Analog Devices SSM2143S, SSM2143P Datasheet

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/ms typ

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

FUNCTIONAL BLOCK DIAGRAM

12kΩ	6kΩ
–IN	SENSE
	V+
	VOUT
	V–
12k Ω	6kΩ

+IN REFERENCE

SSM2143

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.

PIN CONNECTIONS

Epoxy Mini-DIP (P Suffix)

and

SOIC (S Suffix)

REF
	1			8	NC
–IN			SSM2143		V+
	2			7
+IN			TOP VIEW		VOUT
	3			6
			(NOT TO SCALE)
V–					SENSE
	4		OP-482	5
		NC = NO CONNECT

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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: [phone] Fax: [phone]

SSM2143–SPECIFICATIONS			(VS = 615 V, –408C ≤ TA ≤ +858C, G = 1/2, unless otherwise noted.
			Typical specifications apply at TA = +258C)
Parameter	Symbol		Conditions	Min	Typ	Max	Units
AUDIO PERFORMANCE			VIN = 10 V rms, RL = 10 kΩ, f = 1 kHz
Total Harmonic Distortion Plus Noise	THD+N				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			RL = 2 kΩ, CL = 200 pF				V/μs
Slew Rate	SR			6	10
Small Signal Bandwidth	BW–3 dB		RL = 2 kΩ, CL = 200 pF
			G = 1/2		7		MHz
			G = 2		3.5		MHz
INPUT
Input Offset Voltage	VIOS		VCM = 0 V, RTI, G = 2	–1.2	0.05	+1.2	mV
Common-Mode Rejection	CMR		VCM = ±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		VS = ±6 V to ±18 V	90	110		dB
Input Voltage Range	IVR		Common Mode		±15		V
			Differential		±28		V
OUTPUT			RL = 2 kΩ	±13	±14
Output Voltage Swing	VO						V
Minimum Resistive Load Drive					2		kΩ
Maximum Capacitive Load Drive					300		pF
Short Circuit Current Limit	ISC				+45, –20		mA
GAIN
Gain Accuracy				–0.1	0.03	0.1	%
REFERENCE INPUT							kΩ
Input Resistance					18
Voltage Range					±10		V
POWER SUPPLY				±6		±18
Supply Voltage Range	VS		VCM = 0 V, RL = ∞				V
Supply Current	ISY				±2.7	±4.0	mA

Specifications subject to change without notice.

ABSOLUTE MAXIMUM RATINGS	±18 V
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . .
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 (TJ) . . . . . . . . . . . . . .	. . . . . . +150°C
Lead Temperature (Soldering, 60 sec) . . . . . .	. . . . . . +300°C
Thermal Resistance
8-Pin Plastic DIP (P): θJA = 103, θJC = 43 .	. . . . . . . . °C/W

8-Pin SOIC (S): θJA = 150, θJC = 43. . . . . . . . . . . . . . °C/W

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.

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SSM2143

1 s

100

90

10

0%

50mV

100

90

10

0%

5V

5 s

Figure 1. Small-Signal Transient Response (VIN = ±200 mV, G = 1/2, RL = 2 kΩ, VS = ±15 V, TA = +25°C)

Figure 3. THD+N vs. Frequency (VS = ±15 V, VIN = 10 V rms, with 80 kHz Filter)

Figure 2. Large Signal Transient Response (VIN = +24 dBu, G = 1/2, RL = 2 kΩ VS = ±15 V, TA = +25°C)

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

Figure 5. Dynamic Intermodulation Distortion, DIM-100 (VS = ±15 V, RL = 100 kΩ)

1.0

0.1

%
–
THD+N	0.01
	0.001
0.0001
	100	1k	10k	100k

LOAD RESISTANCE – Ω

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

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