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Analog Devices Inc. SSM2135SZ-REEL7
- Part No.:
- SSM2135SZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SSM2135SZ-REEL7.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,503
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Product details
Overview
SSM2135SZ-REEL7 from Analog Devices is a dual, single-supply audio operational amplifier in an 8-lead SOIC_N package, delivering 5.2 nV/√Hz input voltage noise, 0.003% THD+N at 1 kHz (1 V p-p), and 3.5 MHz gain bandwidth. It operates from 4 V to 36 V single supply or ±2 V to ±18 V dual supply, and is unity-gain stable with rail-to-rail output swing capability under moderate loads - ideal for headphone driver and microphone preamplifier circuits in portable audio systems.
For engineers reviewing the SSM2135SZ-REEL7 datasheet, SSM2135SZ-REEL7 pinout, SSM2135SZ-REEL7 application, or SSM2135SZ-REEL7 equivalent, key selection criteria include low-noise audio performance at 5 V operation, differential line driving/receiving capability, pseudoground generation functionality, and compatibility with Σ-Δ ADC input buffering in single-supply embedded audio subsystems.
Technical Context
The SSM2135SZ-REEL7 integrates two independent, unity-gain stable op-amps optimized for audio signal paths. Its input stage supports common-mode input range from 0 V to 4.0 V with 87–112 dB CMR, while the output stage delivers VOH = 3.9 V and VOL = 3.0 mV into 600 Ω at VS = 5 V - enabling full 0–4 V signal swing in single-supply 5 V systems.
It features internal protection against phase reversal when inputs go to the negative rail and tolerates up to 500 pF capacitive load without instability. The device maintains ultralow distortion (0.005% THD+N into 32 Ω) and high PSRR (90–120 dB) across dc to 100 kHz, supporting clean audio amplification in electrically noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 5.2 nV/√Hz @ 1 kHz - enables high-fidelity amplification of low-level microphone signals without degrading SNR |
| THD + N | 0.003% @ 1 V p-p, 1 kHz, RL = 10 kΩ - ensures transparent audio reproduction in line-level applications |
| Gain Bandwidth Product | 3.5 MHz - supports stable unity-gain operation and preserves wideband audio fidelity up to 20 kHz |
| Output Swing | 3.9 V high / 3.0 mV low into 600 Ω @ 5 V supply - delivers >3.8 Vpp dynamic range for 32 Ω headphone drive |
| Supply Range | 4 V to 36 V single supply - allows direct integration into 5 V USB-powered audio devices or 12–24 V industrial audio interfaces |
| Input Common-Mode Range | 0 V to 4.0 V @ VS = 5 V - permits biasing at 2.25 V reference for optimal headroom in single-supply ADC/DAC interfacing |
| PSRR | 90–120 dB @ dc - rejects power supply ripple in unregulated or shared-rail embedded systems |
Pinout & Package
SSM2135SZ-REEL7 is housed in an 8-lead narrow-body SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch and 4.9 mm × 3.9 mm body dimensions. Operating temperature range is −40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Amplifier A output | Delivers amplified signal with rail-swing capability; requires no level-shifting for 0–4 V single-supply DAC output buffering |
| –IN A (Pin 2) | Inverting input A | Accepts feedback network for gain-setting; supports differential configurations with matched resistor networks |
| +IN A (Pin 3) | Noninverting input A | Bias point for single-supply operation; typically tied to 2.25 V reference for maximum symmetrical swing |
| V–/GND (Pin 4) | Negative supply / ground reference | Serves as system ground return and negative rail; enables true single-supply operation with 0 V referenced inputs/outputs |
| +IN B (Pin 5) | Noninverting input B | Independent channel input; used in stereo headphone drivers or dual-mic preamp topologies |
| –IN B (Pin 6) | Inverting input B | Supports inverted gain stages or balanced line receiver configurations with precision resistor matching |
| OUT B (Pin 7) | Amplifier B output | Matches OUT A performance; enables simultaneous left/right channel processing in compact PCB layouts |
| V+ (Pin 8) | Positive supply | Accepts 4–36 V; bypassed with ≥10 µF capacitor to maintain PSRR and prevent supply-induced distortion |
Key Features
| Feature | Design Value |
|---|---|
| Rail-swing output stage | Delivers 3.9 V high / 3.0 mV low into 600 Ω at 5 V supply - maximizes usable dynamic range without external level-shifting circuitry |
| 5.2 nV/√Hz input voltage noise | Preserves signal integrity for electret microphone preamplification with >121 dBu SNR in 20 Hz–20 kHz bandwidth |
| Unity-gain stability into 500 pF | Eliminates need for external compensation in PCB traces or capacitive loads typical in headphone jack routing |
| Phase-reversal immunity | Prevents output inversion when inputs dip to V–, ensuring reliable behavior during hot-plug or transient events |
| Single-supply pseudoground generation | Configurable as low-impedance 2.5 V reference source (±12 mA drive) for biasing ADCs, DACs, and analog switches |
Applications
| Microphone Preamplifier | Headphone Driver |
|---|---|
Use Scenario: Amplifying low-output electret condenser microphone signals (10–20 mV rms) in USB audio interfaces or voice-recording peripherals. IC Role / Device Role / Timing Role: First-stage low-noise voltage amplifier with 40 dB fixed gain, biased at 2.25 V reference from codec VREF pin. Use Value: 5.2 nV/√Hz noise floor ensures >60 dB SNR even with 20 dB microphone gain, meeting professional voice capture requirements. |
Use Scenario: Driving 32 Ω stereo headphones directly from a 5 V microcontroller-based media player. IC Role / Device Role / Timing Role: Dual-channel output buffer with rail-swing capability, configured in noninverting mode with 2 V bias. Use Value: Delivers 0.8 V rms (1.13 V p-p) into 32 Ω at <0.005% THD+N, enabling loud, distortion-free playback without external boost converters. |
