1994 Burr-Brown Corporation
PDS-1267B
Printed in U.S.A. July, 1995
FEATURES
q
LOW POWER: 50mW/channel
q
UNITY GAIN STABLE BANDWIDTH:
360MHz
q
FAST SETTLING TIME: 20ns to 0.01%
q
LOW INPUT BIAS CURRENT: 5
A
q
DIFFERENTIAL GAIN/PHASE ERROR:
0.01%/0.025
q
14-PIN DIP and SO-14 SURFACE MOUNT
PACKAGES AVAILABLE
DESCRIPTION
The OPA4650 is a quad, low power, wideband voltage
feedback operational amplifier. It features a high band-
width of 360MHz as well as a 12-bit settling time of
only 20ns. The low input bias current allows its use in
high speed integrator applications, while the wide
bandwidth and true differential input stage make it
suitable for use in a variety of active filter applica-
tions. Its low distortion gives exceptional performance
for telecommunications, medical imaging and video
applications.
The OPA4650 is internally compensated for unity-
gain stability. This amplifier has a fully symmetrical
differential input due to its "classical" operational
amplifier circuit architecture. Its unusual combination
of speed, accuracy and low power make it an outstand-
ing choice for many portable, multi-channel and other
high speed applications, where power is at a premium.
The OPA4650 is also available in single (OPA650)
and dual (OPA2650) configurations.
Wideband, Low Power, Quad Voltage Feedback
OPERATIONAL AMPLIFIER
OPA4650
Current
Mirror
Output
Stage
C
C
Inverting
Input
Non-Inverting
Input
+V
S
Output
V
S
Simplified Schematic
1 of 4 Channels
APPLICATIONS
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HIGH RESOLUTION VIDEO
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MONITOR PREAMPLIFIER
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CCD IMAGING AMPLIFIER
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ULTRASOUND SIGNAL PROCESSING
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ADC/DAC BUFFER AMPLIFIER
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ACTIVE FILTERS
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HIGH SPEED INTEGRATORS
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DIFFERENTIAL AMPLIFIER
International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111 Twx: 910-952-1111
Internet: http://www.burr-brown.com/ FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
OPA4650
OPA4650
DEMO BOARD
AVAILABLE
2
OPA4650
SPECIFICATIONS
At T
A
= +25
C, V
S
=
5V, R
L
= 100
, and R
FB
= 402
,
unless otherwise noted. R
FB
= 25
for a gain of +1.
OPA4650P, U
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
FREQUENCY RESPONSE
Closed-Loop Bandwidth
(1)
G = +1
360
MHz
G = +2
120
MHz
G = +5
35
MHz
G = +10
16
MHz
Gain Bandwidth Product
160
MHz
Slew Rate
(2)
G = +1, 2V Step
240
V/
s
Over Specified Temperature
220
V/
s
Rise Time
0.2V Step
1
ns
Fall Time
0.2V Step
1
ns
Settling Time
0.01%
G = +1, 2V Step
20
ns
0.1%
G = +1, 2V Step
10.3
ns
1%
G = +1, 2V Step
7.9
ns
Spurious Free Dynamic Range
G = +1, f = 5.0 MHz, V
O
= 2Vp-p
R
L
= 100
68
dBc
R
L
= 402
74
dBc
Differential Gain
G = +2, NTSC, V
O
= 1.4Vp, R
L
= 150
0.01
%
Differential Phase
G = +2, NTSC, V
O
= 1.4Vp, R
L
= 150
0.025
Degrees
Bandwidth for 0.1dB Flatness
G = +2
21
MHz
Crosstalk
Input Referred, 5MHz, all hostile
63
dB
Input Referred, 5MHz, Channel-to-Channel
66
dB
OFFSET VOLTAGE
Input Offset Voltage
1
5.5
mV
Average Drift
3
V/
C
Power Supply Rejection (+V
S
)
|V
S
| = 4.5V to 5.5V
60
76
dB
(V
S
)
47
52
dB
INPUT BIAS CURRENT
Input Bias Current
V
CM
= 0V
5
20
A
Over Temperature
30
A
Input Offset Current
V
CM
= 0V
0.5
1.0
A
Over Temperature
3.0
A
INPUT NOISE
Input Voltage Noise
Noise Density, f = 100Hz
43
nV/
Hz
f = 10kHz
9.4
nV/
Hz
f = 1MHz
8.4
nV/
Hz
f = 1MHz to 100MHz
8.4
nV/
Hz
Integrated Noise, BW = 10Hz to 100MHz
84
Vp-p
Input Bias Current Noise
Current Noise Density, f = 0.1MHz to 100MHz
1.2
pA/
Hz
Noise Figure (NF)
R
S
= 10k
4.0
dBm
R
S
= 50
19.5
dBm
INPUT VOLTAGE RANGE
Common-Mode Input Range
2.8
V
Over Specified Temperature
2.2
V
Common-Mode Rejection
V
CM
=
0.5V
65
90
dB
INPUT IMPEDANCE
Differential
15 || 1
k
|| pF
Common-Mode
16 || 1
M
|| pF
OPEN-LOOP GAIN
Open-Loop Voltage Gain
V
O
=
2V, R
L
= 100
45
51
dB
Over Specified Temperature
V
O
=
2V, R
L
= 100
43
dB
OUTPUT
Voltage Output
Over Specified Temperature
No Load
2.2
3.0
V
R
L
= 250
2.2
2.5
V
R
L
= 100
2.0
2.3
V
Output Current, Sourcing
75
110
mA
Over Temperature Range
65
mA
Output Current, Sinking
65
85
mA
Over Temperature Range
35
mA
Short-Circuit Current
150
mA
Output Resistance
0.1MHz, G = +1
0.08
POWER SUPPLY
Specified Operating Voltage
5
V
Operating Voltage Range
4.5
5.5
V
Quiescent Current
All Channels
23
32
mA
Over Specified Temperature
35
mA
TEMPERATURE RANGE
Specification: P, U
40
+85
C
Thermal Resistance,
JA
P
75
C/W
U
75
C/W
NOTES: (1) Frequency response can be strongly influenced by PC board parasites. The OPA4650 is nominally compensated assuming 2pF parasitic load. The
demonstration board, DEM-OPA465xP, shows a low parasitic layout for this part. (2) Slew rate is rate of change from 10% to 90% of output voltage step.
