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PDF OP275 Data sheet ( Hoja de datos )
| Número de pieza | OP275 | |
| Descripción | Dual Bipolar/JFET / Audio Operational Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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a
Dual Bipolar/JFET, Audio
Operational Amplifier
OP275*
FEATURES
Excellent Sonic Characteristics
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 Voltage: 1 mV
Low Offset Current: 2 nA
Unity Gain Stable
SOIC-8 Package
APPLICATIONS
High Performance Audio
Active Filters
Fast Amplifiers
Integrators
GENERAL DESCRIPTION
The OP275 is the first amplifier to feature the Butler Amplifier
front-end. This new front-end design combines both bipolar
and JFET transistors to attain amplifiers with the accuracy and
low noise performance of bipolar transistors, and the speed and
sound quality of JFETs. Total Harmonic Distortion plus Noise
equals that of previous audio amplifiers, but at much lower sup-
ply currents.
A very low l/f corner of below 6 Hz maintains a flat noise density
response. Whether noise is measured at either 30 Hz or 1 kHz,
it is only 6 nV/√Hz. The JFET portion of the input stage gives
the OP275 its high slew rates to keep distortion low, even when
large output swings are required, and the 22 V/µs slew rate of
the OP275 is the fastest of any standard audio amplifier. Best of
all, this low noise and high speed are accomplished using less
than 5 mA of supply current, lower than any standard audio
amplifier.
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
OP275
8 V+
7 OUT B
6 –IN B
5 +IN B
OUT A 1
–IN A 2
+IN A 3
V– 4
OP275 8 V+
7 OUT B
6 –IN B
5 +IN B
Improved dc performance is also provided with bias and offset
currents greatly reduced over purely bipolar designs. Input off-
set voltage is guaranteed at 1 mV and is typically less than
200 µV. This allows the OP275 to be used in many dc coupled
or summing applications without the need for special selections
or the added noise of additional offset adjustment circuitry.
The output is capable of driving 600 Ω loads to 10 V rms while
maintaining low distortion. THD + Noise at 3 V rms is a low
0.0006%.
The OP275 is specified over the extended industrial (–40°C to
+85°C) temperature range. OP275s are available in both plastic
DIP and SOIC-8 packages. SOIC-8 packages are available in
2500 piece reels. Many audio amplifiers are not offered in
SOIC-8 surface mount packages for a variety of reasons; how-
ever, the OP275 was designed so that it would offer full perfor-
mance in surface mount packaging.
*Protected by U.S. Patent No. 5,101,126.
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
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  
11 65
10 Øm
9
GBW
8
60
55
50
7
–50 –25 0 25 50 75
TEMPERATURE – °C
40
100
Gain Bandwidth Product, Phase
Margin vs. Temperature
30
25
20
15
10
5
0
1k
TA = +25°C
VS = ±15V
AVCL = +1
RL = 2kΩ
10k 100k 1M
FREQUENCY – Hz
10M
Maximum Output Swing vs.
Frequency
300
VS = ±15V
