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參數(shù)資料
| 型號： | TLC27M7MD |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LinCMOSE PRECISION DUAL OPERATIONAL AMPLIFIERS |
| 中文描述： | LinCMOSE精密雙運算放大器 |
| 文件頁數(shù)： | 15/34頁 |
| 文件大小： | 509K |
| 代理商： | TLC27M7MD |
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TLC27M2, TLC27M2A, TLC27M2B, TLC27M7
LinCMOS
PRECISION DUAL OPERATIONAL AMPLIFIERS
SLOS051C – OCTOBER 1987 – REVISED MAY 1999
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
input bias current
Because of the high input impedance of the TLC27M2 and TLC27M7 operational amplifiers, attempts to
measure the input bias current can result in erroneous readings. The bias current at normal room ambient
temperature is typically less than 1 pA, a value that is easily exceeded by leakages on the test socket. Two
suggestions are offered to avoid erroneous measurements:
1.
Isolate the device from other potential leakage sources. Use a grounded shield around and between the
device inputs (see Figure 4). Leakages that would otherwise flow to the inputs are shunted away.
2.
Compensate for the leakage of the test socket by actually performing an input bias current test (using
a picoammeter) with no device in the test socket. The actual input bias current can then be calculated
by subtracting the open-socket leakage readings from the readings obtained with a device in the test
socket.
One word of caution—many automatic testers as well as some bench-top operational amplifier testers
use the servo-loop technique with a resistor in series with the device input to measure the input bias
current (the voltage drop across the series resistor is measured and the bias current is calculated). This
method requires that a device be inserted into the test socket to obtain a correct reading; therefore, an
open-socket reading is not feasible using this method.
V = VIC
4
1
5
8
8
5
Figure 4. Isolation Metal Around Device Inputs
(JG and P packages)
low-level output voltage
To obtain low-supply-voltage operation, some compromise was necessary in the input stage. This compromise
results in the device low-level output being dependent on both the common-mode input voltage level as well
as the differential input voltage level. When attempting to correlate low-level output readings with those quoted
in the electrical specifications, these two conditions should be observed. If conditions other than these are to
be used, please refer to Figures 14 through 19 in the Typical Characteristics of this data sheet.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLC27M7MJGB | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| TLC27M7MUB | 制造商:Texas Instruments 功能描述: |
| TLC27M9CD | 功能描述:運算放大器 - 運放 LiNCMOS Med Bias RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TLC27M9CDG4 | 功能描述:運算放大器 - 運放 Quad Precision Lo-Pwr Single Supply RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TLC27M9CDR | 功能描述:運算放大器 - 運放 Quad Precision Lo-Pwr Single Supply RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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