Analog Devices SSM2412S, SSM2412P, SSM2402S, SSM2402P Datasheet

a		Dual Audio
		Analog Switches
		SSM2402/SSM2412

FEATURES

“Clickless” Bilateral Audio Switching Guaranteed “Break-Before-Make” Switching Low Distortion: 0.003% typ

Low Noise: 1 nV/ÖHz

Superb OFF-Isolation: 120 dB typ Low ON-Resistance: 60 V typ

Wide Signal Range: VS = 618 V; 10 V rms Wide Power Supply Range: 620 V max

Available in Dice Form

GENERAL DESCRIPTION

The SSM2402/SSM2412 are dual analog switches designed specifically for high performance audio applications. Distortion and noise are negligible over the full audio operating range of 20 Hz to 20 kHz at signal levels of up to 10 V rms. The SSM2402/ SSM2412 offer a monolithic integrated alternative to expensive and noisy relays or complex discrete JFET circuits. Unlike conventional general-purpose CMOS switches, the SSM2402/SSM2412 provide superb fidelity without audio “clicks” during switching.

Conventional TTL or CMOS logic can be used to control the switch state. No external pull-up resistors are needed. A “T” configuration provides superb OFF-isolation and true bilateral operation. The analog inputs and outputs are protected against overload and overvoltage.

An important feature is the guaranteed “break-before-make” for all units, even IC-to-IC. In large systems with multiple switching channels, all separate switching units must open before any switch goes into the ON-state. With the SSM2402/ SSM2412, you can be certain that multiple circuits will all break-before-make.

The SSM2402/SSM2412 represent a significant step forward in audio switching technology. Distortion and switching noise are significantly reduced in the new SSM2402/SSM2412 bipolarJFET switches relative to CMOS switching technology. Based on a new circuit topology that optimizes audio performance, the SSM2402/SSM2412 make use of a proprietary bipolarJFET process with thin-film resistor network capability. Nitride capacitors, which are very area efficient, are used for the proprietary ramp generator that controls the switch resistance transition. Very wide bandwidth amplifiers control the gate-to-source voltage over the full audio operating range for each switch. The ON-resistance remains constant with changes in signal amplitude and frequency, thus distortion is very low, less than 0.01% max.

The SSM2402 is the first analog switch truly optimized for high-performance audio applications. For broadcasting and other switching applications which require a faster switching time, we recommend the SSM2412—a dual analog switch with one-third of the switching time of the SSM2402.

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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.

FUNCTIONAL BLOCK DIAGRAM

PIN CONNECTIONS

14-Pin Epoxy DIP

(P-Suffix)

16-Pin SOL

(S-Suffix)

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

SSM2402/SSM2412–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS (@ VS = 618 V, RL = OPEN, and –408C ≤ TA ≤ +858C unless otherwise noted.

All specifications, tables, graphs, and application data apply to both the SSM2402 and SSM2412, unless otherwise noted.)

				SSM2402/SSM2412
Parameter	Symbol	Conditions		Min Typ	Max	Units
POSITIVE SUPPLY CURRENT	+ISY	VIL = 0.8 V, 2.0 V1		6.0	7.5	mA
NEGATIVE SUPPLY CURRENT	–ISY	VIL = 0.8 V, 2.0 V1		4.8	6.0	mA
GROUND CURRENT	IGND	VIL = 0.8 V, 2.0 V1		0.6	1.5	mA
DIGITAL INPUT HIGH	VINH	TA = Full Temperature Range		20		V
DIGITAL INPUT LOW	VINL	TA = Full Temperature Range			0.8	V
LOGIC INPUT CURRENT	ILOGIC	VIN = 0 V to 15 V2		1.0	5.0	mA
ANALOG VOLTAGE RANGE3	VANALOG			–14.2	+14.2	V
ANALOG CURRENT RANGE3	IANALOG			–10	+10	mA
OVERVOLTAGE INPUT CURRENT		VIN = ±VSUPPLY		±40		mA
SWITCH ON RESISTANCE	RON	–14.2 V £ VA £ +14.2 V
		IA = ±10 mA, VIL = 2.0 V
		TA = +25°C		60	85	W
		TA = Full Temperature Range			115	W
		Tempco (DRON/DT)		0.2		W/°C
RON MATCH	RON MATCH	–14.2 V £ VA £ +14.2 V		1	5	%
		IA = ±10 mA, VIL = 2.0 V
SWITCH ON LEAKAGE CURRENT	IS(ON)	VIL = 2.0 V
		–14.2 V £ VA £ +14.2 V		0.05	1.0	mA
		VA = 0 V		0.05	10.0	nA
SWITCH OFF LEAKAGE CURRENT	IS(OFF)	VIL = 0.8 V
		–14.2 V £ VA £ +14.2 V		0.05	1.0	mA
		VA = 0 V		0.05	10.0	nA
TURN-ON TIME4	tON	VA = +10 V, RL = 2 kW	SSM2402	10.0		ms
		TA = +25°C, See Test Circuit	SSM2412	3.5
TURN-OFF TIME5	tOFF	VA = +10 V, RL = 2 kW	SSM2402	4.0		ms
		TA = +25°C, See Test Circuit	SSM2412	1.5
BREAK-BEFORE-MAKE	tOFF–tON	TA = +25°C	SSM2402	6.0		ms
TIME DELAY6			SSM2412	2.0
CHARGE INJECTION	Q	TA = +25°C	SSM2402	50		pC
			SSM2412	150
ON-STATE INPUT	CS(ON)	VA = 1 V rms		12		pF
CAPACITANCE		f = 5 kHz, TA = +25°C
OFF-STATE INPUT	CS(OFF)	VA = 1 V rms		4		pF
CAPACITANCE		f = 5 kHz, TA = +25°C
OFF ISOLATION	ISO(OFF)	VA = 10 V rms, 20 Hz to 20 kHz		120		dB
		TA = +25°C, See Test Circuit
CHANNEL-TO-CHANNEL	CT	VA = 10 V rms, 20 Hz to 20 kHz		96		dB
CROSSTALK		TA = +25°C
TOTAL HARMONIC	THD	0 V to 10 V rms, 20 Hz to 20 kHz		0.003	0.01	%
DISTORTION7		TA = +25°C, RL = 5 kW
SPECTRAL NOISE DENSITY	en	20 Hz to 20 kHz, TA = +25°C		1		nV/Ö
							Hz
WIDEBAND NOISE DENSITY	en p-p	20 Hz to 20 kHz, TA = +25°C		0.2		mV p-p

