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STMicroelectronics TSV991IQ2T
- Part No.:
- TSV991IQ2T
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
TSV991IQ2T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,376
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Product details
Overview
TSV991IQ2T from STMicroelectronics is a single-channel, rail-to-rail input/output operational amplifier optimized for low-voltage, low-power applications. It delivers 20 MHz gain-bandwidth at 820 µA supply current, supports 2.5 V to 5.5 V operation, features 1.5 mV max input offset voltage (A grade), and drives ±35 mA output current - enabling precision signal conditioning in battery-powered medical and automotive sensor interfaces.
For engineers reviewing the TSV991IQ2T datasheet, TSV991IQ2T pinout, TSV991IQ2T application, or TSV991IQ2T equivalent, key selection considerations include its minimum stable gain requirement (≥4 or ≤−3), ultra-low 1 pA typical input bias current, rail-to-rail swing capability, and DFN8 2×2 mm package suitability for space-constrained portable designs.
Technical Context
The TSV991IQ2T employs a high-speed voltage-feedback architecture with internal compensation tailored for non-unity-gain stability - requiring minimum closed-loop gain of 4 (non-inverting) or −3 (inverting) to ensure ≥45° phase margin with 100 pF capacitive load. Its input stage uses complementary NPN/PNP transistors to achieve rail-to-rail common-mode range (VCC− −0.1 V to VCC+ +0.1 V) and ultra-low input bias current (1 pA typ.).
Output stage is class AB with symmetrical sourcing/sinking capability (35 mA typ.), enabling direct drive of moderate resistive loads (≥2 kΩ) and buffered capacitive loads. ESD protection exceeds 5 kV HBM, and thermal resistance is 57 °C/W (DFN8 2×2), supporting operation from −40 °C to +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 20 MHz - enables stable amplification of signals up to ~5 MHz at gain = 4, suitable for active filtering and sensor front-end bandwidth extension. |
| Supply current (typ.) | 820 µA - allows continuous operation for >1 year on a 200 mAh coin cell in always-on portable instrumentation. |
| Input offset voltage (max) | 1.5 mV (A grade) - limits DC error to <0.3% of full-scale in 0–5 V measurement systems without trimming. |
| Input bias current (typ.) | 1 pA - permits use with high-impedance sources (e.g., pH electrodes, piezoelectric sensors) without significant signal attenuation. |
| Output drive (min) | ±32 mA - supports direct interface to 100 Ω loads or driving ADC reference buffers without external gain stages. |
| Common-mode input range | VCC− −0.1 V to VCC+ +0.1 V - enables sensing across full supply rail in single-supply configurations (e.g., 3.3 V battery monitoring). |
| Stable gain range | ≥4 (non-inverting) or ≤−3 (inverting) - mandates external resistor network design to avoid oscillation; not usable as unity-gain buffer without series output resistor. |
Pinout & Package
TSV991IQ2T is housed in a 2×2 mm DFN8 package with exposed pad (unconnected, may be floated or tied to VCC−). Pin 1 is marked by dot; pin 1 = NC, pin 2 = IN+, pin 3 = IN−, pin 4 = OUT, pin 5 = VCC−, pin 6 = VCC+, pins 7–8 = NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No connect | Internally unconnected; must remain floating or grounded per layout best practice - no electrical function. |
| Pin 2 (IN+) | Non-inverting input | Rail-to-rail capable node; accepts signals from VCC− −0.1 V to VCC+ +0.1 V; 1 pA bias current minimizes loading on high-Z sources. |
| Pin 3 (IN−) | Inverting input | Differential input terminal; used with feedback network to set closed-loop gain; matched to IN+ for low Vio drift. |
| Pin 4 (OUT) | Amplifier output | Class AB stage delivering ±32 mA min; rail-to-rail swing (within 15 mV of rails at 10 kΩ); requires local 10 nF decoupling near pins 5/6. |
| Pin 5 (VCC−) | Negative supply | Ground reference for single-supply operation; exposed pad may be soldered to this net for thermal relief (Rthja = 57 °C/W). |
| Pin 6 (VCC+) | Positive supply | Accepts 2.5–5.5 V; internal ESD protection (5 kV HBM) referenced to this pin; decoupling capacitor mandatory. |
| Pins 7–8 (NC) | No connect | Unused die pads; electrically isolated; recommended to leave unconnected or tie to VCC− for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in 2.5 V–5.5 V single-supply systems - e.g., output swings within 15 mV of rails at 10 kΩ load. |
| 20 MHz GBW at 820 µA | Delivers 10 V/µs slew rate with only 0.82 mA supply - achieves 5× higher speed/power ratio than legacy 1 MHz op-amps. |
| 1.5 mV max Vio (A grade) | Reduces calibration overhead in precision analog front-ends; maintains <0.03% linearity error over 0–100 °C in 3.3 V systems. |
| 1 pA typical input bias | Permits direct connection to >1 GΩ impedance sources (e.g., photodiode transimpedance amps) without guard rings or bias cancellation. |
| Stable at gain ≥4 or ≤−3 | Eliminates need for external compensation in standard gain configurations - simplifies filter design versus unity-gain-stable alternatives. |
Applications
| Portable ECG Monitor | Battery Voltage Supervisor |
|---|---|
|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in handheld cardiac monitors. IC Role / Device Role / Timing Role: Primary signal-conditioning amplifier in first-stage instrumentation chain, providing 100× gain with DC-coupled rail-to-rail input. Use Value: 1 pA input bias prevents electrode polarization drift; 1.5 mV Vio ensures <1% baseline error over temperature; 20 MHz GBW rejects RF interference without added filtering. |
