Data Sheet
FEATURES
High Speed, Triple Differential Receiver
with Comparators
AD8145
FUNCTIONAL BLOCK DIAGRAM
GAIN_B
DIS/PD
REF_B
IN+_B
IN–_B
GND
GND
25
24
32
31
30
29
28
27
26
REF_G
GAIN_G
IN+_G
IN–_G
REF_R
2
C
R
+
–
R
R
3
4
+
–
5
6
C
R
+
–
R
–
11
12
13
14
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)
GAIN_R
GND
7
+
8
9
10
GND
IN+_R
IN–_R
COMPA_IN+
COMPA_IN–
COMPA_OUT
COMPB_OUT
GND
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
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
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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.
Trademarks and registered trademarks are the property of their respective owners.
06307-001
–
–
High speed: 500 MHz, 2000 V/µs @ G = 1, V
OUT
= 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)
GND
1
R
C
V
S–
GND
OUT_B
OUT_G
OUT_R
V
S+
COMPB_IN+
COMPB_IN–
GND
+
+
23
22
21
AD8145
B
A
20
19
18
17
15
16
AD8145* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
View a parametric search of comparable parts.
DESIGN RESOURCES
•
AD8145 Material Declaration
•
PCN-PDN Information
•
Quality And Reliability
•
Symbols and Footprints
EVALUATION KITS
•
AD8145 Evaluation Board
DOCUMENTATION
Data Sheet
•
AD8145: High Speed, Triple Differential Receiver with
Comparators Data Sheet
User Guides
•
UG-862: Evaluation Board for the AD8143/AD8145 High
Speed, Triple Differential Receivers with Comparators
DISCUSSIONS
View all AD8145 EngineerZone Discussions.
SAMPLE AND BUY
Visit the product page to see pricing options.
TECHNICAL SUPPORT
Submit a technical question or find your regional support
number.
TOOLS AND SIMULATIONS
•
AD8145 SPICE Macro Model
DOCUMENT FEEDBACK
Submit feedback for this data sheet.
This page is dynamically generated by Analog Devices, Inc., and inserted into this data sheet. A dynamic change to the content on this page will not
trigger a change to either the revision number or the content of the product data sheet. This dynamic page may be frequently modified.
AD8145
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 7
Thermal Resistance ...................................................................... 7
Maximum Power Dissipation ..................................................... 7
ESD Caution .................................................................................. 7
Pin Configuration and Function Description .............................. 8
Typical Performance Characteristics ............................................. 9
Theory of Operation ...................................................................... 14
Data Sheet
Applications Information .............................................................. 15
Overview ..................................................................................... 15
Basic Closed-Loop Gain Configurations ................................ 15
Terminating the Input................................................................ 16
Input Clamping........................................................................... 17
PCB Layout Considerations ...................................................... 18
Driving a Capacitive Load......................................................... 19
Power-Down ............................................................................... 19
Comparators ............................................................................... 19
Sync Pulse Extraction Using Comparators ............................. 20
Outline Dimensions ....................................................................... 21
Ordering Guide .......................................................................... 21
Automotive Products ................................................................. 21
REVISION HISTORY
12/14—Rev. A to Rev. B
Changes to Applications Section and General Description
Section ................................................................................................ 1
Changes to Figure 3 and Table 5 ..................................................... 8
Changes to Figure 45 ...................................................................... 21
Updated Outline Dimensions ....................................................... 21
Changes to Ordering Guide .......................................................... 21
Moved Automotive Products Section .......................................... 21
Changes to Automotive Products Section................................... 21
1/10—Rev. 0 to Rev. A
Changes to Features Section, Applications Section, and General
Description Section .......................................................................... 1
Changes to Table 1 ............................................................................ 3
Changes to Table 2 ............................................................................ 5
Added Automotive Products Section .......................................... 19
Added Exposed Paddle Notation to Outline Dimensions ........ 21
Changes to Ordering Guide .......................................................... 21
10/06—Revision 0: Initial Version
Rev. B | Page 2 of 21
Data Sheet
SPECIFICATIONS
T
A
= 25°C, V
S
= ±5 V, REF_x = 0 V, R
L
= 150 Ω, C
L
= 2 pF, G = 1, T
MIN
to T
MAX
= −40°C to +105°C, unless otherwise noted.
