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MCP3551T-E/MS 其他数据使用手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
AD转换器
封装:
MSOP-8
描述:
低功耗，单通道22位Δ -Σ模数转换器 Low-Power, Single-Channel 22-Bit Delta-Sigma ADCs
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MCP3551T-E/MS数据手册
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© 2007 Microchip Technology Inc. DS21950D-page 1
MCP3550/1/3
Features
• 22-bit ADC in Small 8-pin MSOP Package with
Automatic Internal Offset and Gain Calibration
• Low-Output Noise of 2.5 µV
RMS
with Effective
Resolution of 21.9 bits (MCP3550/1)
• 3 µV Typical Offset Error
• 2 ppm Typical Full-Scale Error
• 6 ppm Maximum INL Error
• Total Unadjusted Error Less Than 10 ppm
• No Digital Filter Settling Time, Single-Command
Conversions through 3-wire SPI Interface
• Ultra-Low Conversion Current (MCP3550/1):
-100µA typical (V
DD
= 2.7V)
-120µA typical (V
DD
= 5.0V)
• Differential Input with V
SS
to V
DD
Common Mode
Range
• 2.7V to 5.5V Single-Supply Operation
• Extended Temperature Range:
- -40°C to +125°C
Applications
• Weigh Scales
• Direct Temperature Measurement
• 6-digit DVMs
• Instrumentation
• Data Acquisition
• Strain Gauge Measurement
Block Diagram
Description
The Microchip Technology Inc. MCP3550/1/3 devices
are 2.7V to 5.5V low-power, 22-bit Delta-Sigma Ana-
log-to-Digital Converters (ADCs). The devices offer
output noise as low as 2.5 µV
RMS
, with a total
unadjusted error of 10 ppm. The family exhibits 6 ppm
Integral Non-Linearity (INL) error, 3 µV offset error and
less than 2 ppm full-scale error. The MCP3550/1/3
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 MCP3550/1/3 devices operate from -40°C to
+125°C and are available in the space-saving 8-pin
MSOP and SOIC packages.
Package Types:
Device Selection Table
V
SS
V
IN
+
V
IN
-
SCK
V
DD
SDO
CS
SINC
4
Internal
Serial Interface
V
REF
POR
Oscillator
3rd-Order
DS ADC
Modulator
w/ Internal
Calibration
V
DD
RDY
Part Number
Sample
Rate
Effective
Resolution
50/60 Hz
Rejection
MCP3550-50 12.5 sps 21.9 bits 50 Hz
MCP3550-60 15 sps 21.9 bits 60 Hz
MCP3551 13.75 sps 21.9 bits 50/60 Hz
(simultaneous)
MCP3553 60 sps 20.6 bits N/A
V
IN
–
V
IN
+
MCP3550/1/3
V
SS
CS
SDO/RDY
1
2
3
4
8
7
6
5
SCK
V
DD
V
REF
SOIC, MSOP
Low-Power, Single-Channel 22-Bit Delta-Sigma ADCs
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