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参数资料
型号： MCP3421DM-WS
厂商： Microchip Technology
文件页数： 18/42页
文件大小： 0K
描述： BOARD DEMO MCP3421 WEIGHT SCALE
标准包装： 1
主要目的： 参考设计，称量台
嵌入式： 是，MCU，8 位
已用 IC / 零件： MCP3421，MCP6V07，PIC18F4550
主要属性： 2Kg测压元件，灵敏度为1 mV/V
已供物品： 板，线缆，CD，电源
2009 Microchip Technology Inc.
DS22003E-page 25
MCP3421
High-Speed Mode (3.4 MHz): Not recommended for VDD < 2.7V
Clock frequency
fSCL
——
3.4
MHz
Cb = 100 pF
——
1.7
MHz
Cb = 400 pF
Clock high time
THIGH
60
—
ns
Cb = 100 pF, fSCL = 3.4 MHz
120
—
ns
Cb = 400 pF, fSCL = 1.7 MHz
Clock low time
TLOW
160
—
ns
Cb = 100 pF, fSCL = 3.4 MHz
320
—
ns
Cb = 400 pF, fSCL = 1.7 MHz
SCL rise time
(Note 1)
TR
—
40
ns
From VIL to VIH,
Cb = 100 pF, fSCL = 3.4 MHz
—
80
ns
From VIL to VIH,
Cb = 400 pF, fSCL = 1.7 MHz
SCL fall time
(Note 1)
TF
—
40
ns
From VIH to VIL,
Cb = 100 pF, fSCL = 3.4 MHz
—
80
ns
From VIH to VIL,
Cb = 400 pF, fSCL = 1.7 MHz
SDA rise time
(Note 1)
TR: DAT
—
80
ns
From VIL to VIH,
Cb = 100 pF, fSCL = 3.4 MHz
—
160
ns
From VIL to VIH,
Cb = 400 pF, fSCL = 1.7 MHz
SDA fall time
(Note 1)
TF: DATA
—
80
ns
From VIH to VIL,
Cb = 100 pF, fSCL = 3.4 MHz
—
160
ns
From VIH to VIL,
Cb = 400 pF, fSCL = 1.7 MHz
Data hold time
(Note 4)
THD:DAT
0
—
70
ns
Cb = 100 pF, fSCL = 3.4 MHz
0—
150
ns
Cb = 400 pF, fSCL = 1.7 MHz
Output valid from clock
(Notes 2 and 3)
TAA
——
150
ns
Cb = 100 pF, fSCL = 3.4 MHz
——
310
ns
Cb = 400 pF, fSCL = 1.7 MHz
START condition hold time
THD:STA
160
—
ns
START (Repeated) condition
setup time
TSU:STA
160
—
ns
Data input setup time
TSU:DAT
10
—
ns
STOP condition setup time
TSU:STO
160
—
ns
TABLE 5-4:
I2C SERIAL TIMING SPECIFICATIONS (CONTINUED)
Electrical Specifications: Unless otherwise specified, all limits are specified for T
A = -40 to +85°C,
VIN+ = VIN- = VREF/2, VSS = 0V, VDD = +2.7V to +5.0V.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Note 1: This parameter is ensured by characterization and not 100% tested.
2: This specification is not a part of the I2C specification. This specification is equivalent to the Data Hold
Time (THD:DAT) plus SDA Fall (or rise) time: TAA = THD:DAT + TF (OR TR).
3: If this parameter is too short, it can create an unintended Start or Stop condition to other devices on the
bus line. If this parameter is too long, Clock Low time (TLOW) can be affected.
4: For Data Input: This parameter must be longer than t
SP. If this parameter is too long, the Data Input Setup
(TSU:DAT) or Clock Low time (TLOW) can be affected.
For Data Output: This parameter is characterized, and tested indirectly by testing TAA parameter.
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