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參數(shù)資料
| 型號： | LT6600IS8-20#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 11/12頁 |
| 文件大小： | 0K |
| 描述： | IC AMP DIFF LP FLTR 20MHZ 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 放大器類型： | 差分 |
| 電路數(shù)： | 1 |
| 輸出類型： | 差分 |
| 電流 - 輸入偏壓： | 50µA |
| 電壓 - 輸入偏移： | 10000µV |
| 電流 - 電源： | 46mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 11 V，±1.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
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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| LT6600IS8-5 | 制造商:Linear Technology 功能描述:Differential Amplifier and Low Pass Filter 8-Pin SOIC N |
| LT6600IS8-5#PBF | 功能描述:IC AMP DIFF LP FLTR 5MHZ 8-SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
| LT6600IS8-5#TRPBF | 功能描述:IC AMP DIFF LP FLTR 5MHZ 8-SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:73 系列:Over-The-Top® 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.07 V/µs 增益帶寬積:200kHz -3db帶寬:- 電流 - 輸入偏壓:1nA 電壓 - 輸入偏移:285µV 電流 - 電源:50µA 電流 - 輸出 / 通道:25mA 電壓 - 電源，單路/雙路(±):2 V ~ 44 V，±1 V ~ 22 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:16-DFN-EP（5x3） 包裝:管件 |
| LT6600IS8-5-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Very Low Noise, Differential Amplifi er and 5MHz Lowpass Filter |
| LT6600IS8-5-TR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Very Low Noise, Differential Amplifi er and 5MHz Lowpass Filter |
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