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參數(shù)資料
| 型號： | TC7109ACKW713 |
| 元件分類： | ADC |
| 英文描述： | 1-CH 12-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數(shù)： | 8/30頁 |
| 文件大?。?/td> | 479K |
| 代理商： | TC7109ACKW713 |
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TC7109/A
DS21456C-page 16
2006 Microchip Technology Inc.
3.5.6
REFERENCE SOURCES
A major factor in the absolute accuracy of the ADC is
the stability of the reference voltage. The 12-bit resolu-
tion of the TC7109A is one part in 4096, or 244 ppm.
Thus, for the on-board reference temperature coeffi-
cient of 70ppm/°C, a temperature difference of 3°C will
introduce a one-bit absolute error. Where the ambient
temperature is not controlled, or where high accuracy
absolute
measurements
are
being
made,
it
is
recommended that an external high quality reference
be used.
A reference output (Pin 29) is provided, which may be
used with a resistive divider to generate a suitable ref-
erence voltage (20mA may be sunk without significant
variation in output voltage). A pull-up bias device is pro-
vided, which sources about 10
μA. The output voltage is
nominally 2.8V below V+. When using the on-board
reference, REF OUT (Pin 29) should be connected to
REF IN- (pin 39), and REF IN+ should be connected to
the wiper of a precision potentiometer between REF
OUT and V+. The test circuit shows the circuit for a
204.8mV reference, generated by a 2k
Ω precision
potentiometer in series with a 24k
Ω fixed resistor.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC7109ACLW | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 13 Bit Fast Recovery 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TC7109ACLW713 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 13 Bit Fast Recovery 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TC7109ACPL | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 13 Bit Fast Recovery 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TC7109AIJL | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 13 Bit Fast Recovery 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TC7109CKW | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 13 Bit Fast Recovery 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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