OP297AZ/883 ,DUAL LOW BIAS CURRENT PRECISION OPERATIONAL AMPLIFIERapplications including instrumenta-
tion amplifiers, log amplifiers, photo-diode preamplifiers and ..
OP297EZ ,Dual Low Bias Current Precision Operational AmplifierCHARACTERISTICS S A␣␣␣␣ OP297A/E ␣␣␣␣ OP297F ␣␣␣␣␣ OP297GParameter Symbol Conditions Min Typ Max Mi ..
OP297EZ ,Dual Low Bias Current Precision Operational AmplifierFEATURES PIN CONNECTIONSPrecision Performance in Standard SO-8 PinoutPlastic Epoxy-DIP (P Suffix)Lo ..
OP297FP ,Dual Low Bias Current Precision Operational AmplifierGENERAL DESCRIPTIONabove 85
OP297AZ/883
DUAL LOW BIAS CURRENT PRECISION OPERATIONAL AMPLIFIER
Dy ANALOG Dual Low Bias Current
DEVICES Precision Operational Amplifier
FEATURES Precision performance of the OP-297 includes very low offset,
. Precision Performance in Standard SO-8 Pinout under 50PM and “W drift, beiow 0.6wV/oC. Open-loop gain ex-
q Low Offset Voltage ............................................. SOILV Max ceeds 2000V/mV Insuring high linearity in every application.
. Low Offset Voltage Drift .............................. 0.6pV/°C Max Errors due to common-mode signals are eliminated by the
. Very Low Bias Current OP-297's common-mode rejection of over 1 20dB. The OP-297's
+25°C w.........-...................................................... 100pA Max power supply rejection of over 120dB minimizes offset voltage
-ti5oC to +1 25°C M.............................................. 450pA Max changes texperienced in battery powered systems. Supply current
. Very High Open-Loop Gain q...................... 2000V/mV Min of, the OP-297 is under 625PA per amplifier and it can operate
. Low Supply Current (Per Amplifier) ............... 625PA Max with supply voltages as low as "EN. Continued
o Operates From :t2V to t20V Supplies
. High Common-Mode Rejection ....................... 120dB Min
. Pin Compatible to LT1013, AD706, AD708, OP-221, PIN CONNECTIONS
LM158, and MC1458/1558 with Improved Performance PL A STI C MlNI-DIP
(P-Suffix)
APPLICATIONS 8-PIN CERDIP
. Strain Guage and Bridge Amplifiers (Z-Suffix)
. High Stability Thermocouple Amplifiers 8-PIN SO
q Instrumentation Ampllflers (S-Suffix)
o Photo-CurrentMonitors
o High-Gain Linearity Amplifiers
. Long-Termlntegrators/Filters
o Sample-and-Hold Amplifiers
. Peak Detectors L C C
o Logarithmic Amplifiers C f .
o Battery-Powered Systems (R -Su fix)
GENERAL DESCRIPTION
The OP-297 isthefirst dual op ampto pack precision performance
into the space-saving, industry standard 8-pin so package. Its
combination of precision with low power and extremely low input
bias current makes the dual OP-297 useful in a wide variety of
applications.
LOW BIAS CURRENT OVER TEMPERATURE VERY LOW OFFSET
60 's, I I 400 I I I I I I
t '3- vs = t15V 1200 t NITS TA: +25%
40 IL VCM = 0V - vs = 11511
N , VcM = 0V
R" la+ w 300 .
3- 20 C i
E N i. i,,
E 0 'Ns, 'N. g 200 . j
8 "ss, "s, E ".
5 -20 - los 'rc g y
% _ 'ss. - a
-40 \\
-75 -50 -25 o 25 50 75 100 125 -10o-80-60-40-20 o 20 40 60 80100
TEMPERATURE (°C) INPUT OFFSET VOLTAGE (w)
REV. B
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 One Technology Way, PO. Box 9106, Norwood, MA 02062-9106, US.A.
which may result from its use. No license is granted by implication or Tel: 617/329-4700 Fax: 617/326-8703 Twx: 710/394-6577
otherwise under any patent or patent rights of Analog Devices. Telex: 924491 Cable: ANALOG NORWOODMASS
0P-297
GENERAL DESCRIPTION Continued
The OP-297 utilizes a super-beta input stage with bias current
cancellation to maintain picoamp bias currents at all temperatures.
