SBAS301A − OCTOBER 2003 − REVISED JUNE 2004
C0070C0111C0117C0114 C0049C0262C0066C0105C0116C0044 C0049C0048C0077C0072C0122C0044 C0050C0110C0100C0262C0079C0114C0100C0101C0114C0044
C0068C0101C0108C0116C0097C0262C0083C0105C0103C0109C0097 C0077C0111C0100C0117C0108C0097C0116C0111C0114C0115
C0065C0068C0083C0049C0050C0048C0052
FEATURES
C0068 16-Bit Resolution
C0068 14-Bit Linearity
C0068 Resolution/Speed Trade-Off:
10-Bit Effective Resolution with 10µs Signal
Delay (12-Bit with 19µs)
C0068 ±2.5V Input Range at 2.5V
C0068 Internal Reference Voltage: 2%
C0068 Gain Error: 0.5%
C0068 Four Independent Delta-Sigma Modulators
C0068 Four Input Reference Buffers
C0068 Onboard 20MHz Oscillator
C0068 Selectable Internal or External Clock
C0068 Operating Temperature Range:
−40°C to +85°C
C0068 QFN-32 (5x5) Package
APPLICATIONS
C0068 Motor Control
C0068 Current Measurement
C0068 Industrial Process Control
C0068 Instrumentation
C0068 Smart Transmitters
C0068 Portable Instruments
C0068 Weight Scales
C0068 Pressure Transducers
DESCRIPTION
The ADS1204 is a four-channel, high-performance device,
with four delta-sigma (∆Σ) modulators with 100dB dynamic
range, operating from a single +5V supply. The differential
inputs are ideal for direct connection to transducers in an
industrial environment. 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
code. Effective resolution of 12 bits can be obtained with
a digital filter data rate of 160kHz at a modulator rate of
10MHz. The ADS1204 is designed for use in medium- to
high-resolution measurement applications including
current measurements, smart transmitters, industrial
process control, weight scales, chromatography, and
portable instrumentation. It is available in a QFN-32 (5x5)
package.
2nd−Order
∆Σ Modulator
CH A+
AV
DD
CH A−
Output
Interface
Circuit
RC
Oscillator
20MHz
Out EN
Clock
Select
Divider
REFIN A
Reference
Voltage
2.5V
REFOUT
OUT A
OUT B
OUT C
OUT D
CLKIN
AGND BGND
BV
DD
CLKOUT
CLKSEL
2nd−Order
∆Σ Modulator
CH B+
CH B−
REFIN B
2nd−Order
∆Σ Modulator
CH C+
CH C−
REFIN C
2nd−Order
∆Σ Modulator
CH D+
CH D−
REFIN D
C0080C0082C0079C0068C0085C0067C0084C0073C0079C0078 C0068C0065C0084C0065 C0105C0110C0102C0111C0114C0109C0097C0116C0105C0111C0110 C0105C0115 C0099C0117C0114C0114C0101C0110C0116 C0097C0115 C0111C0102 C0112C0117C0098C0108C0105C0099C0097C0116C0105C0111C0110 C0100C0097C0116C0101C0046 C0080C0114C0111C0100C0117C0099C0116C0115
C0099C0111C0110C0102C0111C0114C0109 C0116C0111 C0115C0112C0101C0099C0105C0102C0105C0099C0097C0116C0105C0111C0110C0115 C0112C0101C0114 C0116C0104C0101 C0116C0101C0114C0109C0115 C0111C0102 C0084C0101C0120C0097C0115 C0073C0110C0115C0116C0114C0117C0109C0101C0110C0116C0115 C0115C0116C0097C0110C0100C0097C0114C0100 C0119C0097C0114C0114C0097C0110C0116C0121C0046
C0080C0114C0111C0100C0117C0099C0116C0105C0111C0110 C0112C0114C0111C0099C0101C0115C0115C0105C0110C0103 C0100C0111C0101C0115 C0110C0111C0116 C0110C0101C0099C0101C0115C0115C0097C0114C0105C0108C0121 C0105C0110C0099C0108C0117C0100C0101 C0116C0101C0115C0116C0105C0110C0103 C0111C0102 C0097C0108C0108 C0112C0097C0114C0097C0109C0101C0116C0101C0114C0115C0046
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