参数资料
| 型号： | LT1638CDD#TR |
| 厂商： | Linear Technology |
| 文件页数： | 4/18页 |
| 文件大小： | 0K |
| 描述： | IC OP AMP 1.2MHZ R-R IN/OUT 8DFN |
| 标准包装： | 2,500 |
| 系列： | Over-The-Top® |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.4 V/µs |
| 增益带宽积： | 1.2MHz |
| 电流 - 输入偏压： | 20nA |
| 电压 - 输入偏移： | 450µV |
| 电流 - 电源： | 205µA |
| 电流 - 输出 / 通道： | 40mA |
| 电压 - 电源，单路/双路(±)： | 2.5 V ~ 44 V，±1.25 V ~ 22 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN-EP（3x3） |
| 包装： | 带卷 (TR) |
LT1638/LT1639
12
16389fg
APPLICATIONS INFORMATION
nonlinear common mode rejection. If the op amp is
operating inverting there is no common mode induced
distortion. If the op amp is operating in the PNP input
stage (input is not within 0.8V of V+), the CMRR is very
good, typically 98dB. When the LT1638 switches between
input stages there is signicant nonlinearity in the CMRR.
Lower load resistance increases the output crossover
distortion, but has no effect on the input stage transition
distortion. For lowest distortion the LT1638/LT1639 should
be operated single supply, with the output always sourcing
current and with the input voltage swing between ground
and (V+ – 0.8V). See the Typical Performance Character-
istics curves.
Gain
The open-loop gain is almost independent of load when
the output is sourcing current. This optimizes perfor-
mance in single supply applications where the load is
returned to ground. The typical performance curve of
Open-Loop Gain for various loads shows the details.
TYPICAL APPLICATIONS
With 1.2MHz bandwidth, Over-The-Top capability, reverse-
battery protection and rail-to-rail input and output features,
the LT1638/LT1639 are ideal candidates for general purpose
applications.
The lowpass slope limiting lter in Figure 1 limits the
maximum dV/dT (not frequency) that it passes. When the
input signal differs from the output by one forward diode
drop, D1 or D2 will turn on. With a diode on, the voltage
across R2 will be constant and a xed current, VDIODE/R2,
will ow through capacitor C1, charging it linearly instead
of exponentially. The maximum slope that the circuit will
pass is equal to VDIODE divided by (R2)(C1). No matter
how fast the input changes the output will never change
any faster than the dV/dT set by the diodes and (R2)(C).
Figure 1. Lowpass Slope Limiting Filter
–
+
1/2 LT1638
C1
VOUT
1638/39 F01
R2
D2
D1
R1
VIN
FOR R1 = 10k, R2 = 100k, C1 = 1000pF
VOUT(MAX) =
d
dt
VD
(R2)(C1)
VOUT(MAX) = 0.006V/μs
d
dt
A modication of this application is shown in Figure 2 using
references instead of diodes to set the maximum slope. By
using references, the slope is independent of temperature.
A scope photo shows a 1VP-P, 2kHz input signal with a 2V
pulse added to the sine wave; the circuit passes the 2kHz
signal but limits the slope of the pulse.
VOUT
VIN
Response of Slope Limiting Filter
Figure 2. Lowpass Slope Limiting Filter with 0 TC
1638/39 TA02
–
+
–
+
1/4 LT1639
–
+
1/4 LT1639
D1
D2
VCC
C1
VOUT
VEE
VIN
R5
100k
R6
100k
1638/39 F02
LT1634-1.2V
R3
100k
R4
100k
R2
R1
1k
D3
D4
LT1634-1.2V
FOR R2 = 50k, C1 = 500pF,
MAXIMUM SLOPE = 0.048V/μs
VOUT =
d
dt
1.2V
(R2)(C1)
D1 TO D4 = IN4148
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| LT1638CMS8 | 功能描述:IC OPAMP R-R IN/OUT DUAL 8-MSOP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 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:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
| LT1638CMS8#PBF | 功能描述:IC OPAMP R-R IN/OUT DUAL 8-MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 标准包装:2,500 系列:- 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:45nA 电压 - 输入偏移:2000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:40mA 电压 - 电源，单路/双路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作温度:0°C ~ 70°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:带卷 (TR) 其它名称:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| LT1638CMS8#TR | 功能描述:IC OPAMP R-R IN/OUT DUAL 8-MSOP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 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:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
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