SSM2143.pdf

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SSM2143 -6dB Differential Line Receiver
a
–6 dB Differential
Line Receiver
SSM2143
FEATURES
High Common-Mode Rejection
DC: 90 dB typ
60 Hz: 90 dB typ
20 kHz: 85 dB typ
Ultralow THD: 0.0006% typ @ 1 kHz
Fast Slew Rate: 10 V/ m s typ
Wide Bandwidth: 7 MHz typ (G = 1/2)
Two Gain Levels Available: G = 1/2 or 2
Low Cost
FUNCTIONAL BLOCK DIAGRAM
12k
W
6k
W
–IN
SENSE
V+
V OUT
V–
12k
W
6k
W
+IN
REFERENCE
SSM2143
PIN CONNECTIONS
GENERAL DESCRIPTION
The SSM2143 is an integrated differential amplifier intended to
receive balanced line inputs in audio applications requiring a
high level of immunity from common-mode noise. The device
provides a typical 90 dB of common-mode rejection (CMR),
which is achieved by laser trimming of resistances to better than
0.005%.
Additional features of the device include a slew rate of 10 V/
Epoxy Mini-DIP (P Suffix)
and
SOIC (S Suffix)
REF
–IN
+IN
V–
1
2
3
4
8
NC
V+
SSM2143
TOP VIEW
(NOT TO SCALE)
7
6
V OUT
s
and wide bandwidth. Total harmonic distortion (THD) is less
than 0.004% over the full audio band, even while driving low
impedance loads. The SSM2143 input stage is designed to
handle input signals as large as +28 dBu at G = 1/2. Although
primarily intended for G = 1/2 applications, a gain of 2 can be
realized by reversing the +IN/–IN and SENSE/REFERENCE
connections.
When configured for a gain of 1/2, the SSM2143 and SSM2142
Balanced Line Driver provide a fully integrated, unity gain
solution to driving audio signals over long cable runs. For
similar performance with G = 1, see SSM2141.
m
5
SENSE
OP-482
NC = NO CONNECT
REV. 0
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
174405676.048.png
SSM2143–SPECIFICATIONS
Parameter
C, G = 1/2, unless otherwise noted.
Typical specifications apply at T A = +25
6
15 V, –40
8
C
£
T A
£
+85
8
8
C)
Symbol
Conditions
Min Typ
Max
Units
AUDIO PERFORMANCE
Total Harmonic Distortion Plus Noise THD+N V IN = 10 V rms, R L = 10 kW, f = 1 kHz
0.0006
%
Signal-to-Noise Ratio
SNR
0 dBu = 0.775 V rms, 20 kHz BW, RTI
–107.3
dBu
Headroom
HR
Clip Point = 1% THD+N
+28.0
dBu
DYNAMIC RESPONSE
Slew Rate
SR
R L = 2 kW, C L = 200 pF
6
10
V/ms
Small Signal Bandwidth
BW –3 dB
R L = 2 kW, C L = 200 pF
G = 1/2
7
MHz
G = 2
3.5
MHz
INPUT
Input Offset Voltage
V IOS
V CM = 0 V, RTI, G = 2
–1.2 0.05
+1.2
mV
Common-Mode Rejection
CMR
V CM = ± 10 V, RTO
f = dc
70
90
dB
f = 60 Hz
90
dB
f = 20 kHz
85
dB
f = 400 kHz
60
dB
Power Supply Rejection
PSR
V S = ± 6 V to ± 18 V
90
110
dB
Input Voltage Range
IVR
Common Mode
± 15
V
Differential
± 28
V
OUTPUT
Output Voltage Swing
V O
R L = 2 k
W
±
13
±
14
V
Minimum Resistive Load Drive
2
k
W
Maximum Capacitive Load Drive
300
pF
Short Circuit Current Limit
I SC
+45, –20
mA
GAIN
Gain Accuracy
–0.1 0.03
0.1
%
REFERENCE INPUT
Input Resistance
18
k
W
Voltage Range
±
10
V
POWER SUPPLY
Supply Voltage Range
V S
± 6
± 18
V
Supply Current
I SY
V CM = 0 V, R L = ¥
± 2.7
± 4.0
mA
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V
Common-Mode Input Voltage . . . . . . . . . . . . . . . . . . . . ± 22 V
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . ± 44 V
Output Short Circuit Duration . . . . . . . . . . . . . . .Continuous
Operating Temperature Range . . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Junction Temperature (T J ) . . . . . . . . . . . . . . . . . . . . +150°C
Lead Temperature (Soldering, 60 sec) . . . . . . . . . . . . +300°C
Thermal Resistance
8-Pin Plastic DIP (P): q JA = 103, q JC = 43 . . . . . . . . .