NOTES

1“VIL” is the Logic Control Input.

2Current tested at VIN = 0 V. This is the worst case condition. 3Guaranteed by RON test condition.

4Turn-ON time is measured from the time the logic input reaches the 50% point to the time the output reaches 50% of the final value. 5Turn-OFF time is measured from the time the logic input reaches the 50% point to the time the output reaches 50% of the initial value. 6Switch is guaranteed by design to provide break-before-make operation.

7THD guaranteed by design and dynamic RON testing. Specifications subject to change without notice.

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SSM2402/SSM2412

ABSOLUTE MAXIMUM RATINGS				–40°C to +85°C
Operating Temperature Range . . . . . .			.
Operating Supply Voltage Range . . . .			.	. . . . . . . . . .	. . ±20 V
Analog Input Voltage Range		V– +3.5 V ≤ VA ≤ V+ –3.5 V
Continuous . . . . . . . . . .
Maximum Current Through Switch .			.	. . . . . . . . . .	. . 20 mA
Logic Input Voltage Range		. . . . . . . .	.	. . . V+ Supply to –2 V
V+ Supply to Ground . . . .		. . . . . . . .	.	. . . . . . . . . .	. . . +36 V
V– Supply to Ground . . . . . .		. . . . . . .	.	. . . . . . . . . .	. . . –20 V
VA to V– Supply . . . . . . . . . .		. . . . . . .	.	. . . . . . . . . .	. . +36 V
Package Type		uJA*		uJC	Units
14-Pin Plastic DIP (P)		76		33	°C/W
16-Pin SOL (S)		92		27	°C/W

ORDERING GUIDE

	Temperature	Package
Model	Range	Description
SSM2402P	–40°C to +85°C	14-Pin Plastic DIP
SSM2402S	–40°C to +85°C	16-Pin SOL
SSM2412P	–40°C to +85°C	14-Pin Plastic DIP
SSM2412S	–40°C to +85°C	16-Pin SOL

DICE CHARACTERISTICS

Die Size 0.105 × 0.097 Inch, 10,185 sq. mils (2.667 × 2.464 mm, 6.57 sq. mm)

*θJA is specified for worst case mounting conditions, i.e., θJA is specified for device in socket for P-DIP package; θJA is specified for device soldered to printed circuit board for SOL package.

Timing Diagram

WAFER TEST LIMITS

Parameter	Symbol	Conditions1	Limit	Units
POSITIVE SUPPLY CURRENT	+ISY	VIL = 0.8 V	7.5	mA max
NEGATIVE SUPPLY CURRENT	–ISY	VIL = 0.8 V	6.0	mA max
GROUND CURRENT	IGND	VIL = 0.8 V	1.5	mA max
LOGIC INPUT CURRENT	ILOGIC	VIN = 0 V2	5.0	μA max
SWITCH ON RESISTANCE	RON	–14.2 V ≤ VA ≤ +14.2 V	85	Ω max
		IA = ±10 mA, VIL = 2.0 V
RON MATCH BETWEEN SWITCHES	RON MATCH	–14.2 V ≤ VA ≤ +14.2 V	5	% max
		IA = ±10 mA, VIL = 2.0 V
SWITCH ON LEAKAGE CURRENT	IS(ON)	–14.2 V ≤ VA ≤ +14.2 V, VIL = 2.0 V	1.0	μA max
SWITCH OFF LEAKAGE CURRENT	IS(OFF)	–14.2 V ≤ VA ≤ +14.2 V, VIL = 0.8 V	1.0	μA max

NOTES

1VIL = Logic Control Input; VA = Applied Analog Input Voltage; IA = Applied Analog Input Current. 2Worst Case Condition.

Electrical tests are performed at wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed for standard product dice. Consult factory to negotiate specifications based on dice lot qualifications through sample lot assembly and testing.

REV. A

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SSM2402/SSM2412–Typical Performance Characteristics

Total Harmonic Distortion vs.	“OFF” Isolation vs. Frequency	“ON” Resistance vs. Analog Voltage
Frequency

SSM2402 Switching Time	SSM2412 Switching Time	Channel Separation vs. Frequency
vs. Temperature	vs. Temperature

Supply Current vs. Temperature

Overvoltage Characteristics

Leakage Current vs. Analog Voltage

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REV. A