參數(shù)資料
型號: LT6222IGN
廠商: LINEAR TECHNOLOGY CORP
元件分類: 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
文件頁數(shù): 13/20頁
文件大?。?/td> 279K
代理商: LT6222IGN
LT6220/LT6221/LT6222
13
sn622012 622012fs
TYPICAL PERFOR U
±
5V Small-Signal Response
Output Overdriven Recovery
50mV/DIV
0V
V
S
=
±
5V
A
V
= 1
R
L
= 1k
50ns/DIV
622012 G39
V
IN
1V/DIV
0V
V
S
= 5V, 0V
A
V
= 2
R
L
= 1k
200ns/DIV
622012 G40
V
2V/DIV
0V
APPLICATIU
Circuit Description
The LT6220/LT6221/LT6222 have an input and output
signal range that covers from the negative power supply to
the positive power supply. Figure 1 depicts a simplified
schematic of the amplifier. The input stage comprises two
differential amplifiers, a PNP stage, Q1/Q2, and an NPN
stage, Q3/Q4, that are active over different ranges of
common mode input voltage. The PNP stage is active
between the negative supply to approximately 1.2V below
the positive supply. As the input voltage moves closer
toward the positive supply, the transistor Q5 will steer the
W
U
U
Q4
Q18
Q17
Q16
Q6
Q3
Q7
Q1
Q15
OUT
Q2
Q11
Q12
Q9
Q5
V
BIAS
I
1
D2
D1
D5
D4
D3
D6
D7
D8
ESDD2
ESDD1
+IN
–IN
V
ESDD3
ESDD4
V
+
V
+
V
R2
R1
R3
R4
R5
622012 F01
+
I
2
+
I
3
C2
C
C
V
+
C1
BUFFER
AND
OUTPUT BIAS
V
+
V
Q19
Q14
Q8
Q13
Q10
Figure 1. LT6220/LT6221/LT6222 Simplified Schematic Diagram
tail current, I
1
, to the current mirror, Q6/Q7, activating the
NPN differential pair and the PNP pair becomes inactive
for the rest of the input common mode range up to the
positive supply. Also, at the input stage, devices Q17 to
Q19 act to cancel the bias current of the PNP input pair.
When Q1/Q2 are active, the current in Q16 is controlled to
be the same as the current Q1/Q2. Thus, the base current
of Q16 is nominally equal to the base current of the input
devices. The base current of Q16 is then mirrored by
devices Q17-Q19 to cancel the base current of the input
devices Q1/Q2.
±
5V Large-Signal Response
0V
V
S
=
±
5V
A
V
= 1
R
L
= 1k
200ns/DIV
622012 G38
2V/DIV
相關PDF資料
PDF描述
LT6220IS5 Single/Dual/Quad 60MHz, 20V/us, Low Power, Rail-to-Rail Input and Output Precision Op Amps
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LT6234IDD 60MHz, Rail-to-Rail Output, 1.9nV / SIGME Hz, 1.15mA Op Amp Family
LT6233IS6 60MHz, Rail-to-Rail Output, 1.9nV / SIGME Hz, 1.15mA Op Amp Family
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相關代理商/技術參數(shù)
參數(shù)描述
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