SSM2135 Analog Devices, SSM2135 Datasheet

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SSM2135

Manufacturer Part Number
SSM2135
Description
Dual Single-Supply Audio Operational Amplifier
Manufacturer
Analog Devices
Datasheet

Specifications of SSM2135

-3db Bandwidth
3.5MHz
Slew Rate
600mV/µs
Vos
200µV
Ib
300nA
# Opamps Per Pkg
2
Input Noise (nv/rthz)
5.2nV/rtHz
Vcc-vee
4V to 36V
Isy Per Amplifier
3.8mA
Packages
SOIC

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Price
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SSM2135
Manufacturer:
AD
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115
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ESS
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660
Part Number:
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AD
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5 510
Part Number:
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a
REV. D
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.
GENERAL DESCRIPTION
The 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
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
18 V. The unity gain stable device has very low voltage noise
FEATURES
Excellent Sonic Characteristics
High Output Drive Capability
5.2 nV/ Hz Equivalent Input Noise @ 1 kHz
0.001% THD+N (V
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
+IN
–IN
O
= 2.5 V p-p @ 1 kHz)
9V 9V
FUNCTIONAL BLOCK DIAGRAM
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
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.
8-Lead Narrow-Body SOIC
V–/GND
OUT A
–IN A
+IN A
Audio Operational Amplifier
(S Suffix)
SSM2135
PIN CONNECTIONS
OUT B
–IN B
+IN B
V+
Dual Single-Supply
V–/GND
OUT A
–IN A
+IN A
V+
OUT
V–/GND
8-Lead Epoxy DIP
1
2
3
4
SSM2135
(P-Suffix)
SSM2135
Fax: 617/326-8703
6
5
8
7
V+
OUT B
–IN B
+IN B

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SSM2135 Summary of contents

Page 1

... 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 – +85 C. ...

Page 2

... Plastic DIP S 8-Lead SOIC 1 is specified for worst case conditions, i.e., JA socket for P-DIP and device soldered in circuit board for SOIC package. Temperature Model Range SSM2135P – +85 C SSM2135S – +85 C –2– Min Typ Max Units 5.2 nV/ Hz 0.5 pA/ Hz 121 ...

Page 3

... V p-p, with 80 kHz Low-Pass Filter REV 0.1 0.01 0.001 10 Figure 4. THD+N vs. Load (See Test Circuit) 1 0.1 = +1, V 0.01 0.001 0 1 0.1 0.01 0.001 Figure 6. THD+N vs. Supply Voltage –3– SSM2135 +1, = 1kHz 1Vp 10k L WITH 80kHz FILTER 100 1k LOAD RESISTANCE – + 100k L NONINVERTING ...

Page 4

... SSM2135 Figure 7. SMPTE Intermodulation Distortion ( kHz 100 Figure 8. Input Voltage Noise (20 nV/div FREQUENCY – Hz Figure 9. Voltage Noise Density vs. Frequency +1, Figure 10. Current Noise Density vs. Frequency V 1s Figure 11. Frequency Response ( 100 1k Figure 12. Square Wave Response ( –4– + + 100 FREQUENCY – + 100 500m +1, V REV. D ...

Page 5

... Figure 16. Closed-Loop Gain vs. Frequency L 100 –20 100k 1M 1k Figure 17. Open-Loop Gain and Phase vs. Frequency + + +PSRR 100k 1M Figure 18. Small Signal Overshoot vs. Load Capacitance –5– SSM2135 +100 + 10k 100k 1M FREQUENCY – + + GAIN PHASE 10k 100k 1M FREQUENCY – + 100mVp– + NEGATIVE EDGE ...

Page 6

... SSM2135 + + +100 VCL 100 1k 10k FREQUENCY – Hz Figure 19. Output Impedance vs. Frequency + + 1kHz THD 100 1k LOAD RESISTANCE – Figure 20. Maximum Output Voltage vs. Load Resistance 10k 100k FREQUENCY – Hz Figure 21. Maximum Output Swing vs. Frequency +10 VCL VCL 0 0 100k 1M Figure 22. Output Swing vs. Supply Voltage 5 ...

Page 7

... Because of this, signal dynamic range can be optimized if the amplifier is biased reference rather than at half the supply voltage. The SSM2135 is unity-gain stable, even when driving into a fair amount of capacitive load. Driving up to 500 pF does not cause any instability in the amplifier. However, overshoot in the frequency response increases slightly ...

Page 8

... Figure 29 shows the SSM2135 used in a stereo headphone driver for multimedia applications with the AD1848, a 16-bit stereo codec. The SSM2135 is equally well suited for the serial- bused AD1849 stereo codec. The headphone’s impedance can be as low which covers most commercially available high fidelity headphones ...

Page 9

... An 18-Bit Stereo CD-DAC Output Amplifier The SSM2135 makes an ideal single supply stereo output amplifier for audio D/A converters because of its low noise and distortion. Figure 33 shows the implementation of an 18-bit ste- reo DAC channel. The output amplifier also provides low-pass filtering for smoothing the oversampled audio signal. The filter’s cutoff frequency is set at 22 ...

Page 10

... SSM2135 A Digital Volume Control Circuit Working in conjunction with the AD7528/PM7528 dual 8-bit D/A converter, the SSM2135 makes for an efficient audio attenuator, as shown in Figure 37. The circuit works off a single +5 V supply. The DAC’s are biased reference level which is sufficient to keep the DAC’s internal R-2R ladder switches operating properly. This voltage is also the optimal midpoint of the SSM2135’ ...

Page 11

... SPICE MACROMODEL * SSM2135 SPICE Macro-Model 9/92, Rev JCB/ADI *Copyright 1993 by Analog Devices, Inc. * *Node Assignments * * Noninverting Input * Inverting Input * Positive Supply * Negative Supply * .SUBCKT SSM2135 INPUT STAGE 1.5E3 1.5E3 5.311E– 106E–6 IOS 2 3 25E–09 EOS 12 5 POLY( 25E–06 1 ...

Page 12

... SSM2135 0.2440 (6.20) 0.2284 (5.80) 0.0098 (0.25) 0.0040 (0.10) 0.0500 (1.27) BSC OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Lead Plastic DIP (N- 0.280 (7.11) 0.240 (6.10 0.070 (1.77) 0.045 (1.15) 0.430 (10.92) 0.325 (8.25) 0.348 (8.84) 0.300 (7.62) 0.015 0.210 (0.381) TYP (5 ...

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