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STMicroelectronics TS921ID
- Part No.:
- TS921ID
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS921ID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,837
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Product details
Overview
TS921ID from STMicroelectronics is a rail-to-rail input/output single BiCMOS operational amplifier optimized for 3 V and 5 V battery-powered audio systems, delivering 80 mA output current into 32 Ω loads, 4 MHz gain-bandwidth product, 1 V/μs slew rate, and 9 nV/√Hz input voltage noise at 1 kHz.
For engineers reviewing the TS921ID datasheet, TS921ID pinout, TS921ID application, or TS921ID equivalent, this device is selected for low-noise, high-output-current analog signal conditioning in portable audio, piezoelectric drivers, and instrumentation where rail-to-rail swing and capacitive load stability up to 500 pF are required.
Technical Context
The TS921ID employs a BiCMOS input stage enabling rail-to-rail common-mode input range (VDD − 0.2 V to VCC + 0.2 V) and rail-to-rail output swing within 100 mV of supply rails under 32 Ω load. Its internal compensation ensures unity-gain stability with capacitive loads ≤500 pF.
It operates from 2.7 V to 12 V single supply (or ±1.35 V to ±6 V dual), exhibits 60–80 dB CMRR and SVRR across temperature, and maintains 3–5 mV input offset voltage over −40 °C to +125 °C with 2 μV/°C drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 12 V single supply - supports direct integration into 3 V and 5 V battery-powered systems without level-shifting. |
| Output Current | 80 mA continuous - drives low-impedance loads including 32 Ω headphones and piezoelectric actuators directly. |
| Gain-Bandwidth Product | 4 MHz - enables stable unity-gain buffer operation and bandwidth-critical audio line driving up to ~300 kHz. |
| Slew Rate | 1 V/μs typical - preserves transient fidelity in audio signals with fast edges and prevents slew-induced distortion. |
| Input Voltage Noise | 9 nV/√Hz at 1 kHz - minimizes audible hiss in preamplifier and sensor interface stages requiring low-noise amplification. |
| Input Offset Voltage | 3–5 mV max over full temperature range - ensures DC accuracy in precision gain stages without external trimming. |
| Capacitive Load Stability | Stable up to 500 pF - eliminates need for isolation resistors when driving long cables or ADC input capacitance. |
Pinout & Package
TS921ID is supplied in SO-8 (Small Outline Integrated Circuit, 8-pin) plastic micropackage per JEDEC MS-012, with standard 1.27 mm pitch, body dimensions 4.9 × 6.0 mm, and thermal resistance RthJA = 125 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Inverting Input (−) | Differential input node | Accepts feedback network connection; input bias current ≤100 nA minimizes resistor-generated offset error. |
| Non-inverting Input (+) | Differential input node | Accepts signal source or reference; rail-to-rail common-mode range allows direct connection to ground or supply-referenced sensors. |
| Output | Amplified signal source | Delivers up to 80 mA into 32 Ω; output swing reaches within 100 mV of VCC and VDD (GND) under load. |
| VCC | Positive supply terminal | Accepts 2.7–12 V; internal ESD protection rated to 1.5 kV HBM ensures robustness during board handling and system integration. |
| VDD | Negative supply / ground terminal | Connected to GND in single-supply mode; supports true dual-supply operation down to ±1.35 V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in low-voltage systems (e.g., 3 V supply yields >2.9 Vpp output swing into 600 Ω). |
| High output current | 80 mA drive capability eliminates external boost stages for 32 Ω headphone and piezo driver applications. |
| Low input voltage noise | 9 nV/√Hz at 1 kHz reduces audible noise floor in microphone preamps and sensor front-ends. |
| Capacitive load stability | Guaranteed stability with up to 500 pF load avoids oscillation when interfacing with ADCs or long PCB traces. |
| Wide supply range | 2.7–12 V operation supports both coin-cell-powered wearables and industrial 12 V signal chains without redesign. |
Applications
| Headphone Amplifier | Piezoelectric Speaker Driver |
|---|---|
Use Scenario: Driving stereo 32 Ω dynamic headphones from a 3.3 V microcontroller DAC output in portable media players. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail output buffer with low THD (0.005 %) and high current delivery. Use Value: Eliminates coupling capacitors and external gain stages, reducing BOM count and PCB area while preserving audio fidelity. |
Use Scenario: Generating high-slew-rate drive signals for ultrasonic piezoelectric transducers in proximity sensors or haptic feedback modules. IC Role / Device Role / Timing Role: High-speed, high-current voltage amplifier with 1 V/μs slew rate and 4 MHz bandwidth. Use Value: Delivers clean, undistorted excitation pulses up to 200 kHz without phase lag or ringing due to capacitive load instability. |
| Portable Instrumentation Front-End | Line Driver for Audio Interfaces |
