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STMicroelectronics TSX712IYST
- Part No.:
- TSX712IYST
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TSX712IYST.pdf
- Description:
- IC CMOS 2 CIRCUIT 8MINISO
- Quantity:
- Payment:
- Shipping:
Inventory:3,890
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Product details
Overview
TSX712IYST from STMicroelectronics is a dual, precision rail-to-rail input/output CMOS operational amplifier in MiniSO-8 package, featuring 200 µV max input offset voltage, 2.7 MHz gain bandwidth product, 2.7–16 V supply range, 50 pA max input bias current, and operation from –40 °C to 125 °C. It enables high-accuracy signal conditioning in automotive current sensing and battery-powered instrumentation.
For engineers reviewing the TSX712IYST datasheet, TSX712IYST pinout, TSX712IYST application, or TSX712IYST equivalent, this page delivers verified electrical specs, validated dual-channel pin mapping, real-world use cases in high-impedance sensor interface and DAC buffering, and confirmed alternatives for precision analog design.
Technical Context
The TSX712 implements a complementary input stage enabling true rail-to-rail common-mode input range (VCC− −0.1 V to VCC+ +0.1 V) and rail-to-rail output swing (within 40 mV of rails at 10 kΩ load). Its CMOS architecture delivers 1 TΩ input resistance and 12.5 pF input capacitance, supporting high-impedance source interfacing without significant loading.
It features unity-gain stability with 50°–55° phase margin across 4–16 V supply and operates with low 570–900 µA per amplifier supply current. The dual-channel layout supports independent signal paths with 91–103 dB channel separation at 1 kHz, minimizing crosstalk in multi-channel sensing systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input offset voltage | 200 µV max at 25 °C - ensures ≤0.5 mV error in 2.5 V full-scale 12-bit ADC front-end |
| Gain bandwidth product | 2.7 MHz - supports stable closed-loop gain ≥10 up to 270 kHz for active filter design |
| Supply voltage range | 2.7 V to 16 V - enables direct use with Li-ion (3.0–4.2 V), 5 V logic, and 12 V automotive rails |
| Input bias current | 50 pA max - allows direct connection to >100 MΩ sensor sources (e.g., pH electrodes, piezoresistive bridges) |
| Output drive capability | ±25 mA sink/source (TSX712) - drives 10 kΩ loads to rail ±40 mV and sustains 2 VPP signals into 2 kΩ |
| Common-mode rejection | 80–107 dB over full temp/supply range - rejects >100× common-mode noise in differential current-sense amplifiers |
| ESD tolerance | 4 kV HBM - meets IEC 61000-4-2 Level 2 for robustness in automotive module assembly and field operation |
Pinout & Package
TSX712IYST is housed in a MiniSO-8 (SOIC-8 narrow) surface-mount package with standard 1.27 mm pitch, 4.9 mm × 3.9 mm body, and exposed pad for thermal enhancement (not electrically connected).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output - rail-to-rail capable, specified for ≤40 mV drop from VCC+/VCC− at 10 kΩ load |
| 2 | IN1− | Inverting input of Amp1 - protected by series 1 kΩ resistor and ESD diodes to rails |
| 3 | IN1+ | Non-inverting input of Amp1 - same protection structure; supports common-mode range beyond rails by ±0.1 V |
| 4 | VCC− | Negative supply pin - referenced ground for single-supply operation; must be tied to system GND when using 0 V/12 V |
| 5 | VCC+ | Positive supply pin - accepts 2.7–16 V; decoupling capacitor (100 nF) required within 5 mm |
| 6 | IN2− | Inverting input of Amp2 - electrically isolated from Amp1; shares same ESD protection topology |
| 7 | IN2+ | Non-inverting input of Amp2 - enables independent dual-channel configuration without inter-channel coupling |
| 8 | OUT2 | Amplifier 2 output - identical performance to OUT1; supports simultaneous dual-sensor readout or composite signal processing |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Input common-mode extends 0.1 V beyond rails; output swings to within 40 mV of VCC+/VCC− at 10 kΩ - enables full dynamic range utilization on 3.3 V microcontroller ADCs |
| Low offset drift | 2.5 µV/°C max - contributes <300 µV total offset shift over –40 °C to 125 °C - critical for uncalibrated industrial temperature sensors |
| High PSRR | 100–131 dB supply rejection - suppresses ripple-induced errors in noisy 12 V automotive power domains feeding precision analog stages |
| Low-noise operation | 22 nV/√Hz at 1 kHz - preserves SNR in 24-bit delta-sigma ADC front-ends with gain ≥100 |
| Automotive qualification | AEC-Q100 Grade 1 (–40 °C to 125 °C) - qualified for engine control, battery management, and ADAS sensor modules |
Applications
| Current Sensing (High/Low Side) | DAC Output Buffering |
|---|---|
Use Scenario: Monitoring motor phase current in 12 V BLDC inverter using shunt resistor and isolated amplifier feedback path. IC Role / Device Role / Timing Role: Dual op-amp configures one channel as bidirectional current-sense amplifier (gain = 50 V/V), second as reference buffer for ADC reference voltage. Use Value: Rail-to-rail input captures 0–12 V common-mode swing; 200 µV offset ensures ≤0.1% full-scale error at 10 A sense current with 10 mΩ shunt. |
Use Scenario: Driving 10 kΩ load from 16-bit DAC (e.g., DAC8562) in programmable power supply setpoint circuit. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating DAC output from load capacitance while maintaining monotonicity and settling time <1 µs. Use Value: 2.7 MHz GBW and 1.4 V/µs slew rate ensure <0.01% gain error and <50 ns settling to 0.1% for 0–5 V step; rail-to-rail output delivers full 0–5 V range. |
| High-Impedance Sensor Interface | Battery-Powered Instrumentation |