Table 1.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
Conditions
V
OUT
= 0.2 V p-p
V
OUT
= 2 V p-p
V
OUT
= 0.2 V p-p, G = 2
V
OUT
= 2 V p-p, G = 2
V
OUT
= 2 V p-p
V
OUT
= 2 V p-p, G = 2
V
OUT
= 2 V p-p
V
OUT
= 2 V p-p, G = 2
V
OUT
= 2 V p-p, 0.1%
Min
Typ
530
500
200
200
75
100
2100
2100
15
20
−67
−88
−62
13
0.25
0.1
81
78
90
69
41
±3.5
±2.5
1
1.3
1
2
1.955
1.930
−17.5
−25
−6
−7
−400
−650
−3.64
−3.45
50
+195/−230
1.985
+7.0
−18
−3.4
25
−65
2.020
2.030
+1.0
+8.0
−0.9
−0.5
+300
+650
+3.55
+3.35
Max
AD8145
Unit
MHz
MHz
MHz
MHz
MHz
MHz
V/µs
V/µs
ns
ns
dBc
dBc
dB
nV/√Hz
%
Degrees
dB
dB
dB
dB
V
V
MΩ
MΩ
pF
pF
V/V
V/V
mV
mV
µV/°C
µA
µA
nA/°C
nA
nA
V
V
mA
mA
Bandwidth for 0.1 dB Flatness
Slew Rate
Settling Time
Output Overdrive Recovery
NOISE/DISTORTION
Second Harmonic
Third Harmonic
Crosstalk
Input Voltage Noise (RTI)
Differential Gain Error
Differential Phase Error
INPUT CHARACTERISTICS
Common-Mode Rejection
V
OUT
= 2 V p-p, 1 MHz
V
OUT
= 2 V p-p, 1 MHz
V
OUT
= 2 V p-p, 10 MHz
f ≥ 10 kHz
NTSC, 200 IRE, R
L
≥ 150 Ω
NTSC, 200 IRE, R
L
≥ 150 Ω
DC, V
CM
= −2 V to +2 V
AD8145W
only, T
MIN
to T
MAX
V
CM
= 1 V p-p, f = 10 MHz
V
CM
= 1 V p-p, f = 100 MHz
V
+IN
− V
−IN
= 0 V
Differential
Common mode
Differential
Common mode
DC, G = 2
AD8145W
only, T
MIN
to T
MAX
G=2
AD8145W
only, T
MIN
to T
MAX
T
MIN
to T
MAX
AD8145W
only, T
MIN
to T
MAX
T
MIN
to T
MAX
(+IN, −IN)
AD8145W
only, T
MIN
to T
MAX
Common-Mode Voltage Range
Differential Operating Range
Resistance
Capacitance
DC PERFORMANCE
Closed-Loop Gain
Output Offset Voltage
Output Offset Voltage Drift
Input Bias Current (+IN, −IN)
Input Bias Current Drift
Input Offset Current
OUTPUT PERFORMANCE
Voltage Swing
AD8145W
only, T
MIN
to T
MAX
Output Current
Short-Circuit Current
Short to GND, source/sink
Rev. B | Page 3 of 21
AD8145
Parameter
COMPARATOR PERFORMANCE
V
OH
V
OL
Input Offset Voltage
Hysteresis Width
Input Bias Current
Propagation Delay, t
PLH
Propagation Delay, t
PHL
Rise Time
Fall Time
POWER-DOWN PERFORMANCE
Power-Down V
IH
Power-Down V
IL
Power-Down I
IH
Power-Down I
IL
Power-Down Assert Time
POWER SUPPLY
Operating Range
Quiescent Current, Positive Supply
Conditions
R
L
= 1 kΩ
AD8145W
only, T
MIN
to T
MAX
R
L
= 1 kΩ
AD8145W
only, T
MIN
to T
MAX
Min
3.205
2.950
Typ
3.310
0.390
±2.5
18
1.5
6
6
6
2
V
S+
− 1.65
V
S+
− 2.65
0.5
−250
1
4.5
48.5
AD8145W
only, T
MIN
to T
MAX
Disabled
AD8145W
only, T
MIN
to T
MAX
Quiescent Current, Negative Supply
AD8145W
only, T
MIN
to T
MAX
Disabled
AD8145W
only, T
MIN
to T
MAX
DC
AD8145W
only, T
MIN
to T
MAX
DC
AD8145W
only, T
MIN
to T
MAX
−52
−65
−13.9
−20
16
−43.5
−11
−79
−68
−70
−66
−57
−54
Data Sheet
Max
Unit
V
V
V
V
mV
mV
µA
ns
ns
ns
ns
V
V
µA
µA
µs
11
57.5
70
19.5
25
V
mA
mA
mA
mA
mA
mA
mA
mA
dB
dB
dB
dB
0.420
0.440
10% to 90%
10% to 90%
PSRR, Positive Supply
PSRR, Negative Supply
Rev. B | Page 4 of 21
京公网安备 11010802033920号
EEWORLD
