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| 型号： | MCP3424EV |
| 厂商： | Microchip Technology |
| 文件页数： | 14/58页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD FOR MCP3424 |
| 产品培训模块： | MCP3901 Analog Front End |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 18 |
| 采样率（每秒）： | 3.75 ~ 240 |
| 数据接口： | I²C |
| 输入范围： | ±2.048 V |
| 在以下条件下的电源（标准）： | 135µA @ 240sps |
| 工作温度： | -55°C ~ 125°C |
| 已用 IC / 零件： | MCP3424 |
| 已供物品： | 板 |
| 产品目录页面： | 672 (CN2011-ZH PDF) |
| 相关产品： | MCP3424T-E/STTR-ND - IC ADC 18BIT 3.75SPS 4CH 14TSSOP MCP3424T-E/SLTR-ND - IC ADC 18BIT 3.75SPS 4CH 14-SOIC MCP3424-E/ST-ND - IC ADC 18BIT 3.75SPS 4CH 14TSSOP MCP3424-E/SL-ND - IC ADC 18BIT 3.75SPS 4CH 14-SOIC |
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2009 Microchip Technology Inc.
DS22088C-page 21
MCP3422/3/4
TABLE 5-3:
ADDRESS BITS VS. ADDRESS
SELECTION PINS FOR
(MCP3423 AND MCP3424
ONLY) (NOTES 1, 2, 3)
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 MCP3422/3/4.
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
Characteristics Table.
9
1
9
1
Stop Bit by
11
0
1A2 A1 A0
R/W
ACK by
RDY
C1 C0
O/C
S1 S0 G1 G0
1st Byte:
2nd Byte:
Master
ACK by
Address Byte
Configuration Byte
Start Bit by
Master
with Write command
Note:
– Stop bit can be issued any time during writing.
– MCP3422/3/4 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
MCP3422/3/4
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