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參數(shù)資料
| 型號： | TC3403 |
| 廠商： | Microchip Technology Inc. |
| 元件分類： | 復(fù)位半導(dǎo)體 |
| 英文描述： | +1.8V Low Power, Quad Input, 16-Bit Sigma-Delta A/D Converter with a Power Fault Monitor and Microprocessor Reset Circuit |
| 中文描述： | 1.8V的低功耗，四路輸入，16位Σ-ΔA / D轉(zhuǎn)換的電源故障監(jiān)測和微處理器復(fù)位電路轉(zhuǎn)換器 |
| 文件頁數(shù)： | 10/17頁 |
| 文件大小： | 461K |
| 代理商： | TC3403 |
TC3403
DS21412B-page 10
2002 Microchip Technology Inc.
3.3
V
DD
Monitor
The TC3403 RESET output is high impedance pro-
vided the voltage at V
TH
is greater than the internal
voltage reference. This reference is approximately the
same value as the voltage appearing at REF
OUT
. When
V
TH
is less than the internal reference, RESET is pulled
low. When V
TH
rises above the internal reference
voltage again, RESET is held low for the reset active
timeout period, t
9
, before being released. The RESET
output is ensured to be valid for V
DD
= 1.3V to 5.5V.
When used to generate a Power-on or Brown-out
Reset, an external resistor network is required to divide
the appropriate V
DD
threshold down to 1.23V at the
V
TH
input, (See the Typical Application
example, to generate a POR for a V
DD
at 3V- 10%, then
the values of R1 and R2 should be 137k
and 115k
respectively.
circuit). For
Since RESET is an open drain, it can be wired-OR’ed
with another open drain or external switch if desired.
3.4
Power Fail Detector
The Power Fail detector is a comparator in which the
inverting input is connected to the internal voltage
reference. The non-inverting input is the PFI pin of the
TC3403 and the PFO pin is the active low, open drain
output. This comparator is suitable as an early warning
fail or low battery indicator. In a typical application,
where a voltage regulator is being used to supply
power to a system, the Power Fail comparator would
monitor the input voltage to the regulator while the V
DD
monitor would measure the output voltage of the
regulator. Both PFO and RESET would drive interrupt
pins of a microcontroller.
The Power Fail detector may be used as a Wake-up or
Watchdog Timer. The Typical Application circuit shows
an RC network on PFI with the capacitor tied to a
tristated
μ
C I/O pin. If R4 is 1 M
and C2 is 10
μ
F, the
time constant is roughly ten seconds. The
μ
C resets
the RC network by driving the I/O tied to PFI low and
then tristating it. The RC network will ramp to 1.23V in
roughly 9 seconds, assuming a V
BATT
of 3.0V. With
PFO tied to a
μ
C input or interrupt, the
μ
C will see a low
to high transition on PFO when the voltage on PFI
exceeds 1.23V. The PFO output is specified to be valid
for V
DD
= 1.3 to 5.5V.
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| TC3403_05 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:+1.8V Low Power, Quad Input, 16-Bit Sigma-Delta A/D Converter with a Power Fault Monitor and Microprocessor Reset Circuit |
| TC3403VPE | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 1.8V Lw Pwr Quad RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TC3403VQR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 1.8V Lw Pwr Quad RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TC3403VQRTR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 1.8V Lw Pwr Quad RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TC3404 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:+1.8V Low Power, Quad Input, 16-Bit Sigma-Delta A/D Converter with a Power Fault Monitor |
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