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REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AD8132
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 2000
Low-Cost, High-Speed
Differential Amplifier
FUNCTIONAL BLOCK DIAGRAM
AD8132
+
1
2
3
4
NC = NO CONNECT
IN
+IN
V
OCM
NC
V+
V
+OUT
OUT
8
7
6
5
FEATURES
High Speed
350 MHz 3 dB Bandwidth
1200 V/ s Slew rate
Resistor-Settable Gain
Internal Common-Mode Feedback to Improve Gain
and Phase Balance 68 dB @ 10 MHz
Separate Input to Set the Common-Mode Output
Voltage
Low Distortion 99 dBc SFDR @ 5 MHz 800 Load
Low Power 10.7 mA @ 5 V
Power Supply Range +2.7 V to 5.5 V
APPLICATIONS
Low Power Differential ADC Driver
Differential Gain and Differential Filtering
Video Line Driver
Differential In/Out Level-Shifting
Single-Ended Input to Differential Output Driver
Active Transformer
GENERAL DESCRIPTION
The AD8132 is a low-cost differential or single-ended input to
differential output amplifier with resistor-settable gain. The
AD8132 is a major advancement over op amps for driving differ-
ential input ADCs or for driving signals over long lines. The
AD8132 has a unique internal feedback feature that provides
output gain and phase matching balanced to 68 dB at 10 MHz,
suppressing harmonics, and reducing radiated EMI.
Manufactured on ADI's next generation of XFCB bipolar pro-
cess, the AD8132 has a 3 dB bandwidth of 350 MHz and
delivers a differential signal with 99 dBc SFDR at 5 MHz,
despite its low cost. The AD8132 eliminates the need for a
transformer with high-performance ADCs, preserving the low
frequency and dc information. The common-mode level of the
differential output is adjustable by applying a voltage on the V
OCM
pin, easily level-shifting the input signals for driving single supply
ADCs. Fast overload recovery preserves sampling accuracy.
The AD8132 can also be used as a differential driver for the
transmission of high-speed signals over low-cost twisted pair or
coaxial cables. The feedback network can be adjusted to boost
the high-frequency components of the signal. The AD8132 can
be used for either analog or digital video signals or for other high-
speed data transmission. The AD8132 is capable of driving either
cat3 or cat5 twisted pair or coaxial with minimal line attenu-
ation. The AD8132 has considerable cost and performance
improvements over discrete line driver solutions.
Differential signal processing reduces the effects of ground noise
which plagues ground referenced systems. The AD8132 can be
used for differential signal processing (gain and filtering) through-
out a signal chain, easily simplifying the conversion between
differential and single-ended components.
The AD8132 is available in both SOIC and
SOIC packages for
operation over 40
C to +85C temperatures.
FREQUENCY MHz
6
1
