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參數資料
| 型號： | TSC2302IRGZRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| 封裝： | GREEN, PLASTIC, VQFN-48 |
| 文件頁數： | 43/85頁 |
| 文件大小： | 1483K |
| 代理商： | TSC2302IRGZRG4 |
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Start Clock
Turn off clock
Convert Temperature
Input 2
Store Temperature
Input 2 in TEMP2
Register
Power up ADC
Power Down
Reference
Is Data
Averaging
Done
N
Y
Power Down ADC
DONE
Host Writes A/D
Converter Control
Register
Power Up Reference
(Including Delay)
Set /DAV = 0
TSC2302
SLAS394 – JULY 2003
TEMPERATURE INPUT 2
Figure 58. Additional Temperature Measurement for Differential Temperature Reading
OPERATION - BATTERY MEASUREMENT
An added feature of the TSC2302 is the ability to monitor the battery voltage which may be much larger than the
supply voltage of the TSC2302. An example of this is shown in Figure 59, where a battery voltage ranging up to
6 V may be regulated by a dc/dc converter or low-dropout regulator to provide a lower supply voltage to the
TSC2302. The battery voltage can vary from 0.5 V to 6 V while maintaining the voltage to the TSC2302 at a level
of 2.7 V-3.6 V. The input voltage on VBAT1 is divided down by 4 so that a 6-V battery voltage is represented as
1.5 V to the A/D, while the input voltage on VBAT2 is divided by 2 so that 3.0-V battery voltage is represented as
1.5 V to the A/D. If the battery voltage is low enough, the 1.2 V internal reference can be used to decrease LSB
size, potentially improving accuracy. The battery voltage on VBAT1 must be below 4* VREF, and the voltage on
VBAT2 must be below 2* VREF. Due to constraints of the internal switches, the input to the A/D after the voltage
divider cannot be above 1.5 V or VREF, whichever is lower. In order to minimize the power consumption, the
divider is only ON during the sampling of the battery input.
48
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