ADS1100
AD0
SBAS239B – MAY 2002 – REVISED NOVEMBER 2003
Self-Calibrating, 16-Bit
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q
COMPLETE DATA ACQUISITION SYSTEM IN A
TINY SOT23-6 PACKAGE
q
16-BITS NO MISSING CODES
q
INL: 0.0125% of FSR MAX
q
CONTINUOUS SELF-CALIBRATION
q
SINGLE-CYCLE CONVERSION
q
PROGRAMMABLE GAIN AMPLIFIER
GAIN = 1, 2, 4, OR 8
q
LOW NOISE: 4
µ
Vp-p
q
PROGRAMMABLE DATA RATE: 8SPS to 128SPS
q
INTERNAL SYSTEM CLOCK
q
I
2
C
TM
INTERFACE
q
POWER SUPPLY: 2.7V to 5.5V
q
LOW CURRENT CONSUMPTION: 90
µ
A
q
AVAILABLE IN EIGHT DIFFERENT ADDRESSES
DESCRIPTION
The ADS1100 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.
Conversions are performed ratiometrically, using the power
supply as the reference voltage. The ADS1100 uses an
I
2
C-compatible serial interface and operates from a single
power supply ranging from 2.7V to 5.5V.
The ADS1100 can perform conversions at rates of 8, 16, 32,
or 128 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 ADS1100 automatically powers
down after a conversion, greatly reducing current consump-
tion during idle periods.
The ADS1100 is designed for applications requiring high-
resolution measurement, where space and power consump-
tion are major considerations. Typical applications include
portable instrumentation, industrial process control, and smart
transmitters.
APPLICATIONS
q
PORTABLE INSTRUMENTATION
q
INDUSTRIAL PROCESS CONTROL
q
SMART TRANSMITTERS
q
CONSUMER GOODS
q
FACTORY AUTOMATION
q
TEMPERATURE MEASUREMENT
I
2
C is a registered trademark of Philips Incorporated.
V
IN+
V
IN–
A = 1, 2, 4, or 8
∆Σ
A/D
Converter
SCL
SDA
V
DD
Clock
Oscillator
GND
PGA
I
2
C
Interface
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.
Copyright © 2002-2003, Texas Instruments Incorporated
www.ti.com
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ........................................................................... –0.3V to +6V
Input Current ............................................................... 100mA, Momentary
Input Current ................................................................. 10mA, Continuous
Voltage to GND, V
IN+
, V
IN– ..........................................................
–0.3V to V
DD
+ 0.3V
Voltage to GND, SDA, SCL ..................................................... –0.5V to 6V
Maximum Junction Temperature ................................................... +150°C
Operating Temperature .................................................. –40°C to +125°C
Storage Temperature ...................................................... –60°C to +150°C
Lead Temperature (soldering, 10s) ............................................... +300°C
NOTE: (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.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be handled
with appropriate precautions. Failure to observe proper han-
dling and installation procedures can cause damage.
