參數(shù)資料
型號(hào): MCP3421A0T-E/OT
廠商: Microchip Technology
文件頁(yè)數(shù): 2/30頁(yè)
文件大?。?/td> 0K
描述: IC ADC 18BIT 3.75SPS 1CH SOT23-6
標(biāo)準(zhǔn)包裝: 1
位數(shù): 18
采樣率(每秒): 3.75
數(shù)據(jù)接口: I²C,串行
轉(zhuǎn)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: SOT-23-6
供應(yīng)商設(shè)備封裝: SOT-23-6
包裝: 標(biāo)準(zhǔn)包裝
輸入數(shù)目和類型: 2 個(gè)單端,雙極;1 個(gè)差分,單極
配用: MCP3421EV-ND - BOARD EVAL FOR MCP3421 SOT23-6
其它名稱: MCP3421A0T-E/OTDKR
MCP3421
DS22003B-page 10
2006 Microchip Technology Inc.
5.0
USING THE MCP3421 DEVICE
5.1
Operating Modes
The user operates the device by setting up the device
configuration register and reads the conversion data
using serial I2C interface commands. The MCP3421
operates in two modes: (a) Continuous Conversion
Mode or (b) One-Shot Conversion Mode (single
conversion). The selection is made by setting the O/C
bit in the Configuration Register. Refer to Section 5.2
“Configuration Register” for more information.
5.1.1
CONTINUOUS CONVERSION
MODE (O/C BIT = 1)
The MCP3421 device performs a Continuous
Conversion if the O/C bit is set to logic “high”. Once the
conversion is completed, the result is placed at the
output data register. The device immediately begins
another conversion and overwrites the output data
register with the most recent data.
The device also clears the data ready flag (RDY bit = 0)
when the conversion is completed. The device sets the
ready flag bit (RDY bit = 1), if the latest conversion
result has been read by the Master.
5.1.2
ONE-SHOT CONVERSION MODE
(O/C BIT = 0)
Once the One-Shot Conversion (single conversion)
Mode is selected, the device performs a conversion,
updates the Output Data register, clears the data ready
flag (RDY = 0), and then enters a low power standby
mode. A new One-Shot Conversion is started again
when the device receives a new write command with
RDY = 1.
This One-Shot Conversion Mode is recommended for
low power operating applications. During the low
current standby mode, the device consumes less than
1 A typical. For example, if user collects 18 bit
conversion data once a second in One-Shot Conver-
sion mode, the device draws only about one fourth of
its total operating current. In this example, the device
consumes approximately 39 A (= ~145 A/3.75 SPS),
if the device performs only one conversion per second
(1 SPS) in 18-bit conversion mode with 3V power
supply.
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