Document Outline
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS(
- PACKAGE/ORDERING INFORMATION
- ELECTRICAL CHARACTERISTICS
- TYPICAL CHARACTERISTICS
- THEORY OF OPERATION
- ANALOG-TO-DIGITAL CONVERTER
- VOLTAGE REFERENCE
- OUTPUT CODE CALCULATION
- SELF-CALIBRATION
- CLOCK OSCILLATOR
- INPUT IMPEDANCE
- ALIASING
- USING THE ADS1110
- OPERATING MODES
- RESET AND POWER-UP
- I2C INTERFACE
- ADS1110 I2C ADDRESSES
- I2C GENERAL CALL
- I2C DATA RATES
- REGISTERS
- OUTPUT REGISTER
- CONFIGURATION REGISTER
- Bit 7: ST/DRDY\
- Bits 6-5: Reserved
- Bit 4: SC
- Bits 3-2: DR
- Bits 1-0: PGA
- READING FROM THE ADS1110
- WRITING TO THE ADS1110
- APPLICATIONS INFORMATION
- BASIC CONNECTIONS
- CONNECTING MULTIPLE DEVICES
- USING GPIO PORTS FOR I2C
- SINGLE-ENDED INPUTS
- LOW-SIDE CURRENT MONITOR
- ADVICE
SBAS276A - MARCH 2003 - REVISED NOVEMBER 2003
16-Bit ANALOG-TO-DIGITAL CONVERTER
with Onboard Reference
ADS1110
FEATURES
D
COMPLETE DATA ACQUISITION SYSTEM IN
A TINY SOT23-6 PACKAGE
D
ONBOARD REFERENCE:
Accuracy: 2.048V
0.05%
Drift: 5ppm/
C
D
ONBOARD PGA
D
ONBOARD OSCILLATOR
D
16-BITS NO MISSING CODES
D
INL: 0.01% of FSR max
D
CONTINUOUS SELF-CALIBRATION
D
SINGLE-CYCLE CONVERSION
D
PROGRAMMABLE DATA RATE: 15SPS TO
240SPS
D
I
2
C
INTERFACE--EIGHT AVAILABLE
ADDRESSES
D
POWER SUPPLY: 2.7V to 5.5V
D
LOW CURRENT CONSUMPTION: 240
A
APPLICATIONS
D
PORTABLE INSTRUMENTATION
D
INDUSTRIAL PROCESS CONTROL
D
SMART TRANSMITTERS
D
CONSUMER GOODS
D
FACTORY AUTOMATION
D
TEMPERATURE MEASUREMENT
DESCRIPTION
The ADS1110 is a precision, continuously self-calibrating
Analog-to-Digital (A/D) converter with differential inputs and
up to 16 bits of resolution in a small SOT23-6 package. The
onboard 2.048V reference provides an input range of
2.048V differentially. The ADS1110 uses an I
2
C-compatible
serial interface and operates from a single power supply
ranging from 2.7V to 5.5V.
The ADS1110 can perform conversions at rates of 15, 30, 60,
or 240 samples per second. The onboard programmable
gain amplifier (PGA), which offers gains of up to 8, allows
smaller signals to be measured with high resolution. In
single-conversion mode, the ADS1110 automatically powers
down after a conversion, greatly reducing current
consumption during idle periods.
The ADS1110 is designed for applications requiring
high-resolution measurement, where space and power
consumption are major considerations. Typical applications
include portable instrumentation, industrial process control,
and smart transmitters.
www.ti.com
Copyright
2003, Texas Instruments Incorporated
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.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
ADS1110
SBAS276A - MARCH 2003 - REVISED NOVEMBER 2003
www.ti.com
2
ABSOLUTE MAXIMUM RATINGS
(1)
VDD to GND
-0.3V to +6V
Input Current
100mA, Momentary
Input Current
10mA, Continuous
Voltage to GND, VIN+, VIN-
-0.3V to VDD + 0.3V
Voltage to GND, SDA, SCL
-0.5V to 6V
Maximum Junction Temperature
+150
C
Operating Temperature Range
-40
C to +125
C
Storage Temperature Range
-60
C to +150
C
Lead Temperature (soldering, 10s)
+300
C
(1) Stresses above those listed under "Absolute Maximum Ratings"
may cause permanent damage to the device. Exposure to
absolute maximum conditions for extended periods may affect
device reliability.
This integrated circuit can be damaged by ESD.
Texas Instruments recommends that all
integrated circuits be handled with appropriate
precautions. Failure to observe proper handling and
installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.
