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PDF ADS1100IDBVR Data sheet ( Hoja de datos )
| Número de pieza | ADS1100IDBVR | |
| Descripción | Self-Calibrating/ 16-Bit ANALOG-TO-DIGITAL CONVERTER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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ADS1100
BAAI
SBAS239 – MAY 2002
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: 4µVp-p
q PROGRAMMABLE DATA RATE: 8SPS to 128SPS
q INTERNAL SYSTEM CLOCK
q I2CTM INTERFACE
q POWER SUPPLY: 2.7V TO 5.5V
q LOW CURRENT CONSUMPTION: 90µA
APPLICATIONS
q PORTABLE INSTRUMENTATION
q INDUSTRIAL PROCESS CONTROL
q SMART TRANSMITTERS
q CONSUMER GOODS
q FACTORY AUTOMATION
q TEMPERATURE MEASUREMENT
I2C is a registered trademark of Philips Incorporated.
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
I2C-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, 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 consumption
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.
A = 1, 2, 4, or 8
VIN+
VIN–
PGA
∆Σ A/D
Converter
I2C
Interface
Clock
Oscillator
SCL
SDA
VDD
GND
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright © 2002, Texas Instruments Incorporated
1 page  
TYPICAL CHARACTERISTICS
At TA = 25°C, VDD = 5V, unless otherwise noted.
0.0
–0.5
–1.0
–1.5
TOTAL ERROR vs INPUT SIGNAL
PGA = 8
PGA = 4
PGA = 2
–2.0
–2.5
–100 –75
PGA = 1
Data Rate = 8SPS
–50 –25 0 25 50
Input Signal (% of Full-Scale)
75 100
0.016
0.014
0.012
0.010
0.008
0.006
0.004
0.002
0.000
2.5
INTEGRAL NONLINEARITY vs
SUPPLY VOLTAGE
PGA = 8
PGA = 4
PGA = 2
PGA = 1
3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
0.05
0.04
INTEGRAL NONLINEARITY vs TEMPERATURE
PGA =1
0.03
0.02
0.01
VDD = 2.7V
VDD = 3.5V
VDD = 5V
0.00
–60 –40 –20
0 20 40 60 80 100 120 140
Temperature (°C)
NOISE vs INPUT SIGNAL
20
Data Rate = 8SPS
PGA = 8
15
PGA = 4
PGA = 2
10
PGA = 1
5
0
0 20 40 60 80 100
Input Signal (% of Full-Scale)
NOISE vs SUPPLY VOLTAGE
30
25
PGA = 8
20
PGA = 4
15
PGA = 2
10
5
Data Rate = 8SPS
0
2.5 3.0 3.5
4.0
VDD (V)
PGA = 1
4.5 5.0
5.5
NOISE vs TEMPERATURE
25
Data Rate = 8SPS
PGA = 8
20
15
10
5
–60 –40 –20
0 20 40 60 80 100 120 140
Temperature (°C)
ADS1100
SBAS239
www.ti.com
5
5 Page 
Reading more than three bytes from the ADS1100 has no
effect. All of the bytes beginning with the fourth will be FFH.
A timing diagram for an ADS1100 read operation is shown in
Figure 2.
WRITING TO THE ADS1100
You can write new contents into the configuration register
(you cannot change the contents of the output register). To
do this, address the ADS1100 for writing, and write one byte
to it. This byte is written into the configuration register.
Writing more than one byte to the ADS1100 has no effect.
The ADS1100 will ignore any bytes sent to it after the first
one, and it will only acknowledge the first byte.
A timing diagram for an ADS1100 write operation is shown in
Figure 3.
SCL
1
91
9
…
SDA
1
Start By
Master
0 0 1 A2 A1 A0 R/W
D15 D14 D13 D12 D11 D10 D9 D8
Frame 1: I2C Slave Address Byte
ACK By
ADS1100
From
ADS1100
Frame 2: Output Register Upper Byte
…
ACK By
Master
SCL …
(Continued)
1
91
9
SDA …
(Continued)
D7 D6 D5 D4 D3 D2 D1 D0
ST/
BSY
From
ADS1100
ACK By
Master
Frame 3: Output Register Lower Byte
0 0 SC DR1 DR0 PGA1 PGA0
From
ADS1100
Frame 4: Configuration Register
(Optional)
ACK By
Master
Stop By
Master
FIGURE 2. Timing Diagram for Reading From the ADS1100.
1
SCL
91
9
SDA
1
Start By
Master
0 0 1 A2 A1 A0 R/W
ST/
BSY
ACK By
ADS1100
Frame 1: I2C Slave Address Byte
0
0 SC DR1 DR0 PGA1 PGA0
ACK By
ADS1100
Frame 2: Configuration Register
Stop By
Master
FIGURE 3. Timing Diagram for Writing to the ADS1100.
ADS1100
SBAS239
www.ti.com
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ADS1100IDBVR.PDF ] | |
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