bandwidth of 650MHz as well as a 12-bit settling time
of only 15ns. Its low input bias current and wide
bandwidth allows it to be used for high speed integra-
tor and active filter designs. Its low distortion gives
exceptional performance for telecommunications,
medical imaging and video applications.
The OPA646 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 ideal
choice for many portable, multichannel and other high
speed applications where power is at a premium.
APPLICATIONS
q
TELECOMMUNICATIONS
q
MEDICAL IMAGING
q
CCD IMAGING
q
PORTABLE EQUIPMENT
q
ACTIVE FILTERS
q
VIDEO AMPLIFICATION
q
ADC/DAC GAIN AMPLIFIER
q
HIGH SPEED INTEGRATORS
+V
S
7, 8
Non-Inverting
Input
Inverting
Input
3
Output
Stage
Current
Mirror
C
C
6
V
OUT
2
4, 5
–V
S
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
NOTE: (1) Making use of all four power supply pins is highly recommended,
although not required. Using these four pins, instead of just pins 4 and 7, will
lower the effective pin impedance and substantially lower distortion.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
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 its published
specifications.
PACKAGE /ORDERING INFORMATION
PRODUCT
OPA646U, UB
PACKAGE
SO-8 Surface Mount
PACKAGE DRAWING
NUMBER
(1)
182
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book. (2) The “B” grade of the
SO-8 will be marked with a “B” by pin 8.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
3
OPA646
TYPICAL PERFORMANCE CURVES
At T
A
= +25°C, V
S
=
±5V,
R
L
= 100Ω, C
L
= 2pF, R
FB
= 402Ω and all four power supply pins are used, unless otherwise noted. R
FB
= 25Ω for a gain of +1.
90
A
OL
, PSR, AND CMR vs TEMPERATURE
Common-Mode Rejection (dB)
COMMON-MODE REJECTION
vs INPUT COMMON-MODE VOLTAGE
110
CMR
A
OL
, PSR, CMR (dB)
80
PSR+
70
100
90
60
A
OL
50
–75
PSR–
–50
–25
0
+25
+50
+75
+100
+125
80
70
–5
–4
–3
–2
–1
0
+1
+2
+3
+4
+5
Common-Mode Voltage (V)
Temperature (°C)
INPUT BIAS CURRENT vs TEMPERATURE
4
8
SUPPLY CURRENT vs TEMPERATURE
Input Bias Current (µA)
2
Supply Current (±mA)
7
6
5
0
–75
–50
–25
0
+25
+50
+75
+100
+125
4
–75
–50
–25
0
+25
+50
+75
+100
+125
Ambient Temperature (°C)
Ambient Temperature (°C)
OUTPUT CURRENT vs TEMPERATURE
70
100
VOLTAGE NOISE vs FREQUENCY
60
I
O
+
I
O
–
Voltage Noise (nV/√Hz)
80
Output Current (±mA)
60
40
50
20
40
–60
0
–40
–20
0
20
40
60
80
100 120 140
10
100
1k
10k
100k
1M
10M
Ambient Temperature (°C)
Frequency (Hz)
®
OPA646
4
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25°C, V
S
=
±5V,
R
L
= 100Ω, C
L
= 2pF, R
FB
= 402Ω and all four power supply pins are used, unless otherwise noted. R
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