參數(shù)資料
型號(hào): AD8067ART-REEL7
廠商: Analog Devices Inc
文件頁(yè)數(shù): 13/25頁(yè)
文件大?。?/td> 0K
描述: IC OPAMP VF R-R PREC LN SOT23-5
標(biāo)準(zhǔn)包裝: 1
系列: FastFET™
放大器類型: 電壓反饋
電路數(shù): 1
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 640 V/µs
-3db帶寬: 54MHz
電流 - 輸入偏壓: 0.6pA
電壓 - 輸入偏移: 200µV
電流 - 電源: 6.6mA
電流 - 輸出 / 通道: 26mA
電壓 - 電源,單路/雙路(±): 5 V ~ 24 V,±2.5 V ~ 12 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: SC-74A,SOT-753
供應(yīng)商設(shè)備封裝: SOT-23-5
包裝: 剪切帶 (CT)
其它名稱: AD8067ART-REEL7CT
Data Sheet
AD8067
Rev. B | Page 19 of 24
Test data for the preamp is shown in Figure 52 and Figure 53.
FREQUENCY – MHz
TRANSIMPEDANCE
GAIN
dB
100
65
70
75
80
85
90
95
60
0.01
0.1
1
10
100
Figure 52. Photodiode Preamplifier Frequency Response
M 50ns CH1
830mV
CH1 500mV
C1 RISE
31.2ns
C1 FALL
31.6ns
T
Figure 53. Photodiode Preamplifier Pulse Response
USING THE AD8067 AT GAINS OF LESS THAN 8
A common technique used to stabilize de-compensated
amplifiers is to increase the noise gain, independent of the
signal gain. The AD8067 can be used in applications where the
signal gain is less than 8, if proper care is taken to ensure that
the noise gain of the amplifier is set to at least the recommended
minimum signal gain of 8 (see Figure 54).
The signal and noise gain equations for a noninverting
amplifier are:
R1
R3
Gain
Signal
+
= 1
R1
R3
Gain
Noise
+
=1
The addition of resistor R2 modifies the noise gain equation.
Note the signal gain equation has not changed.
R2
R1
R3
Gain
Noise
||
1 +
=
AD8067
C2
0.1
F
C1
10
F
+5V
R2
50
C3
10
F
C4
0.1
F
–5V
VOUT
RL
R4
51
R3
600
VIN
1
5
4
3
2
R1
301
Figure 54. Gain = 3 Schematics
This technique allows the designer to use the AD8067 in gain
configurations of less than 8. The drawback to this type of
compensation is that the input noise and offset voltages are
also amplified by the value of the noise gain. In addition, the
distortion performance is degraded. To avoid excessive
overshoot and ringing when driving a capacitive load, the
AD8067 should be buffered by a small series resistor; in this
case, a 51 Ω resistor was used.
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