| Differential Line Driver | Pseudoground Generator |
Use Scenario: Transmitting balanced audio over 600 Ω twisted-pair cables in portable digital mixers or field recorders. IC Role / Device Role / Timing Role: Single-supply differential driver using one amplifier for signal inversion and biasing, second for active output stage. Use Value: Achieves >80 dB common-mode rejection with matched 20 kΩ input impedance, eliminating ground-loop hum in mobile setups. |
Use Scenario: Providing stable 2.5 V bias reference for single-supply SAR ADCs and analog switches in battery-powered IoT audio sensors. IC Role / Device Role / Timing Role: Unity-gain buffer with 1 µF charge reservoir output capacitor, sourcing/sinking up to 12 mA. Use Value: Maintains <10 mV droop under 10 mA step load, enabling accurate DC-coupled signal conditioning without LDO overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual audio op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2134UA | Higher supply current (8 mA vs. 6 mA typ), wider supply range (±4 V to ±18 V), no guaranteed 5 V operation | Optimized for high-end audio DAC output stages; lacks rail-swing output into low-Z loads | Preferred for dual-supply studio-grade line drivers where PSRR >130 dB is critical |
| LM4562MAX | Lower noise (2.7 nV/√Hz), higher GBW (55 MHz), but not unity-gain stable and requires ≥±5 V supply | Requires external compensation for unity-gain use; unsuitable for 5 V single-supply headphone drive | Best for high-fidelity line-level amplification in AC-powered equipment with regulated ±15 V rails |
Compared with OPA2134UA and LM4562MAX, the SSM2135SZ-REEL7 uniquely combines 5 V single-supply operation, rail-swing output into 32 Ω, and unity-gain stability - making it the only option among the three suitable for cost-sensitive, space-constrained portable audio designs requiring zero external bias components.
Availability
SSM2135SZ-REEL7 is available at Aetrix Electronics and suitable for multimedia audio systems, microphone preamplifiers, and headphone drivers requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for SSM2135SZ-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, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The SSM2135SZ-REEL7 belongs to Analog Devices' legacy audio amplifier product line, engineered specifically for low-voltage, low-noise signal conditioning in portable and PC-based audio subsystems - emphasizing sonic fidelity, supply flexibility, and ease of single-supply implementation.
FAQ
What is the operating supply voltage range for the SSM2135SZ-REEL7?
The SSM2135SZ-REEL7 operates from 4 V to 36 V on a single supply or ±2 V to ±18 V on dual supplies. At 5 V single supply, it delivers full 0–4 V input/output swing with 0.003% THD+N into 10 kΩ, making it ideal for USB-powered audio devices. Absolute maximum ratings cap at 36 V single supply or ±18 V dual supply.
Does the SSM2135SZ-REEL7 support rail-to-rail output swing?
The SSM2135SZ-REEL7 does not achieve true rail-to-rail output but delivers exceptional swing: VOH = 3.9 V and VOL = 3.0 mV into 600 Ω at VS = 5 V. This provides >3.8 Vpp usable range - sufficient for driving 32 Ω headphones and interfacing with 5 V ADCs/DACs without level-shifting circuitry.
Can the SSM2135SZ-REEL7 be used as a microphone preamplifier?
Yes - the SSM2135SZ-REEL7 is explicitly designed for microphone preamplification, with 5.2 nV/√Hz input voltage noise and 0.003% THD+N. In typical implementations, it's biased at 2.25 V (from codec VREF) and configured for 40 dB gain, achieving >60 dB SNR with electret microphones - as validated in Analog Devices' Figure 34 application circuit.
Is the SSM2135SZ-REEL7 unity-gain stable?
Yes, the SSM2135SZ-REEL7 is unity-gain stable and remains stable driving up to 500 pF capacitive load - a key advantage for headphone jack routing and PCB trace capacitance. No external compensation is required, simplifying layout in space-constrained portable designs.
What package type is used for the SSM2135SZ-REEL7?
The SSM2135SZ-REEL7 uses an 8-lead narrow-body SOIC_N (R-8) package compliant with JEDEC MS-012-AA, measuring 4.9 mm × 3.9 mm with 1.27 mm lead pitch. It is RoHS-compliant (indicated by the "Z" suffix) and rated for −40°C to +85°C operation.
SSM2135SZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.9V/µs
- Gain Bandwidth Product:
- 3.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 300 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 3.7mA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SSM2135SZ-REEL7 FAQ
1.How can I place an order for SSM2135SZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SSM2135SZ-REEL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SSM2135SZ-REEL7 reliable?
The price and inventory of SSM2135SZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSM2135SZ-REEL7 is usually 5 days.
3.What payment methods are accepted for SSM2135SZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSM2135SZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SSM2135SZ-REEL7?
SSM2135SZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SSM2135SZ-REEL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SSM2135SZ-REEL7?
For technical support, including SSM2135SZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSM2135SZ-REEL7 requirements.
6.How does Aetrix verify that SSM2135SZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All SSM2135SZ-REEL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SSM2135SZ-REEL7 meets industry standards.
7.What is the process for return or replacement of SSM2135SZ-REEL7?
All SSM2135SZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with SSM2135SZ-REEL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SSM2135SZ-REEL7 part is unused and in its original packaging.
Return procedure for SSM2135SZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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