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參數(shù)資料
| 型號： | 5962-9753702QPA |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 運(yùn)算放大器 |
| 英文描述： | DUAL OP-AMP, 50 uV OFFSET-MAX, 4.7 MHz BAND WIDTH, CDIP8 |
| 封裝： | CERAMIC, DIP-8 |
| 文件頁數(shù)： | 14/38頁 |
| 文件大小： | 867K |
| 代理商： | 5962-9753702QPA |
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TLC4501, TLC4501A, TLC4502, TLC4502A
FAMILY OF SELF-CALIBRATING (Self-Cal
)
PRECISION CMOS RAIL-TO-RAIL OUTPUT OPERATIONAL AMPLIFIERS
SLOS221B – MAY 1998 – REVISED APRIL 2001
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POWER-ON RESET
S
R
Q
ENABLE
RC
OSCILLATOR
COUNTER
RCO
CLOCK
CAL
RESET
SAR
RCO
DAC
LPF
VDD
CORE
AMPLIFIER
+
–
Figure 35. Block Diagram During Calibration Mode
The class AB output stage features rail-to-rail voltage swing and incorporates additional switches to put the
output node into a high-impedance mode during the calibration cycle. Small-replica output transistors (matched
to the main output transistors) provide the amplifier output signal for the calibration circuit. The TLC4502 also
features built-in output short-circuit protection. The output current flowing through the main output transistors
is continuously being sensed. If the current through either of these transistors exceeds the preset limit (60 mA
– 70 mA) for more than about 1
s, the output transistors are shut down to approximately their quiescent
operating point for approximately 5 ms. The device is then returned to normal operation. If the short circuit is
still in place, it is detected in less than 1
s and the device is shut down for another 5 ms.
The offset cancellation uses a current-mode digital-to-analog converter (DAC), whose full-scale current allows
for an adjustment of approximately
±5 mV to the input offset voltage. The digital code producing the cancellation
current is stored in the successive-approximation register (SAR).
During power up, when the offset cancellation procedure is initiated, an on-chip RC oscillator is activated to
provide the timing of the successive-approximation algorithm. To prevent wide-band noise from interfering with
the calibration procedure, an analog low-pass filter followed by a Schmitt trigger is used in the decision chain
to implement an averaging process. Once the calibration procedure is complete, the RC oscillator is deactivated
to reduce supply current and the associated noise.
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| 5962-9755701HXX | ISOLATION AMPLIFIER, 100 kHz BAND WIDTH, CDSO8 |
| 5962-9755701HYX | ISOLATION AMPLIFIER, 100 kHz BAND WIDTH, CDSO8 |
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| 5962-9755701HYX | ISOLATION AMPLIFIER, 100 kHz BAND WIDTH, CDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 5962-9754101QCA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:5962-9754101QCA, QUAD 2-IN POS-NAND BUFF - Rail/Tube |
| 5962-9754101QDA | 制造商:Texas Instruments 功能描述:NAND Gate 4-Element 2-IN Bipolar 14-Pin CFPAK Tube |
| 5962-9754201Q2A | 制造商:Texas Instruments 功能描述:Buffer/Line Driver 8-CH Non-Inverting 3-ST CMOS 20-Pin LCCC Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| 5962-9754201QSA | 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:Buffer/Line Driver 8-CH Non-Inverting 3-ST CMOS 20-Pin CFPAK Tube |
| 5962-9754201VSA | 制造商:Texas Instruments 功能描述:OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS |
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