ORDERING GUIDE
Operating
Temperature
Package
Package
Model
Range
Description
Option
SSM2143P –40°C to +85°C 8-Pin Plastic DIP N-8
SSM2143S* –40°C to +85°C 8-Pin SOIC
SO-8
*Contact sales office for availability.
°C/W
8-Pin SOIC (S): q JA = 150, q JC = 43. . . . . . . . . . . . . .
°C/W
–2–
REV. 0
(V S =
174405676.053.png
SSM2143
1
s
100
100
90
90
10
10
0%
0%
50mV
5V
5
s
Figure 1. Small-Signal Transient Response (V IN = ± 200 mV,
G = 1/2, R L = 2 k W , V S = ± 15 V, T A = +25 ° C)
Figure 2. Large Signal Transient Response (V IN = +24 dBu,
G = 1/2, R L = 2 k W V S = ± 15 V, T A = +25 ° C)
Figure 3. THD+N vs. Frequency (V S = ± 15 V,
V IN = 10 V rms, with 80 kHz Filter)
Figure 4. Headroom (V S = ± 15 V, R L = 10 k W ,
with 80 kHz Filter)
1.0
0.1
0.01
0.001
0.0001
100
1k
10k
100k
LOAD RESISTANCE – W
Figure 5. Dynamic Intermodulation Distortion, DIM-100
(V S = ± 15 V, R L = 100 k W )
Figure 6. THD+N vs. Load (V S = ± 15 V, V IN = 10 V rms, with
1 kHz Sine, 80 kHz Filter)
REV. 0
–3–
m
m
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SSM2143
40
30
V S = ±15V
T A = +25°C
20
V S =
±
15V
T A = +25
°
C
10
0
–10
–20
–30
100
1k
10k
100k
1M
10M
FREQUENCY – Hz
Figure 7. Closed-Loop Gain vs. Frequency, 20 Hz to 20 kHz
(Gain of 1/2 Normalized to 0 dB)
Figure 8. Closed-Loop Gain vs. Frequency, 100 Hz to
10 MHz
180
120
T A = +25°C
V S = ±15V
V S = ±15V
135
T A = +25°C
R L = 2k
W
100
90
45
80
0
60
–45
40
–90
–135
20
–180
0
100
1k
10k
100k
1M
10M
100
1k
10k
FREQUENCY – Hz
100k
1M
FREQUENCY – Hz
Figure 9. Closed-Loop Phase vs. Frequency
Figure 10. Common-Mode Rejection vs. Frequency
140
10
V S = ±15V
V S = ±15V
120
T A = +25°C
T A = +25°C
8
100
80
6
–PSRR
60
4
+PSRR
40
2
20
0
0
10
100
1k
10k
100k
1M
100
1k
10k
FREQUENCY – Hz
100k
1M
FREQUENCY – Hz
Figure 11. Power Supply Rejection vs. Frequency
Figure 12. Closed-Loop Output Impedance vs. Frequency
–4–
REV. 0
174405676.037.png 174405676.038.png
SSM2143
6
12.5V
T A = +25°C
T = +25 ° C
S
V = ± 15V
V S = ±15V
5
G = 1/2
10.0V
R L = 2k W
4
7.5V
3
5.0V
2
1
2.5V
0
0V
1k
10k
100k
1M
10M
10
100
1k
10k
FREQUENCY – Hz
LOAD RESISTANCE –
W
Figure 13. Output Voltage Swing vs. Frequency
Figure 14. Output Voltage Swing vs. Load Resistance
40
120
T = +25
C
V S = ±15V
100
T A = +25°C
30
80
20
60
40
10
20
0
0
0
± 5
± 10
± 15
± 20
1
10
100
1k
10k
SUPPLY VOLTAGE
FREQUENCY – Hz
Figure 15. Output Voltage Swing vs. Supply Voltage
Figure 16. Voltage Noise Density vs. Frequency
1s
10ms
100
100
90
90
0.5 m V
5 m V
0V
0V
–0.5
m
V
–5 m V
10
10
0%
0%
5mV
5mV
Figure 17. Low Frequency Voltage Noise from 0.1 Hz
to 10 Hz*
Figure 18. Voltage Noise from 0 kHz to 1 kHz*
*The photographs in Figure 17 through Figure 19 were taken at V S =
±
15 V and T A = +25
°
C, using an external amplifier with a gain of 1000.
REV. 0
–5–
A
°
A
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