ESD damage can range from subtle performance degrada-
tion 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
PACKAGE
DESIGNATOR
(1)
DBV
SPECIFIED
TEMPERATURE
RANGE
–40°C to +85°C
PACKAGE
MARKING
AD0
ORDERING
NUMBER
ADS1100A0IDBVT
ADS1100A0IDBVR
ADS1100A1IDBVT
ADS1100A1IDBVR
ADS1100A2IDBVT
ADS1100A2IDBVR
ADS1100A3IDBVT
ADS1100A3IDBVR
ADS1100A4IDBVT
ADS1100A4IDBVR
ADS1100A5IDBVT
ADS1100A5IDBVR
ADS1100A6IDBVT
ADS1100A6IDBVR
ADS1100A7IDBVT
ADS1100A7IDBVR
TRANSPORT
MEDIA, QUANTITY
Tape and Reel, 250
Tape and Reel, 3000
Tape and Reel, 250
Tape and Reel, 3000
Tape and Reel, 250
Tape and Reel, 3000
Tape and Reel, 250
Tape and Reel, 3000
Tape and Reel, 250
Tape and Reel, 3000
Tape and Reel, 250
Tape and Reel, 3000
Tape and Reel, 250
Tape and Reel, 3000
Tape and Reel, 250
Tape and Reel, 3000
PRODUCT
ADS1100
I
2
C ADDRESS
1001 000
PACKAGE-LEAD
SOT23-6
"
ADS1100
"
1001 001
"
SOT23-6
"
DBV
"
–40°C to +85°C
"
AD1
"
ADS1100
"
1001 010
"
SOT23-6
"
DBV
"
–40°C to +85°C
"
AD2
"
ADS1100
"
1001 011
"
SOT23-6
"
DBV
"
–40°C to +85°C
"
AD3
"
ADS1100
"
1001 100
"
SOT23-6
"
DBV
"
–40°C to +85°C
"
AD4
"
ADS1100
"
1001 101
"
SOT23-6
"
DBV
"
–40°C to +85°C
"
AD5
"
ADS1100
"
1001 110
"
SOT23-6
"
DBV
"
–40°C to +85°C
"
AD6
"
ADS1100
"
1001 111
"
SOT23-6
"
DBV
"
–40°C to +85°C
"
AD7
"
"
"
"
"
"
NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com.
PIN CONFIGURATION
Top View
V
IN–
V
DD
SDA
6
5
4
SOT23
AD0
1
2
3
V
IN+
GND SCL
NOTE: Marking text direction indicates pin 1. Marking text depends on I
2
C
address; see ordering table. Marking for I
2
C address 1001000 shown.
2
ADS1100
www.ti.com
SBAS239B
ELECTRICAL CHARACTERISTICS
All specifications at –40°C to +85°C, V
DD
= 5V, GND = 0V, and all PGAs, unless otherwise noted.
ADS1100
PARAMETER
ANALOG INPUT
Full-Scale Input Voltage
Analog Input Voltage
Differential Input Impedance
Common-Mode Input Impedance
SYSTEM PERFORMANCE
Resolution and No Missing Codes
CONDITIONS
MIN
TYP
±V
DD
/PGA
GND – 0.2
2.4/PGA
8
DR
DR
DR
DR
DR
DR
DR
DR
=
=
=
=
=
=
=
=
00
01
10
11
00
01
10
11
12
14
15
16
104
26
13
6.5
12
14
15
16
184
46
23
11.5
±0.0125
±5/PGA
8
4
2
2
0.1
V
DD
+ 0.2
MAX
UNITS
(V
IN+
) – (V
IN–
)
V
IN+
, V
IN–
to GND
V
V
MΩ
MΩ
Bits
Bits
Bits
Bits
SPS
SPS
SPS
SPS
% of FSR
(2)
mV
µV/°C
µV/°C
µV/°C
µV/°C
%
ppm/°C
dB
dB
Conversion Rate
128
32
16
8
±0.003
±2.5/PGA
1.5
1.0
0.7
0.6
0.01
2
100
85
Output Noise
Integral Nonlinearity
Offset Error
Offset Drift
See Typical Characteristic Curves
DR = 11, PGA = 1, End Point Fit
(1)
PGA
PGA
PGA
PGA
=
=
=
=
1
2
4
8
Gain Error
Gain Error Drift
Common-Mode Rejection
DIGITAL INPUT/OUTPUT
Logic Level
V
IH
V
IL
V
OL
Input Leakage
I
IH
I
IL
POWER-SUPPLY REQUIREMENTS
Power-Supply Voltage
Supply Current
Power Dissipation
At DC, PGA = 8
At DC, PGA = 1
94
I
OL
= 3mA
V
IH
= 5.5V
V
IL
= GND
V
DD
Power Down
Active Mode
V
DD
= 5.0V
V
DD
= 3.0V
0.7 • V
DD
GND – 0.5
GND
6
0.3 • V
DD
0.4
10
V
V
V
µA
µA
V
µA
µA
µW
µW
–10
2.7
0.05
90
450
210
5.5
2
150
750
NOTES: (1) 99% of full-scale. (2) FSR = Full-Scale Range = 2 • V
DD
/PGA.
