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SSM2135P-SSM2135S
Dual Single-Supply Audio Operational Amplifier
PIN CONNECTIONSREV.D
Dual Single-Supply
Audio Operational Amplifier
FEATURES
Excellent Sonic Characteristics
High Output Drive Capability
5.2 nV/√Hz Equivalent Input Noise @ 1 kHz
0.001% THD+N (VO = 2.5 V p-p @ 1 kHz)
3.5 MHz Gain Bandwidth
Unity-Gain Stable
Low Cost
APPLICATIONS
Multimedia Audio Systems
Microphone Preamplifier
Headphone Driver
Differential Line Receiver
Balanced Line Driver
Audio ADC Input Buffer
Audio DAC l-V Converter and Filter
Pseudo-Ground Generator
GENERAL DESCRIPTIONThe SSM2135 Dual Audio Operational Amplifier permits
excellent performance in portable or low power audio systems,
with an operating supply range of +4 V to +36 V or ±2 V to
±18 V. The unity gain stable device has very low voltage noise
of 4.7 nV/√Hz, and total harmonic distortion plus noise below
0.01% over normal signal levels and loads. Such characteristics
are enhanced by wide output swing and load drive capability. A
unique output stage* permits output swing approaching the rail
under moderate load conditions. Under severe loading, the
SSM2135 still maintains a wide output swing with ultralow
distortion.
Particularly well suited for computer audio systems and
portable digital audio units, the SSM2135 can perform
preamplification, headphone and speaker driving, and balanced
line driving and receiving. Additionally, the device is ideal for
input signal conditioning in single-supply sigma-delta analog-
to-digital converter subsystems such as the AD1878/AD1879.
The SSM2135 is available in 8-lead plastic DIP and SOIC
packages, and is guaranteed for operation over the extended
industrial temperature range of –40°C to +85°C.
*Protected by U. S. Patent No. 5,146,181.
(S Suffix)(P-Suffix)
8-Lead Narrow-Body SOIC8-Lead Epoxy DIP
FUNCTIONAL BLOCK DIAGRAM
+IN
–IN
SSM2135–SPECIFICATIONS
(VS = +5 V, –408C < TA < +858C unless otherwise noted.
Typical specifications apply at TA = +258C.)
ABSOLUTE MAXIMUM RATINGSSupply Voltage
Single Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+36 V
Dual Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±18 V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±VS
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . .10 V
Output Short Circuit Duration . . . . . . . . . . . . . . . .Indefinite
Storage Temperature Range . . . . . . . . . . . .–65°C to +150°C
Operating Temperature Range . . . . . . . . . . .–40°C to +85°C
Junction Temperature Range (TJ) . . . . . . . .–65°C to +150°C
Lead Temperature (Soldering, 60 sec) . . . . . . . . . . . .+300°C
ESD RATINGS883 (Human Body) Model . . . . . . . . . . . . . . . . . . . . . . .1 kV
EIAJ Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175 V
THERMAL CHARACTERISTICSThermal Resistance1
8-Lead Plastic DIPθJA103°C/W
θJC43°C/W
8-Lead SOICθJA158°C/W
θJC43°C/WθJA is specified for worst case conditions, i.e., θJA is specified for device in
socket for P-DIP and device soldered in circuit board for SOIC package.
ORDERING GUIDE
+2.5VdcFigure 1.Test Circuit for Figures 2–4
Figure 2.THD+N vs. Amplitude (See Test Circuit; AV = +1,
VS = +5 V, f = 1 kHz, with 80 kHz Low-Pass Filter)
Figure 3.THD+N vs. Frequency (See Test Circuit;
AV = +1, VIN = 1 V p-p, with 80 kHz Low-Pass Filter)
SSM2135Figure 7.SMPTE Intermodulation Distortion (AV = +1,
VS = +5 V, f = 1 kHz, RL = 10 kΩ)
Figure 8.Input Voltage Noise (20 nV/div)
1101k100
FREQUENCY – Hz
– nV/Figure 9.Voltage Noise Density vs. Frequency
1101k100
FREQUENCY – Hz
– pA/Figure 10.Current Noise Density vs. Frequency
Figure 11.Frequency Response (AV = +1, VS = +5 V,
VIN = 1 V p-p, RL = 10 kΩ)
Figure 12.Square Wave Response (VS = +5 V, AV = +1,
RL = ∞)
10010M1M100k10k1kFREQUENCY – Hz
CHANNEL SEPARATION – dBFigure 13.Crosstalk vs. Frequency (RL = 10 kΩ)
1001M100k10k100
FREQUENCY – Hz
COMMON-MODE REJECTION – dBFigure 14.Common-Mode Rejection vs. Frequency
–201001M100k10k1k
FREQUENCY – Hz
PSRR – dBFigure 15.Power Supply Rejection vs. Frequency
Figure 18.
SSM2135
FREQUENCY – Hz1001M100k10k1k
IMPEDANCE – Figure 19.Output Impedance vs. Frequency
10100k10k1k100
LOAD RESISTANCE – W
MAXIMUM OUTPUT – VoltsFigure 20.Maximum Output Voltage vs. Load Resistance
10k10M1M100k1k
FREQUENCY – Hz
MAXIMUM OUTPUT SWING – VoltsFigure 21.Maximum Output Swing vs. Frequency
40353025201510
SUPPLY VOLTAGE – Volts
OUTPUT VOLTAGE – VoltsFigure 22.Output Swing vs. Supply Voltage
TEMPERATURE – °C
POSITIVE OUTPUT SWING – Volts
NEGATIVE OUTPUT SWING – Volts
–75Figure 23.Output Swing vs. Temperature and Load
TEMPERATURE – °C
SLEW RATE – V/
–75Figure 24.Slew Rate vs. Temperature
