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参数资料
| 型号： | LT6220IS5#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO5 |
| 封装： | PLASTIC, MO-193, TSOT-23, 5 PIN |
| 文件页数： | 8/20页 |
| 文件大小： | 279K |
| 代理商： | LT6220IS5#PBF |
LT6220/LT6221/LT6222
16
sn622012 622012fs
U
PACKAGE DESCRIPTIO
As the signal level increases though, the output of the op
amp goes more negative. At 12.5A of photodiode cur-
rent, the 100k gain dictates that the LT6220 output will
be about 1.25V below ground. However, at that point the
emitter of Q2 will be at ground, and the base of Q1 will be
1V below ground. Thus, Q1 turns on and photodiode
current starts to flow through R2. The transimpedance
gain is therefore now reduced to R1||R2, or about 3.1k.
The circuit response is shown in Figure 3. Note the smooth
transition between the two operating gains, as well as the
linearity.
Differential-In/Differential-Out Amplifier
The circuit of Figure 6 shows the LT6222 applied as a
buffered differential-in differential-out amplifier with a
gain of 2. Op amps A and B are configured as simple unity-
gain buffers, offering high input impedance to upstream
circuitry. Resistors R1 and R2 perform an averaging
function on the common mode input voltage and R3
attenuates it by a factor of 2/3 and references it to the
voltage source VOCM. The resultant voltage, VMID = 2/3
VICM, is placed at the noninverting inputs of op amps C and
D. The other four resistors set gains of +3 from the
noninverting input and –2 through the inverting path. Thus
the output voltage of the upper path is:
–OUT = 3 (2/3 VICM + 1/3 VOCM) – 2
(VICM + VDIFF/2)
= 2VICM + VOCM – 2VICM – VDIFF
= VOCM – VDIFF
Figure 4. 3V, 1MHz, 4th Order Butterworth Filter
Figure 5. Frequency Response of Filter
Figure 3. Stepped-Gain Photodiode Amplifier Response
PHOTO
CURRENT
100A/DIV
VOUT
0.5V/DIV
5s/DIV
622012 F03
Single 3V Supply, 1MHz, 4th Order Butterworth Filter
The circuit shown in Figure 4 makes use of the low voltage
operation and the wide bandwidth of the LT6221 to create
a DC accurate 1MHz 4th order lowpass filter powered from
a 3V supply. The amplifiers are configured in the inverting
mode for the lowest distortion and the output can swing
rail-to-rail for maximum dynamic range. Figure 5 displays
the frequency response of the filter. Stopband attenuation
is greater than 100dB at 50MHz.
–
+
1/2 LT6221
47pF
220pF
VIN
VS/2
909
2.67k
909
–
+
1/2 LT6221
22pF
VOUT
470pF
622012 F04
1.1k
2.21k
3V
1.1k
FREQUENCY (Hz)
–80
GAIN
(dB)
–40
0
–100
–60
–20
20
1k
100k
1M
10M
100M
622012 F05
–120
10k
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT6220IS5TRMPBF | 制造商:Linear Technology 功能描述:Op Amp GP RRIO +/-6.3V/12.6V TSOT23-5 |
| LT6220IS8 | 功能描述:IC OP AMP PREC SGL 60MHZ 8-SOIC 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) |
| LT6220IS8#PBF | 功能描述:IC OP AMP PREC SGL 60MHZ 8-SOIC 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) |
| LT6220IS8#TR | 功能描述:IC OP AMP PREC SGL 60MHZ 8-SOIC 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) |
| LT6220IS8#TRPBF | 功能描述:IC OP AMP PREC SGL 60MHZ 8-SOIC 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) |
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