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參數(shù)資料
| 型號(hào)： | MCP3424T-E/ST |
| 廠商： | Microchip Technology |
| 文件頁(yè)數(shù)： | 26/58頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 18BIT 3.75SPS 4CH 14TSSOP |
| 產(chǎn)品培訓(xùn)模塊： | MCP3901 Analog Front End |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 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： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-TSSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 8 個(gè)單端，雙極；4 個(gè)差分，雙極 |
| 配用： | MCP3424EV-ND - EVALUATION BOARD FOR MCP3424 |
| 其它名稱： | MCP3424T-E/STTR |
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MCP3422/3/4
DS22088C-page 32
2009 Microchip Technology Inc.
6.1.4
DEVICE CONNECTION TEST
The user can test the presence of the MCP3422/3/4 on
the I2C bus line without performing an input data
conversion. This test can be achieved by checking an
acknowledge response from the MCP3422/3/4 after
sending a read or write command. Here is an example
using Figure 6-3:
a.
Set the R/W bit “HIGH” in the address byte.
b.
Check the ACK pulse after sending the address
byte.
If the device acknowledges (ACK = 0), then the
device
is
connected,
otherwise
it
is
not
connected.
c.
Send STOP or START bit.
FIGURE 6-3:
I2C Bus Connection Test.
6.1.5
DIFFERENTIAL AND SINGLE-
ENDED CONFIGURATION
Figure 6-4 shows typical connection examples for
differential and single-ended inputs. Differential input
signals can be connected to the CHn+ and CHn- input
pins, where n = the channel number (1, 2, 3, or 4). For
the single-ended input, the input signal is applied to one
of the input pins (typically connected to the CHn+ pin)
while the other input pin (typically CHn- pin) is
grounded. All device characteristics hold for the single-
ended configuration, but this configuration loses one bit
resolution because the input can only stand in positive
half scale. Refer to Section 1.0 “Electrical Character-
FIGURE 6-4:
Differential and Single-
Ended Input Connections.
12
3
4
5
6
7
8
9
SCL
SDA
1
0
1A2 A1 A0 1
Start
Bit
Address Byte
Address bits
Device bits
R/W
Stop
Bit
ACK
Response
MCP342X
(a) Differential Input Signal Connection:
CHn+
CHn-
Input Signal
(b) Single-ended Input Signal Connection:
CHn+
CHn-
Input Signal
Sensor
Excitation
R1
R2
MCP342X
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