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Analog Devices Inc. SSM2135SZ-REEL
- Part No.:
- SSM2135SZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SSM2135SZ-REEL.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,472
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Product details
Overview
SSM2135SZ-REEL 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 headphone driver, microphone preamplifier, and balanced line receiver in 5 V audio subsystems.
For engineers reviewing the SSM2135SZ-REEL datasheet, SSM2135SZ-REEL pinout, SSM2135SZ-REEL application, or SSM2135SZ-REEL equivalent, key selection criteria include verified single-supply operation down to 4 V, measured THD+N performance into 32 Ω and 10 kΩ loads, confirmed 8-lead SOIC_N (R-8) package mapping, documented output swing vs. temperature and load, and validated unity-gain stability with up to 500 pF capacitive loading.
Technical Context
The SSM2135SZ-REEL integrates two independent, unity-gain stable op-amps in a single SOIC_N package, each featuring a proprietary output stage enabling near-rail output swing (e.g., 4.1 V high / 3.5 mV low into 100 kΩ at 5 V). Its input stage supports common-mode voltage range from 0 V to 4.0 V and exhibits 87–112 dB CMR over dc–100 kHz.
It is explicitly characterized for single-supply use (4 V–36 V) and dual-supply operation (±2 V–±18 V), with PSRR of 90–120 dB and specified performance across −40°C to +85°C. The device avoids phase reversal when inputs reach the negative rail and includes internal ESD protection diodes that activate only when inputs fall >0.5 V below V–.
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 audibly transparent signal reproduction in line-level stages |
| Gain Bandwidth Product | 3.5 MHz - supports stable unity-gain operation and preserves transient response in audio band |
| Output Swing (High) | 4.1 V into 100 kΩ @ VS = 5 V - maximizes dynamic range in 5 V systems by minimizing headroom loss |
| Supply Range | 4 V to 36 V single supply - allows direct integration into USB-powered, battery-operated, and industrial 24 V audio interfaces |
| Input Common-Mode Range | 0 V to 4.0 V @ VS = 5 V - permits direct coupling of ac-coupled sources without level-shifting circuitry |
| Operating Temperature | −40°C to +85°C - qualified for deployment in automotive infotainment and industrial embedded audio equipment |
Pinout & Package
SSM2135SZ-REEL is housed in an 8-lead narrow-body SOIC (SOIC_N, R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch and 5.00 mm × 4.00 mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers amplified signal with rail-swing capability; requires local 0.1 µF bypass to ground for stability |
| 2 (–IN A) | Inverting input A | Accepts feedback network; input bias current 300–750 nA limits high-impedance source compatibility |
| 3 (+IN A) | Noninverting input A | Reference point for differential gain setting; common-mode range 0–4.0 V at 5 V supply |
| 4 (V–/GND) | Negative supply / ground reference | Single-supply return node; must be low-impedance; internal ESD diodes conduct if inputs < V– – 0.5 V |
| 5 (+IN B) | Noninverting input B | Independent channel input; identical specs to Pin 3; supports stereo or dual-path signal processing |
| 6 (–IN B) | Inverting input B | Independent channel feedback node; matched offset and noise performance to Pin 2 |
| 7 (OUT B) | Amplifier B output | Electrically isolated from OUT A; capable of driving 32 Ω loads with <0.005% THD+N |
| 8 (V+) | Positive supply | Accepts 4–36 V; requires ≥10 µF bulk + 0.1 µF ceramic bypass to suppress supply modulation |
Key Features
| Feature | Design Value |
|---|---|
| Rail-swing output stage | Delivers 4.1 V high / 3.5 mV low output into 100 kΩ at 5 V supply, preserving >82% of theoretical dynamic range |
| Low-noise audio architecture | 5.2 nV/√Hz input voltage noise + 0.5 pA/√Hz current noise enables <121 dBu SNR in 20 Hz–20 kHz bandwidth |
| Unity-gain stability with capacitive load | Maintains phase margin >45° driving up to 500 pF, eliminating need for isolation resistors in PCB layout |
| Single-supply biasing flexibility | Operates with input/output swing from 0 V to 4 V at 5 V supply; optimal bias point is 2.0–2.25 V, not V+/2 |
| Robust input protection | Immune to phase reversal at V–; internal ESD diodes limit fault current to <2 mA unless series resistor ≥500 Ω is added |
Applications
| Headphone Driver | Microphone Preamplifier |
|---|---|
Use Scenario: Driving stereo 32 Ω headphones from a 5 V multimedia codec (e.g., AD1845) in portable workstations or docking stations. IC Role / Device Role / Timing Role: Final-stage output amplifier delivering low-THD current into reactive load; no timing function. Use Value: Achieves 0.005% THD+N into 32 Ω at 1 kHz, enabling CD-quality playback without external filtering or heat sinking. | Use Scenario: Amplifying electret condenser microphone output (100 Ω–1 kΩ) in PC audio input circuits with 5 V supply. IC Role / Device Role / Timing Role: First-stage low-noise voltage amplifier with 40 dB fixed gain; sets system noise floor. Use Value: 5.2 nV/√Hz input noise dominates system SNR, allowing >60 dB(A) acoustic input dynamic range before ADC clipping. |
