Analog Devices Inc. SSM2135S-REEL7

Overview

SSM2135S-REEL7 from Analog Devices is a dual, single-supply audio operational amplifier optimized for low-noise, low-distortion signal conditioning in portable and multimedia audio systems. It delivers 5.2 nV/√Hz input voltage noise, 0.003% THD+N at 1 kHz (1 V p-p), 3.5 MHz gain bandwidth, rail-to-rail output swing capability under moderate loads, and operates from 4 V to 36 V single supply. It serves as a stereo headphone driver, microphone preamplifier, and balanced line receiver in 5 V audio subsystems.

For engineers reviewing the SSM2135S-REEL7 datasheet, SSM2135S-REEL7 pinout, SSM2135S-REEL7 application, or SSM2135S-REEL7 equivalent, key selection criteria include verified input noise density, distortion performance into 32 Ω loads, unity-gain stability with capacitive drive up to 500 pF, common-mode input range (0 V to 4.0 V at 5 V supply), and guaranteed operation over −40°C to +85°C.

Technical Context

The SSM2135S-REEL7 integrates two independent, unity-gain stable op-amps in a single SOIC-8 package, each featuring a proprietary output stage enabling near-rail output swing (e.g., 4.1 V high / 3.5 mV low at RL = 100 kΩ with 5 V supply) while maintaining ultralow distortion even into 32 Ω loads. Its input stage supports true single-supply operation with common-mode range extending to ground and rail.

It exhibits 121 dBu SNR (20 Hz–20 kHz), 87–112 dB CMRR (dc), 90–120 dB PSRR (dc), and 0.6–0.9 V/μs slew rate - characteristics validated across −40°C to +85°C and confirmed for both channels in dual configuration without crosstalk degradation (−105 dB at 1 kHz).

Key Specifications

Pinout & Package

SSM2135S-REEL7 is housed in an 8-lead narrow-body SOIC (SOIC_N, R-8 package), compliant with JEDEC MS-012-AA, with 1.27 mm lead pitch and specified thermal resistance θJA = 158°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual audio op-amp applications.

Compared with OPA2134PA and LM4562MAX, the SSM2135S-REEL7 uniquely combines verified 5.2 nV/√Hz noise, rail-swing output, and guaranteed −40°C to +85°C operation on 5 V single supply - making it irreplaceable in space-constrained, low-voltage stereo audio signal chains.

Availability

SSM2135S-REEL7 is available at Aetrix Electronics and suitable for multimedia audio systems, microphone preamplifiers, and headphone driver circuits requiring stable component supply across industrial temperature ranges and volume production cycles.

Supply support for SSM2135S-REEL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and audio markets since 1965.

The SSM2135S-REEL7 belongs to Analog Devices' SSM audio amplifier family, engineered specifically for low-voltage, low-noise signal conditioning in portable and PC-based audio subsystems - emphasizing sonic fidelity, rail-to-rail operation, and single-supply simplicity.

FAQ

What is the maximum load drive capability of the SSM2135S-REEL7 at 5 V supply?

The SSM2135S-REEL7 delivers 3.9 V high / 3.0 mV low output swing into 600 Ω at 5 V supply, with short-circuit current limit of ±30 mA per amplifier. It maintains 0.005% THD+N into 32 Ω loads, confirming suitability for stereo headphone drivers without external boost circuitry. This performance is validated across −40°C to +85°C per the Rev. G datasheet.

Does the SSM2135S-REEL7 support true single-supply operation with input signals referenced to ground?

Yes, the SSM2135S-REEL7 supports true single-supply operation: its input common-mode range extends from 0 V to 4.0 V at 5 V supply, allowing direct connection of ground-referenced AC signals when biased at mid-supply (e.g., 2.0–2.5 V). This eliminates level-shifting components in microphone preamp and ADC buffer designs, as confirmed in Applications Information Section (Rev. G, Page 10).

Is the SSM2135S-REEL7 unity-gain stable when driving capacitive loads?

Yes, the SSM2135S-REEL7 is unity-gain stable up to 500 pF capacitive load, as verified in Figure 20 (Small Signal Overshoot vs. Load Capacitance) and Applications Information (Rev. G, Page 10). No external compensation is required for driving typical ADC input capacitance or long cables, though overshoot increases slightly above 100 pF.

What is the guaranteed operating temperature range for the SSM2135S-REEL7?

The SSM2135S-REEL7 is guaranteed for operation from −40°C to +85°C, as stated in the Ordering Guide (Rev. G, Page 14) and Absolute Maximum Ratings (Page 4). This extended industrial temperature range is validated for all electrical specifications in Table 1, including noise, THD+N, and output swing, making it suitable for embedded audio in harsh environments.

Can the SSM2135S-REEL7 be used as a pseudoground generator, and what is its output current capability?

Yes, the SSM2135S-REEL7 can serve as a low-impedance pseudoground generator (Figure 37, Rev. G, Page 12). With a 5 V supply and 100 Ω series resistor, it sources or sinks up to 12 mA while maintaining stability via 0.1 μF feedback and 1 μF reservoir capacitance - sufficient for biasing dual op-amp stages or ADC/DAC references in single-supply audio systems.