This is in contrast to FET input op amps whose bias currents start
in the picoamp range at 25°C, but double for every 10°C rise in
temperature, to reach the nanoamp range above 85°C. Input bias
current of the OP-297 is under100pA at 25°C and is under450pA
over the military temperature range.
Combining precision, low power and low bias current, the OP-
297 is ideal for a number of applications including instrumenta-
tion amplifiers, log amplifiers, photo-diode preampiifiers and long-
term integrators. For a single device, see the OP-97; for a quad,
see the OP-497.
ORDERING INFORMATION'
TA = +25°c PACKAGE OPERATING
vos MAX CERDIP PLASTIC LCC TEMPERATURE
(WV) 8-PIN 8-PIN ZO-CONTACT RANGE
so OP297AZ/883' - OP297ARC/883' MIL
so OP297AZ - - MIL
50 OP297EZ - - MIL
100 OP297FZ OP297FP - XIND
200 - OP297GP - XIND
200 - op2tmastt - XIND
For devices processed in total compliance to MIL-STD-883, add/883 after part
number. Consult factory for 883 data sheet.
Burn-in is available on extended industrial temperature range parts in CerDlP,
and plastic DIP packages. For ordering information, see PMI's Data Book,
Section 2.
tt For availability and burn-in information on SO packages, contact your local
sales office.
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage w................................................................ iZOV
Input Voltage (Note 2) ....................................................... iZOV
Differential Input Voltage (Note 2) ...................................... 40V
Output Short-Circuit Duration .................................... Indefinite
Storage Temperature Range
t Z, RC-Package ............................................ -65t to +175°C
P, S-Package ................................................. -ep'C to 150°C
Operating Temperature Range
OP-297A (Z, RC) ......................................... -55oC to +125°C
OP-297E, F (Z) .............................................. -400C to +85°C
OP-297F, G (P, S) ......................................... -40oC to +85°C
Junction Temperature
Z, RC-Package ........................................... -65°C to +175°C
P, S-Package .............................................. -650C to +150°C
Lead Temperature Range (Soldering, 60 sec) -....-.... 300°C
PACKAGE TYPE 6,. (Note 3) e“: UNITS
8-Pin CerDlP (Z) 134 12 ''C/W
B-Pin Plastic DIP (P) 96 37 ''C/W
20- Contact LCC (RC) 88 33 oc/W
8-Pin so (S) 150 41 °CNV
NOTES:
1. Absolute maximum ratings apply to both DICE and packaged parts, unless
otherwise noted.
2. For supply voltages less than WUN, the absolute maximum input voltage is
equal to the supply voltage.
3. 61A is specified for worst case mounting conditions, ie., 81A is specified for
device in socket for CerDiP, P-DIP. and LCC packages; 91A is specified for
device soldered to printed circuit board tor so package.
ELECTRICAL CHARACTERISTICS at Vs = i15V, TA = +25°C, unless otherwise noted.
OP-297A/E OP-297F OP-297G
PARAMETER SYMBOL CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
Input Offset
V - 25 50 - 50 100 - 80 200 V
Voltage os ll
Long-Term Input
- .1 - - .1 - - 0.1 - V/
Voltage Stability o 0 " mo
Input Offset
= - 00 - 5 150 - A
Current los VCM 0V 20 1 3 50 200 p
Input Bias
V ' 0V - A100 - 35 1150 - 50 1200 A
Current ks CM 20 p
Input Noise e o 1Hz to 10Hz - 0 5 - - o 5 - - o 5 - v
Voltage "W . . . . H W
Input Noise f0 = 10Hz - 20 - - 20 - - 20 -
Voltage Density en to =1000Hz - 17 - - 17 - - 17 - n 2
Input Noise .