Use Scenario: Amplifying low-level thermocouple or strain gauge signals in handheld test equipment powered by two AA batteries (3 V). IC Role / Device Role / Timing Role: Low-noise (9 nV/√Hz), low-offset (3–5 mV), rail-to-rail input op-amp in non-inverting configuration. Use Value: Maximizes SNR and DC accuracy without external offset nulling or power-hungry precision op-amps. |
Use Scenario: Buffering and impedance-matching analog audio outputs (e.g., from CODECs) to 600 Ω professional audio lines. IC Role / Device Role / Timing Role: Unity-gain stable, low-distortion (0.005 % THD), high-output-current line driver. Use Value: Maintains signal integrity over long cables with minimal crosstalk and no need for discrete emitter followers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail, high-output-current op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L2CD | Lower supply current (120 µA vs. 1.5 mA), lower output current (10 mA), slower GBW (850 kHz), higher Vio (10 mV typ). | Targeted at ultra-low-power sensor interfaces-not suitable for 32 Ω headphone or piezo drive. | Select only when quiescent current <200 µA is mandatory and output load >10 kΩ. |
| OPA365AIDBVR | Higher GBW (50 MHz), faster slew rate (25 V/μs), lower noise (4.5 nV/√Hz), but limited output current (65 mA into 100 Ω, not 32 Ω). | Optimized for high-frequency signal chain buffering-not validated for sustained 32 Ω drive at audio frequencies. | Prefer for wideband active filters or ADC drivers; avoid for sustained low-Z audio loads. |
Compared with TLC27L2CD and OPA365AIDBVR, TS921ID uniquely balances 80 mA 32 Ω drive, 4 MHz bandwidth, rail-to-rail I/O, and 9 nV/√Hz noise-making it the only option qualified for battery-powered headphone amplifiers and piezoelectric actuator drivers without external support circuitry.
Availability
TS921ID is available at Aetrix Electronics and suitable for portable audio systems, piezoelectric actuator control, and low-noise instrumentation requiring stable component supply across extended temperature ranges (−40 °C to +125 °C).
Supply support for TS921ID 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The TS921 belongs to ST's precision rail-to-rail op-amp product line, engineered specifically for low-voltage, high-fidelity analog signal conditioning in battery-constrained audio and sensing applications.
FAQ
Is TS921ID stable driving 500 pF capacitive loads?
Yes. The TS921ID is explicitly characterized and guaranteed stable with capacitive loads up to 500 pF, as confirmed in the datasheet's Phase Margin (68°) and Gain Margin (12 dB) measurements under RL = 600 Ω and CL = 100 pF, and verified via open-loop gain/phase plots up to 100 MHz. No external compensation is required.
What is the maximum safe continuous output current into 32 Ω at 5 V supply?
The TS921ID delivers 80 mA continuous output current into 32 Ω loads at 5 V supply, as specified in Table 4 (Io = 50–80 mA) and confirmed by Figure 1 and Figure 3 (output short-circuit current vs. output voltage). Thermal limits remain within safe junction temperature (Tj ≤ 150 °C) with SO-8 package RthJA = 125 °C/W at ambient ≤ 70 °C.
Does TS921ID support true single-supply operation with input referenced to ground?
Yes. The TS921ID features rail-to-rail input common-mode range extending from VDD − 0.2 V to VCC + 0.2 V. With VDD = GND and VCC = 3.3 V, the input accepts signals from 0 V to 3.5 V - enabling direct ground-referenced sensor or DAC interfacing without level-shifting circuitry.
How does TS921ID's 9 nV/√Hz noise compare to typical audio op-amps?
At 9 nV/√Hz (1 kHz), TS921ID matches low-noise audio op-amps like NE5532 (5 nV/√Hz) and exceeds general-purpose devices like LM358 (40 nV/√Hz). Its noise performance is sufficient for line-level and headphone amplification where THD remains ≤0.005 %, making it suitable for high-fidelity portable audio without requiring ultra-low-noise (≤5 nV/√Hz) specialty parts.
TS921ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.3V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 1mA
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TS921ID FAQ
1.How can I place an order for TS921ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TS921ID 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 TS921ID reliable?
The price and inventory of TS921ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS921ID is usually 5 days.
3.What payment methods are accepted for TS921ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS921ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS921ID?
TS921ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS921ID 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 TS921ID?
For technical support, including TS921ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS921ID requirements.
6.How does Aetrix verify that TS921ID is sourced from the original manufacturer or authorized distributors?
All TS921ID 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 TS921ID meets industry standards.
7.What is the process for return or replacement of TS921ID?
All TS921ID units undergo pre-shipment inspection (PSI). If there is an issue with TS921ID, 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 TS921ID part is unused and in its original packaging.
Return procedure for TS921ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS921ID Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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