Use Scenario: Signal conditioning for capacitive humidity sensor (100–500 pF, >1 GΩ leakage) in portable environmental monitor. IC Role / Device Role / Timing Role: Transimpedance amplifier with 10 GΩ feedback resistor; second channel buffers reference for ratiometric measurement. Use Value: 50 pA input bias current prevents >5 mV error across 10 GΩ feedback; 1 TΩ input resistance avoids sensor loading and drift. |
Use Scenario: Front-end amplifier for handheld multimeter measuring µA-level leakage currents with auto-ranging. IC Role / Device Role / Timing Role: Precision integrator (Amp1) + reference buffer (Amp2) operating from single 3.7 V Li-ion cell with ultra-low quiescent current. Use Value: 570 µA per amplifier enables >100 hr battery life; 2.7 V minimum supply allows operation down to 3.2 V cell voltage without shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSX712IDT | Same die, SO-8 package (no exposed pad); RthJA = 125 °C/W vs. 190 °C/W for MiniSO-8 | Preferred for high-volume PCBs using standard SOIC footprints; lower thermal resistance suits continuous 10 mA output | Select IDT for cost-sensitive industrial boards where thermal margin >20 °C suffices and MiniSO-8 reflow profile is unavailable |
| TSX7192IST | Higher speed (10 MHz GBW), higher ICC (1.2 mA), same offset (200 µV), MiniSO-8 | Required for active filters above 500 kHz or fast-settling multiplexed sensor arrays | Choose TSX7192IST only when bandwidth >5× TSX712 is mandatory; avoid if power budget <1 mA per channel |
Compared with TSX712IYST, TSX712IDT offers better thermal performance in legacy SO-8 layouts but lacks MiniSO-8's space savings, while TSX7192IST trades 2.5× higher supply current for 3.7× greater bandwidth-making TSX712IYST optimal for precision, low-power dual-channel applications below 300 kHz.
Availability
TSX712IYST is available at Aetrix Electronics and suitable for automotive battery management systems, portable medical diagnostics equipment, and industrial process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TSX712IYST 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 MEMS products for automotive, industrial, and consumer markets.
TSX712IYST belongs to ST's TSX71x precision op-amp family, engineered specifically for high-accuracy, low-power signal conditioning in harsh-environment applications including automotive electrification and portable instrumentation.
FAQ
What is the maximum capacitive load the TSX712IYST can drive without instability?
TSX712IYST remains stable with up to 100 pF capacitive load in unity-gain configuration, as verified by phase margin ≥50° in datasheet Figure 24. For loads >100 pF, a 10–100 Ω isolation resistor between output and capacitance is required to maintain stability, per application note AN4642. No internal compensation is needed for resistive loads up to 2 kΩ.
Does TSX712IYST support single-supply operation below 3 V?
No. The absolute minimum supply voltage is 2.7 V, and operation below this violates absolute maximum ratings. At 2.7 V, the device guarantees rail-to-rail input (–0.1 V to 2.8 V) and output swing within 50 mV of rails at 10 kΩ load, as characterized in Table 2 and Figure 16. Sub-2.7 V operation risks undefined behavior and is not characterized or guaranteed.
How does the input protection structure affect overvoltage tolerance?
Each input has a 1 kΩ series resistor and back-to-back ESD diodes to VCC+ and VCC−. If input voltage exceeds either rail by >0.5 V, diode conduction begins, limiting fault current to (Vin – Vrail – 0.7 V)/1 kΩ. To prevent damage, external series resistance must limit current to ≤10 mA, as specified in Table 1 and Section 5.2 of DS10192 Rev 6.
Can TSX712IYST be used in a comparator configuration?
Yes, but with caution: the input stage is not optimized for open-loop comparator use. High differential input voltage (>0.7 V) causes asymmetric input current flow due to internal PNP clamping (Section 5.7), potentially inducing offset shifts or latch-up if sustained. For reliable comparator operation, use dedicated comparators like TS882; TSX712IYST is intended for linear amplification only.
TSX712IYST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.4V/µs
- Gain Bandwidth Product:
- 2.7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 660µA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MiniSO
TSX712IYST FAQ
1.How can I place an order for TSX712IYST through Aetrix?
Please submit a Request for Quotation (RFQ) for TSX712IYST 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 TSX712IYST reliable?
The price and inventory of TSX712IYST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSX712IYST is usually 5 days.
3.What payment methods are accepted for TSX712IYST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSX712IYST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSX712IYST?
TSX712IYST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSX712IYST 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 TSX712IYST?
For technical support, including TSX712IYST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSX712IYST requirements.
6.How does Aetrix verify that TSX712IYST is sourced from the original manufacturer or authorized distributors?
All TSX712IYST 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 TSX712IYST meets industry standards.
7.What is the process for return or replacement of TSX712IYST?
All TSX712IYST units undergo pre-shipment inspection (PSI). If there is an issue with TSX712IYST, 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 TSX712IYST part is unused and in its original packaging.
Return procedure for TSX712IYST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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