參數(shù)資料
型號： MCP3422A0T-E/SN
廠商： Microchip Technology
文件頁數(shù)： 1/58頁
文件大?。?/td> 0K
描述： IC ADC 18BIT 3.75SPS 2CH 8-SOIC
產(chǎn)品培訓模塊： MCP3901 Analog Front End
標準包裝： 3,300
位數(shù)： 18
采樣率（每秒）： 3.75
數(shù)據(jù)接口： I²C，串行
轉換器數(shù)目： 1
電壓電源： 單電源
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 8-SOIC（0.154"，3.90mm 寬）
供應商設備封裝： 8-SOICN
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 4 個單端，雙極；2 個差分，雙極
配用： MCP3422EV-ND - BOARD EVAL MCP3422 PICKIT SERIAL
其它名稱： MCP3422A0T-E/SNTR
2009 Microchip Technology Inc.
DS22088C-page 1
MCP3422/3/4
Features
18-bit
ΔΣ ADC with Differential Inputs:
- 2 channels: MCP3422 and MCP3423
- 4 channels: MCP3424
Differential Input Full Scale Range: -VREF to
+VREF
Self Calibration of Internal Offset and Gain per
Each Conversion
On-Board Voltage Reference (VREF):
- Accuracy: 2.048V ± 0.05%
- Drift: 15 ppm/°C
On-Board Programmable Gain Amplifier (PGA):
- Gains of 1, 2, 4 or 8
INL: 10 ppm of Full Scale Range
Programmable Data Rate Options:
- 3.75 SPS (18 bits)
- 15 SPS (16 bits)
- 60 SPS (14 bits)
- 240 SPS (12 bits)
One-Shot or Continuous Conversion Options
Low Current Consumption:
- 135 A typical
(VDD= 3V, Continuous Conversion)
- 36 A typical
(VDD= 3V, One-Shot Conversion with 1 SPS)
On-Board Oscillator
I2C Interface:
- Standard, Fast and High Speed Modes
- User configurable two external address pins
for MCP3423 and MCP3424
Single Supply Operation: 2.7V to 5.5V
Extended Temperature Range: -40°C to +125°C
Typical Applications
Portable Instrumentation and Consumer Goods
Temperature Sensing with RTD, Thermistor, and
Thermocouple
Bridge Sensing for Pressure, Strain, and Force
Weigh Scales
Battery Fuel Gauges
Factory Automation Equipment
Description
The MCP3422, MCP3423 and MCP3424 devices
(MCP3422/3/4) are the low noise and high accuracy
18-Bit delta-sigma analog-to-digital (
ΔΣ A/D) converter
family members of the MCP342X series from Microchip
Technology Inc. These devices can convert analog
inputs to digital codes with up to 18 bits of resolution.
The on-board 2.048V reference voltage enables an
input range of ± 2.048V differentially (full scale
range = 4.096V/PGA).
These devices can output analog-to-digital conversion
results at rates of 3.75, 15, 60, or 240 samples per
second
depending
on
the
user
controllable
configuration bit settings using the two-wire I2C serial
interface.
During
each
conversion,
the
device
calibrates offset and gain errors automatically. This
provides accurate conversion results from conversion
to conversion over variations in temperature and power
supply fluctuation.
The user can select the PGA gain of x1, x2, x4, or x8
before the analog-to-digital conversion takes place.
This allows the MCP3422/3/4 devices to convert a very
weak input signal with high resolution.
The MCP3422/3/4 devices have two conversion
modes: (a) One-Shot Conversion mode and (b)
Continuous Conversion mode. In One-Shot conversion
mode, the device performs a single conversion and
enters a low current standby mode automatically until it
receives another conversion command. This reduces
current consumption greatly during idle periods. In
Continuous conversion mode, the conversion takes
place continuously at the set conversion speed. The
device updates its output buffer with the most recent
conversion data.
The devices operate from a single 2.7V to 5.5V power
supply and have a two-wire I2C compatible serial
interface for a standard (100 kHz), fast (400 kHz), or
high-speed (3.4 MHz) mode.
The I2C address bits for the MCP3423 and MCP3424
are selected by using two external I2C address
selection pins (Adr0 and Adr1). The user can configure
the device to one of eight available addresses by
connecting these two address selection pins to VDD,
VSS or float. The I
2C address bits of the MCP3422 are
programmed at the factory during production.
18-Bit, Multi-Channel
ΔΣ Analog-to-Digital Converter with
I2C Interface and On-Board Reference
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