- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377727 > LT6600-10 (Linear Technology Corporation) Very Low Noise, Differential Amplifier and 10MHz Lowpass Filter PDF資料下載
參數(shù)資料
| 型號(hào)： | LT6600-10 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Very Low Noise, Differential Amplifier and 10MHz Lowpass Filter |
| 中文描述： | 極低噪聲，差分放大器和10MHz低通濾波器 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 221K |
| 代理商： | LT6600-10 |
LT6600-10
8
6600f
APPLICATIU
W
U
U
the passband flatness near 10MHz. The common mode
output voltage is set to 2V.
Use Figure 4 to determine the interface between the
LT6600-10 and a current output DAC. The gain, or “trans-
impedance”, is defined as A = V
OUT
/I
IN
. To compute the
transimpedance, use the following equation:
A
R
R
R
=
+
402
1
1
2
By setting R1 + R2 = 402
, the gain equation reduces to
A = R1
.
The voltage at the pins of the DAC is determined by R1,
R2, the voltage on Pin 7 and the DAC output current (I
IN+
or I
IN–
). Consider Figure 4 with R1 = 49.9
and R2 =
348
. The voltage at Pin 7 is 1.65V. The voltage at the
DAC pins is given by:
V
V
R
2
R
R
43 6
I
R
R
R
R
mV I
DAC
PIN
IN
IN
=
+
+
+
+
=
7
1
1
402
1
1
2
2
103
.
I
IN
is
I
IN–
or
I
IN+
.The transimpedance in this example is
50.4
.
Figure 5 is a laboratory setup that can be used to charac-
terize the LT6600-10 using single-ended instruments with
50
source impedance and 50
input impedance. For a
unity gain configuration the LT6600-10 requires a 402
source resistance yet the network analyzer output is
calibrated for a 50
load resistance. The 1:1 transformer,
53.6
and 388
resistors satisfy the two constraints
above. The transformer converts the single-ended source
into a differential stimulus. Similarly, the output the
LT6600-10 will have lower distortion with larger load
resistance yet the analyzer input is typically 50
. The 4:1
turns (16:1 impedance) transformer and the two 402
resistors of Figure 5, present the output of the LT6600-10
with a 1600
differential load, or the equivalent of 800
to ground at each output. The impedance seen by the
network analyzer input is still 50
, reducing reflections in
the cabling between the transformer and analyzer input.
Figure 5
–
+
0.1
μ
F
0.01
μ
F
R2
3.3V
–
+
LT6600-10
3
4
V
OUT+
I
IN+
I
IN–
V
OUT–
1
7
2
8
5
6
6600 F04
CURRENT
OUTPUT
DAC
R1
R1
R2
Figure 4
Evaluating the LT6600-10
The low impedance levels and high frequency operation of
the LT6600-10 require some attention to the matching
networks between the LT6600-10 and other devices. The
previous examples assume an ideal (0
) source imped-
ance and a large (1k
) load resistance. Among practical
examples where impedance must be considered is the
evaluation of the LT6600-10 with a network analyzer.
–
+
0.1
μ
F
0.1
μ
F
2.5V
–2.5V
–
+
LT6600-10
3
4
1
7
2
8
5
6
6600 F05
402
402
NETWORK
ANALYZER
INPUT
50
COILCRAFT
TTWB-16A
4:1
NETWORK
ANALYZER
SOURCE
COILCRAFT
TTWB-1010
1:1
50
53.6
388
388
Differential and Common Mode Voltage Ranges
The differential amplifiers inside the LT6600-10 contain
circuitry to limit the maximum peak-to-peak differential
voltage through the filter. 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
2V
P-P
and it becomes noticeable above 3.5V
P-P
. This is
illustrated in Figure 6; the LTC6600-10 was configured
with unity passband gain and the input of the filter was
driven with a 1MHz signal. Because this voltage limiting
takes place well before the output stage of the filter
reaches the supply rails, the input/output behavior of the
IC shown in Figure 6 is relatively independent of the power
supply voltage.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT6600CS8-10 | Very Low Noise, Differential Amplifier and 10MHz Lowpass Filter |
| LT6600IS8-10 | Very Low Noise, Differential Amplifier and 10MHz Lowpass Filter |
| LT6600-20 | Very Low Noise, Differential Amplifier and 20MHz Lowpass Filter |
| LT6600CS8-20 | Very Low Noise, Differential Amplifier and 20MHz Lowpass Filter |
| LT6600IS8-20 | Very Low Noise, Differential Amplifier and 20MHz Lowpass Filter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT6600-15 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Very Low Noise, Differential Amplifi er and 15MHz Lowpass Filter |
| LT6600-2.5 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Very Low Noise, Differential Amplifi er and 2.5MHz Lowpass Filter |
| LT6600-2.5_09 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Very Low Noise, Differential Amplifi er and 2.5MHz Lowpass Filter |
| LT6600-20 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Very Low Noise, Differential Amplifier and 20MHz Lowpass Filter |
| LT6600-5 | 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。