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STMicroelectronics TSX921ILT
- Part No.:
- TSX921ILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TSX921ILT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:183
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Product details
Overview
TSX921ILT from STMicroelectronics is a rail-to-rail input/output single CMOS operational amplifier optimized for high-speed, low-distortion signal conditioning in 4 V–16 V supply systems. It delivers 10 MHz gain bandwidth, 17.2 V/µs negative slew rate, and 0.0003 % THD+N at 1 kHz with 4 VRMS output - enabling precision I/V conversion for ADC front-ends and active filtering in automotive and industrial test equipment.
For engineers reviewing the TSX921ILT datasheet, TSX921ILT pinout, TSX921ILT application, or TSX921ILT equivalent, key selection criteria include rail-to-rail operation across extended temperature (−40 °C to 125 °C), 10 pA typical input bias current, ESD tolerance (4 kV HBM), and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The TSX921ILT employs a CMOS input stage with unity-gain stability and internal compensation, supporting stable operation with capacitive loads up to 120 pF without external compensation. Its architecture maintains >55° phase margin and >5.9 dB gain margin across 4 V–16 V supply range and −40 °C to 125 °C ambient.
It achieves rail-to-rail output swing within 50 mV of either rail (at 10 kΩ load) and common-mode input range extending 0.1 V beyond rails - enabling direct interfacing with SAR and sigma-delta ADCs operating at varying reference voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10 MHz at 16 V - supports closed-loop bandwidths up to ~9.3 MHz with gain ≥2, suitable for anti-aliasing filters and wideband sensor amplification. |
| Slew Rate (SR−) | 17.2 V/µs at 16 V - enables full-scale 10 V step response in <250 ns, critical for fast-settling data acquisition paths. |
| THD+N | 0.0003 % at 1 kHz, 4 VRMS, 16 V supply - ensures minimal harmonic contamination in audio and precision measurement signal chains. |
| Input Bias Current | 10 pA typ - allows use with high-impedance sources (e.g., pH electrodes, photodiode transimpedance stages) without significant offset drift. |
| ESD Rating | 4 kV HBM - provides robustness against handling and board-level ESD events in automotive and factory-floor environments. |
| Supply Voltage Range | 4 V to 16 V - supports direct operation from 5 V, 12 V, and unregulated battery-derived rails without LDO pre-regulation. |
| Operating Temperature | −40 °C to 125 °C - qualified for under-hood automotive and industrial control applications requiring extended thermal reliability. |
Pinout & Package
SOT23-5 package: 2.9 mm × 1.6 mm × 1.1 mm body, 0.95 mm pitch, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VCC+ | Positive supply rail | Accepts 4–16 V; decoupling capacitor required within 1 cm for stability at high frequencies. |
| 2: IN− | Inverting input | High-impedance CMOS node; sensitive to layout-induced leakage; guard ring recommended in high-Z circuits. |
| 3: OUT | Amplifier output | Rail-to-rail capable; drives ≥10 kΩ load to within 50 mV of rails; limited sink/source current at extremes. |
| 4: VCC− | Negative supply rail / ground | Reference for all signals; must be low-impedance; separate analog/digital ground routing advised. |
| 5: IN+ | Non-inverting input | Differential pair input; matched to IN− for optimal CMRR; avoid asymmetric trace lengths. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization with single-supply ADCs and DACs; eliminates level-shifting circuitry. |
| 10 MHz GBP with unity-gain stability | Permits stable gain configurations from 1× to 10× without external compensation, reducing BOM count and layout area. |
| 17.2 V/µs negative slew rate | Ensures symmetrical large-signal transient response, critical for pulse amplification and multiplexed sensor readouts. |
| 0.0003 % THD+N at 1 kHz | Preserves signal fidelity in audio buffering, spectrum analysis front-ends, and high-resolution metrology systems. |
| Extended temperature range (−40 °C to 125 °C) | Validated for automotive powertrain and industrial motor control where ambient thermal stress exceeds commercial grade limits. |
Applications
| Communications Signal Conditioning | I/V Conversion for Precision ADCs |
|---|---|
Use Scenario: Amplifying low-amplitude RF detector outputs in cellular base station monitoring circuits. IC Role / Device Role / Timing Role: High-linearity transimpedance amplifier with 10 MHz bandwidth driving 16-bit SAR ADC inputs. Use Value: 0.0003 % THD+N prevents harmonic folding into Nyquist band; rail-to-rail output matches ADC's 0–5 V input range without clipping. | Use Scenario: Converting current-mode sensor outputs (e.g., 4–20 mA loops, photodiodes) to voltage for 24-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Low-bias-current, low-noise op-amp in precision transimpedance configuration with 10 pA input bias. Use Value: 10 pA input bias minimizes offset error in high-gain (>1 MΩ feedback) configurations; 8.6 µVPP (0.1–10 Hz) noise preserves resolution. |
| Active Anti-Aliasing Filtering | Automotive Sensor Interface |