GAIN
dB
3
0
3
6
9
12
10
100
1k
V
S
= 5V
G = 1
V
O,dm
= 2V p-p
R
L,dm
= 499
Figure 1. Large Signal Frequency Response
REV. 0
2
AD8132SPECIFICATIONS
P
arameter
Conditions
Min
Typ
Max
Unit
D
IN
to OUT Specifications
DYNAMIC PERFORMANCE
3 dB Large Signal Bandwidth
V
OUT
= 2 V p-p
300
350
MHz
V
OUT
= 2 V p-p, G = 2
190
MHz
3 dB Small Signal Bandwidth
V
OUT
= 0.2 V p-p
360
MHz
V
OUT
= 0.2 V p-p, G = 2
160
MHz
Bandwidth for 0.1 dB Flatness
V
OUT
= 0.2 V p-p
90
MHz
V
OUT
= 0.2 V p-p, G = 2
50
MHz
Slew Rate
V
OUT
= 2 V p-p
1000
1200
V/
s
Settling Time
0.1%, V
OUT
= 2 V p-p
15
ns
Overdrive Recovery Time
V
IN
= 5 V to 0 V Step, G = 2
5
ns
NOISE/HARMONIC PERFORMANCE
Second Harmonic
V
OUT
= 2 V p-p, 1 MHz, R
L,dm
= 800
96
dBc
V
OUT
= 2 V p-p, 5 MHz, R
L,dm
= 800
83
dBc
V
OUT
= 2 V p-p, 20 MHz, R
L,dm
= 800
73
dBc
Third Harmonic
V
OUT
= 2 V p-p, 1 MHz, R
L,dm
= 800
102
dBc
V
OUT
= 2 V p-p, 5 MHz, R
L,dm
= 800
98
dBc
V
OUT
= 2 V p-p, 20 MHz, R
L,dm
= 800
67
dBc
IMD
20 MHz, R
L,dm
= 800
76
dBc
IP3
20 MHz, R
L,dm
= 800
40
dBm
Input Voltage Noise (RTI)
f = 0.1 MHz to 100 MHz
8
nV/
Hz
Input Current Noise
f = 0.1 MHz to 100 MHz
1.8
pA/
Hz
Differential Gain Error
NTSC, G = 2, R
L,dm
= 150
0.01
%
Differential Phase Error
NTSC, G = 2, R
L,dm
= 150
0.10
Degrees
INPUT CHARACTERISTICS
Offset Voltage (RTI)
V
OS,dm
= V
OUT,dm
/2; V
DIN+
= V
DIN
= V
OCM
= 0 V
1.0
3.5
mV
T
MIN
to T
MAX
Variation
10
V/C
Input Bias Current
3
7
A
Input Resistance
Differential
12
M
Common-Mode
3.5
M
Input Capacitance
1
pF
Input Common-Mode Voltage
7 to +6
V
CMRR
V
OUT,dm
/
V
IN,cm
;
V
IN,cm
=
1 V;
70
60
dB
Resistors Matched to 0.01%
OUTPUT CHARACTERISTICS
Output Voltage Swing
Maximum
V
OUT
; Single-Ended Output
3.6 to +3.6
V
Output Current
70
mA
Output Balance Error
V
OUT,cm
/
V
OUT,dm
;
V
OUT,dm
= 1 V
70
dB
V
OCM
to OUT Specifications
DYNAMIC PERFORMANCE
3 dB Bandwidth
V
OCM
= 600 mV p-p
210
MHz
Slew Rate
V
OCM
= 1 V to +1 V
400
V/
s
DC PERFORMANCE
Input Voltage Range
3.6
V
Input Resistance
150
k
Input Offset Voltage
V
OS,cm
= V
OUT,cm
; V
DIN+
= V
DIN
= V
OCM
= 0 V
1.5
7
mV
Input Bias Current
0.5
A
V
OCM
CMRR
[V
OUT,dm
/
V
OCM
];
V
OCM
=
1 V;
68
dB
Resistors Matched to 0.01%
Gain
V
OUT,cm
/
V
OCM
;
V
OCM
=
1 V
0.985
1
1.015
V/V
POWER SUPPLY
Operating Range
1.35
5.5
V
Quiescent Current
V
DIN+
= V
DIN
= V
OCM
= 0 V
11
12
13
mA
T
MIN
to T
MAX
Variation
16
A/C
Power Supply Rejection Ratio
V
OUT,dm
/
V
S
;
V
S
=
1 V
70
60
dB
OPERATING TEMPERATURE RANGE
40
+85
C
Specifications subject to change without notice.
(@ 25 C, V
S
= 5 V, V
OCM
= 0 V, G = 1, R
L,dm
= 499 , R
F
= R
G
= 348 unless
otherwise noted. For G = 2, R
L,dm
= 200
, R
F
= 1000
, R
G
= 499
. Refer to TPC 1 and TPC 10 for test setup and label descriptions. All
specifications refer to single-ended input and differential outputs unless otherwise noted.)
