参数资料
| 型号： | ADT7475EBZEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 12/58页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR ADT7475 |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi |
| 标准包装： | 1 |
| 系列： | dBCool® |
| 类型： | 温度传感器 |
| 适用于相关产品： | ADT7475 |
| 所含物品： | 评估板 |
| 其它名称： | EVAL-ADT7475EB EVAL-ADT7475EB-ND |
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ADT7475
Turn-off Averaging
For each voltage measurement read from a value register,
16 readings have been made internally, and the
results averaged, before being placed into the value register.
channel is selected by writing to Bits <7:5> of the TACH1
minimum high byte register (0x55).
Table 8. SINGLE-CHANNE L ADC CONVERSION
For instances where faster conversions are needed, setting
Bit 4 of Configuration Register 2 (0x73) turns averaging
off. This effectively gives a reading 16 times faster (711 m s),
but the reading may be noisier.
Register 0x55, Bits <7:5>
001
010
101
Channel Selected
V CCP
V CC
Remote 1 Temperature
Bypass Voltage Input Attenuator
Setting Bit 5 of Configuration Register 2 (0x73) removes
the attenuation circuitry from the V CCP input. This allows
the user to directly connect external sensors or to rescale the
analog voltage measurement inputs for other applications.
The input range of the ADC without the attenuators is 0 V
110 Local Temperature
111 Remote 2 Temperature
Table 9. CONFIGURATION REGISTER 2 (REG. 0X73)
Bit Description
to 2.25 V.
Single-Channel ADC Conversion
Setting Bit 6 of Configuration Register 2 (0x73) places
<4>
<5>
<6>
1: Averaging Off
1: Bypass Input Attenuators
1: Single-channel Convert Mode
the ADT7475 into single-channel ADC conversion mode. In
this mode, the ADT7475 can be made to read a single
voltage channel only. If the internal ADT7475 clock is used,
the selected input is read every 711 m s. The appropriate ADC
TACH1 Minimum High Byte (0x55)
Bits <7:5> select the ADC channel for single-channel
convert mode.
Table 10. 10-BIT ADC OUTPUT CODE VS. V IN
ADC Output
V CC (3.3 V IN ) (Note 1)
<0.0042
0.0042 to 0.0085
0.0085 to 0.0128
0.0128 to 0.0171
0.0171 to 0.0214
0.0214 to 0.0257
0.0257 to 0.0300
0.0300 to 0.0343
0.0343 to 0.0386
?
1.100 to 1.1042
?
2.200 to 2.2042
?
3.300 to 3.3042
?
4.3527 to 4.3570
4.3570 to 4.3613
4.3613 to 4.3656
4.3656 to 4.3699
4.3699 to 4.3742
4.3742 to 4.3785
4.3785 to 4.3828
4.3828 to 4.3871
4.3871 to 4.3914
4.3914 to 4.3957
>4.3957
V CCP
<0.00293
0.0293 to 0.0058
0.0058 to 0.0087
0.0087 to 0.0117
0.0117 to 0.0146
0.0146 to 0.0175
0.0175 to 0.0205
0.0205 to 0.0234
0.0234 to 0.0263
?
0.7500 to 0.7529
?
1.5000 to 1.5029
?
2.2500 to 2.2529
?
2.9677 to 2.9707
2.9707 to 2.9736
2.9736 to 2.9765
2.9765 to 2.9794
2.9794 to 2.9824
2.9824 to 2.9853
2.9853 to 2.9882
2.9882 to 2.9912
2.9912 to 2.9941
2.9941 to 2.9970
>2.9970
Decimal
0
1
2
3
4
5
6
7
8
?
256 ( 1/4 scale)
?
512 ( 1/2 scale)
?
768 ( 3/4 scale)
?
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
Binary (10 Bits)
00000000 00
00000000 01
00000000 10
00000000 11
00000001 00
00000001 01
00000001 10
00000001 11
00000010 00
?
01000000 00
?
10000000 00
?
11000000 00
?
11111101 01
11111101 10
11111101 11
11111110 00
11111110 01
11111110 10
11111110 11
11111111 00
11111111 01
11111111 10
11111111 11
1. The V CC output codes listed assume that V CC is 3.3 V and that V CC should never exceed 3.6 V.
http://onsemi.com
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