250
200
150
100
50
0
–50 –25 0 25 50 75
TEMPERATURE – °C
100
Input Bias Current vs. Temperature
100
90
80
70
60
50
40
30
20
10
0
0
AVCL = +1
NEGATIVE EDGE
AVCL = +1
POSITIVE EDGE
VS = ±15V
RL = 2kΩ
VIN = 100mV p-p
100 200 300 400
LOAD CAPACITANCE – pF
500
Small-Signal Overshoot vs. Load
Capacitance
OP275
16
14
–VOM
12
10
8
6 +VOM
4
TA = +25°C
2 VS = ±15V
0
100
1k
LOAD RESISTANCE – Ω
10k
Maximum Output Voltage vs. Load
Resistance
5.0
4.5
TA = +85°C
4.0 TA = +25°C
TA = –40°C
3.5
3.0
0
±5 ±10 ±15 ±20
SUPPLY VOLTAGE – V
±25
Supply Current vs. Supply Voltage
120
110
100
90
80
70
60
50
40
30
20
–50
SINK
VS = ±15V
SOURCE
–25 0
25 50 75
TEMPERATURE – °C
100
Short Circuit Current vs. Temperature
5
VS = ±15V
TA = +25°C
4
3
2
1
10 100 1k 100k
FREQUENCY – Hz
Current Noise Density vs. Frequency
500
VS = ±15V
–40°C to +85°C
400
BASED ON 920 OP AMPS
300
200
100
0
01
23 4 5 67
TCVOS – µV/°C
8 9 10
TCVOS Distribution
REV. A
–5–
5 Page 
OP275 SPICE Model
*
* Node assignments
* noninverting input
* inverting input
* positive supply
* negative supply
* output
*
*
.SUBCKT OP275 1 2 99 50 34
*
* INPUT STAGE & POLE AT 100 MHz
*
R3 5 51 2.188
R4 6 51 2.188
CIN 1 2 3.7E-12
CM1 1 98 7.5E-12
CM2 2 98 7.5E-12
C2 5 6 364E-12
I1 97 4 100E-3
IOS 1 2 1E-9
EOS 9 3 POLY(1) 26 28 0.5E-3 1
Q1 5 2 7
QX
Q2 6 9 8
QX
R5 7 4 1.672
R6 8 4 1.672
D1 2 36 DZ
D2 1 36 DZ
EN 3 1 10
01
GN1 0 2 13
0 1E-3
GN2 0 1 16
0 1E-3
*
EREF 98 0 28
01
EP 97 0 99
01
EM 51 0 50
01
*
* VOLTAGE NOISE SOURCE
*
DN1 35 10 DEN
DN2 10 11 DEN
VN1 35 0 DC
2
VN2 0 11 DC
2
*
* CURRENT NOISE SOURCE
*
DN3 12 13 DIN
DN4 13 14 DIN
VN3 12 0 DC
2
VN4 0 14 DC
2
*
* CURRENT NOISE SOURCE
*
DN5 15 16 DIN
DN6 16 17 DIN
VN5 15 0 DC
2
VN6 0 17 DC
2
*
* GAIN STAGE & DOMINANT POLE AT 32 Hz
*
R7 18 98 1.09E6
C3 18 98 4.55E-9
G1 98 18 5
6 4.57E-1
V2 97 19 1.35
V3 20 51 1.35
D3 18 19 DX
D4 20 18 DX
*
REV. A
OP275
* POLE/ZERO PAIR AT 1.5 MHz/2.7 MHz
*
R8 21 98 1E-3
R9 21 22 1.25E-3
C4 22 98 47.2E-12
G2 98 21 18
28 1E-3
*
* POLE AT 100 MHz
*
R10 23 98 1
C5 23 98 1.59E-9
G3 98 23 21
28 1
*
* POLE AT 100 MHz
*
R11 24 98 1
C6 24 98 1.59E-9
G4 98 24 23
28 1
*
* COMMON-MODE GAIN NETWORK WITH ZERO AT
1 kHz
*
R12 25 26 1E6
C7 25 26 1.5915E-12
R13 26 98 1
E2 25 98 POLY(2) 1 98 2 98 0 2.50 2.50
*
* POLE AT 100 MHz
*
R14 27 98 1
C8 27 98 1.59E-9
G5 98 27 24
28 1
*
* OUTPUT STAGE
*
R15 28 99 100E3
R16 28 50 100E3
C9 28 50 1E-6
ISY 99 50 1.85E-3
R17 29 99 100
R18 29 50 100
L2 29 34 1E-9
G6 32 50 27
29 10E-3
G7 33 50 29
27 10E-3
G8 29 99 99
27 10E-3
G9 50 29 27
50 10E-3
V4 30 29 1.3
V5 29 31 3.8
F1 29 0 V4
1
F2 0 29 V5
1
D5 27 30 DX
D6 31 27 DX
D7 99 32 DX
D8 99 33 DX
D9 50 32 DY
D10 50 33 DY
*
* MODELS USED
*
.MODEL QX PNP(BF=5E5)
.MODEL DX D(IS=1E-12)
.MODEL DY D(IS=1E-15 BV=50)
.MODEL DZ D(IS=1E-15 BV=7.0)
.MODEL DEN D(IS=1E-12 RS=4.35K KF=1.95E-15 AF=1)
.MODEL DIN D(IS=1E-12 RS=268 KF=1.08E-15 AF=1)
.ENDS
–11–
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet OP275.PDF ] | |
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