f = 10H - 20 - - 20 - - 20 - fA/v/ Hz
Current Density in o Z
ly/ Resnslance Rm _ 30 - - 30 _ - 30 - Mn
Differential Mode
Input Resistance
- 500 - - 500 - - 500 - Gn
Common-Mode RING”
L Si I Vo = 110v
arge- 'tlla. Ave RL=2kQ 2000 4000 - 1500 3200 - 1200 3200 - V/mV
Voltage Gain
-2- REV. B
0P-297
ELECTRICAL CHARACTERISTICS at Vs " i15V, TA = +25°C, unless otherwise noted. Continued
OP-297A/E OP-297F 0P-297G
PARAMETER SYMBOL CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
InputVoltage IVR (Note 1) :13 f14 - 113 A14 - i13 t14 - v
Cem.mo.n-Mode CMR Vcse = 113V 120 140 - 114 135 - 114 135 - dB
Rejection
tyy S.upply PSR Vs = WN to i20V 120 130 - 114 125 - 114 125 - dB
Rejection
Output Voltage v RL = 10m t:13 :14 - t13 A14 - 11a tl 4 - v
Swing o RL = 2m A13 113.7 - A13 3:13] - &13 $13.7 -
Supply Current
Per Amprfer Isy No Load - 525 625 525 625 - 525 625 M
Supply Voltage Vs Operating Range td - 120 12 - t20 i2 - 120 V
Slew Rate SR 0.05 0.15 - 0.05 0.15 - 0.05 0.15 - V/ps
Gain Bandwith GBWP AV = +1 - 500 - - 500 - - 500 - kHz
Product
Channel . cs Vo = 20Vps - 150 - - 150 - - 150 - dB
Separation f0 = 10H2
- - - 3 - - - F
Capacitance Cm 3 3 p
1. Guaranteed by CMR test.
ELECTRICAL CHARACTERISTICS at Vs = ur15V, -55oC s TA S +125°C for OP-297A, unless otherwise noted.
OP-297A
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Offset Voltage Vos - 45 100 pV
Average Input Offset
V - . . 0
Voltage Drift TC os 0 2 0 6 WV/ C
Input Offset Current los VcM = 0V - 60 450 pA
Input Bias Current ks VoM = 0V - 60 i450 pA
Large-Signal
= 10V, R = 2kn 1 2700 - V/
Voltage Gain Avo Vo i L 200 mV
Input Voltage Range IVR (Note 1) t13 113.5 - V
Common-Mode Rejection CMR VCM = $13 114 130 - dB
Power Supply
. . PSR Vs=12.5VIo 120V 114 125 - dB
Rejection
Output Voltage Swing Vo RL =10k§2 t13 113.4 - V
Supply Current
d - 575 750
Per Amplifier lsv No Ltoa IIA
Supply Voltage Vs Operating Range t2.5 - 120 V
1. Guaranteed by CMR test.
REV. B
0P-297
ELECTRICAL CHARACTERISTICS at Vs = i15V, -u10oC 5 TA Lt oiist for OP-297E/F/G, unless otherwise noted.
