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STMicroelectronics TSV781ILT
- Part No.:
- TSV781ILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TSV781ILT.pdf
- Description:
- HIGH BANDWIDTH (30 MHZ) LOW OFFS
- Quantity:
- Payment:
- Shipping:
Inventory:1,521
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Product details
Overview
TSV781ILT from STMicroelectronics is a single-channel, rail-to-rail input/output operational amplifier optimized for high-bandwidth precision signal conditioning. It delivers 30 MHz gain bandwidth, 20 V/µs slew rate, 2 pA typical input bias current, 7 nV/√Hz input voltage noise at 10 kHz, and operates from 2.0 V to 5.5 V supply - enabling accurate low-side current sensing in automotive HEV/EV power stages.
For engineers reviewing the TSV781ILT datasheet, TSV781ILT pinout, TSV781ILT application, or TSV781ILT equivalent, key selection criteria include its ultra-low input bias current for photodiode transimpedance amplification, rail-to-rail operation with 10 mV output saturation at 25 °C, and guaranteed performance across –40 °C to +125 °C for automotive-grade designs.
Technical Context
The TSV781ILT employs a unity-gain-stable voltage-feedback architecture with 45–50° phase margin and 9 dB gain margin, validated across 2.0 V–5.5 V supplies and 47 pF capacitive load. Its input stage uses complementary bipolar transistor pairs to achieve 2 pA bias current and 200 µV max input offset voltage over temperature.
It supports rail-to-rail common-mode input range (VCC− −0.1 V to VCC+ +0.1 V) and output swing within 10 mV of rails at 25 °C, while maintaining 3.3 mA quiescent current at 5 V - delivering a high speed/power ratio critical for A/D converter buffering and fast current-loop feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 30 MHz - enables stable closed-loop operation up to 10× gain at 3 MHz or unity-gain buffer for 10–20 MHz sensor signals. |
| Slew Rate | 20 V/µs - supports full-scale step response in ≤100 ns for 2 V output swing, critical for fast current-sense transient capture. |
| Input Bias Current | 2 pA typ. - permits direct connection to photodiodes and high-impedance sensors without measurable current-induced offset error. |
| Input Voltage Noise | 7 nV/√Hz @ 10 kHz - ensures minimal added noise in 10–100 kHz bandwidth applications like motor phase current reconstruction. |
| Supply Voltage Range | 2.0 V to 5.5 V - allows direct interface with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive use and industrial solar inverter control circuits. |
| Output Drive | ±55 mA min. - sustains 10 kΩ load with <20 mV saturation at rail, supporting buffered ADC inputs and active filtering stages. |
Pinout & Package
TSV781ILT is housed in a compact SOT23-5 surface-mount package with exposed pad (not electrically connected), optimized for thermal dissipation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Amplifier output | Delivers rail-to-rail voltage swing; requires no series resistor unless driving >22 pF capacitive load in unity-gain configuration. |
| 2 VCC− | Negative supply terminal | Reference ground for single-supply operation; connects to system GND or negative rail in dual-supply configurations. |
| 3 IN+ | Non-inverting input | Accepts common-mode voltages from VCC− −0.1 V to VCC+ +0.1 V; low 6.3 pF differential capacitance minimizes high-frequency phase shift. |
| 4 IN− | Inverting input | Used for feedback network connection; matched input capacitance ensures balanced AC response in differential configurations. |
| 5 VCC+ | Positive supply terminal | Accepts 2.0–5.5 V DC; internal ESD protection rated to 4 kV HBM enables robust handling in automated assembly environments. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in 3.3 V systems - e.g., 0–3.3 V ADC input buffering without headroom loss. |
| 30 MHz GBP + 20 V/µs SR | Supports closed-loop bandwidth >1 MHz with gain ≥10, making it suitable for real-time current-loop compensation in motor drives. |
| 2 pA input bias current | Reduces error to <1 µV in 1 MΩ source impedance applications - essential for photodiode transimpedance gain accuracy. |
| 7 nV/√Hz input noise | Limits integrated noise to ~12 µVpp in 10 kHz–1 MHz band, preserving SNR in precision current measurement below 100 mΩ shunts. |
| Automotive grade option | TSV781IYLT variant meets AEC-Q100 Grade 1 qualification - same electrical specs with extended reliability screening for vehicle ECUs. |
Applications
| High-Side Current Sensing | Photodiode Transimpedance Amplifier |
|---|---|
|
Use Scenario: Monitoring battery pack voltage and current in hybrid electric vehicle (HEV) battery management systems using high-side shunt resistors. IC Role / Device Role / Timing Role: Precision voltage amplifier converting shunt voltage drop into clean, low-noise signal for 16-bit SAR ADC sampling at 1 MSPS. Use Value: 200 µV max input offset and 2 pA bias current ensure <0.1% full-scale error across –40 °C to +125 °C, eliminating calibration drift. |
Use Scenario: Converting photocurrent from UV-sensitive diode in industrial flame detection circuitry. IC Role / Device Role / Timing Role: Transimpedance amplifier with 100 kΩ feedback resistor, requiring low input current and wide bandwidth for 100 kHz pulse detection. Use Value: 30 MHz GBP and 20 V/µs slew rate support fast rise-time response (<35 ns), while 2 pA bias current prevents dark-current-induced baseline shift. |
| A/D Converter Input Buffer | Solar Power Management |
