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MCP3553 Datasheet

  • MCP3553

  • 低功耗的單通道22 位Δ - Σ模數(shù)轉(zhuǎn)換器

  • 30頁

  • MICROCHIP   MICROCHIP

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MCP3551/3
Low-Power, Single-Channel 22-Bit Delta-Sigma ADCs
Features
鈥?22-bit ADC in Small 8-pin MSOP Package with
Automatic Internal Offset and Gain Calibration
鈥?Low-Output Noise of 2.5 碌V
RMS
with Effective
Resolution of 21.9 bits (MCP3551)
鈥?3 碌V Typical Offset Error
鈥?2 ppm Typical Full-Scale Error
鈥?6 ppm Maximum INL Error
鈥?Total Unadjusted Error Less Than 10 ppm
鈥?No Digital Filter Settling Time, Single-Command
Conversions through 3-wire SPI
鈩?/div>
Interface
鈥?Ultra-Low Conversion Current (MCP3551):
- 100 碌A(chǔ) typical (V
DD
= 2.7V)
- 120 碌A(chǔ) typical (V
DD
= 5.0V)
鈥?Differential Input with V
SS
to V
DD
Common Mode
Range
鈥?2.7V to 5.5V Single-Supply Operation
鈥?Extended Temperature Range:
- -40擄C to +125擄C
Description
The Microchip Technology Inc. MCP3551/3 devices
are 2.7V to 5.5V low-power, 22-bit Delta-Sigma
Analog-to-Digital Converters
(ADCs).
The devices offer
output noise as low as 2.5 碌V
RMS
, with a total
unadjusted error of 10 ppm. The family exhibits 6 ppm
Integral Non-Linearity (INL) error, 3 碌V offset error and
less than 2 ppm full-scale error. The MCP3551/3
devices provide high accuracy and low noise
performance
for
applications
where
sensor
measurements (such as pressure, temperature and
humidity) are performed. With the internal oscillator
and high oversampling rate, minimal external
components
are
required
for
high-accuracy
applications.
This product line has fully differential analog inputs,
making it compatible with a wide variety of sensor,
industrial control or process control applications.
The MCP3551/3 devices operate from -40擄C to +125擄C
and are available in the space-saving 8-pin MSOP and
SOIC packages.
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Weigh Scales
Direct Temperature Measurement
6-digit DVMs
Instrumentation
Data Acquisition
Strain Gauge Measurement
Package Types:
MCP3551/3
SOIC, MSOP
V
REF
1
V
IN
+ 2
V
IN
鈥?3
V
SS
4
V
SS
V
DD
8 V
DD
7 CS
6 SDO/RDY
5 SCK
Block Diagram
V
REF
Device Selection Table
SINC
4
V
IN
+
V
IN
-
Serial Interface
3rd-Order
螖危
ADC
Modulator
w/ Internal
Calibration
SCK
SDO
RDY
CS
Part
Number
MCP3551
MCP3553
Sample
Rate
13.75 sps
60 sps
Effective
Resolution
21.9 bits
20.6 bits
50/60 Hz
Rejection
50/60 Hz
(simultaneous)
N/A
Internal
Oscillator
V
DD
POR
漏
2005 Microchip Technology Inc.
DS21950B-page 1

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