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ADS1220IPWR bảng dữ liệu(PDF) 1 Page - Texas Instruments

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ADS1220IPWR bảng dữ liệu(HTML) 1 Page - Texas Instruments

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3.3 V
3.3 V
Thermocouple
0.1 2F
3.3 V
0.1 2F
Low Drift
Oscillator
Reference
Mux
Precision
Temp Sensor
AIN0
AIN1
AIN2
AIN3
SCLK
CS
AVDD
AVSS
DOUT/DRDY
DIN
ADS1220
DRDY
DGND
REFP0
REFN0
Internal
Reference
CLK
10 A to
1.5 mA
Mux
DVDD
PGA
24-bit
ûADC
Digital Filter
and
SPI
Interface
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
Reference
Design
ADS1220
SBAS501B – MAY 2013 – REVISED FEBRUARY 2015
ADS1220 Low-Power, Low-Noise, 24-Bit, ADC for Small-Signal Sensors
1 Features
3 Description
The ADS1220 is a precision, 24-bit, analog-to-digital
1
Low Current Consumption:
converter (ADC) that offers many integrated features
As Low as 120
μA (typ) in Duty-Cycle Mode
to reduce system cost and component count in
Wide Supply Range: 2.3 V to 5.5 V
applications measuring small sensor signals. The
Programmable Gain: 1 V/V to 128 V/V
device features two differential or four single-ended
inputs through a flexible input multiplexer (MUX), a
Programmable Data Rates: Up to 2 kSPS
low-noise, programmable gain amplifier (PGA), two
Up to 20-Bits Effective Resolution
programmable excitation current sources, a voltage
Simultaneous 50-Hz and 60-Hz Rejection at
reference, an oscillator, a low-side switch, and a
20 SPS with Single-Cycle Settling Digital Filter
precision temperature sensor.
Two Differential or Four Single-Ended Inputs
The device can perform conversions at data rates up
Dual Matched Programmable Current Sources:
to 2000 samples-per-second (SPS) with single-cycle
settling.
At
20
SPS,
the
digital
filter
offers
10
μA to 1.5 mA
simultaneous 50-Hz and 60-Hz rejection for noisy
Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
industrial applications. The internal PGA offers gains
Internal 2% Accurate Oscillator
up to 128 V/V. This PGA makes the ADS1220 ideally-
Internal Temperature Sensor:
suited
for
applications
measuring
small
sensor
signals, such as resistance temperature detectors
0.5°C (typ) Accuracy
(RTDs), thermocouples, thermistors, and resistive
SPI™-Compatible Interface (Mode 1)
bridge sensors. The device supports measurements
Package: 3.5-mm × 3.5-mm × 0.9-mm VQFN
of pseudo- or fully-differential signals when using the
PGA. Alternatively, the device can be configured to
2 Applications
bypass the internal PGA while still providing high
input impedance and gains up to 4 V/V, allowing for
Temperature Sensor Measurements:
single-ended measurements.
Thermistors
Power consumption is as low as 120 µA when
Thermocouples
operating in duty-cycle mode with the PGA disabled.
Resistance Temperature Detectors (RTDs):
The ADS1220 is offered in a leadless VQFN-16 or a
2-, 3-, or 4-Wire Types
TSSOP-16
package
and
is
specified
over
a
temperature range of –40°C to +125°C.
Resistive Bridge Sensor Measurements:
Pressure Sensors
Device Information(1)
Strain Gauges
PART NUMBER
PACKAGE
BODY SIZE (NOM)
Weigh Scales
VQFN (16)
3.50 mm × 3.50 mm
ADS1220
Portable Instrumentation
TSSOP (16)
5.00 mm × 4.40 mm
Factory Automation and Process Control
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
K-Type Thermocouple Measurement
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.


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