OP-297E OP-297F OP-297G
PARAMETER SYMBOL CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
Input Offset
Voltage Vos - 35 100 - 80 300 - 1 10 400 WV
Average Input _
- . . _ . . - . . P
OffsetVoItage Drift TCVos 0 2 0 6 0 5 2 0 0 6 2 0 WV C
Input Offset
Current los VOM " 0V - 50 450 - 80 750 - 80 750 pA
Input Bias t V ov 50 1450 80 1750 80 1750 A
Current B GM = - - - p
Large-Signal
Voltage Gain Avo Vo = i10V, Rr. = 2ka 1200 3200 - 1000 2500 - 800 2500 - V/mV
InputVoltagtr IVR (Note 1) A13 113.5 - 113 AI3.5 - 113 113.5 - v
ctm.rr1tTMod'r CMR vCM = 113v 114 130 - 108 130 - 108 130 - dB
Rejection
tyy SUM" PSR vs = i2.5V ttt t20V 114 0.15 - 103 0.15 - 108 0.3 - dB
Rejection
Om.“ Voltage Vo Ru " 10m t13 113.4 - x13 $13.4 - :13 113.4 - v
Supply Current
Per Amplifer lsy No Load - 550 750 - 550 750 - 550 750 M
Supply Voltage Vs Operating Range 12.5 - 120 12.5 - i20 12.5 - A20 V
1. Guaranteed by CMR test.
CHANNEL SEPARATION TEST CIRCUIT
v, 20vW o 10Hz
Ts 2119
'-o Va
CHANNEL SEPARATION - 20 log (rat-xx,
--4-- REV. B
0P-297
DICE CHARACTERISTICS
PHPPPP
For additional DICE information, refer
to PMl's Data Book, Section 2.
DIE SIZE 0.071 x 0.1 14 inch, 8,094 sq. mils
(1.80 It 2.90 mm, 5.22 sq. mm)
WAFER TEST LIMITS at Vs = I15V, TA = +25°C, unless otherwise noted.
OP-297GBC
PARAMETER SYMBOL CONDITIONS LIMIT UNITS
Input Offset Voltage Vos 200 pV MAX
Input Offset Current los VCM = 0V 200 pA MAX
Input Bias Current lg VCM = CV 1200 pA MAX
Large-Signal
V = R = 2k /
Voltage Gain Avo o WV. L n 1200 v mV MIN
Input Voltage Range IVR (Note 1) 113 V MIN
Common-Mode Rejection CMR VCM = i13V 114 dB MIN
tyy S.uppiy PSR vs = 12Vto 118V 114 dB MIN
Rejection
. RL= 10k!) A13
OutputVoltage Swing Vo RL = 2kn All V MIN
Supply Current
Per Amplifer Isy No Load 625 p.A MAX
NOTES:
I. Guaranteed by CMR test.
Electrical tests are performed at wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed for
standard product dice. Consult factory to negotiate specifications based on dice lot qualifications through sample lot assembly and testing.
REV. B -5-
TYPICAL PERFORMANCE CHARACTERISTICS
TYPICAL DISTRIBUTION
OF INPUT OFFSET VOLTAGE
400 I I I I I I
120m MTS TA = 425%
Vs = 115V
VCM _ 0V
(0 300
o 200 :'
o n .' I. '. .. ". ". .. . .. u. .. '. " .. .
-100 -80 .-to -40 -20 0 2O 40 60 80 100
INPUT OFFSET VOLTAGE (WV)
INPUT BIAS, OFFSET
CURRENT vs TEMPERATURE
60 I I
\la- vs=115v
40 N. N. best--t"1.,
3 20 i'
g o "s,, "c,
- - los _
i -20 "N
z _ ''"s
-40 "s,
-75 -50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
EFFECTIVE OFFSET VOLTAGE
vs SOURCE RESISTANCE
BALANCED OR UNBALANCED
Vs = t15V
VCM = 0V
-55N; S TAS 1
EFFECTIVE OFFSET VOLTAGE (0V)
TA = +25°C
10 100 1k 10k 100k 1M 10M
SOURCE RESISTANCE in)
NUMBER OF UNITS
INPUT CURRENT (pA)
EFFECTIVE OFFSET VOLTAGE DRIFT (uwch
TYPICAL DISTRIBUTION
OF INPUT BIAS CURRENT
250 I I I _ I I I
1200 UNITS TA = +25°C
- vs = k15V
200 , i.' VCM = ov -
o .... .''. . .... '..''. .... . '..'
