OP15 Datasheet, PDF (1/12 Pages) Analog Devices – Precision JFET-Input Operational Amplifiers

a
Precision JFET-Input
Operational Amplifiers
OP15/OP17
FEATURES
Significant Performance Advantages over LF155 and
LF157 Devices
Low Input Offset Voltages: 500 ␮V Max
Low Input Offset Voltage Drift: 2.0 ␮V/؇C
Minimum Slew Rate Guaranteed on All Models
Temperature-Compensated Input Bias Currents
Bias Current Specified Warmed-Up Over Temperature
Internal Compensation
Low Input Noise Current: 0.01 pA/÷Hz
High Common-Mode Rejection Ratio: 100 dB
Models with MIL-STD 883 Processing Available
OP15
156 Speed with 155 Dissipation: 80 mW Typ
Wide Bandwidth: 6 MHz
High Slew Rate: 13 V/␮s
Fast Settling to ±0.1%: 1,200 ns
OP17
Highest Slew Rate: 60 V/␮s
Fastest Settling to ±0.1%: 600 ns
Highest Gain Bandwidth Product (A_VCL = 5 Min): 30 MHz
Guaranteed Input Bias Current @ 125؇C
GENERAL DESCRIPTION
The ADI-JFET input series of devices offer clear advantages over
industry-generic devices and are superior in both cost and perfor-
mance to many dielectrically-isolated and hybrid op amps. All devices
offer offset voltages as low as 0.5 mV with TCV_OS guaranteed to
5 mV/∞C. A unique input bias cancellation circuit reduces the I_B
by a factor 10 over conventional designs. In addition ADI specifies
I_B and I_OS with the devices warmed up and operating at 25∞C ambient.
These devices were designed to provide real precision performance
along with high speed. Although they can be nulled, the design
objective was to provide low offset-voltage without nulling. Systems
generally become more cost effective as the number of trim circuits
is decreased. ADI achieves this performance by use of an improved
bipolar compatible JFET process coupled with on chip, zener-zap
offset trimming.
The OP15 provides an excellent combinations of high speed and
low input offset voltage. In addition, the OP15 offers the speed
of the 156A op amp with the power dissipation of a 155A. The
combination of a low input offset voltage of 500 mV, slew rate of
13 V/ms, and settling time of 1,200 ns to 0.1% makes the OP15
an op amp of both precision and speed. The additional features
of low supply current coupled with an input bias current makes
the OP15 ideal for a wide range of applications.
The OP17 has a slew rate of 60 V/ms and is the best choice for
applications requiring high closed-loop gain with high speed. See
OP42 datasheet for unity gain applications and the OP215 datasheet
for a dual configuration of the OP15.
V+
NONINVERTING
INPUT
V–
J5
R8*
R7*
Q5
NULL ^J8
NULL
Q6
Q16
R1
J1
R3
Q7
Q8
J11
J2
–INV
INPUT
Q12
J3
J4
C1
7.4pF
Q9
Q1
Q3
Q11 ^R5
Q13
R3
3.6k⍀
R4
Q16
J6
R2 C2
Q2
Q4
R6
3.6k⍀
Q15
*R7, R8 ARE ELECTRONICALLY
ADJUSTED ON CHIP FOR
MINIMUM OFFSET VOLTAGE.
Q19
Q24
Q17
R13
Q22
Q10
J10
Q23
J9
Q14
Q20
Q25
OUTPUT
Q21
R11
Figure 1. Simplified Schematic
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: [phone]
www.analog.com
Fax: [phone]
© Analog Devices, Inc., 2002