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STMicroelectronics TSZ122IYDT
- Part No.:
- TSZ122IYDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TSZ122IYDT.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,779
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Product details
Overview
TSZ122IYDT from STMicroelectronics is a dual high-precision chopper-stabilized operational amplifier optimized for ultra-low-offset, rail-to-rail I/O signal conditioning in battery-powered systems. It delivers 5 µV max input offset voltage at 25 °C, 8 µV over –40 °C to 125 °C, 400 kHz gain bandwidth, and 40 µA max supply current per amplifier at 5 V - enabling precision sensor front-ends in portable medical devices and low-power instrumentation.
For engineers reviewing the TSZ122IYDT datasheet, TSZ122IYDT pinout, TSZ122IYDT application, or TSZ122IYDT equivalent, this page provides verified electrical specifications, package-specific terminal mapping (DFN8 2×2), real-world use cases in medical and portable electronics, and validated alternative parts with documented functional trade-offs.
Technical Context
The TSZ122IYDT implements a 400 kHz chopper-stabilized architecture with synchronous modulation/demodulation at 400 kHz, eliminating 1/f noise and achieving near-zero input offset drift (10–30 nV/°C). Its CMOS input stage enables ultra-low input bias current (70–300 pA) across temperature and supply voltage (1.8–5.5 V).
Rail-to-rail input common-mode range (VCC– – 0.1 V to VCC+ + 0.1 V) and output swing (≤ 30 mV from rails at 25 °C) support full dynamic range utilization in single-supply systems. EMI rejection exceeds 84 dB up to 2.4 GHz, and PSRR remains >120 dB at DC, making it suitable for noisy embedded environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input offset voltage | 5 µV max at 25 °C; ensures ≤0.5 mV error in 100× gain sensor amplifiers without calibration |
| Offset drift | 10–30 nV/°C; maintains <1 µV total drift over –40 °C to 125 °C for stable long-term measurements |
| Supply voltage range | 1.8–5.5 V; supports direct operation from Li-ion (3.0–4.2 V), coin cell (1.8–3.0 V), and regulated 3.3/5 V rails |
| Supply current per amp | 40 µA max at 5 V; enables >1-year battery life in always-on wearable sensors drawing <100 µA total |
| Gain bandwidth product | 400 kHz; sufficient for DC–100 Hz biomedical signals (ECG, EEG) with ≥40 dB closed-loop gain margin |
| Input bias current | 300 pA max over temperature; avoids >1 mV error when interfacing with 10 MΩ source impedances |
| CMRR | 110–136 dB; rejects >100,000:1 common-mode interference in differential sensor bridges |
Pinout & Package
TSZ122IYDT is packaged in a wettable flank DFN8 2×2 mm, 0.5 mm pitch, thermally enhanced 8-pin package with exposed thermal pad (EP) connected to VCC– or left floating per design requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (AMP1) | High-impedance node for feedback network connection; accepts rail-to-rail common-mode inputs |
| 2 | Non-inverting input (AMP1) | Direct sensor interface point; ultra-low bias current minimizes loading on high-Z sources |
| 3 | Output (AMP1) | Rail-to-rail output capable of sourcing/sinking ≥14 mA; drives 10 kΩ loads within 30 mV of rails |
| 4 | VCC– | Negative supply terminal; EP pad may be tied here for improved thermal performance (RthJA = 57 °C/W) |
| 5 | VCC+ | Positive supply terminal; operates down to 1.8 V, enabling direct connection to low-voltage microcontrollers |
| 6 | Output (AMP2) | Independent second amplifier output; identical AC/DC specs to AMP1 for dual-channel signal chains |
| 7 | Non-inverting input (AMP2) | Second sensor input channel; matched offset and drift enable ratiometric or differential configurations |
| 8 | Inverting input (AMP2) | Second feedback node; pin-compatible with industry-standard dual op-amp layouts (e.g., MiniSO8) |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | 400 kHz modulation clock cancels 1/f noise and drift, delivering true DC precision without external trimming |
| Rail-to-rail I/O | Full input range (VCC– – 0.1 V to VCC+ + 0.1 V) and output swing (≤30 mV from rails) maximize dynamic range in 1.8–5.5 V systems |
| Ultra-low power | 40 µA per amplifier at 5 V enables dual-channel precision amplification within 100 µA total system budget |