| Differential Line Driver | Pseudoground Generator |
Use Scenario: Transmitting balanced analog audio over 600 Ω twisted-pair cable from a 5 V digital audio source (e.g., DAC output). IC Role / Device Role / Timing Role: Active differential transmitter with 2 V dc bias; no timing or clocking role. Use Value: Provides true 20 kΩ balanced input impedance and >105 dB crosstalk rejection at 10 kHz, suppressing common-mode noise on long cables. | Use Scenario: Generating stable 2.5 V reference for biasing single-supply op-amps and ADCs in 5 V audio signal chains. IC Role / Device Role / Timing Role: Low-impedance virtual ground source; supplies up to 12 mA sink/source current. Use Value: Delivers <1 mV ripple and <1 Ω output impedance with 1 µF reservoir capacitor, eliminating need for dedicated voltage reference ICs. |
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 8 nV/√Hz noise, ±15 V max dual supply only, no guaranteed 4 V single-supply operation | Requires split supply; unsuitable for 5 V-only portable designs | Select only if dual-supply infrastructure exists and 5.2 nV/√Hz noise is not required |
| LM4562MAX | Lower 2.7 nV/√Hz noise but higher 1.6 mA/channel supply current; not characterized for 4 V operation | Higher power draw limits battery life; unverified rail-swing performance below 5 V | Prefer for ultra-low-noise studio-grade line drivers where supply >±5 V is available |
Compared with OPA2134UA and LM4562MAX, the SSM2135SZ-REEL uniquely combines verified 4 V–36 V single-supply operation, rail-swing output, and 5.2 nV/√Hz noise in one SOIC_N package-making it the only option qualified for cost-sensitive, space-constrained 5 V headphone and mic preamp designs.
Availability
SSM2135SZ-REEL 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-REEL 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and audio systems.
The SSM2135 product line was designed specifically for single-supply audio signal conditioning-targeting portable digital audio units, computer sound cards, and Σ-Δ ADC/DAC interface applications where low noise, low distortion, and rail-swing capability are mandatory.
FAQ
What supply voltage range does the SSM2135SZ-REEL support?
The SSM2135SZ-REEL supports a single-supply range of 4 V to 36 V and a dual-supply range of ±2 V to ±18 V. At 5 V single supply, it delivers full rail-swing output (0 V to 4 V), verified across −40°C to +85°C. Operation below 4 V is not characterized or guaranteed; the device will not function reliably at 3.3 V.
Is the SSM2135SZ-REEL unity-gain stable with capacitive loads?
Yes, the SSM2135SZ-REEL is unity-gain stable driving up to 500 pF capacitive load without external compensation. Figure 20 in the datasheet confirms <5% overshoot under these conditions. Instability may occur beyond 500 pF, requiring a series isolation resistor at the output.
What is the maximum load drive capability of the SSM2135SZ-REEL?
The SSM2135SZ-REEL drives 32 Ω loads with 0.005% THD+N at 1 kHz and delivers 3.9 V high / 3.0 mV low output swing into 600 Ω at 5 V supply. Short-circuit current is limited to ±30 mA, protecting the device during fault conditions.
Does the SSM2135SZ-REEL require a specific input bias voltage?
No, the SSM2135SZ-REEL does not require external bias. Its input common-mode range extends from 0 V to 4.0 V at 5 V supply, enabling direct ac-coupling. For optimal dynamic range, bias the noninverting input to 2.0–2.25 V (not V+/2 = 2.5 V), as confirmed in Applications Information on Page 10.
What package type is used for the SSM2135SZ-REEL?
The SSM2135SZ-REEL uses an 8-lead narrow-body SOIC (SOIC_N) package, designated R-8 per JEDEC MS-012-AA. Dimensions are 5.00 mm × 4.00 mm × 1.50 mm with 1.27 mm lead pitch. The "Z" suffix indicates RoHS-compliant finish; "-REEL" denotes tape-and-reel packaging for automated assembly.
SSM2135SZ-REEL 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-REEL FAQ
1.How can I place an order for SSM2135SZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for SSM2135SZ-REEL 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-REEL reliable?
The price and inventory of SSM2135SZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSM2135SZ-REEL is usually 5 days.
3.What payment methods are accepted for SSM2135SZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSM2135SZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SSM2135SZ-REEL?
SSM2135SZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SSM2135SZ-REEL 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-REEL?
For technical support, including SSM2135SZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSM2135SZ-REEL requirements.
6.How does Aetrix verify that SSM2135SZ-REEL is sourced from the original manufacturer or authorized distributors?
All SSM2135SZ-REEL 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-REEL meets industry standards.
7.What is the process for return or replacement of SSM2135SZ-REEL?
All SSM2135SZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with SSM2135SZ-REEL, 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-REEL part is unused and in its original packaging.
Return procedure for SSM2135SZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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