-100-80-60-40-20 o 20 40 60 80100
INPUT BIAS CURRENT (pA)
INPUT-BIAS, OFFSET
CURRENT vs
COMMON-MODE VOLTAGE
TA = L,
40 __Vs=i15V /|B__
20 // IB+
o r,.,,-"' ",ee'"'
w,,,,-''''" w,.--'"" Ios
~15 -1O -5 0 5 10 15
COMMON-MODE VOLTAGE (VOLTS)
EFFECTIVE TCVos
vs SOURCE RESISTANCE
BALANCED OR UNBALANCED
Vs = ttW
VCM ' 0V
100 1k 10k 100k 1M 10M 100M
SOURCE RESISTANCE (ft)
DEVIATION FROM FINAL VALUE (11V) NUMBER OF UNITS
SHORT-Cl RCUIT CURRENT (mA)
TYPICAL DISTRIBUTION
OF INPUT OFFSET CURRENT
400 I I I I I I
1900 t NITS T TA = +25°C
'. Vs-- 115V
300 T VCM = 0V
100 ff
0 .. ..
-100-80-60-40-20 0 20 40 60 80100
INPUT OFFSET CURRENT (pA)
INPUT OFFSET VOLTAGE
WARM-UP DRIFT
TA = +25°C
_ Vs = i15V
VCM = 0V
0 1 2 3 4 5
TIME AFTER POWER APPLIED (MINJTES)
SHORT-CIRCUIT CURRENT
vs TIME, TEMPERATURE
30 TA = -ssac
20 TA = +25%
1 0 TA = +125°c
5 vs = 115V
0 OUTPUT SHORTED
" TO GROUND
-1 5 TA = +125°C
-20 T = +2tPC
-30 T = -55''C
0 1 2 3 4
TIME F ROM OUTPUT SHORT (MINUTES)
REV. B
0P-297
TYPICAL PERFORMANCE CHARACTERISTICS Continued
TOTAL SUPPLY CURRENT
vs SUPPLY VOLTAGE
1300 I
NO LOAD
Cd.'". 1200 TA " +125°c
2 ,..--'''"'
ili, 1100 ./
g y" TA = +25%:
F; 1000 _..---"--
iii' TA = -ti5'%
9 w.,,.,----'"''''"
o Mi k10 t15 120
SUPPLY VOLTAGE (\OLTS)
NOISE DENSITY
vs FREQUENCY
a" TA-- +25°C
I Vs = 12V To i15V
5 100 CURRENT
f, NOISE
S VOLTAGE
<2 NOISE
1 10 100
FREQUENCY (H2)
OPEN-LOOP GAIN LINEARITY
RL" 10k!)
Vs = tttN
Vtw--.OV TA-- +125°c
TA = +25°C
TA = -55''C
DIFFERENTIAL INPUT VOLTAGE (1 OuV/DIV)
-10 .-5 0 5 10 15
OUTPUT VOLTAGE (VOLTS)
REV. B
CURRENT NOISE DENSITY (1N
COMMON—MODE REJECTION (dB)
COMMON-MODE REJECTION
vs FREQUENCY
TA = 425°C
140 vs a i15V
1 10 100 " 10k 100k 1M
FREQUENCY (Hz)
TOTAL NOISE DENSITY
vs SOURCE RESISTANCE
A TA = +25°c
:'il Vs = WN TO k20V
si.1, 1
9 1kHz
102 103 104 105 106 107
SOURCE RESISTANCE (n)
MAXIMUM OUTPUT SWING
OUTPUT SWING (vpp)
vs LOAD RESISTANCE
TA = +25°C
vs = 115v
AVCL = +1
to = 1m:
100 1k 10k
LOAD RESISTANCE (ft)
OPEN-LOOP GAIN (VlmV)
POWER SUPPLY REJ ECTION (dB)
POWER SUPPLY REJECTION
VS FREQUENCY
140 , I
v TA-- +25°C
V =i15V
120 N, ts, 2i' =11)va
N.' {SR
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
OPEN-LOOP GAIN
vs LOAD RESISTANCE
TA--- -5tPC
TA = +25°C
TA = +125°C
Vs = 1151/
V0 =110V
1 2 3 5 10 20
LOAD RESISTANCE (ld2)
MAXIMUM OUTPUT SWING
VS FREQUENCY
TA" +25°C
VS = 115V
A AVCL= +1
t 1%THD
Z RL = 10m
FREQUENCY (Hz)