|
Use Scenario: Driving the input of a 12-bit successive-approximation ADC in a programmable logic controller (PLC) analog input module. IC Role / Device Role / Timing Role: Unity-gain buffer isolating multiplexed sensor channels from ADC input capacitance, ensuring settling within 1.5 µs to 12-bit accuracy. Use Value: Rail-to-rail output swing and 47 pF load specification guarantee monotonicity and full-scale linearity without external compensation components. |
Use Scenario: Regulating MPPT (maximum power point tracking) reference voltage in off-grid solar charge controllers powered by 3.3 V LDOs. IC Role / Device Role / Timing Role: Error amplifier in voltage-controlled current source loop, comparing sensed panel voltage against reference and adjusting MOSFET gate drive. Use Value: 2.0 V minimum supply enables direct operation from energy-harvesting PMIC outputs; 125 °C rating supports enclosure-mounted outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-input-bias op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV771ILT | 22 MHz GBP, 12 V/µs SR, 10 pA IIB, lower 2.5 mA ICC | Better power efficiency but insufficient bandwidth for >500 kHz current-loop feedback | Select when supply current <2.7 mA is mandatory and bandwidth ≤1 MHz suffices. |
| TSV791ILT | 50 MHz GBP, 35 V/µs SR, 5 pA IIB, higher 5.2 mA ICC | Higher noise (10 nV/√Hz) and reduced rail-to-rail output swing at low VCC | Choose for >20 MHz closed-loop bandwidth needs where 3.3 V operation and ultra-low bias are secondary. |
Compared with TSV771ILT, TSV781ILT trades 0.8 mA higher supply current for +8 MHz bandwidth and 5× lower input bias - critical for photodiode and shunt-based current sensing. Against TSV791ILT, it sacrifices 20 MHz bandwidth to retain superior low-voltage rail-to-rail output and lower noise at 10 kHz.
Availability
TSV781ILT is available at Aetrix Electronics and suitable for high-bandwidth current sensing, photodiode signal conditioning, and A/D converter buffering requiring stable component supply across automotive, industrial solar, and HEV/EV power electronics programs.
Supply support for TSV781ILT 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 automotive, industrial, and consumer markets.
The TSV78x series belongs to ST's precision high-speed op amp product line, engineered specifically for accuracy-critical signal chains in automotive battery monitoring, renewable energy inverters, and optical sensing systems.
FAQ
Is TSV781ILT qualified for automotive applications?
Yes - the TSV781ILT is industrial-grade, while its pin-compatible variant TSV781IYLT is AEC-Q100 Grade 1 qualified for automotive use. Both share identical electrical specifications, but only the IYLT suffix indicates automotive qualification with extended reliability testing including HTOL, ESD, and temperature cycling per AEC standards.
Can TSV781ILT drive a 100 pF capacitive load in unity-gain configuration?
No - stability analysis shows gain peaking and overshoot occur above 22 pF. For 100 pF loads, insert a 10–22 Ω isolation resistor (RISO) in series with the output. This preserves DC accuracy while damping resonance, as verified in Figure 27 of DS14011 Rev 7.
What is the maximum output current capability at 2.0 V supply?
At VCC = 2.0 V and T = 25 °C, TSV781ILT delivers ±45 mA sink/source current before output saturation exceeds 20 mV. Derating applies above 85 °C ambient; full ±32 mA is guaranteed across –40 °C to +125 °C per Table 5 and Table 7.
Does TSV781ILT require external compensation for stability?
No - it is unity-gain stable with ≥45° phase margin across all specified conditions (2.0–5.5 V, –40 °C to +125 °C, 47 pF load). External compensation is unnecessary unless driving >22 pF purely capacitive loads, where RISO insertion is recommended per Section 5.7 of the datasheet.
TSV781ILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 1
- Output Type:
- Single Ended, Rail-to-Rail
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 30 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 3.3mA
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 2 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TSV781ILT FAQ
1.How can I place an order for TSV781ILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSV781ILT 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 TSV781ILT reliable?
The price and inventory of TSV781ILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSV781ILT is usually 5 days.
3.What payment methods are accepted for TSV781ILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSV781ILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSV781ILT?
TSV781ILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSV781ILT 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 TSV781ILT?
For technical support, including TSV781ILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSV781ILT requirements.
6.How does Aetrix verify that TSV781ILT is sourced from the original manufacturer or authorized distributors?
All TSV781ILT 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 TSV781ILT meets industry standards.
7.What is the process for return or replacement of TSV781ILT?
All TSV781ILT units undergo pre-shipment inspection (PSI). If there is an issue with TSV781ILT, 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 TSV781ILT part is unused and in its original packaging.
Return procedure for TSV781ILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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