参数资料
| 型号： | LT6600IS8-20 |
| 厂商： | Linear Technology |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC AMP DIFF LP FLTR 20MHZ 8-SOIC |
| 标准包装： | 100 |
| 放大器类型： | 差分 |
| 电路数： | 1 |
| 输出类型： | 差分 |
| 电流 - 输入偏压： | 50µA |
| 电压 - 输入偏移： | 10000µV |
| 电流 - 电源： | 46mA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 11 V，±1.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 管件 |
LT6600-20
8
66002fb
APPLICATIONS INFORMATION
In Figure 3 the LT6600-20 is providing 12dB of gain. The
gain resistor has an optional 62pF in parallel to improve
the passband atness near 20MHz. The common mode
output voltage is set to 2V.
Use Figure 4 to determine the interface between the
LT6600-20 and a current output DAC. The gain, or “trans-
impedance,” is dened as A = VOUT/IIN. To compute the
transimpedance, use the following equation:
A
=
402 R1
R1
+R2
()
Ω
()
By setting R1 + R2 = 402Ω, the gain equation reduces
to A = R1(Ω).
The voltage at the pins of the DAC is determined by R1, R2,
the voltage on Pin 7 and the DAC output current. Consider
Figure 4 with R1 = 49.9Ω and R2 = 348Ω. The voltage at
Pin 7 is 1.65V. The voltage at the DAC pins is given by:
VDAC = VPIN7
R1
+R2+ 402
+IIN
R1R2
R1
+R2
= 26mV +IIN 48.3Ω
IIN is IIN+ or IIN–. The transimpedance in this example is
50.4Ω.
Evaluating the LT6600-20
The low impedance levels and high frequency operation
ofthe LT6600-20 require some attention to the matching
networks between the LT6600-20 and other devices. The
previous examples assume an ideal (0Ω) source impedance
and a large (1kΩ) load resistance. Among practical ex-
amples where impedance must be considered is the evalu-
ation of the LT6600-20 with a network analyzer. Figure 5
is a laboratory setup that can be used to characterize
the LT6600-20 using single-ended instruments with 50
source impedance and 50Ω input impedance. For a unity
gain conguration the LT6600-20 requires a 402Ω source
resistance yet the network analyzer output is calibrated
for a 50Ω load resistance. The 1:1 transformer, 53.6Ω
and 388Ω resistors satisfy the two constraints above.
The transformer converts the single-ended source into a
differential stimulus. Similarly, the output of the LT6600-20
will have lower distortion with larger load resistance yet
the analyzer input is typically 50Ω. The 4:1 turns (16:1
impedance) transformer and the two 402Ω resistors of
Figure 5, present the output of the LT6600-20 with a 1600Ω
differential load, or the equivalent of 800Ω to ground at
each output. The impedance seen by the network analyzer
input is still 50Ω, reducing reections in the cabling be-
tween the transformer and analyzer input.
Differential and Common Mode Voltage Ranges
The differential ampliers inside the LT6600-20 contain
circuitry to limit the maximum peak-to-peak differential
voltage through the lter. This limiting function prevents
excessive power dissipation in the internal circuitry and
provides output short-circuit protection. The limiting
function begins to take effect at output signal levels above
2VP-P and it becomes noticeable above 3.5VP-P. This is
illustrated in Figure 6; the LT6600-20 was congured with
unity passband gain and the input of the lter was driven
with a 1MHz signal. Because this voltage limiting takes
Figure 4
Figure 5
–
+
0.1μF
3.3V
–
+
LT6600-20
3
4
1
0.01μF
CURRENT
OUTPUT
DAC
7
2
8
5
VOUT
+
VOUT
–
66002 F04
6
R2
R1
IIN
–
IIN
+
R2
R1
–
+
0.1μF
2.5V
–2.5V
–
+
LT6600-20
3
4
1
7
2
8
5
6
66002 F05
402Ω
NETWORK
ANALYZER
INPUT
50Ω
COILCRAFT
TTWB-16A
4:1
NETWORK
ANALYZER
SOURCE
COILCRAFT
TTWB-1010
1:1
50Ω
53.6Ω
388Ω
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| LT6600IS8-20#PBF | 功能描述:IC AMP DIFF LP FLTR 20MHZ 8-SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 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 |
| LT6600IS8-20#TR | 功能描述:IC AMP DIFF LP FLTR 20MHZ 8-SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:73 系列:Over-The-Top® 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.07 V/µs 增益带宽积:200kHz -3db带宽:- 电流 - 输入偏压:1nA 电压 - 输入偏移:285µV 电流 - 电源:50µA 电流 - 输出 / 通道:25mA 电压 - 电源，单路/双路(±):2 V ~ 44 V，±1 V ~ 22 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-WFDFN 裸露焊盘 供应商设备封装:16-DFN-EP（5x3） 包装:管件 |
| LT6600IS8-20#TRPBF | 功能描述:IC AMP DIFF LP FLTR 20MHZ 8-SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:73 系列:Over-The-Top® 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.07 V/µs 增益带宽积:200kHz -3db带宽:- 电流 - 输入偏压:1nA 电压 - 输入偏移:285µV 电流 - 电源:50µA 电流 - 输出 / 通道:25mA 电压 - 电源，单路/双路(±):2 V ~ 44 V，±1 V ~ 22 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-WFDFN 裸露焊盘 供应商设备封装:16-DFN-EP（5x3） 包装:管件 |
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