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PDF AD8145 Data sheet ( Hoja de datos )
| Número de pieza | AD8145 | |
| Descripción | Triple Differential Receiver | |
| Fabricantes | Analog Devices | |
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Data Sheet
High Speed, Triple Differential Receiver
with Comparators
AD8145
FEATURES
High speed: 500 MHz, 2000 V/µs @ G = 1, VOUT = 2 V p-p
0.1 dB flatness out to 75 MHz
High CMRR: 69 dB @ 10 MHz
High differential input impedance: 1 MΩ
Wide input common-mode range: ±3.5 V (±5 V supplies)
On-chip, gain setting resistors can be configured for gain of 1 or 2
Fast settling: 15 ns to 0.1% @ 2 V p-p
Low input referred noise: 13 nV/√Hz
Disable feature
Small packaging: 32-lead, 5 mm × 5 mm LFCSP
AEC-Q10 qualified (AD8145W)
APPLICATIONS
RGB video receivers
YPbPr video receivers
Keyboard, video, mouse (KVM)
Unshielded twisted pair (UTP) receivers
Qualified for automotive applications
Automotive driver assistance (AD8145W)
Automotive Infotainment (AD8145W)
FUNCTIONAL BLOCK DIAGRAM
32 31 30 29 28 27 26
GND 1
RC
REF_G 2
GAIN_G 3
IN+_G 4
IN–_G 5
C
+
–
RR
+
–
R
AD8145
REF_R 6
GAIN_R 7
GND 8
+
C–
RR
–
B
A
9 10 11 12 13 14 15
25
24 GND
23 OUT_B
22 OUT_G
21 OUT_R
20 VS+
19 COMPB_IN+
18 COMPB_IN–
17 GND
16
Figure 1.
GENERAL DESCRIPTION
The AD8145 is a triple, low cost, differential-to-single-ended
receiver specifically designed for receiving red-green-blue (RGB)
video signals over twisted pair cable or differential printed circuit
board (PCB) traces. It can also be used to receive any type of
analog signal or high speed data transmission. Two auxiliary
comparators with hysteresis are provided that can be used to
decode video sync signals, which are encoded on the received
common-mode voltages, to receive digital signals or as general-
purpose comparators. The AD8145 can be used in conjunction
with the AD8133 or AD8134 triple differential drivers to provide a
complete low cost solution for RGB over Category 5 UTP cable
applications, including KVM.
The excellent common-mode rejection (69 dB @ 10 MHz) of
the AD8145 allows for the use of low cost, unshielded twisted
pair cables in noisy environments.
The AD8145 can be configured for a differential-to-single-ended
gain of 1 or 2 by connecting the GAIN_x pin of each channel to
its respective output (G = 1) or connecting it to a reference voltage
(G = 2), which is normally grounded.
A REF_x input is provided on each channel that allows designers to
level shift the output signals.
The AD8145W is the automotive grade version that is qualified
for use in automotive applications. See the Automotive Products
section for more details.
The AD8145 is available in a 5 mm × 5 mm, 32-lead LFCSP and
is rated to work over the extended industrial temperature range
of −40°C to +105°C.
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2006–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD8145
Parameter
COMPARATOR PERFORMANCE
VOH
VOL
Input Offset Voltage
Hysteresis Width
Input Bias Current
Propagation Delay, tPLH
Propagation Delay, tPHL
Rise Time
Fall Time
POWER-DOWN PERFORMANCE
Power-Down VIH
Power-Down VIL
Power-Down IIH
Power-Down IIL
Power-Down Assert Time
POWER SUPPLY
Operating Range
Quiescent Current, Positive Supply
Quiescent Current, Negative Supply
PSRR, Positive Supply
PSRR, Negative Supply
Conditions
RL = 1 kΩ
AD8145W only, TMIN to TMAX
RL = 1 kΩ
AD8145W only, TMIN to TMAX
10% to 90%
10% to 90%
AD8145W only, TMIN to TMAX
Disabled
AD8145W only, TMIN to TMAX
AD8145W only, TMIN to TMAX
Disabled
AD8145W only, TMIN to TMAX
DC
AD8145W only, TMIN to TMAX
DC
AD8145W only, TMIN to TMAX
Min
3.205
2.950
4.5
−52
−65
−13.9
−20
Typ
3.310
0.390
±2.5
18
1.5
6
6
6
2
VS+ − 1.65
VS+ − 2.65
0.5
−250
1
48.5
16
−43.5
−11
−79
−68
Data Sheet
Max
0.420
0.440
11
57.5
70
19.5
25
−70
−66
−57
−54
Unit
V
V
V
V
mV
mV
µA
ns
ns
ns
ns
V
V
µA
µA
µs
V
mA
mA
mA
mA
mA
mA
mA
mA
dB
dB
dB
dB
Rev. B | Page 4 of 21
5 Page 
AD8145
3
2
1 G=1
0
–1
–2
G=2
–3
–4
–5
–6
VOUT = 0.2V p-p
–7
1
10
100
FREQUENCY (MHz)
1000
Figure 10. Small Signal Frequency Response at Various Gains
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
VOUT = 2V p-p
–0.5
1
G = 1, VS = +5V
G = 1, VS = ±5V
G = 2, VS = +5V
G = 2, VS = ±5V
10 100
FREQUENCY (MHz)
1000
Figure 11. 0.1 dB Flatness for Various Power Supplies and Gains
110
100
90
80
70
60
50
40
30
20
10
0.1
VS = +5V
VS = ±5V
1 10 100
FREQUENCY (MHz)
1000
Figure 12. Common-Mode Rejection vs. Frequency at Various Supplies
Data Sheet
3
2
1
0
–1
–2
–3
–4
–5
–6
VOUT = 2V p-p
–7
1
G=1
G=2
10 100
FREQUENCY (MHz)
1000
Figure 13. Large Signal Frequency Response at Various Gains
1000
100
10
0.01
0.1
1 10 100 1000
FREQUENCY (kHz)
10000 100000
Figure 14. Input Referred Voltage Noise vs. Frequency
4
RL = OPEN CIRCUIT
G=1
3 VS = ±5V
2
1
0
–1
–2
–3
–4
–5 –4 –3 –2 –1 0 1 2 3 4 5
DIFFERENTIAL INPUT VOLTAGE (V)
Figure 15. Differential Input Operating Range
Rev. B | Page 10 of 21
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet AD8145.PDF ] | |
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