ADS1100
SBAS239B
www.ti.com
3
TYPICAL CHARACTERISTICS
At T
A
= 25°C and V
DD
= 5V, unless otherwise noted.
SUPPLY CURRENT vs TEMPERATURE
120
250
225
100
I
VDD
(µA)
SUPPLY CURRENT vs I
2
C BUS FREQUENCY
V
DD
= 5V
200
I
VDD
(µA)
175
150
125
125°C
25°C
80
60
V
DD
= 2.7V
40
–60 –40 –20
0
20
40
60
80
100 120
140
Temperature (°C)
100
–40°C
75
50
10
100
1k
10k
I
2
C Bus Frequency (kHz)
OFFSET ERROR vs TEMPERATURE
2.0
V
DD
= 5V
1.0
Offset Error (mV)
PGA = 8
0.0
PGA = 4
PGA = 2
PGA = 1
1.0
2.0
OFFSET ERROR vs TEMPERATURE
V
DD
= 2.7V
Offset Error (mV)
PGA = 8
0.0
PGA = 4
PGA = 2
PGA = 1
–1.0
–1.0
–2.0
–60 –40 –20
0
20
40
60
80
100 120
140
Temperature (°C)
–2.0
–60 –40 –20
0
20
40
60
80
100 120
140
Temperature (°C)
GAIN ERROR vs TEMPERATURE
0.04
V
DD
= 5V
0.03
0.02
Gain Error (%)
0.01
0.00
–0.01
–0.02
PGA = 2
–0.03
–0.04
–60 –40
–20
0
20
40
60
80
100 120 140
Temperature (°C)
PGA = 8
PGA = 4
PGA = 1
GAIN ERROR vs TEMPERATURE
0.010
V
DD
= 2.7V
0.005
PGA = 4
PGA = 8
Gain Error (%)
0.000
–0.005
–0.010
–0.015
–0.020
–60 –40 –20
0
20
40
60
80
100 120
140
Temperature (°C)
PGA = 1
PGA = 2
4
ADS1100
www.ti.com
SBAS239B
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= 25°C and V
DD
= 5V, unless otherwise noted.
TOTAL ERROR vs INPUT SIGNAL
0.0
Integral Nonlinearity (% of FSR)
INTEGRAL NONLINEARITY vs SUPPLY VOLTAGE
0.016
PGA = 8
PGA = 4
PGA = 2
PGA = 1
PGA = 8
–0.5
PGA = 4
Total Error (mV)
0.014
0.012
0.010
0.008
0.006
0.004
0.002
0.000
–1.0
PGA = 2
–1.5
–2.0
PGA = 1
–2.5
–100
–75
–50
–25
0
25
Data Rate = 8SPS
50
75
100
2.5
3.0
3.5
4.0
V
DD
(V)
4.5
5.0
5.5
Input Signal (% of Full-Scale)
INTEGRAL NONLINEARITY vs TEMPERATURE
0.05
Integral Nonlinearity (% of FSR)
NOISE vs INPUT SIGNAL
20
Data Rate = 8SPS
PGA = 8
PGA =1
0.04
Noise (p-p, % of LSB)
15
PGA = 4
PGA = 2
PGA = 1
0.03
V
DD
= 2.7V
10
0.02
V
DD
= 3.5V
V
DD
= 5V
0.01
5
0.00
–60 –40 –20
0
20
40
60
80
100 120
140
Temperature (°C)
0
0
20
40
60
80
100
Input Signal (% of Full-Scale)
NOISE vs SUPPLY VOLTAGE
30
25
Noise (p-p, % of LSB)
NOISE vs TEMPERATURE
25
Data Rate = 8SPS
PGA = 8
Noise (p-p, % of LSB)
PGA = 8
20
PGA = 4
15
PGA = 2
10
5
Data Rate = 8SPS
0
2.5
3.0
3.5
4.0
V
DD
(V)
4.5
5.0
5.5
PGA = 1
20
15
10
5
–60
–40
–20
0
20
40
60
80
100
120 140
Temperature (°C)
ADS1100
SBAS239B
www.ti.com
5
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