REV. 0
3
AD8132
P
arameter
Conditions
Min
Typ
Max
Unit
D
IN
to OUT Specifications
DYNAMIC PERFORMANCE
3 dB Large Signal Bandwidth
V
OUT
= 2 V p-p
250
300
MHz
V
OUT
= 2 V p-p, G = 2
180
MHz
3 dB Small Signal Bandwidth
V
OUT
= 0.2 V p-p
360
MHz
V
OUT
= 0.2 V p-p, G = 2
155
MHz
Bandwidth for 0.1 dB Flatness
V
OUT
= 0.2 V p-p
65
MHz
V
OUT
= 0.2 V p-p, G = 2
50
MHz
Slew Rate
V
OUT
= 2 V p-p
800
1000
V/
s
Settling Time
0.1%, V
OUT
= 2 V p-p
20
ns
Overdrive Recovery Time
V
IN
= 2.5 V to 0 V Step, G = 2
5
ns
NOISE/HARMONIC PERFORMANCE
Second Harmonic
V
OUT
= 2 V p-p, 1 MHz, R
L,dm
= 800
97
dBc
V
OUT
= 2 V p-p, 5 MHz, R
L,dm
= 800
100
dBc
V
OUT
= 2 V p-p, 20 MHz, R
L,dm
= 800
74
dBc
Third Harmonic
V
OUT
= 2 V p-p, 1 MHz, R
L,dm
= 800
100
dBc
V
OUT
= 2 V p-p, 5 MHz, R
L,dm
= 800
99
dBc
V
OUT
= 2 V p-p, 20 MHz, R
L,dm
= 800
67
dBc
IMD
20 MHz, R
L,dm
= 800
76
dBc
IP3
20 MHz, R
L,dm
= 800
40
dBm
Input Voltage Noise (RTI)
f = 0.1 MHz to 100 MHz
8
nV/
Hz
Input Current Noise
f = 0.1 MHz to 100 MHz
1.8
pA/
Hz
Differential Gain Error
NTSC, G = 2, R
L,dm
= 150
0.025
%
Differential Phase Error
NTSC, G = 2, R
L,dm
= 150
0.15
Degree
INPUT CHARACTERISTICS
Offset Voltage (RTI)
V
OS,dm
= V
OUT,dm
/2; V
DIN+
= V
DIN
= V
OCM
= 2.5 V
1.0
3.5
mV
T
MIN
to T
MAX
Variation
6
V/C
Input Bias Current
3
7
A
Input Resistance
Differential
10
M
Common-Mode
3
M
Input Capacitance
1
pF
Input Common-Mode Voltage
1 to +4
V
CMRR
V
OUT,dm
/
V
IN,cm
;
V
IN,cm
=
1 V;
70
60
dB
Resistors Matched to 0.01%
OUTPUT CHARACTERISTICS
Output Voltage Swing
Maximum
V
OUT
; Single-Ended Output
1 to 3.7
V
Output Current
50
mA
Output Balance Error
V
OUT,cm
/
V
OUT,dm
;
V
OUT,dm
= 1 V
68
dB
V
OCM
to OUT Specifications
DYNAMIC PERFORMANCE
3 dB Bandwidth
V
OCM
= 600 mV p-p
210
MHz
Slew Rate
V
OCM
= 1.5 V to 3.5 V
340
V/
s
DC PERFORMANCE
Input Voltage Range
1 to 3.7
V
Input Resistance
130
k
Input Offset Voltage
V
OS,cm
= V
OUT,cm
; V
DIN+
= V
DIN
= V
OCM
= 2.5 V
5
11
mV
Input Bias Current
0.5
A
V
OCM
CMRR
[V
OUT,dm
/
V
OCM
];
V
OCM
= 2.5
1 V;
66
dB
Resistors Matched to 0.01%
Gain
V
OUT,cm
/
V
OCM
;
V
OCM
= 2.5
1 V
0.985
1
1.015
V/V
POWER SUPPLY
Operating Range
2.7
11
V
Quiescent Current
V
DIN+
= V
DIN
= V
OCM
= 2.5 V
9.4
10.7
12
mA
T
MIN
to T
MAX
Variation
10
A/C
Power Supply Rejection Ratio
V
OUT,dm
/
V
S
;
V
S
=
1 V
70
60
dB
OPERATING TEMPERATURE RANGE
40
+85
C
Specifications subject to change without notice.
(@ 25 C, V
S
= 5 V, V
OCM
= 2.5 V, G = 1, R
L,dm
= 499
, R
F
= R
G
= 348 unless
otherwise noted. For G = 2, R
L,dm
= 200
, R
F
= 1000
, R
G
= 499 . Refer to TPC 1 and TPC 10 for test setup and label descriptions. All
specifications refer to single-ended input and differential outputs unless otherwise noted.)
