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PDF LT6552CDD Data sheet ( Hoja de datos )
| Número de pieza | LT6552CDD | |
| Descripción | 3.3V Single Supply Video Difference Amplifier | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
s Differential or Single-Ended Gain Block
s Wide Supply Range 3V to 12.6V
s Output Swings Rail-to-Rail
s Input Common Mode Range Includes Ground
s 600V/µs Slew Rate
s –3dB Bandwidth = 75MHz, AV = ±2
s CMRR at 10MHz: >60dB
s Specified on 3.3V, 5V and ±5V Supplies
s High Output Drive: ±70mA
s Power Shutdown to 300µA
s Operating Temperature Range: –40°C to 85°C
s Available in 8-Lead SO and
Tiny 3mm x 3mm x 0.8mm DFN Packages
U
APPLICATIO S
s Differential to Single-Ended Conversion
s Video Line Driver
s Automotive Displays
s RGB Amplifiers
s Coaxial Cable Drivers
s Low Voltage High Speed Signal Processing
TYPICAL APPLICATIO
Cable Sense Amplifier for Loop Through
Connections with DC Adjust
VIN
CABLE
5V
3+ 7
VDC
2
1
– LT6552
REF
8 FB
4
6 75Ω
VOUT
75Ω
RF
500Ω
RG
500Ω
CF
8pF
6552 TA01a
LT6552
3.3V Single Supply
Video Difference Amplifier
DESCRIPTIO
The LT®6552 is a video difference amplifier optimized for
low voltage single supply operation. This versatile ampli-
fier features uncommitted high input impedance (+) and
(–) inputs and can be used in differential or single-ended
configurations. A second set of inputs gives gain adjust-
ment and DC control to the differential amplifier.
On a single 3.3V supply, the input voltage range extends
from ground to 1.3V and the output swings from ground
to 2.9V while driving a 150Ω load. The LT6552 features
75MHz – 3dB bandwidth, 600V/µs slew rate, and ±70mA
output current making it ideal for driving cables directly.
The LT6552 maintains its performance for supplies from
3V to 12.6V and is fully specified at 3.3V, 5V and ±5V
supplies. The shutdown feature reduces power dissipa-
tion to less than 1mW and allows multiple amplifiers to
drive the same cable.
The LT6552 is available in the 8-lead SO package as well
as a tiny, dual fine pitch leadless package (DFN). The
device is specified over the commercial and industrial
temperature ranges.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Input Referred CMRR vs Frequency
100
VS = 5V, 0V
90 VCM = 0V DC
80
70
60
50
40
30
20
10
100k
1 10
FREQUENCY (MHz)
100
6552 TA01b
6552f
1
1 page  
LT6552
5V ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range,
VDIFF = 0V, VSHDN =
otherwise specifications are at
V+, unless otherwise noted. RL
TA =
= RF
25°C. VS =
+ RG = 1k.
5V, 0V. Figure
(Note 6)
1
shows
the
DC
test
circuit,
VREF
=
VCM
=
1V,
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
tON Turn-On Time
VSHDN from 0.5V to 4.7V
250
tOFF Turn-Off Time
VSHDN from 4.7V to 0.5V
450
Shutdown Output Leakage Current
VSHDN = 0.5V, 0V ≤ VOUT ≤ V+
q 0.25
ns
ns
µA
±5V ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operat-
ing temperature range,
VDIFF = 0V, VSHDN = V+,
otherwise specifications
unless otherwise noted.
are at TA
RL = RF +
= 25°C. VS = ±5V.
