ꢚ
ꢗ
ꢘ
ꢌ
ꢔ
ꢑ
ꢛ
SBAS318 − JUNE 2004
ꢀ
ꢁ
ꢂ
ꢁ
ꢃ
ꢄ
ꢐ
ꢁ
ꢅ
ꢂ
ꢃ
ꢁ
ꢆ
ꢄ
ꢇ
ꢃ
ꢃ
ꢈ
ꢅ
ꢂ
ꢀ
ꢈ
ꢉ
ꢊ
ꢇ
ꢃ
ꢈ
ꢋ
ꢈ
ꢅ
ꢂ
ꢌ
ꢍ
ꢎ
ꢏ
ꢂ
ꢐ
ꢌ
ꢑ
ꢀ
ꢒ
ꢓ
ꢔ
ꢅ
ꢕ
ꢍ
ꢖ
ꢃ
ꢕ
ꢈ
ꢃ
ꢐ
ꢗ
ꢈ
ꢆ
ꢂ
ꢉ
ꢍ
ꢘ
ꢏ
ꢙ
ꢋ
ꢉ
ꢀ
ꢁ
ꢕ
ꢇ
ꢆ
ꢉ
ꢂ
ꢁ
ꢃ
FEATURES
DESCRIPTION
D
D
D
D
D
D
16-Bit Resolution
The ADS1203 is a delta-sigma (∆Σ) modulator with a
95dB dynamic range, operating from a single +5V
supply. The differential inputs are ideal for direct
connection to transducers or low-level signals. With the
appropriate digital filter and modulator rate, the device
can be used to achieve 16-bit analog-to-digital (A/D)
conversion with no missing codes. An effective
resolution of 14 bits or SNR of 85dB (typical) can be
maintained with a digital filter bandwidth of 40kHz at a
modulator rate of 10MHz. The ADS1203 is designed for
use in medium- to high-resolution measurement
applications including current measurements, smart
transmitters, industrial process control, weigh scales,
chromatography, and portable instrumentation. It is
available in an 8-lead TSSOP package. A 16-pin QFN
(3x3) package will be available soon.
14-Bit Linearity
250mV Input Range with Single +5V Supply
1% Internal Reference Voltage
1% Gain Error
Flexible Serial Interface with Four Different
Modes
D
Implemented Twinned Binary Coding as
Split-Phase or Manchester Coding for
One-Line Interfacing
D
Operating Temperature Range:
−40°C to +85°C
APPLICATIONS
D
D
D
D
D
D
D
D
Motor Control
Current Measurement
Industrial Process Control
Instrumentation
VIN
+
MDAT
2nd−Order
∆Σ
Modulator
−
VIN
MCLK
Smart Transmitters
Portable Instruments
Weight Scales
Interface
Circuit
RC Oscillator
20MHz
Pressure Transducers
VDD
M0
M1
GND
Reference
Voltage
2.5V
Buffer
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.
ꢜꢝ ꢖ ꢗꢞ ꢄ ꢟꢠ ꢖꢡ ꢗ ꢚꢟꢚ ꢏꢅ ꢢꢁ ꢃ ꢋꢉ ꢂꢏꢁꢅ ꢏꢊ ꢣꢇ ꢃ ꢃ ꢈꢅꢂ ꢉꢊ ꢁꢢ ꢤꢇꢥ ꢆꢏꢣ ꢉꢂꢏ ꢁꢅ ꢕꢉ ꢂꢈꢦ ꢜꢃ ꢁꢕꢇ ꢣꢂꢊ
ꢣ ꢁꢅ ꢢꢁꢃ ꢋ ꢂꢁ ꢊ ꢤꢈ ꢣ ꢏ ꢢꢏ ꢣ ꢉ ꢂꢏ ꢁꢅꢊ ꢤ ꢈꢃ ꢂꢧꢈ ꢂꢈ ꢃ ꢋꢊ ꢁꢢ ꢟꢈꢨ ꢉꢊ ꢠꢅꢊ ꢂꢃ ꢇꢋ ꢈꢅꢂ ꢊ ꢊꢂ ꢉꢅꢕ ꢉꢃ ꢕ ꢩ ꢉꢃ ꢃ ꢉ ꢅꢂꢪꢦ
ꢜꢃ ꢁ ꢕꢇꢣ ꢂ ꢏꢁ ꢅ ꢤꢃ ꢁ ꢣ ꢈ ꢊ ꢊ ꢏꢅ ꢙ ꢕꢁ ꢈ ꢊ ꢅꢁꢂ ꢅꢈ ꢣꢈ ꢊꢊ ꢉꢃ ꢏꢆ ꢪ ꢏꢅꢣ ꢆꢇꢕ ꢈ ꢂꢈ ꢊꢂꢏ ꢅꢙ ꢁꢢ ꢉꢆ ꢆ ꢤꢉ ꢃ ꢉꢋ ꢈꢂꢈ ꢃ ꢊꢦ
Copyright 2004, Texas Instruments Incorporated
www.ti.com