參數(shù)資料
型號: MCP3427-E/MF
廠商: Microchip Technology
文件頁數(shù): 14/56頁
文件大小: 0K
描述: IC ADC 16BIT I2C PROGBL 10-DFN
產(chǎn)品培訓模塊: MCP3901 Analog Front End
標準包裝: 120
位數(shù): 16
采樣率(每秒): 15
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: 10-VFDFN 裸露焊盤
供應商設備封裝: 10-DFN-EP(3x3)
包裝: 管件
輸入數(shù)目和類型: 2 個差分,單極
產(chǎn)品目錄頁面: 672 (CN2011-ZH PDF)
2009 Microchip Technology Inc.
DS22226A-page 21
MCP3426/7/8
TABLE 5-3:
ADDRESS BITS VS. ADDRESS
SELECTION PINS FOR
(MCP3427 AND MCP3428
5.3.3
WRITING A CONFIGURATION BYTE
TO THE DEVICE
When the Master sends an address byte with the R/W
bit low (R/W = 0), the device expects one configuration
byte following the address. Any byte sent after this
second byte will be ignored. The user can change the
operating
mode
of
the
device
by
writing
the
configuration register bits.
If the device receives a write command with a new
configuration setting, the device immediately begins a
new conversion and updates the conversion data.
FIGURE 5-3:
Timing Diagram For Writing To The MCP3426/7/8.
I2C Device
Address Bits
Logic Status of Address
Selection Pins
A2
A1
A0
Adr0 Pin
Adr1 Pin
000
0 (Addr_Low)
001
0 (Addr_Low)
Float
010
0 (Addr_Low)
1 (Addr_High)
100
1 (Addr_High)
0 (Addr_Low)
101
1 (Addr_High)
Float
110
1 (Addr_High)
011
Float
0 (Addr_Low)
111
Float
1 (Addr_High)
000
Float
Note 1:
Float: (a) Leave pin without connecting to
anything (left floating), or (b) apply
Addr_Float voltage.
2:
The user can tie the pins to VSS or VDD:
- Tie to VSS for Addr_Low
- Tie to VDD for Addr_High
3:
See Addr_Low, Addr_High, and
Addr_Float parameters in Electrical
9
1
9
1
Stop Bit by
11
0
1A2 A1 A0
R/W
ACK by
MCP3426/7/8
RDY
C1 C0
O/C
S1 S0 G1 G0
1st Byte:
2nd Byte:
Master
ACK by
MCP3426/7/8
Address Byte
Configuration Byte
Start Bit by
Master
with Write command
Note:
– Stop bit can be issued any time during writing.
– MCP3426/7/8 device code is 1101 (programmed at the factory).
– See Figure 5-1 for details in Address Byte.
SCL
SDA
(a) One-Shot Mode: 1
(b) Continuous Mode: not effected
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