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参数资料
| 型号： | LT6600IS8-5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC AMP DIFF LP FLTR 5MHZ 8-SOIC |
| 标准包装： | 2,500 |
| 放大器类型： | 差分 |
| 电路数： | 1 |
| 输出类型： | 差分 |
| 电流 - 输入偏压： | 30µA |
| 电压 - 输入偏移： | 8000µV |
| 电流 - 电源： | 30mA |
| 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： | 带卷 (TR) |
LT6600-5
8
66005fb
APPLICATIONS INFORMATION
the passband atness near 5MHz. The common mode
output voltage is set to 2V.
Use Figure 4 to determine the interface between the
LT6600-5 and a current output DAC. The gain, or “tran-
simpedance,” is dened as A = VOUT/IIN Ω. To compute
the transimpedance, use the following equation:
A
=
806 R1
R1
+R2
Ω
By setting R1 + R2 = 806Ω, the gain equation reduces
to A = R1Ω.
The voltage at the pins of the DAC is determined by R1,
R2, the voltage on Pin 7 and the DAC output current
(IIN+ or IIN–). Consider Figure 4 with R1 = 49.9Ω and R2
= 750Ω. The voltage at Pin 7 is 1.65V. The voltage at the
DAC pins is given by:
V
DAC = VPIN7
R1
+R2+806
+I
IN
R1 R2
R1
+R2
= 51mV +I
IN 46.8Ω
IIN is IIN– or IIN+. The transimpedance in this example is
50.3Ω.
Figure 4
–
+
0.1μF
0.01μF
3.3V
–
+
LT6600-5
3
4
VOUT
+
IIN
+
IIN
–
VOUT
–
1
7
2
8
5
6
66005 F04
CURRENT
OUTPUT
DAC
R1
R2
Evaluating the LT6600-5
The low impedance levels and high frequency operation
of the LT6600-5 require some attention to the matching
networks between the LT6600-5 and other devices. The
previous examples assume an ideal (0Ω) source imped-
ance and a large (1kΩ) load resistance. Among practi-
cal examples where impedance must be considered is
the evaluation of the LT6600-5 with a network analyzer.
Figure 5 is a laboratory setup that can be used to character-
ize the LT6600-5 using single-ended instruments with 50Ω
source impedance and 50Ω input impedance. For a unity
gain conguration the LT6600-5 requires a 806Ω source
resistance yet the network analyzer output is calibrated
for a 50Ω load resistance. The 1:1 transformer, 51.1Ω
and 787Ω resistors satisfy the two constraints above.
The transformer converts the single-ended source into a
differential stimulus. Similarly, the output the LT6600-5
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 LT6600-5 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 LT6600-5 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 LTC6600-5 was congured with
unity passband gain and the input of the lter was driven
with a 1MHz signal. Because this voltage limiting takes
place well before the output stage of the lter reaches the
supply rails, the input/output behavior of the IC shown
in Figure 6 is relatively independent of the power supply
voltage.
Figure 5
–
+
0.1μF
2.5V
–2.5V
–
+
LT6600-5
3
4
1
7
2
8
5
6
66005 F05
402Ω
NETWORK
ANALYZER
INPUT
50Ω
COILCRAFT
TTWB-16A
4:1
NETWORK
ANALYZER
SOURCE
COILCRAFT
TTWB-1010
1:1
50Ω
51.1Ω
787Ω
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| LT6604CUFF-10#PBF | 功能描述:IC AMP DIFF LN DUAL 34-QFN RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 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-SOIC 包装:带卷 (TR) |
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