AD8132SPECIFICATIONS
REV. 0
4
AD8132SPECIFICATIONS
P
arameter
Conditions
Min
Typ
Max
Unit
D
IN
to OUT Specifications
DYNAMIC PERFORMANCE
3 dB Large Signal Bandwidth
V
OUT
= 1 V p-p
350
MHz
V
OUT
= 1 V p-p, G = 2
165
MHz
3 dB Small Signal Bandwidth
V
OUT
= 0.2 V p-p
350
MHz
V
OUT
= 0.2 V p-p, G = 2
150
MHz
Bandwidth for 0.1 dB Flatness
V
OUT
= 0.2 V p-p
45
MHz
V
OUT
= 0.2 V p-p, G = 2
50
MHz
NOISE/HARMONIC PERFORMANCE
Second Harmonic
V
OUT
= 1 V p-p, 1 MHz, R
L,dm
= 800
100
dBc
V
OUT
= 1 V p-p, 5 MHz, R
L,dm
= 800
94
dBc
V
OUT
= 1 V p-p, 20 MHz, R
L,dm
= 800
77
dBc
Third Harmonic
V
OUT
= 1 V p-p, 1 MHz, R
L,dm
= 800
90
dBc
V
OUT
= 1 V p-p, 5 MHz, R
L,dm
= 800
85
dBc
V
OUT
= 1 V p-p, 20 MHz, R
L,dm
= 800
66
dBc
INPUT CHARACTERISTICS
Offset Voltage (RTI)
V
OS,dm
= V
OUT,dm
/2; V
DIN+
= V
DIN
= V
OCM
= 1.5 V
10
mV
Input Bias Current
3
A
CMRR
V
OUT,dm
/
V
IN,cm
;
V
IN,cm
=
0.5 V;
60
dB
Resistors Matched to 0.01%
V
OCM
to OUT Specifications
DC PERFORMANCE
Input Offset Voltage
V
OS,cm
= V
OUT,cm
; V
DIN+
= V
DIN
= V
OCM
= 1.5 V
7
mV
Gain
V
OUT,cm
/
V
OCM
;
V
OCM
=
0.5 V
1
V/V
POWER SUPPLY
Operating Range
2.7
11
V
Quiescent Current
V
DIN+
= V
DIN
= V
OCM
= 0 V
7.25
mA
Power Supply Rejection Ratio
V
OUT,dm
/
V
S
;
V
S
=
0.5 V
70
dB
OPERATING TEMPERATURE RANGE
40
+85
C
Specifications subject to change without notice.
(@ 25 C, V
S
= 3 V, V
OCM
= 1.5 V, G = 1, R
L,dm
= 499
, R
F
= R
G
= 348
unless
otherwise noted. For G = 2, R
L,dm
= 200 , R
F
= 1000
, R
G
= 499
. Refer to TPC 1 and TPC 10 for test setup and label descriptions. All
specifications refer to single-ended input and differential outputs unless otherwise noted.)
REV. 0
5
AD8132
ABSOLUTE MAXIMUM RATINGS
1, 2
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5 V
V
OCM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V
S
Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . 250 mW
Operating Temperature Range . . . . . . . . . . . 40
C to +85C
Storage Temperature Range . . . . . . . . . . . . 65
C to +150C
Lead Temperature (Soldering 10 sec) . . . . . . . . . . . . . 300
C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above listed in the operational section of this
specification is not implied. Exposure to Absolute Maximum Ratings for any
extended periods may affect device reliability.
2
Thermal resistance measured on SEMI standard 4-layer board.
8-Lead SOIC:
JA
= 121
C/W
8-Lead
SOIC:
JA
= 142
C/W
AMBIENT TEMPERATURE C
50
0
T
J
= 150 C
2.0
1.5
1.0
MAXIMUM POWER DISSIPATION
Watts
8-LEAD SOIC
PACKAGE
40 30
0
10
20
30
40 50
60
70
80 90
8-LEAD
microSOIC
0.5
20 10
Figure 2. Plot of Maximum Power Dissipation vs.
Temperature
ORDERING GUIDE
Model
Temperature Range
Package Description
Package Option
AD8132AR
40
C to +85C
8-Lead SOIC
SO-8
AD8132AR-REEL
1
40
C to +85C
13" Tape and Reel
AD8132AR-REEL7
2
40
C to +85C
7" Tape and Reel
AD8132ARM
40
C to +85C
8-Lead
SOIC
SM-8
AD8132ARM-REEL
3
40
C to +85C
13" Tape and Reel
AD8132ARM-REEL7
2
40
C to +85C
7" Tape and Reel
AD8132-EVAL
Evaluation Board
NOTES
1
13" Reels of 2500 each.
2
7" Reels of 1000 each.
3
13" Reels of 3000 each.
PIN FUNCTION DESCRIPTIONS
Pin No.
Name
Function
1
IN
Negative Input.
2
V
OCM
Voltage applied to this pin sets the common-
mode output voltage with a ratio of 1:1. For
example, 1 V dc on V
OCM
will set the dc bias
level on +OUT and OUT to 1 V.
3
V+
Positive Supply Voltage.
4
+OUT
Positive Output. Note: the voltage at D
IN
is
inverted at +OUT.
5
OUT
Negative Output. Note: the voltage at +D
IN
is inverted at OUT.
6
V
Negative Supply Voltage.
7
NC
No Connect.
8
+IN
Positive Input.
PIN CONFIGURATION
AD8132
+
1
2
3
4
NC = NO CONNECT
IN
+IN
V
OCM
NC
V+
V
+OUT
OUT
8
7
6
5
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the AD8132 features proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
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