ADS1118_13 Datasheet, PDF (1/38 Pages) Texas Instruments – Ultra-Small, Low-Power, SPI™-Compatible, 16-Bit Analog-to-Digital Converter and Temperature Sensor with Internal Reference

ADS1118
www.ti.com
SBAS457C – OCTOBER 2010 – REVISED FEBRUARY 2013
Ultra-Small, Low-Power, SPI™-Compatible, 16-Bit
Analog-to-Digital Converter and Temperature Sensor with Internal Reference
Check for Samples: ADS1118
FEATURES
1
•23 Ultra-Small QFN Package:
2 mm × 1,5 mm × 0,4 mm
• Wide Supply Range: 2.0 V to 5.5 V
• Low Current Consumption:
– Continuous Mode: Only 150 μA
– Single-Shot Mode: Auto Power-Down
• Programmable Data Rate:
8 SPS to 860 SPS
• Single-Cycle Settling
• Internal Low-Drift Voltage Reference
• Internal Temperature Sensor:
0.5°C (max) Error
• Internal Oscillator
• Internal PGA
• Four Single-Ended or Two Differential Inputs
APPLICATIONS
• Temperature Measurement:
– Thermocouple Measurement
– Cold Junction Compensation
– Thermistor Measurement
• Portable Instrumentation
• Factory Automation and Process Controls
DESCRIPTION
The ADS1118 is a precision analog-to-digital
converter (ADC) with 16 bits of resolution offered in
an ultra-small, leadless QFN-10 package or an
MSOP-10 package. The ADS1118 is designed with
precision, power, and ease of implementation in
mind. The ADS1118 features an integrated voltage
reference and oscillator. Data are transferred via a
serial peripheral interface (SPI). The ADS1118
operates from a single power supply ranging from
2.0 V to 5.5 V.
The ADS1118 can perform conversions at rates up to
860 samples per second (SPS). A programmable
gain amplifier (PGA) is integrated in the ADS1118
that offers input ranges from as low as ±256 mV up to
the supply rails, allowing both large and small signals
to be measured with high resolution. The ADS1118
also features an input multiplexer (MUX) that provides
two differential or four single-ended inputs. The
ADS1118 can also function as a high-accuracy
temperature sensor. This temperature sensor can be
used for system-level temperature monitoring or cold
junction compensation for thermocouples.
The ADS1118 operates either in continuous
conversion mode or single-shot mode that
automatically powers down after a conversion.
Single-shot mode significantly reduces current
consumption during idle periods. The ADS1118 is
specified from –40°C to +125°C.
2V
1 MW _{500 W}
1 MW ^{500 W}
GND
0.1 mF _AIN0
1 mF
AIN1
0.1 mF
GND GND
2V
1 MW _{500 W}
1 MW ^{500 W}
GND
0.1 mF _AIN2
1 mF
AIN3
0.1 mF
GND GND
MUX
2V
VDD
0.1 mF
GND
Voltage
Reference
PGA
16-Bit DS
ADC
Device
SPI
Interface
SCLK
CS
DOUT/DRDY
DIN
GND
Oscillator
High Accuracy
Temp Sensor
GND
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.
SPI is a trademark of Motorola.
2
All other trademarks are the property of their respective owners.
3
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 © 2010–2013, Texas Instruments Incorporated