD supply voltage also powers the analog blocks of the
device. The device has integrated offset calibration feature to calibrate its own offset; see the OFFCAL State
section for details.
The SPI-compatible serial interface is controlled by the CS and SCLK signals. The input signal is sampled with
the CS falling edge and SCLK is used for conversion and serial data output. The device supports a wide digital
supply range (1.65 V to 3.6 V), enabling direct interface to a variety of host controllers. The ADS7056 complies
with the JESD8-7A standard for a normal DVDD range (1.65 V to 1.95 V); see the Digital Voltage Levels section
for details.
The ADS7056 is available in 8-pin, miniature, X2QFN package and is specified over extended industrial
temperature range (–40°C to 125°C). Miniature form-factor and extremely low-power consumption make this
device suitable for space-constrained, battery-powered applications.
8.2 Functional Block Diagram
DVDD
AVDD
GND
Offset
Calibration
AINP
AINM
CS
SCLK
SDO
CDAC
Comparator
Serial
Interface
SAR
Copyright © 2017, Texas Instruments Incorporated
15
TI [ TEXAS INSTRUMENTS ]