3
OPA4650
ORDERING INFORMATION
PRODUCT
PACKAGE
TEMPERATURE RANGE
OPA4650U
SO-14 Surface Mount
40
C to +85
C
OPA4650P
14-Pin Plastic DIP
40
C to +85
C
PACKAGE INFORMATION
PACKAGE DRAWING
PRODUCT
PACKAGE
NUMBER
(1)
OPA4650U
SO-14 Surface Mount
235
OPA4650P
14-Pin Plastic DIP
010
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
Total Supply Voltage Across Device ................................................... 11V
Internal Power Dissipation ........................... See Thermal Considerations
Differential Input Voltage ..................................................................
2.7V
Common-Mode Input Voltage Range ..................................................
V
S
Storage Temperature Range: P, U, .............................. 40
C to +125
C
Lead Temperature (soldering, 10s) .............................................. +300
C
(soldering, SOIC 3s) ....................................... +260
C
Junction Temperature (T
J
) ............................................................ +175
C
ABSOLUTE MAXIMUM RATINGS
ELECTROSTATIC
DISCHARGE SENSITIVITY
Electrostatic discharge can cause damage ranging from per-
formance degradation to complete device failure. Burr-Brown
Corporation recommends that all integrated circuits be handled
and stored using appropriate ESD protection methods.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet published speci-
fications.
Top View
DIP/SO-14
PIN CONFIGURATION
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Output 4
Input 4
+Input 4
V
S
+Input 3
Input 3
Output 3
Output 1
Input 1
+Input 1
+V
S
+Input 2
Input 2
Output 2
4
OPA4650
TYPICAL PERFORMANCE CURVES
At T
A
= +25
C, V
S
=
5V, R
L
= 100
, and R
FB
= 402
,
unless otherwise noted. R
FB
= 25
for a gain of +1.
A
OL
, PSR AND CMRR vs TEMPERATURE
110
100
90
80
70
60
50
50
25
0
25
50
75
125
A
OL
, PSR and CMRR (dB)
Temperature (C)
A
OL
PSR
CMRR
PSR+
COMMON-MODE REJECTION
vs INPUT COMMON-MODE VOLTAGE
100
90
80
70
60
4
3
2
1
0
1
2
3
4
Common-Mode Rejection (dB)
Common-Mode Voltage (V)
INPUT BIAS CURRENT AND OFFSET VOLTAGE
vs TEMPERATURE
7
6
5
4
2
1
0
1
50
25
0
25
50
75
100
Input Bias Current (mA)
Offset Voltage (mV)
Temperature (C)
V
OS
I
B
SUPPLY CURRENT vs TEMPERATURE
26
24
22
20
50
25
0
25
50
75
100
Supply Current (mA)
Temperature (C)
I
Q
INPUT VOLTAGE AND CURRENT NOISE
vs FREQUENCY
Frequency (Hz)
100
1k
10k
100k
1M
100
10
1
Input Current Noise (pA/
Hz)
Input Voltage Noise (nV/
Hz)
Non-inverting and
Inverting Current Noise
Voltage Noise
OUTPUT CURRENT vs TEMPERATURE
70
65
60
55
50
25
0
25
50
75
100
Output Current (mA)
Temperature (C)
I
O
+
I
O
5
OPA4650
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, V
S
=
5V, R
L
= 100
, and R
FB
= 402
,
unless otherwise noted. R
FB
= 25
for a gain of +1.
SMALL SIGNAL TRANSIENT RESPONSE
(G = +1)
Time (5ns/div)
200
160
120
80
40
0
40
80
120
160
200
Output Voltage (mV)
RECOMMENDED ISOLATION RESISTANCE
vs CAPACITIVE LOAD
40
30
20
10
0
0
20
40
60
80
100
Isolation Resistance, R
ISO
(
)
Capacitive Load, C
L
(pF)
OPA4650
C
L
1k
R
ISO
25
LARGE SIGNAL TRANSIENT RESPONSE
(G = +1)
Time (5ns/div)
2.0
1.6
1.2
0.8
0.4
0
0.4
0.8
1.2
1.6
2.0
Output Voltage (V)
CLOSED-LOOP BANDWIDTH (G = +1)
Frequency (Hz)
6
3
0
3
6
9
12
1M
10M
100M
1G
SO-14/DIP Bandwidth = 360MHz
Gain (dB)
CLOSED-LOOP BANDWIDTH (G = +2)
Frequency (Hz)
12
9
6
3
0
3
6
9
1M
10M
100M
1G
Gain (dB)
SO-14/DIP Bandwidth = 120MHz
CLOSED-LOOP BANDWIDTH (G = +5)
Frequency (Hz)
21
17
14
11
8
5
2
1
1M
10M
100M
1G
Gain (dB)
SO-14/DIP Bandwidth = 35MHz
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