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| 型号： | LT1012CN8#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC PREC OP-AMP UNVRSL SNGL 8-DIP |
| 标准包装： | 50 |
| 放大器类型： | 通用 |
| 电路数： | 1 |
| 转换速率： | 0.2 V/µs |
| 电流 - 输入偏压： | 30pA |
| 电压 - 输入偏移： | 10µV |
| 电流 - 电源： | 380µA |
| 电压 - 电源，单路/双路(±)： | 2.4 V ~ 40 V，±1.2 V ~ 20 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
11
sn1012 1012afbs
LT1012A/LT1012
The LT1012 may be inserted directly into OP-07, LM11,
108A or 101A sockets with or without removal of external
frequency compensation or nulling components. The
LT1012 can also be used in 741, LF411, LF156 or OP-15
applications provided that the nulling circuitry is
removed.
Although the OP-97 is a copy of the LT1012, the LT1012
directly replaces and upgrades OP-97 applications. The
LT1012C and D have lower offset voltage and drift than the
OP-97F. The LT1012A has lower supply current than the
OP-97A/E. In addition, all LT1012 grades guarantee
operation at
±1.2V supplies.
Achieving Picoampere/Microvolt Performance
In order to realize the picoampere/microvolt level
accuracy of the LT1012, proper care must be exercised.
For example, leakage currents in circuitry external to
the op amp can significantly degrade performance. High
quality insulation should be used (e.g. Teflon, Kel-F);
cleaning of all insulating surfaces to remove fluxes and
other residues will probably be required. Surface coating
may be necessary to provide a moisture barrier in high
humidity environments.
Board leakage can be minimized by encircling the input
circuitry with a guard ring operated at a potential close
to that of the inputs: in inverting configurations the
guard ring should be tied to ground, in non-inverting
connections to the inverting input at Pin 2. Guarding both
sides of the printed circuit board is required. Bulk leakage
reduction depends on the guard ring width. Nanoampere
level leakage into the offset trim terminals can affect offset
voltage and drift with temperature.
Microvolt level error voltages can also be generated in
the external circuitry. Thermocouple effects caused by
temperature gradients across dissimilar metals at the
contacts to the input terminals can exceed the inherent
drift of the amplifier. Air currents over device leads should
be minimized, package leads should be short, and the two
input leads should be as close together as possible and
maintained at the same temperature.
Noise Testing
For application information on noise testing and calcula-
tions, please see the LT1008 data sheet.
Frequency Compensation
The LT1012 can be overcompensated to improve
capacitive load handling capability or to narrow noise
bandwidth. In many applications, the feedback loop around
the amplifier has gain (e.g. Iogarithmic amplifiers);
overcompensation can stabilize these circuits with a single
capacitor.
The availability of the compensation terminal permits
the use of feedforward frequency compensation to
enhance slew rate. The voltage follower feedforward
scheme bypasses the amplifier’s gain stages and slews at
nearly 10V/
s.
The inputs of the LT1012 are protected with back-to-back
diodes. Current limiting resistors are not used, because
the leakage of these resistors would prevent the realization
of picoampere level bias currents at elevated tempera-
tures. In the voltage follower configuration, when the input
is driven by a fast, large signal pulse (>1V), the input
protection diodes effectively short the output to the input
during slewing, and a current, limited only by the output
short-circuit protection will flow through the diodes.
The use of a feedback resistor, as shown in the voltage
follower feedforward diagram, is recommended because
this resistor keeps the current below the short-circuit
limit, resulting in faster recovery and settling of the output.
4
5
6
OUTPUT
OVER COMP
7
V
8
OFFSET TRIM
1
2
3
GUARD
IN
PUTS
V –
LT1012A * AI01
+
APPLICATIO S I FOR ATIO
WU
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1012CP | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage-Feedback Operational Amplifier |
| LT1012DH | 制造商:LINER 制造商全称:Linear Technology 功能描述:Picoamp Input Current, Microvolt Offset, Low Noise Op Amp |
| LT1012DN8 | 功能描述:IC PREC OP-AMP UNVRSL SNGL 8-DIP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| LT1012DN8#PBF | 功能描述:IC PREC OP-AMP UNVRSL SNGL 8-DIP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| LT1012IN8 | 功能描述:IC OPAMP UNIVRSL LOW NOISE 8DIP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
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