OP295GBC View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
OP295GBC Datasheet PDF : 12 Pages
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OP295/OP495
100k
V+
58.7k
3
1/2
OP295/
OP495
2
100k
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
10k
2.2µF
VIN
10k
90.9k
V+
1/4
OP295/
100k OP495
SPEAKER
1/4
OP295/
OP495
20k
20k
V+
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.
1V
100
90
INPUT
(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–
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