參數(shù)資料
型號(hào): LT6552CDD#TRPBF
廠商: Linear Technology
文件頁數(shù): 4/16頁
文件大?。?/td> 0K
描述: IC AMP VIDEO DIFF 3.3V 8-DFN
標(biāo)準(zhǔn)包裝: 2,500
應(yīng)用: 差分
電路數(shù): 1
-3db帶寬: 75MHz
轉(zhuǎn)換速率: 600 V/µs
電流 - 電源: 14mA
電流 - 輸出 / 通道: 70mA
電壓 - 電源,單路/雙路(±): 3 V ~ 12.6 V,±1.5 V ~ 6.3 V
安裝類型: 表面貼裝
封裝/外殼: 8-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 8-DFN-EP(3x3)
包裝: 帶卷 (TR)
LT6552
12
6552f
Figure 5. Simplified Schematic
6
7
4
Q2
Q3
Q4
Q5
Q6
Q1
Q7
Q8
Q10
Q11
Q12
Q13
Q14
Q20
Q19
Q9
Q15
Q16
R1
R5
R6
R3
R4
R2
COMPLEMENTARY
DRIVE GENERATOR
Q21
Q22
V+
V
OUT
CM
DESD10
DESD9
5
V+
V
SHDN
DESD12
DESD11
V+
V
DESD2
DESD1
V+
V
DESD4
DESD3
V+
V
DESD8
DESD7
V+
V
DESD6
DESD5
RIN1
RIN2
RIN3
RIN4
+IN
3
–IN
2
REF
1
FB
8
I6
I5
I4
I3
I2
I1
Q18
Q17
6552 FO5
BIAS
Amplifier Characteristics
Figure 5 shows a simplified schematic of the LT6552.
There are two input stages; the first one consists of
transistors Q1 to Q8 for the (+) and (–) inputs while the
second input stage consists of transistors Q9 to Q16 for
the reference and feedback inputs. This topology provides
high slew rates at low supply voltages. The input common
mode range extends from ground to typically 1.75V from
VCC, and is limited by 2VBE’s plus a saturation voltage of
current sources I1-I4. Each input stage drives the degen-
eration resistors of PNP and NPN current mirrors, Q17 to
Q20, that convert the differential signals into a single-
ended output. The complementary drive generator sup-
plies current to the output transistors that swing from rail-
to-rail.
The current generated through R1 or R2, divided by the
capacitor CM, determines the slew rate. Note that this
current, and hence the slew rate, are proportional to the
magnitude of the input step. The input step equals the
output step divided by the closed-loop gain. The highest
slew rates are therefore obtained in the lowest gain con-
figurations. The Typical Performance Characteristic Curve
of Slew Rate vs Closed-Loop Gain shows the details.
ESD
The LT6552 has reverse-biased ESD protection diodes on
all inputs and outputs, as shown in Figure 5. If these pins
are forced beyond either supply, unlimited current will
flow through these diodes. If the current is transient in
nature and limited to 100mA or less, no damage to the
device will occur.
APPLICATIO S I FOR ATIO
WU
UU
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LT6552CS8PBF 制造商:Linear Technology 功能描述:LT6552 600V/us video difference SOIC amp