Analog Devices SSM2143 Datasheet

12k

12k

6k

6k

–IN

+IN

SSM2143

V

OUT

REFERENCE

V+

V–

SENSE

Ω

Ω

Ω

Ω

1
2
3
45

6

7

8

REF

–IN
+IN

V–

OP-482

NC

V+

SENSE

SSM2143

TOP VIEW

(NOT TO SCALE)

NC = NO CONNECT

V

OUT

–6 dB Differential

a

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/ms typ
Wide Bandwidth: 7 MHz typ (G = 1/2)
Two Gain Levels Available: G = 1/2 or 2
Low Cost

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/µs

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.

Line Receiver

SSM2143

FUNCTIONAL BLOCK DIAGRAM

PIN CONNECTIONS

Epoxy Mini-DIP (P Suffix)

and

SOIC (S Suffix)

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: [phone] Fax: [phone]

(VS = 615 V, –408C ≤ TA ≤ +858C, G = 1/2, unless otherwise noted.

SSM2143–SPECIFICA TIONS

Typical specifications apply at TA = +258C)

Parameter Symbol Conditions Min Typ Max Units

AUDIO PERFORMANCE

Total Harmonic Distortion Plus Noise THD+N V

= 10 V rms, RL = 10 kΩ, f = 1 kHz 0.0006 %

IN

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
Small Signal Bandwidth BW

–3 dB

= 2 kΩ, CL = 200 pF 6 10 V/µs

L

RL = 2 kΩ, CL = 200 pF

G = 1/2 7 MHz
G = 2 3.5 MHz

INPUT

Input Offset Voltage V

IOS

Common-Mode Rejection CMR V

VCM = 0 V, RTI, G = 2 –1.2 0.05 +1.2 mV

= ±10 V, RTO

CM

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

= ±6 V to ±18 V 90 110 dB

S

Input Voltage Range IVR Common Mode ±15 V

Differential ±28 V

OUTPUT

Output Voltage Swing V

O

RL = 2 kΩ±13 ±14 V
Minimum Resistive Load Drive 2kΩ
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 kΩ
Voltage Range ±10 V

POWER SUPPLY

Supply Voltage Range V
Supply Current I

Specifications subject to change without notice.

ABSOLUTE MAXIMUM RATINGS

SY

S

VCM = 0 V, RL = ∞±2.7 ±4.0 mA

ORDERING GUIDE

±6 ±18 V

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

) . . . . . . . . . . . . . . . . . . . . +150°C

J

Lead Temperature (Soldering, 60 sec) . . . . . . . . . . . . +300°C

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.

Operating
Temperature Package Package

Thermal Resistance

8-Pin Plastic DIP (P): θ
8-Pin SOIC (S): θ

= 103, θJC = 43 . . . . . . . . . °C/W

JA

= 150, θJC = 43. . . . . . . . . . . . . . °C/W

JA

–2–

REV. 0

 100

SSM2143



1µs

 90

100

90

10
 0%



50mV

Figure 1. Small-Signal Transient Response (VIN = ±200 mV,
G = 1/2, R

= 2 kΩ, VS = ±15 V, TA = +25°C)

L

Figure 3. THD+N vs. Frequency (VS = ±15 V,
V

= 10 V rms, with 80 kHz Filter)

IN

10
0%

5V

5µs

Figure 2. Large Signal Transient Response (VIN = +24 dBu,
G = 1/2, R

= 2 kΩ VS = ±15 V, TA = +25°C)

L

Figure 4. Headroom (VS = ±15 V, RL = 10 kΩ,
with 80 kHz Filter)

Figure 5. Dynamic Intermodulation Distortion, DIM-100
(V

= ±15 V, RL = 100 kΩ)

S

REV. 0

1.0

0.1

0.01

THD+N – %

0.001

0.0001
100 10k

1k

LOAD RESISTANCE – Ω

Figure 6. THD+N vs. Load (VS = ±15 V, VIN = 10 V rms, with
1 kHz Sine, 80 kHz Filter)

–3–

100k