PACKAGE/ORDERING INFORMATION
PRODUCT
I2C
ADDRESS
PACKAGE-LEAD
PACKAGE
DESIGNATOR(1)
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER
TRANSPORT
MEDIA, QUANTITY
ADS1110
1001 000
SOT23-6
DBV
-40
C to +85
C
ED0
ADS1110A0IDBVT
Tape and Reel, 250
ADS1110
1001 000
SOT23-6
DBV
-40
C to +85
C
ED0
ADS1110A0IDBVR
Tape and Reel, 3000
ADS1110
1001 001
SOT23-6
DBV
-40
C to +85
C
ED1
ADS1110A1IDBVT
Tape and Reel, 250
ADS1110
1001 001
SOT23-6
DBV
-40
C to +85
C
ED1
ADS1110A1IDBVR
Tape and Reel, 3000
ADS1110
1001 010
SOT23-6
DBV
-40
C to +85
C
ED2
ADS1110A2IDBVT
Tape and Reel, 250
ADS1110
1001 010
SOT23-6
DBV
-40
C to +85
C
ED2
ADS1110A2IDBVR
Tape and Reel, 3000
ADS1110
1001 011
SOT23-6
DBV
-40
C to +85
C
ED3
ADS1110A3IDBVT
Tape and Reel, 250
ADS1110
1001 011
SOT23-6
DBV
-40
C to +85
C
ED3
ADS1110A3IDBVR
Tape and Reel, 3000
ADS1110
1001 100
SOT23-6
DBV
-40
C to +85
C
ED4
ADS1110A4IDBVT
Tape and Reel, 250
ADS1110
1001 100
SOT23-6
DBV
-40
C to +85
C
ED4
ADS1110A4IDBVR
Tape and Reel, 3000
ADS1110
1001 101
SOT23-6
DBV
-40
C to +85
C
ED5
ADS1110A5IDBVT
Tape and Reel, 250
ADS1110
1001 101
SOT23-6
DBV
-40
C to +85
C
ED5
ADS1110A5IDBVR
Tape and Reel, 3000
ADS1110
1001 110
SOT23-6
DBV
-40
C to +85
C
ED6
ADS1110A6IDBVT
Tape and Reel, 250
ADS1110
1001 110
SOT23-6
DBV
-40
C to +85
C
ED6
ADS1110A6IDBVR
Tape and Reel, 3000
ADS1110
1001 111
SOT23-6
DBV
-40
C to +85
C
ED7
ADS1110A7IDBVT
Tape and Reel, 250
ADS1110
1001 111
SOT23-6
DBV
-40
C to +85
C
ED7
ADS1110A7IDBVR
Tape and Reel, 3000
(1) For the most current specification and package information, refer to our web site at www.ti.com.
Top View
SOT23
ADS1110
SBAS276A - MARCH 2003 - REVISED NOVEMBER 2003
www.ti.com
3
ELECTRICAL CHARACTERISTICS
All specifications at -40
C to +85
C, VDD = 5V, and all PGAs, unless otherwise noted.
ADS1110
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUT
Full-Scale Input Voltage
(VIN+) - (VIN-)
2.048/PGA
V
Analog Input Voltage
VIN+ to GND or VIN- to GND
GND - 0.2
VDD + 0.2
V
Differential Input Impedance
2.8/PGA
M
Common-Mode Input Impedance
PGA = 1
3.5
M
PGA = 2
3.5
M
PGA = 4
1.8
M
PGA = 8
0.9
M
SYSTEM PERFORMANCE
Resolution and No Missing Codes
DR = 00
12
12
Bits
Resolution and No Missing Codes
DR = 01
14
14
Bits
DR = 10
15
15
Bits
DR = 11
16
16
Bits
Data Rate
DR = 00
180
240
308
SPS
Data Rate
DR = 01
45
60
77
SPS
DR = 10
22
30
39
SPS
DR = 11
11
15
20
SPS
Output Noise
See Typical Characteristic Curves
Integral Nonlinearity
DR = 11, PGA = 1, End Point Fit(1)
0.004
0.010
% of FSR
(2)
Offset Error
PGA = 1
1.2
8
mV
Offset Error
PGA = 2
0.7
4
mV
PGA = 4
0.5
2.5
mV
PGA = 8
0.4
1.5
mV
Offset Drift
PGA = 1
1.2
V/
C
Offset Drift
PGA = 2
0.6
V/
C
PGA = 4
0.3
V/
C
PGA = 8
0.3
V/
C
Offset vs VDD
PGA = 1
800
V/V
Offset vs VDD
PGA = 2
400
V/V
PGA = 4
200
V/V
PGA = 8
150
V/V
Gain Error(3)
0.05
0.40
%
PGA Gain Error Match(3)
Match Between Any Two PGA Gains
0.02
0.10
%
Gain Error Drift(3)
5
40
ppm/
C
Gain vs VDD
80
ppm/V
Common-Mode Rejection
At DC and PGA = 8
95
105
dB
Common-Mode Rejection
At DC and PGA = 1
100
dB
DIGITAL INPUT/OUTPUT
Logic Level
VIH
0.7
VDD
6
V
VIL
GND - 0.5
0.3
VDD
V
VOL
IOL = 3mA
GND
0.4
V
Input Leakage
IH
VIH = 5.5V
10
A
IL
VIL = GND
-10
A
POWER-SUPPLY REQUIREMENTS
Power-Supply Voltage
VDD
2.7
5.5
V
Supply Current
Power Down
0.05
2
A
Supply Current
Active Mode
240
350
A
Power Dissipation
VDD = 5.0V
1.2
1.75
mW
Power Dissipation
VDD = 3.0V
0.675
mW
(1) 99% of full-scale.
(2) FSR = full-scale range = 2
2.048V/PGA = 4.096V/PGA.
(3) Includes all errors from onboard PGA and reference.
ADS1110
SBAS276A - MARCH 2003 - REVISED NOVEMBER 2003
www.ti.com
4
TYPICAL CHARACTERISTICS
At TA = 25
C and VDD = 5V, unless otherwise noted.
ADS1110
SBAS276A - MARCH 2003 - REVISED NOVEMBER 2003
www.ti.com
5
TYPICAL CHARACTERISTICS (continued)
At TA = 25
C and VDD = 5V, unless otherwise noted.
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