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in wireless earbuds and wearables. IC Role / Device Role / Timing Role: Precision buffer and level-shifter between battery sense point and 12-bit SAR ADC input. Use Value: Rail-to-rail input captures full 2.5–4.2 V range; 820 µA quiescent current extends standby time; DFN8 2×2 footprint saves PCB area vs. SO8 alternatives. |
| Automotive Cabin Air Quality Sensor | Industrial Temperature Transmitter |
|
Use Scenario: Conditioning output of NDIR CO₂ sensor with thermopile detector and integrated reference. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier (TIA) stage converting photocurrent to voltage before ADC digitization. Use Value: 21 nV/√Hz input noise preserves SNR in low-light conditions; −40 °C to +125 °C rating meets AEC-Q100 Grade 1 requirements; 5 kV HBM ESD withstands assembly handling. |
Use Scenario: Signal conditioning for 4–20 mA loop-powered RTD temperature transmitters in factory automation. IC Role / Device Role / Timing Role: Precision voltage reference buffer and excitation current source amplifier in 3-wire RTD bridge circuit. Use Value: 70 dB min SVR rejects supply ripple from noisy industrial 24 V rails; CMR >55 dB suppresses common-mode noise from long sensor cables; stable gain ≥4 simplifies loop calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision, low-power op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV911IYLT | 8 MHz GBW, unity-gain stable, 1.1 mA ICC, same 1.5 mV Vio (A grade) | Supports follower configurations; lower bandwidth suits slower sensor signals (e.g., thermocouples) | Select when unity-gain buffering is required and 20 MHz is unnecessary - reduces design complexity and layout sensitivity. |
| MCP6001T-I/OT | 1 MHz GBW, rail-to-rail I/O, 100 nA Iib, 100 µA ICC, 2 mV Vio (max) | Ultra-low power; lower precision; SOT23-5 only | Choose for sub-100 µA system budgets where bandwidth <100 kHz suffices - trades speed and bias current for 8× lower ICC. |
Compared with TSV991IQ2T, TSV911IYLT offers simpler gain configuration but sacrifices bandwidth and output drive; MCP6001T-I/OT provides extreme power savings but lacks the precision, speed, and drive strength needed for demanding sensor front-ends.
Availability
TSV991IQ2T is available at Aetrix Electronics and suitable for portable medical devices, automotive cabin sensors, and industrial 4–20 mA transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TSV991IQ2T 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The TSV99x family was developed specifically for high-accuracy, low-power signal conditioning in battery-operated and space-constrained systems - emphasizing rail-to-rail operation, low input bias, and optimized speed/power trade-offs.
FAQ
Can TSV991IQ2T be used as a unity-gain buffer?
No - the TSV991IQ2T is not unity-gain stable and will oscillate if configured as a voltage follower. Stability requires minimum closed-loop gain of 4 (non-inverting) or −3 (inverting). To implement buffer functionality, add a 10–100 Ω series resistor between output and load, or select the unity-gain-stable TSV911IYLT instead.
What is the maximum capacitive load the TSV991IQ2T can drive without instability?
With proper gain configuration (≥4 or ≤−3), the TSV991IQ2T remains stable with up to 100 pF capacitive load at the output, as verified in datasheet Figure 8–9. For larger loads, add a small series resistor (e.g., 10–50 Ω) at the output or use a feedback capacitor across Rf in inverting configurations to suppress peaking.
Is the exposed pad on the DFN8 2×2 package electrically connected?
No - the exposed pad on the TSV991IQ2T's DFN8 2×2 package is not internally connected to any die node. Per datasheet Figure 20, it may be left floating or soldered to VCC− for improved thermal performance (reducing Rthja from 57 °C/W to ~45 °C/W with 1 cm² copper pour).
How does the TSV991IQ2T perform in automotive-grade applications?
The TSV991IQ2T operates across −40 °C to +125 °C and meets AEC-Q100 stress test requirements when ordered as automotive-grade variants (e.g., TSV991IYDT). While TSV991IQ2T itself is commercial-grade, its electrical specs - including 5 kV HBM ESD, 150 °C max junction temperature, and robust CMR/SVR - align with automotive subsystem reliability needs when properly derated.
TSV991IQ2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 820µA
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
TSV991IQ2T FAQ
1.How can I place an order for TSV991IQ2T through Aetrix?
Please submit a Request for Quotation (RFQ) for TSV991IQ2T 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 TSV991IQ2T reliable?
The price and inventory of TSV991IQ2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSV991IQ2T is usually 5 days.
3.What payment methods are accepted for TSV991IQ2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSV991IQ2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSV991IQ2T?
TSV991IQ2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSV991IQ2T 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 TSV991IQ2T?
For technical support, including TSV991IQ2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSV991IQ2T requirements.
6.How does Aetrix verify that TSV991IQ2T is sourced from the original manufacturer or authorized distributors?
All TSV991IQ2T 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 TSV991IQ2T meets industry standards.
7.What is the process for return or replacement of TSV991IQ2T?
All TSV991IQ2T units undergo pre-shipment inspection (PSI). If there is an issue with TSV991IQ2T, 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 TSV991IQ2T part is unused and in its original packaging.
Return procedure for TSV991IQ2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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