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| 型号： | LT6230IS6#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/24页 |
| 文件大小： | 0K |
| 描述： | IC OP AMP SGL 215MHZ R-R SOT23-6 |
| 标准包装： | 2,500 |
| 放大器类型： | 通用 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 70 V/µs |
| 增益带宽积： | 215MHz |
| 电流 - 输入偏压： | 5µA |
| 电压 - 输入偏移： | 100µV |
| 电流 - 电源： | 3.3mA |
| 电流 - 输出 / 通道： | 30mA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 12.6 V，±1.5 V ~ 6.3 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | TSOT-23-6 |
| 包装： | 带卷 (TR) |
17
623012fc
LT6230/LT6230-10
LT6231/LT6232
applicaTions inForMaTion
Amplifier Characteristics
Figure 1 is a simplified schematic of the LT6230/LT6231/
LT6232, which has a pair of low noise input transistors
Q1 and Q2. A simple current mirror, Q3/Q4, converts the
differential signal to a single-ended output, and these
transistors are degenerated to reduce their contribution
to the overall noise.
Capacitor C1 reduces the unity-cross frequency and im-
proves the frequency stability without degrading the gain
bandwidth of the amplifier. Capacitor CM sets the overall
amplifier gain bandwidth. The differential drive generator
supplies current to transistors Q5 and Q6 that swing the
output from rail-to-rail.
Input Protection
Thereareback-to-backdiodes,D1andD2acrossthe+and
– inputs of these amplifiers to limit the differential input
voltage to ±0.7V. The inputs of the LT6230/LT6231/LT6232
do not have internal resistors in series with the input tran-
sistors. This technique is often used to protect the input
devices from overvoltage that causes excessive current
to flow. The addition of these resistors would significantly
degrade the low noise voltage of these amplifiers. For
instance, a 100Ω resistor in series with each input would
generate 1.8nV/√Hz of noise, and the total amplifier noise
voltage would rise from 1.1nV/√Hz to 2.1nV/√Hz. Once
the input differential voltage exceeds ±0.7V, steady-state
current conducted through the protection diodes should
be limited to ±40mA. This implies 25Ω of protection re-
sistance is necessary per volt of overdrive beyond ±0.7V.
These input diodes are rugged enough to handle transient
currents due to amplifier slew rate overdrive and clipping
without protection resistors.
The photo of Figure 2 shows the output response to an
input overdrive with the amplifier connected as a voltage
follower. With the input signal low, current source I1 satu-
rates and the differential drive generator drives Q6 into
saturation so the output voltage swings all the way to V–.
The input can swing positive until transistor Q2 saturates
into current mirror Q3/Q4. When saturation occurs, the
output tries to phase invert, but diode D2 conducts current
from the signal source to the output through the feedback
connection. The output is clamped a diode drop below the
input. In this photo, the input signal generator is limiting
at about 20mA.
ENABLE
DESD6
DESD5
–V
+V
+VIN
–VIN
+V
623012 F01
BIAS
DIFFERENTIAL
DRIVE GENERATOR
VOUT
+V
CM
I1
–V
DESD3
–V
DESD4
+V
DESD1
–V
DESD2
+V
D1
C1
D2
Q5
Q6
Q4
Q2
Q3
Q1
2.5V
0V
–2.5V
500s/DIV
623012 F02
1V
/DIV
Figure 1. Simplified Schematic
Figure 2. VS = ±2.5V, AV = 1 with Large Overdrive
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT6231 | 制造商:LINER 制造商全称:Linear Technology 功能描述:215MHz, Rail-to-Rail Output, 1.1nV/ root Hz, 3.5mA Op Amp Family |
| LT6231CDD | 功能描述:IC OP AMP DUAL LP 3.4MA 8-DFN RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 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 |
| LT6231CDD#PBF | 功能描述:IC OP AMP DUAL LP 3.4MA 8-DFN RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Differential Circuit Design Techniques for Communication Applications 标准包装:1 系列:- 放大器类型:RF/IF 差分 电路数:1 输出类型:差分 转换速率:9800 V/µs 增益带宽积:- -3db带宽:2.9GHz 电流 - 输入偏压:3µA 电压 - 输入偏移:- 电流 - 电源:40mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VQFN 裸露焊盘，CSP 供应商设备封装:16-LFCSP-VQ 包装:剪切带 (CT) 产品目录页面:551 (CN2011-ZH PDF) 其它名称:ADL5561ACPZ-R7CT |
| LT6231CDD#PBF | 制造商:Linear Technology 功能描述:OP-AMP, 215MHZ, 70V/ us, DFN-8 |
| LT6231CDD#TR | 功能描述:IC OP AMP DUAL 215MHZ R-R 8-DFN RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 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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