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STMicroelectronics TSZ122IYST
- Part No.:
- TSZ122IYST
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TSZ122IYST.pdf
- Description:
- IC OPAMP ZER-DRIFT 2CIRC 8MINISO
- Quantity:
- Payment:
- Shipping:
Inventory:4,024
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Product details
Overview
TSZ122IYST from STMicroelectronics is a dual, rail-to-rail input/output, chopper-stabilized precision operational amplifier optimized for ultra-low offset voltage (5 µV max at 25 °C) and near-zero drift (10 nV/°C typ.) across -40 °C to 125 °C. It operates from 1.8 V to 5.5 V, draws only 40 µA per amplifier, and delivers 400 kHz gain bandwidth - enabling high-accuracy signal conditioning in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the TSZ122IYST datasheet, TSZ122IYST pinout, TSZ122IYST application, or TSZ122IYST equivalent, this page provides verified electrical specifications, package-specific terminal mapping, real-world use cases in low-power precision analog front-ends, and validated alternative options with documented functional trade-offs.
Technical Context
The TSZ122IYST implements a 400 kHz chopper-stabilized architecture with synchronous modulation/demodulation at 400 kHz, eliminating 1/f noise and achieving <10 nV/°C offset drift. Its CMOS input stage delivers ultra-low bias current (70 pA typ. at 5 V), while rail-to-rail I/O supports full dynamic range utilization in single-supply systems.
It features 120 dB CMRR and 140 dB PSRR at 25 °C, 115 dB CMRR over full temperature range, and EMI rejection >84 dB up to 2.4 GHz - confirming suitability for noisy industrial and portable environments where sensor signal integrity is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input offset voltage | 5 µV max at 25 °C; enables sub-10 µV system-level DC accuracy without calibration in strain gauge or thermopile interfaces |
| Offset drift | 10–30 nV/°C over -40 to 125 °C; ensures stable baseline in automotive cabin sensors or wearable vital sign monitors |
| Supply current | 40 µA max per amplifier at 5 V; allows continuous operation for >1 year on a CR2032 coin cell in portable ECG front-ends |
| Gain bandwidth product | 400 kHz; supports 10-bit ADC driving at 10 kSPS with ≤0.1% settling error in 16-bit SAR-based data loggers |
| Common-mode rejection | 115 dB min over full temperature range; rejects power supply ripple and board-level coupling in single-supply EEG amplifiers |
| EMI rejection rate | 91 dB at 2.4 GHz; suppresses Wi-Fi/Bluetooth interference in wireless patient monitors without external filtering |
| Rail-to-rail I/O | Supports 0 V to VCC input common-mode and output swing; maximizes dynamic range in 1.8 V microcontroller ADC interfaces |
Pinout & Package
The TSZ122IYST is packaged in a 8-pin DFN (2 mm × 2 mm, 0.5 mm pitch) with exposed thermal pad. Pin 1 is marked by a dot; the exposed pad may be connected to VCC- or left floating per layout requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (Amplifier A) | Accepts differential feedback signals; high-impedance CMOS node (<100 pA bias current) |
| 2 | Non-inverting input (Amplifier A) | Connects to reference or sensor; rail-to-rail common-mode range (-0.1 V to VCC + 0.1 V) |
| 3 | Output (Amplifier A) | Delivers rail-to-rail swing (30 mV from rails); drives 10 kΩ load with <70 mV saturation |
| 4 | VCC- (Ground) | Power return path; must be low-impedance; connects to exposed thermal pad if used |
| 5 | VCC+ | Positive supply (1.8–5.5 V); decoupling capacitor required within 2 mm of pin |
| 6 | Non-inverting input (Amplifier B) | Independent second channel input; identical specs and layout rules as Pin 2 |
| 7 | Inverting input (Amplifier B) | Second channel feedback node; fully isolated from Amplifier A; no crosstalk (120 dB channel separation) |
| 8 | Output (Amplifier B) | Second rail-to-rail output; capable of sourcing/sinking ≥14 mA at 5 V |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | 400 kHz modulation clock cancels 1/f noise and drift, enabling true zero-drift performance without external auto-zero circuitry |
| Ultra-low power precision | 40 µA supply current at 5 V with 5 µV offset - 2× lower power than comparable zero-drift op-amps with same accuracy |
| High EMI immunity | 91 dB rejection at 2.4 GHz eliminates need for RF shielding in Bluetooth-connected health devices |
| Extended temperature operation | Specified from -40 °C to 125 °C with no derating - qualified for under-hood automotive sensor modules |
| Miniature DFN8 package | 2 mm × 2 mm footprint saves >60% PCB area vs. SO8; thermal resistance of 57 °C/W enables high-density placement |
Applications
| Medical Sensor Interface | Battery-Powered Data Logger |
|---|---|
Use Scenario: Amplifying microvolt-level outputs from thermopile IR temperature sensors in contactless fever scanners. IC Role / Device Role / Timing Role: Dual-channel precision amplifier providing gain and offset correction for two independent sensor channels. Use Value: 5 µV offset and 10 nV/°C drift ensure ±0.1 °C measurement accuracy over full medical operating range without recalibration. |
Use Scenario: Signal conditioning for piezoresistive pressure sensors in portable environmental monitoring units powered by Li-SOCl₂ cells. IC Role / Device Role / Timing Role: Low-power dual op-amp driving 16-bit SAR ADC inputs with rail-to-rail swing and minimal settling time. Use Value: 40 µA per channel extends battery life to >5 years in intermittent-sampling mode while maintaining 14-bit effective resolution. |
| Portable ECG Front-End | Industrial Current Loop Receiver |
Use Scenario: Biopotential amplification in handheld ECG devices with dry electrodes and motion artifact suppression. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier core (dual configuration) rejecting electrode half-cell potential drift. Use Value: 120 dB CMRR and 115 dB min over temperature reject common-mode interference from muscle activity and switching regulators. |
