參數(shù)資料
型號(hào)： LT6222CGN
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 音頻／視頻放大
英文描述： Single/Dual/Quad 60MHz, 20V/us, Low Power, Rail-to-Rail Input and Output Precision Op Amps
中文描述： 1 CHANNEL, VIDEO AMPLIFIER, PDSO16
封裝： 0.150 INCH, PLASTIC, SSOP-16
文件頁(yè)數(shù)： 16/20頁(yè)
文件大小： 279K
代理商： LT6222CGN
LT6220/LT6221/LT6222
16
sn622012 622012fs
U
PACKAGE DESCRIPTIO
As the signal level increases though, the output of the op
amp goes more negative. At 12.5
μ
A of photodiode cur-
rent, the 100k
gain dictates that the LT6220 output will
be about 1.25V below ground. However, at that point the
emitter of Q2 will be at ground, and the base of Q1 will be
1V below ground. Thus, Q1 turns on and photodiode
current starts to flow through R2. The transimpedance
gain is therefore now reduced to R1||R2, or about 3.1k
.
The circuit response is shown in Figure 3. Note the smooth
transition between the two operating gains, as well as the
linearity.
Differential-In/Differential-Out Amplifier
The circuit of Figure 6 shows the LT6222 applied as a
buffered differential-in differential-out amplifier with a
gain of 2. Op amps A and B are configured as simple unity-
gain buffers, offering high input impedance to upstream
circuitry. Resistors R1 and R2 perform an averaging
function on the common mode input voltage and R3
attenuates it by a factor of 2/3 and references it to the
voltage source V
OCM
. The resultant voltage, V
MID
= 2/3
V
ICM
, is placed at the noninverting inputs of op amps C and
D. The other four resistors set gains of +3 from the
noninverting input and –2 through the inverting path. Thus
the output voltage of the upper path is:
–OUT = 3 (2/3 V
ICM
+ 1/3 V
OCM
) – 2
(V
ICM
+ V
DIFF
/2)
= 2V
ICM
+ V
OCM
– 2V
ICM
– V
DIFF
= V
OCM
– V
DIFF
Figure 4. 3V, 1MHz, 4th Order Butterworth Filter
Figure 5. Frequency Response of Filter
Figure 3. Stepped-Gain Photodiode Amplifier Response
PHOTO
CURRENT
100
μ
A/DIV
V
0.5V/DIV
5
μ
s/DIV
622012 F03
Single 3V Supply, 1MHz, 4th Order Butterworth Filter
The circuit shown in Figure 4 makes use of the low voltage
operation and the wide bandwidth of the LT6221 to create
a DC accurate 1MHz 4th order lowpass filter powered from
a 3V supply. The amplifiers are configured in the inverting
mode for the lowest distortion and the output can swing
rail-to-rail for maximum dynamic range. Figure 5 displays
the frequency response of the filter. Stopband attenuation
is greater than 100dB at 50MHz.
–
1/2 LT6221
+
47pF
220pF
V
IN
V
S
/2
909
2.67k
909
–
1/2 LT6221
+
22pF
V
OUT
470pF
622012 F04
1.1k
2.21k
3V
1.1k
FREQUENCY (Hz)
–80
G
–40
0
–100
–60
–20
20
1k
100k
1M
10M
100M
622012 F05
–120
10k
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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LT6222CGN#TR 功能描述:IC OP AMP PREC QUAD 60MHZ 16SSOP RoHS:否 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類(lèi)型:J-FET 電路數(shù):2 輸出類(lèi)型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件
LT6222CGN#TRPBF 功能描述:IC OP AMP PREC LOWPWR R-R 16SSOP RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類(lèi)型:J-FET 電路數(shù):2 輸出類(lèi)型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件
LT6222CGNPBF 制造商:Linear Technology 功能描述:LT6222 quad 60MHz 20V/us LP SSOP op amp
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