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PDF OP495 Data sheet ( Hoja de datos )
| Número de pieza | OP495 | |
| Descripción | DUAL/QUAD RAIL-TO-RAIL OPERATIONAL AMPLIFIERS | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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a
Dual/Quad Rail-to-Rail
Operational Amplifiers
OP295/OP495
FEATURES
Rail-to-Rail Output Swing
Single-Supply Operation: +3 V to +36 V
Low Offset Voltage: 300 V
Gain Bandwidth Product: 75 kHz
High Open-Loop Gain: 1000 V/mV
Unity-Gain Stable
Low Supply Current/Per Amplifier: 150 A max
APPLICATIONS
Battery Operated Instrumentation
Servo Amplifiers
Actuator Drives
Sensor Conditioners
Power Supply Control
GENERAL DESCRIPTION
Rail-to-rail output swing combined with dc accuracy are the key
features of the OP495 quad and OP295 dual CBCMOS opera-
tional amplifiers. By using a bipolar front end, lower noise and
higher accuracy than that of CMOS designs has been achieved.
Both input and output ranges include the negative supply, pro-
viding the user “zero-in/zero-out” capability. For users of 3.3
volt systems such as lithium batteries, the OP295/OP495 is
specified for three volt operation.
Maximum offset voltage is specified at 300 µV for +5 volt opera-
tion, and the open-loop gain is a minimum of 1000 V/mV. This
yields performance that can be used to implement high accuracy
systems, even in single supply designs.
The ability to swing rail-to-rail and supply +15 mA to the load
makes the OP295/OP495 an ideal driver for power transistors
and “H” bridges. This allows designs to achieve higher efficien-
cies and to transfer more power to the load than previously pos-
sible without the use of discrete components. For applications
PIN CONNECTIONS
8-Lead Narrow-Body SO
(S Suffix)
8-Lead Epoxy DIP
(P Suffix)
OUT A 1
–IN A 2
+IN A 3
V– 4
OP295
8 V+
7 OUT B
6 –IN B
5 +IN B
OUT A 1
–IN A 2
+IN A 3
V– 4
OP295
8 V+
7 OUT B
6 –IN B
5 +IN B
14-Lead Epoxy DIP
(P Suffix)
16-Lead SO (300 Mil)
(S Suffix)
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
OP495
14 OUT D
13 –IN D
12 +IN D
11 V–
10 +IN C
9 –IN C
8 OUT C
OUT A 1
16 OUT D
–IN A 2
+IN A 3
V+ 4
+IN B 5
OP495
15 –IN D
14 +IN D
13 V–
12 +IN C
–IN B 6
OUT B 7
11 –IN C
10 OUT C
NC 8
9 NC
NC = NO CONNECT
that require driving inductive loads, such as transformers, in-
creases in efficiency are also possible. Stability while driving
capacitive loads is another benefit of this design over CMOS
rail-to-rail amplifiers. This is useful for driving coax cable or
large FET transistors. The OP295/OP495 is stable with loads in
excess of 300 pF.
The OP295 and OP495 are specified over the extended indus-
trial (–40°C to +125°C) temperature range. OP295s are avail-
able in 8-pin plastic and ceramic DIP plus SO-8 surface mount
packages. OP495s are available in 14-pin plastic and SO-16
surface mount packages. Contact your local sales office for
MIL-STD-883 data sheet.
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
© Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
1 page  
3.10
VS = +3V
3.00
RL = 100k
2.90 RL = 10k
2.80
2.70
RL = 2k
2.60
2.50
–50
–25
0 25 50
TEMPERATURE – °C
75 100
Output Voltage Swing vs. Temperature
200
BASED ON 600 OP AMPS
175
150
VS = +5V
TA = +25°C
125
100
75
50
25
0
–250 –200 –150 –100 –50 0
50 100 150 200 250
INPUT OFFSET VOLTAGE – µV
OP295 Input Offset (VOS) Distribution
250
BASED ON 600 OP AMPS
225
200
VS = +5V
–40° ≤ TA ≤ +85°C
175
150
125
100
75
50
25
0
0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2
TC – VOS – µV/°C
OP295 TC–VOS Distribution
Typical Characteristics–OP295/OP495
5.10
VS = +5V
5.00
RL = 100k
4.90 RL = 10k
4.80
4.70
RL = 2k
4.60
4.50
–50
–25
0 25 50
TEMPERATURE – °C
75 100
Output Voltage Swing vs. Temperature
500
BASED ON 1200 OP AMPS
450
400
VS = +5V
TA = +25°C
350
300
250
200
150
100
50
0
–100 –50
0 50 100 150 200 250 300
INPUT OFFSET VOLTAGE – µV
OP495 Input Offset (VOS) Distribution
500
BASED ON 1200 OP AMPS
450
400
VS = +5V
–40° ≤ TA ≤ +85°C
350
300
250
200
150
100
50
0
0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2
TC – VOS – µV/°C
OP495 TC–VOS Distribution
REV. B
–5–
5 Page 
OP295/OP495
100k
V+
58.7k
100k
3
1/2
OP295/
OP495
2
C
8
1 FREQ OUT
4
fOSC =
1
RC
< 350Hz @ V+ = +5V
R
Figure 13. Square Wave Oscillator Has Stable Frequency
Regardless of Supply Changes
2.2µF
VIN
10k
10k
90.9k
V+
1/4
OP295/
100k OP495
SPEAKER
1/4
OP295/
OP495
20k
V+
20k
1/4
OP295/
OP495
Figure 14. Single Supply Differential Speaker Driver
High Accuracy, Single-Supply, Low Power Comparator
The OP295/OP495 makes an accurate open-loop comparator.
