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| 型号： | 5962-88760012A |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 运算放大器 |
| 英文描述： | DUAL OP-AMP, 300 uV OFFSET-MAX, 1 MHz BAND WIDTH, CQCC20 |
| 封装： | CERAMIC, LCC-20 |
| 文件页数： | 10/33页 |
| 文件大小： | 785K |
| 代理商： | 5962-88760012A |
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LT1013, LT1013A, LT1013D
DUAL PRECISION OPERATIONAL AMPLIFIERS
SLOS018H MAY 1988 REVISED NOVEMBER 2004
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
single-supply operation
The LT1013 is fully specified for single-supply operation (VCC = 0). The common-mode input voltage range
includes ground, and the output swings to within a few millivolts of ground.
Furthermore, the LT1013 has specific circuitry that addresses the difficulties of single-supply operation, both
at the input and at the output. At the input, the driving signal can fall below 0 V, either inadvertently or on a
transient basis. If the input is more than a few hundred millivolts below ground, the LT1013 is designed to deal
with the following two problems that can occur:
1.
On many other operational amplifiers, when the input is more than a diode drop below ground, unlimited
current flows from the substrate (VCC terminal) to the input, which can destroy the unit. On the LT1013,
the 400-
resistors in series with the input [see schematic (each amplifier)] protect the device, even
when the input is 5 V below ground.
2.
When the input is more than 400 mV below ground (at TA = 25°C), the input stage of similar operational
amplifiers saturates, and phase reversal occurs at the output. This can cause lockup in servo systems.
Because of unique phase-reversal protection circuitry (Q21, Q22, Q27, and Q28), the LT1013 outputs
do not reverse, even when the inputs are at 1.5 V (see Figure 24).
This phase-reversal protection circuitry does not function when the other operational amplifier on the LT1013
is driven hard into negative saturation at the output. Phase-reversal protection does not work on amplifier 1
when amplifier 2 output is in negative saturation nor on amplifier 2 when amplifier 1 output is in negative
saturation.
At the output, other single-supply designs either cannot swing to within 600 mV of ground or cannot sink more
than a few microamperes while swinging to ground. The all-npn output stage of the LT1013 maintains its low
output resistance and high-gain characteristics until the output is saturated. In dual-supply operations, the
output stage is free of crossover distortion.
(a) VI(PP) = 1.5 V TO 4.5 V
(b) OUTPUT PHASE REVERSAL
EXHIBITED BY LM358
(c) NO PHASE REVERSAL
EXHIBITED BY LT1013
1
0
1
2
3
4
5
1
0
1
2
3
4
5
1
0
1
2
3
4
5
2
VI(PP)
Input
V
o
ltage
V
I(PP)
V
VO
Output
V
o
ltage
V
O
VO
Output
V
o
ltage
V
O
Figure 24. Voltage-Follower Response With Input Exceeding
the Negative Common-Mode Input Voltage Range
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| 5962-8876002PA | DUAL OP-AMP, 550 uV OFFSET-MAX, 1 MHz BAND WIDTH, CDIP8 |
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相关代理商/技术参数 |
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| 5962-8876001GA | 制造商:Linear Technology 功能描述:ELD (STD. MIL DWG.) LT1013AMH |
| 5962-8876001PA | 制造商:Texas Instruments 功能描述:OP Amp Dual GP ±22V/44V 8-Pin CDIP Tube 制造商:Texas Instruments 功能描述:OP AMP DUAL GP 22V/44V 8CDIP - Rail/Tube |
| 5962-8876002PA | 制造商:Texas Instruments 功能描述:OP Amp Dual GP 制造商:Texas Instruments 功能描述:OP AMP DUAL GP 22V/44V 8CDIP - Rail/Tube |
| 5962-8876202GA | 制造商:Linear Technology 功能描述:V-Ref Precision 5V 10mA 8-Pin TO-5 |
| 5962-8876203GA | 制造商:Linear Technology 功能描述: |
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