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Analog Devices Semiconductor Electronic Components Datasheet

OP285 Datasheet

Dual 9 MHz Precision Operational Amplifier

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a
Dual 9 MHz Precision
Operational Amplifier
OP285*
FEATURES
Low Offset Voltage: 250 V
Low Noise: 6 nV/Hz
Low Distortion: 0.0006%
High Slew Rate: 22 V/s
Wide Bandwidth: 9 MHz
Low Supply Current: 5 mA
Low Offset Current: 2 nA
Unity-Gain Stable
SO-8 Package
APPLICATIONS
High Performance Audio
Active Filters
Fast Amplifiers
Integrators
GENERAL DESCRIPTION
The OP285 is a precision high-speed amplifier featuring the
Butler Amplifier front-end. This new front-end design com-
bines the accuracy and low noise performance of bipolar
transistors with the speed of JFETs. This yields an amplifier
with high slew rates, low offset and good noise performance
at low supply currents. Bias currents are also low compared
to bipolar designs.
The OP285 offers the slew rate and low power of a JFET
amplifier combined with the precision, low noise and low
drift of a bipolar amplifier. Input offset voltage is laser-trimmed
and guaranteed less than 250 µV. This makes the OP285 useful
in dc-coupled or summing applications without the need for
special selections or the added noise of additional offset
adjustment circuitry. Slew rates of 22 V/µs and a bandwidth
of 9 MHz make the OP285 one of the most accurate medium
speed amplifiers available.
PIN CONNECTIONS
8-Lead Narrow-Body SO (S-Suffix)
OUT A 1
–IN A 2
+IN A 3
V– 4
TOOPPV2I8E5W
(Not to Scale)
8 V+
7 OUT B
6 –IN B
5 +IN B
8-Lead Epoxy DIP (P-Suffix)
OUT A 1
IN A 2
+IN A 3
V4
+
+
OP285
8 V+
7 OUT B
6 IN B
5 +IN B
The combination of low noise, speed and accuracy can be used
to build high speed instrumentation systems. Circuits such as
instrumentation amplifiers, ramp generators, bi-quad filters and
dc-coupled audio systems are all practical with the OP285. For
applications that require long term stability, the OP285 has a
guaranteed maximum long term drift specification.
The OP285 is specified over the XIND—extended industrial—
(–40°C to +85°C) temperature range. OP285s are available in
8-pin plastic DIP and SOIC-8 surface mount packages.
*Patents pending
REV. A
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 that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001


Analog Devices Semiconductor Electronic Components Datasheet

OP285 Datasheet

Dual 9 MHz Precision Operational Amplifier

No Preview Available !

OP285–SPECIFICATIONS (@ Vs = ؎15.0 V, TA = 25؇C, unless otherwise noted.)
Parameter
Symbol Conditions
Min Typ Max
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection
VOS
VOS
IB
IB
IOS
IOS
VCM
CMRR
Large-Signal Voltage Gain
Common-Mode Input Capacitance
Differential Input Capacitance
Long-Term Offset Voltage
Offset Voltage Drift
AVO
AVO
AVO
VOS
VOS/T
–40°C TA +85°C
VCM = 0 V
VCM = 0 V, –40°C TA +85°C
VCM = 0 V
VCM = 0 V, –40°C TA +85°C
VCM = ± 10.5 V,
–40°C TA +85°C
RL = 2 k
RL = 2 k, –40°C TA +85°C
RL = 600
Note 1
–10.5
80
250
175
35
100
2
2
106
200
7.5
3.7
1
250
600
350
400
± 50
± 100
10.5
300
OUTPUT CHARACTERISTICS
Output Voltage Swing
VO
VO
RL = 2 k
RL = 2 k, –40°C TA +85°C
RL = 600 , VS = ± 18 V
–13.5
–13
+13.9 +13.5
+13.9 +13
–16/+14
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current
Supply Voltage Range
PSRR
PSRR
ISY
ISY
VS
VS = ± 4.5 V to ± 18 V
VS = ± 4.5 V to ± 18 V,
–40°C TA +85°C
VS = ± 4.5 V to ± 18 V, VO = 0 V,
RL = x, –40°C TA +85°C
VS = ± 22 V, VO, = 0 V, RL = x
–40°C TA +85°C
85
80
± 4.5
111
4
5
5.5
± 22
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
Settling Time
Distortion
Voltage Noise Density
Current Noise Density
Headroom
SR
GBP
o
ts
ts
en
en
in
RL = 2 k
To 0.1%, 10 V Step
To 0.01%, 10 V Step
AV = 1, VOUT = 8.5 V p-p,
f = 1 kHz, RL = 2 k
f = 30 Hz
f = 1 kHz
f = 1 kHz
THD + Noise 0.01%,
RL = 2 k, VS = ± 18 V
15 22
9
62
625
750
–104
7
6
0.9
>12.9
NOTE
1Long-term offset voltage is guaranteed by a 1,000 hour life test performed on three independent wafer lots at 125 °C, with an LTPD of 1.3.
Specifications subject to change without notice.
Unit
µV
µV
nA
nA
nA
nA
V
dB
V/mV
V/mV
V/mV
pF
pF
µV
µV/°C
V
V
V
dB
dB
mA
mA
V
V/µs
MHz
Degrees
ns
ns
dB
nV/Hz
nV/Hz
pA/Hz
dBu
–2– REV. A


Part Number OP285
Description Dual 9 MHz Precision Operational Amplifier
Maker Analog Devices
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OP285 Datasheet PDF






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