RG = 1k. (Note 6)
Figure
2
shows
the
DC
test
circuit,
VREF
=
VCM
=
0V,
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VOS
Input Offset Voltage
Both Inputs (Note 7)
10 25
mV
q 30 mV
∆VOS/∆T
IB
IOS
en
in
RIN
CMRR
Input VOS Drift
Input Bias Current
Input Offset Current
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
Common Mode Rejection Ratio
Input Range
Any Input
Either Input Pair
f = 10kHz
f = 10kHz
Common Mode, VCM = –5V to 3V
VCM = –5V to 3V
q 50
µV/°C
q
25 50
µA
q
15
µA
55 nV/√Hz
0.7 pA/√Hz
300 kΩ
q 58
75
dB
q –5
3V
PSRR
GE
SR
FPBW
BW
tr, tf
tS
ISC
IS
Power Supply Rejection
Gain Error
Output Voltage Swing
Slew Rate
Full-Power Bandwidth
Small-Signal –3dB Bandwidth
Rise Time, Fall Time
Settling Time to 3%
Settling Time to 1%
Differential Gain
Differential Phase
Short-Circuit Current
Supply Current Shutdown
Supply Current
VS = ±2V to ±6V, VCM = 0V
q 48
VO = –3V to 3V, RL = 1k
RL = 150Ω
q
q
(VDIFF = ± 0.6V), VREF (Pin 1) = 0V, AV = 10
RL = 1k
RL = 150Ω
RL = 75Ω, 0°C ≤ TA ≤ 70°C (Only)
q ±4.8
q ±3.6
q ±2.75
VCM = 0V, VDIFF = –1.5V to +1.5V,
VO = –5V to 5V Measure from –2V to 2V, RL = 150Ω
400
VO = 6VP-P (Note 9)
AV = 2, RL = 150Ω
AV = 50, VO = –3V to 3V, 20% to 80%
AV = 2, ∆VOUT = 6V, Positive Step
RL = 150Ω
AV = 2, RL = 150Ω, Output Black Level = 0V
AV = 2, RL = 150Ω, Output Black Level = 0V
VOUT = 0V, VDIFF = ±1V
0°C ≤ TA ≤ 70°C
–40°C ≤ TA ≤ 85°C
50
q 45
q 35
VSHDN = –4.5V
q
q
54
1
1
±4.875
±4.3
±3.4
600
30
75
125
25
35
0.2
0.15
70
650
14
3
3
175
1400
16.5
18.5
dB
%
%
V
V
V
V/µs
MHz
MHz
ns
ns
ns
%
Deg
mA
mA
mA
µA
mA
mA
VL Shutdown Pin Input Low Voltage
VH Shutdown Pin Input High Voltage
q
q 4.7
–4.5 V
V
6552f
5
5 Page 
LT6552
APPLICATIO S I FOR ATIO
The LT6552 is a video difference amplifier with two pairs
of high impedance inputs. The primary purpose of the
LT6552 is to convert high frequency differential signals
into a single-ended output, while rejecting any common
mode noise. In the simplest configuration, one pair of
inputs is connected to the incoming differential signal,
while the other pair of inputs is used to set amplifier gain
and DC level. The device will operate on either single or
dual supplies and has an input common mode range
which includes the negative supply. The common mode
rejection ratio is greater than 60dB at 10MHz. Feedback is
applied to Pin 8 and the LT6552’s transient response is
optimized for gains of 2 or greater.
Figure 3 shows the single supply connection. The ampli-
fier gain is set by a feedback network from the output to
Pin 8 (FB). A DC signal applied to Pin 1 (REF) establishes
the output quiescent voltage and the differential signal is
applied to Pins 2 and 3.
Figure 4 shows several other connections using dual
supplies. In each case, the amplifier gain is set by a
feedback network from the output to Pin 8 (FB).
VINDIFF
VDC
SHDN
V+
3+ 5 7
2
1
– LT6552
REF
8 FB
4
6
VO
RF
VO
RG
=
(VINDIFF
+
VDC)
RF + RG
RG
6552 F01
Figure 3
SHDN
V+
VIN
3+ 5 7
2
1
– LT6552
REF
6
VO
8 FB
4
V–
RF
( (RG
VO = +
RF + RG
RG
VIN
SHDN
V+
3+ 5 7
VIN
2
1
– LT6552
REF
8 FB
4
V–
RF
VINDIFF
6
VO
RG
VIN
SHDN
V+
3+ 5 7
2
1
– LT6552
REF
8 FB
4
V–
RF
6
VO
( (RG
VO = –
RF + RG
RG
VIN
( ( ( (VO =
RF + RG
RG
VINDIFF –
RF
RG
VIN
6552 F01
Figure 4
6552f
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LT6552CDD.PDF ] | |
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