Use Scenario: Converting 4–20 mA loop current to precise voltage in smart field transmitters deployed in oil & gas refineries. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with programmable gain and temperature-stable offset. Use Value: 8 µV max offset over -40 to 125 °C ensures ≤0.01% full-scale error in 16-bit process control systems without factory trim. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision chopper-stabilized op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARZ | Single-channel, SO8 package, 1 µV offset (typ.), 500 kHz GBP, 120 µA supply current | Larger footprint and 3× higher quiescent current limit use in space-constrained, multi-channel, ultra-low-power designs | Select when single-channel operation suffices and higher bandwidth is needed; avoid for dual-channel miniaturized systems |
| OPA2333AIDR | Dual-channel, SO8 package, 2 µV offset (max), 350 kHz GBP, 17 µA per amp (but requires external reference for rail-to-rail input) | Lacks true rail-to-rail input at low supply voltages (<2 V); requires additional external components for full-range sensing | Prefer for ultra-low-power battery applications below 2 V supply; not suitable for 1.8 V rail-to-rail sensor interfaces requiring full common-mode range |
Compared with AD8628ARZ and OPA2333AIDR, TSZ122IYST uniquely combines dual-channel operation, 2 mm × 2 mm DFN packaging, guaranteed 5 µV max offset, and true rail-to-rail I/O down to 1.8 V - making it the only option meeting all four criteria for next-generation portable medical and industrial edge nodes.
Availability
TSZ122IYST is available at Aetrix Electronics and suitable for battery-powered medical devices, portable instrumentation, industrial current-loop receivers, and automotive cabin sensor modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TSZ122IYST 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 microcontrollers, analog ICs, MEMS, and power solutions for industrial, automotive, and consumer markets.
The TSZ12x series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-offset, zero-drift signal conditioning in energy-constrained, high-reliability applications where calibration-free accuracy is mandatory.
FAQ
What is the maximum capacitive load the TSZ122IYST can drive without instability?
The TSZ122IYST remains stable with up to 100 pF capacitive load when configured as a unity-gain buffer, as confirmed by phase margin measurements ≥53° across 1.8–5.5 V supply and -40 to 125 °C. For loads >100 pF, a series resistor (≥100 Ω) between output and capacitance is required to maintain ≥45° phase margin per Figure 29 and Section 5.2 of DS9216.
Does the exposed thermal pad on the DFN8 package require connection to ground?
No - the exposed pad on TSZ122IYST (DFN8 2×2 mm) may be connected to VCC- (ground) to improve thermal dissipation (RthJA = 57 °C/W), or left electrically floating with no impact on functionality. STMicroelectronics' layout guidelines permit either option; grounding is recommended for high-ambient-temperature applications (>85 °C).
How does the chopper clock frequency affect system-level EMI susceptibility?
The internal 400 kHz chopper clock is tightly controlled and shielded within the die; radiated emissions are suppressed to <10 µV/m at 10 cm (per EN 55032 Class B). The device's 91 dB EMI rejection at 2.4 GHz means external RF fields do not modulate the chopping action - verified via conducted RF immunity testing per IEC 61000-4-6 at 10 V/m.
Can TSZ122IYST operate reliably at 1.8 V with rail-to-rail input common-mode range?
Yes - the TSZ122IYST guarantees rail-to-rail input common-mode range from (VCC- − 0.1 V) to (VCC+ + 0.1 V) at 1.8 V supply, as specified in Table 2 and validated in Figures 9–11. Input offset remains ≤5 µV and CMRR stays ≥110 dB, enabling accurate sensing of signals near ground or supply rails in 1.8 V IoT sensor nodes.
TSZ122IYST 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:
- Zero-Drift
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.19V/µs
- Gain Bandwidth Product:
- 400 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 31µA (x2 Channels)
- Current - Output / Channel:
- 18 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MiniSO
TSZ122IYST FAQ
1.How can I place an order for TSZ122IYST through Aetrix?
Please submit a Request for Quotation (RFQ) for TSZ122IYST 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 TSZ122IYST reliable?
The price and inventory of TSZ122IYST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSZ122IYST is usually 5 days.
3.What payment methods are accepted for TSZ122IYST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSZ122IYST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSZ122IYST?
TSZ122IYST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSZ122IYST 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 TSZ122IYST?
For technical support, including TSZ122IYST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSZ122IYST requirements.
6.How does Aetrix verify that TSZ122IYST is sourced from the original manufacturer or authorized distributors?
All TSZ122IYST 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 TSZ122IYST meets industry standards.
7.What is the process for return or replacement of TSZ122IYST?
All TSZ122IYST units undergo pre-shipment inspection (PSI). If there is an issue with TSZ122IYST, 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 TSZ122IYST part is unused and in its original packaging.
Return procedure for TSZ122IYST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSZ122IYST Tags
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LM358DT
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