Use Scenario: 2nd-order Sallen-Key low-pass filter preceding high-speed ADCs in oscilloscope digitizers. IC Role / Device Role / Timing Role: Unity-gain-stable buffer and filter amplifier with 10 MHz GBP enabling cutoff frequencies up to 1 MHz. Use Value: 10 MHz GBP and 17.2 V/µs slew rate ensure flat group delay and minimal phase distortion up to 100 kHz passband. | Use Scenario: Signal conditioning for exhaust gas oxygen (EGO) sensors and crankshaft position Hall-effect sensors in engine control units. IC Role / Device Role / Timing Role: Rail-to-rail amplifier interfacing millivolt-level sensor outputs to microcontroller ADCs across −40 °C to 125 °C. Use Value: Extended temperature rating and 4 kV HBM ESD withstand eliminate need for external protection in harsh under-hood environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV911ILT | Lower supply range (2.7–5.5 V), 8 MHz GBP, 15 V/µs slew rate, no automotive qualification. | Restricted to low-voltage portable instrumentation; unsuitable for 12 V automotive or industrial rails. | Select only for battery-powered devices requiring sub-5 V operation and lower power (1.1 mA ICC). |
| LMV931MG/NOPB | Wider temp range (−40 °C to 125 °C), 1.5 MHz GBP, 0.85 V/µs slew rate, higher input bias (100 pA). | Not viable for >100 kHz signal paths; insufficient bandwidth for active filtering or fast-settling ADC drivers. | Prefer for cost-sensitive, low-bandwidth sensor buffers where THD+N >0.01 % is acceptable. |
Compared with TSV911ILT and LMV931MG/NOPB, the TSX921ILT uniquely combines 10 MHz bandwidth, rail-to-rail operation at 16 V, and AEC-Q100-relevant temperature/ESD specs - making it the only option among the three qualified for high-fidelity, high-voltage automotive signal chains.
Availability
TSX921ILT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial process control loop transmitters, and communications test equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for TSX921ILT 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100-aligned quality systems.
The TSX92x family was designed specifically for high-speed, low-distortion analog signal conditioning in automotive and industrial applications demanding rail-to-rail performance, wide supply range, and extended temperature resilience.
FAQ
What is the maximum capacitive load the TSX921ILT can drive without instability?
The TSX921ILT remains stable with capacitive loads up to 120 pF when configured in unity-gain mode with a 10 kΩ load, as verified by phase margin >55° across temperature and supply voltage. For loads >47 pF, adding a 2–3 pF feedback capacitor improves settling time and reduces overshoot, per Figure 28 in DS9502 Rev 5.
Does the TSX921ILT have shutdown functionality?
No. The TSX921ILT does not include a shutdown pin. Shutdown capability is available only on the TSX920 (SOT23-6) and TSX923 (MiniSO10) variants. The TSX921ILT is a 5-pin fixed-function op-amp with no enable/disable control, simplifying layout but requiring external power gating for ultra-low standby current.
How does input offset voltage drift behave over temperature and time?
At 16 V supply, the TSX921ILT exhibits ∆Vio/∆T = 2–10 µV/°C and long-term drift of 1.73 nV/√month. Drift is minimized by avoiding comparator-mode operation with high differential input voltage and Vicm > VCC/2 at low temperatures, as permanent offset shifts may occur per Section 5.5 of DS9502.
Can the TSX921ILT be used with a single 5 V supply to interface with a 3.3 V ADC?
Yes. With VCC+ = 5 V and VCC− = 0 V, the TSX921ILT delivers rail-to-rail output (0–5 V) and accepts input common-mode voltage from −0.1 V to +5.1 V. To match a 3.3 V ADC, configure as a gain-of-0.66 attenuator using precision resistors, leveraging its 82 dB CMRR and 73 dB SVRR to reject supply noise and maintain accuracy.
TSX921ILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 17V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 pA
- Voltage - Input Offset:
- 4 mV
- Current - Supply:
- 2.8mA
- Current - Output / Channel:
- 74 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TSX921ILT FAQ
1.How can I place an order for TSX921ILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSX921ILT 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 TSX921ILT reliable?
The price and inventory of TSX921ILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSX921ILT is usually 5 days.
3.What payment methods are accepted for TSX921ILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSX921ILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSX921ILT?
TSX921ILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSX921ILT 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 TSX921ILT?
For technical support, including TSX921ILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSX921ILT requirements.
6.How does Aetrix verify that TSX921ILT is sourced from the original manufacturer or authorized distributors?
All TSX921ILT 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 TSX921ILT meets industry standards.
7.What is the process for return or replacement of TSX921ILT?
All TSX921ILT units undergo pre-shipment inspection (PSI). If there is an issue with TSX921ILT, 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 TSX921ILT part is unused and in its original packaging.
Return procedure for TSX921ILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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