With a single +5 V supply, the offset error is less than 300 µV. Fig-
ure 15 shows the OP295/OP495’s response time when operating
open-loop with 4 mV overdrive. It exhibits a 4 ms response time at
the rising edge and a 1.5 ms response time at the falling edge.
100
90
INPUT
1V
(5mV OVERDRIVE
@ OP295 INPUT)
OUTPUT
10
0%
2V
5ms
Figure 15. Open-Loop Comparator Response Time with
5 mV Overdrive
OP295/OP495 SPICE MODEL Macro-Model
* Node Assignments
* Noninverting Input
* Inverting Input
* Positive Supply
* Negative Supply
* Output
*
*
.SUBCKT OP295 1 2 99 50
20
*
* INPUT STAGE
*
I1 99 4 2E-6
R1 1 6 5E3
R2 2 5 5E3
CIN 1 2 2E-12
IOS 1 2 0.5E-9
D1 5 3 DZ
D2 6 3 DZ
EOS 7 6 POLY (1) (31,39) 30E-6 0.024
Q1 8 5 4 QP
Q2 9 7 4 QP
R3 8 50 25.8E3
R4 9 50 25.8E3
*
* GAIN STAGE
*
R7 10 98 270E6
G1 98 10 POLY (1) (9,8) –4.26712E-9 27.8E-6
EREF 98 0 (39, 0) 1
R5 99 39 100E3
R6 39 50 100E3
*
* COMMON MODE STAGE
*
ECM 30 98 POLY(2) (1,39) (2,39) 0 0.5 0.5
R12 30 31 1E6
R13 31 98 100
*
* OUTPUT STAGE
*
I2 18 50 1.59E-6
V2 99 12 DC 2.2763
Q4 10 14 50 QNA 1.0
R11 14 50 33
M3 15 10 13 13 MN L=9E-6 W=102E-6 AD=15E-10 AD=15E-10
M4 13 10 50 50 MN L=9E-6 W=50E-6 AD=75E-11 AS=75E-11
D8 10 22 DX
V3 22 50 DC 6
M2 20 10 14 14 MN L=9E-6 W=2000E-6 AD=30E-9 AS=30E-9
Q5 17 17 99 QPA 1.0
Q6 18 17 99 QPA 4.0
R8 18 99 2.2E6
Q7 18 19 99 QPA 1.0
R9 99 19 8
C2 18 99 20E-12
M6 15 12 17 99 MP L=9E-6 W=27E-6 AD=405E-12 AS=405E-12
M1 20 18 19 99 MP L=9E-6 W=2000E-6 AD=30E-9 AS=30E-9
D4 21 18 DX
V4 99 21 DC 6
R10 10 11 6E3
C3 11 20 50E-12
.MODEL QNA NPN (IS=1.19E-16 BF=253 NF=0.99 VAF=193 IKF=2.76E-3
+ ISE=2.57E-13 NE=5 BR=0.4 NR=0.988 VAR=15 IKR=1.465E-4
+ ISC=6.9E-16 NC=0.99 RB=2.0E3 IRB=7.73E-6 RBM=132.8 RE=4
RC=209
+ CJE=2.1E-13 VJE=0.573 MJE=0.364 FC=0.5 CJC=1.64E-13 VJC=0.534
MJC=0.5
+ CJS=1.37E-12 VJS=0.59 MJS=0.5 TF=0.43E-9 PTF=30)
.MODEL QPA PNP (IS=5.21E-17 BF=131 NF=0.99 VAF=62 IKF=8.35E-4
+ ISE=1.09E-14 NE=2.61 BR=0.5 NR=0.984 VAR=15 IKR=3.96E-5
+ ISC=7.58E-16 NC=0.985 RB=1.52E3 IRB=1.67E-5 RBM=368.5 RE=6.31
RC=354.4
+ CJE=1.1E-13 VJE=0.745 MJE=0.33 FC=0.5 CJC=2.37E-13 VJC=0.762
MJC=0.4
+ CJS =7.11E-13 VJS=0.45 MJS=0.412 TF=1.0E-9 PTF=30)
.MODEL MN NMOS (LEVEL=3 VTO=1.3 RS=0.3 RD=0.3
+ TOX=8.5E-8 LD=1.48E-6 NSUB=1.53E16 UO=650 DELTA=10 VMAX=2E5
+ XJ=1.75E-6 KAPPA=0.8 ETA=0.066 THETA=0.01 TPG=1 CJ=2.9E-4
PB=0.837
+ MJ=0.407 CJSW=0.5E-9 MJSW=0.33)
.MODEL MP PMOS (LEVEL=3 VTO=–1.1 RS=0.7 RD=0.7
+ TOX=9.5E-8 LD=1.4E-6 NSUB=2.4E15 UO=650 DELTA=5.6 VMAX=1E5
+ XJ=1.75E-6 KAPPA=1.7 ETA=0.71 THETA=5.9E-3 TPG=–1 CJ=1.55E-4
PB=0.56
+ MJ=0.442 CJSW=0.4E-9 MJSW=0.33)
.MODEL DX D(IS=1E-15)
.MODEL DZ D (IS=1E-15, BV=7)
.MODEL QP PNP (BF=125)
.ENDS
REV. B
–11–
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet OP495.PDF ] | |
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