back operational amplifier featuring exceptionally high
open loop transimpedance and high slew rate. The
current feedback architecture allows for excellent
large signal bandwidth, even at high gains. The high
transimpedance allows this op amp to be used in
applications requiring 16 bits or more of accuracy.
This extra transimpedance at high bandwidths gives
very low distortion and low differential gain and
phase errors. The high slew rate and well-behaved
pulse response allow for superior large signal ampli-
fication in a variety of RF, video and other signal
processing applications. Fabricated on an advanced
complementary bipolar process, the OPA644 offers
exceptional performance in monolithic form.
+V
S
7, 8
APPLICATIONS
q
HIGH-SPEED SIGNAL PROCESSING
q
HIGH-RESOLUTION VIDEO
q
PULSE AMPLIFICATION
q
COMMUNICATIONS
q
ADC/DAC GAIN AMPLIFIER
q
RF AMPLIFICATION
q
MEDICAL IMAGING
q
AUDIO AMPLIFICATION
3
In+
Gain Stage
I
BIAS
Comp
2
In–
Buffer
6
V
OUT
Comp
I
BIAS
Gain Stage
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
= 402Ω and all four power supply pins are used, unless otherwise noted.
OPA644U
PARAMETER
OFFSET VOLTAGE
Input Offset Voltage
Average Drift
Power Supply Rejection
INPUT BIAS CURRENT
(1)
Non-Inverting
Over Specified Temperature
Inverting
Over Specified Temperature
NOISE
Input Voltage Noise Density
f = 100Hz
f = 1kHz
f = 10kHz
f = 1MHz
f
B
= 100Hz to 200MHz
Inverting Input Bias Current
Noise Density: f = 10MHz
Non-Inverting Input Current
Noise Density: f = 10MHz
INPUT VOLTAGE RANGE
Common-Mode Input Range
Over Specified Temperature
Common-Mode Rejection
INPUT IMPEDANCE
Non-Inverting
Inverting
Open-Loop Transimpedance
FREQUENCY RESPONSE
Closed-Loop Bandwidth
±2.0
±1.8
35
CONDITIONS
MIN
TYP
±2.5
20
65
±20
±24
±2
±4
MAX
±6
60
±40
±90
±25
±35
MIN
OPA644UB
TYP
±2
10
75
±15
±20
T
±3
MAX
±3
UNITS
mV
µV/°C
dB
µA
µA
µA
µA
V
S
=
±4.5
to
±5.5V
40
±20
±50
±10
±25
10.3
2.9
1.9
1.9
33.6
15
15
±2.25
±2.1
55
500 || 1.0
20
2.0
500
300
180
125
80
2500
21
16.5
5.5
60
84
T
T
45
T
T
T
T
T
T
T
T
T
65
T
46
T
T
T
T
T
T
T
T
T
T
T
86
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
µVrms
pA/√Hz
pA/√Hz
V
V
dB
kΩ || pF
Ω
MΩ
MHz
MHz
MHz
MHz
MHz
V/µs
ns
ns
ns
ns
dBc
dBc
%
Degrees
MHz
mA
mA
V
V
mA
Ω
V
V
mA
°C
°C/W
V
CM
=
±2V
V
O
=
±2V,
R
L
= 1kΩ
G = +1V/V
G = +2V/V
G = +5V/V
G = +10V/V
G = +20V/V
G = +2, 2V Step
G = +2, 2V Step
G = +2, 2V Step
G = +2, 2V Step
G = –1, f = 5.0MHz
V
O
= 2Vp-p
G = –1, f = 20MHz
G = +2V/V, V
O
= 0V to 1.4V
R
L
= 150Ω
G = +2V/V, V
O
= 0V to 1.4V
R
L
= 150Ω
G = +1
1.4
T
Slew Rate
(1)
Settling Time: 0.01%
0.1%
1%
Overload Recovery Time
(2)
Spurious Free Dynamic Range
Differential Gain Error at 3.58MHz
Differential Phase Error at 3.58MHz
Gain Flatness to 1dB
OUTPUT
Current Output
Over Specified Temperature
Voltage Output
Over Specified Temperature
Voltage Output
Over Specified Temperature
Short Circuit Current
Output Resistance
POWER SUPPLY
Specified Operating Voltage
Operating Voltage Range
Quiescent Current
TEMPERATURE RANGE
Specification: U
Thermal Resistance,
θ
JA
U, UB
8-Pin SO-8
T
Specification same as OPA644U.
0.008
0.009
250
±40
±30
±60
±45
±3.5
±3.25
75
0.2
±5
±18
±50
±40
T
T
T
T
T
±66
±50
T
T
T
T
T
±5.5
±26
+85
T
T
T
T
T
T
T
No Load
±3.0
R
L
= 100Ω
±2.75
1MHz, G = +2V/V
T
MIN
to T
MAX
T
MIN
to T
MAX
T
MIN
to T
MAX
±4.5
–40
125
NOTES: (1) Slew rate is rate of change from 10% to 90% of the output voltage step. (2) Time for the output to resume linear operation after saturation.
®
OPA644
2
PIN CONFIGURATION (All Packages)
Top View
SO-8
ABSOLUTE MAXIMUM RATINGS
Power Supply ..............................................................................
±5.5VDC
Internal Power Dissipation .......................... See Thermal Considerations
Differential Input Voltage ..................................................................
±1.2V
Input Voltage Range ............................................................................
±V
S
Storage Temperature Range: U, UB ............................ –40°C to +125°C
Lead Temperature (soldering, 10s) .............................................. +300°C
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
OPA644U, 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 package 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
OPA644
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.
PSR AND CMR vs TEMPERATURE
80
PSR+
70
PSR, CMR (dB)
OUTPUT CURRENT vs TEMPERATURE
80
PSR–
CMR
Output Current (±mA)
I
O
+
70
I
O
–
60
60
50
40
–75
50
–50
–25
0
25
50
75
100
125
–60 –40 –20
0
20
40
60
80
100 120 140
Temperature (°C)
Ambient Temperature (°C)
SUPPLY CURRENT vs TEMPERATURE
20
Harmonic Distortion (dBc)
HARMONIC DISTORTION vs FREQUENCY
(G = +2, V
O
= 2Vp-p, R
L
= 100Ω)
–40
Supply Current (±mA)
19
–60
18
–80
2f
O
3f
O
1M
Frequency (Hz)
10M
100M
17
16
–75
–50
–25
0
25
50
75
100
125
Ambient Temperature (°C)
–100
100k
HARMONIC DISTORTION vs FREQUENCY
(G = –1, V
O
= 2Vp-p, R
L
= 100Ω)
–40
–40
HARMONIC DISTORTION vs FREQUENCY
(G = +5, V
O
= 2Vp-p, R
L
= 100Ω)
Harmonic Distortion (dBc)
–60
3f
O
2f
O
–80
Harmonic Distortion (dBc)
–60
–80
2f
O
3f
O
–100
100k
1M
Frequency (Hz)
10M
100M
–100
100k
1M
Frequency (Hz)
10M
100M
®
OPA644
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
