ADS1203
SBAS318 − JUNE 2004
Motor Control Current Measurement
1 Bit, 10MHz, 2nd Order, Delta Sigma Modulator
FEATURES
D
16-Bit Resolution
D
14-Bit Linearity
D
±250mV
Input Range with Single +5V Supply
D
1% Internal Reference Voltage
D
1% Gain Error
D
Flexible Serial Interface with Four Different
Modes
DESCRIPTION
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.
D
Implemented Twinned Binary Coding as
D
Split-Phase or Manchester Coding for
One-Line Interfacing
Operating Temperature Range:
−40°C to +85°C
APPLICATIONS
D
Motor Control
D
Current Measurement
D
Industrial Process Control
D
Instrumentation
D
Smart Transmitters
D
Portable Instruments
D
Weight Scales
D
Pressure Transducers
V
IN
+
V
IN
−
2nd−Order
∆Σ
Modulator
MDAT
MCLK
V
DD
GND
Buffer
RC Oscillator
20MHz
Interface
Circuit
M0
M1
Reference
Voltage
2.5V
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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
2004, Texas Instruments Incorporated
www.ti.com
BURR-BROWN [ BURR-BROWN CORPORATION ]
