SSM2404_15 Datasheet, PDF (1/8 Pages) Analog Devices – Quad Audio Switch

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FEATURES
“CIickless” Bilateral Audio Switching
Four SPST Switches in a 20-Pin Package
Ultralow THD+N: 0.0008% @ 1 kHz (2 V rms,
R_L = 100 k⍀)
Low Charge Injection: 35 pC typ
High OFF Isolation: –100 dB typ (R_L = 10 k⍀ @ 1 kHz)
Low Crosstalk: –94 dB typ (R_L = 10 k⍀ @ 1 kHz)
Low ON Resistance: 28 ⍀ typ
Low Supply Current: 900 ␮A typ
Single or Dual Supply Operation: +11 V to +24 V or
؎5.5 V to ؎12 V
Guaranteed Break-Before-Make
TTL and CMOS Compatible Logic Inputs
Low Cost-Per-Switch
Quad Audio Switch
SSM2404
BLOCK DIAGRAM OF ONE SWITCH CHANNEL
CONTROL
LOGIC INTERFACE
AND
BREAK-BEFORE-MAKE
CONTROL
V–
RAMP
GENERATOR
DIGITAL
CONTROL
V+
PIN CONNECTIONS
Epoxy Mini-DIP (P Suffix)
and SOIC (S Suffix)
SW1 A
SW1 B
GENERAL DESCRIPTION
The SSM2404 integrates four SPST analog switches in a single
20-pin package. Developed specifically for high performance
audio applications, distortion and noise are negligible over the
full operating range of 20 Hz to 20 kHz. With very low charge
injection of 35 pC, “clickless” audio switching is possible, even
under the most demanding conditions.
Switch control is realized by conventional TTL or CMOS
logic. Guaranteed “break-before-make” operation assures that
all switches in a large system will open before any switch
reaches the ON state.
Single or dual supply operation is possible. Additional features
include –100 dB OFF isolation, –94 dB crosstalk and 28 Ω ON
resistance. Optional current-mode switching permits an
extended signal-handling range. Although optimized for large
load impedances, the SSM2404 maintains good audio
performance even under low load impedance conditions.
SW1 A 1
20 SW4 A
AGND
2
SW1
SW1
SW1 B 3
SW4 19 AGND
18 SW4 B
DGND 4
SW1 CONTROL 5
SW2 CONTROL 6
O
TOP VIEW
(_SNo_St_Mto₂S₄c₀al₄e)
17 V+
16 SW4 CONTROL
15 SW3 CONTROL
NC* 7
14 V–
SW2 B 8
13 SW3 B
AGND 9 SW2
SW3 12 AGND
SW2 A 10
11 SW3 A
NC = NO CONNECT
*CONNECT TO ANALOG GROUND
FOR BEST NOISE ISOLATION
REV. B
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