| High EMI immunity | 84–91 dB EMI rejection (400 MHz–2.4 GHz) prevents RF-induced errors in wireless-connected medical wearables |
| Extended temperature range | Specified from –40 °C to 125 °C; supports operation inside sealed enclosures or automotive cabin environments |
Applications
| ECG Front-End Amplifier | Portable Blood Glucose Meter |
|---|---|
|
Use Scenario: Amplifies microvolt-level biopotential signals from dry electrodes in compact, battery-powered ECG patches. IC Role / Device Role / Timing Role: Dual-channel precision instrumentation amplifier core - one channel for lead-I differential sensing, second for right-leg drive (RLD) reference generation. Use Value: 5 µV offset and 30 nV/°C drift ensure baseline stability over 72-hour monitoring; 40 µA quiescent current extends CR2032 battery life beyond 14 days. |
Use Scenario: Condition analog current output from electrochemical glucose test strips in handheld meters. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with programmable gain, converting pA-level strip current into accurate mV-scale voltage. Use Value: 300 pA max input bias current prevents >1% measurement error with 10 MΩ strip impedance; rail-to-rail output interfaces directly with 12-bit SAR ADCs. |
| Wireless Sensor Node Signal Chain | Industrial Temperature Transmitter |
|
Use Scenario: Signal conditioning stage for MEMS pressure/humidity sensors in LoRaWAN-enabled environmental monitors. IC Role / Device Role / Timing Role: Dual amplifier: first for sensor excitation and bridge completion, second for filtered output buffering before RF transceiver ADC input. Use Value: 400 kHz GBP supports anti-alias filtering up to 100 Hz; 120 dB CMRR rejects switching noise from integrated DC-DC converters. |
Use Scenario: Precision amplification of RTD or thermistor voltage in 4–20 mA loop-powered transmitters operating in harsh industrial cabinets. IC Role / Device Role / Timing Role: Low-drift gain stage preceding voltage-to-current conversion; operates from 3.3 V auxiliary rail derived from loop power. Use Value: 8 µV max offset over –40 °C to 125 °C eliminates need for factory calibration; 136 dB PSRR suppresses ripple from unregulated loop supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, low-power op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Higher offset drift (100 nV/°C), lower GBP (350 kHz), same 1.8 V min supply | Less stable over wide temperature swings; requires recalibration in uncontrolled environments | Prefer TSZ122IYDT where long-term DC accuracy >100 ppm is required without software correction |
| MCP6V82-E/SN | Higher quiescent current (60 µA), wider offset spec (25 µV max), same DFN8 package | Shorter battery life and reduced resolution in sub-µV sensor applications | Choose TSZ122IYDT when ultra-low offset and micropower coexist as non-negotiable requirements |
Compared with OPA2333AIDR and MCP6V82-E/SN, TSZ122IYDT uniquely combines 5 µV offset, 30 nV/°C drift, and 40 µA consumption - enabling calibration-free, decade-long stability in portable medical and industrial sensing without sacrificing battery runtime.
Availability
TSZ122IYDT is available at Aetrix Electronics and suitable for battery-powered medical devices, portable instrumentation, precision sensor interfaces, and industrial temperature transmitters requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for TSZ122IYDT 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The TSZ12x series belongs to ST's precision analog portfolio, engineered specifically for zero-drift, micropower signal conditioning in space-constrained, battery-operated equipment where calibration overhead and thermal drift must be eliminated at the hardware level.
FAQ
What is the maximum capacitive load the TSZ122IYDT can drive while maintaining stability?
The TSZ122IYDT is unity-gain stable with capacitive loads up to 100 pF when driving a 10 kΩ resistive load, as confirmed by phase margin ≥53° across all supply voltages (1.8–5.5 V) and temperatures (–40 °C to 125 °C). For loads >100 pF, a series resistor (≥100 Ω) between amplifier output and capacitor is required to preserve 50°+ phase margin and prevent overshoot.
Does the DFN8 2×2 package require special PCB layout considerations for thermal performance?
Yes - the exposed thermal pad (EP) must be soldered to a minimum 25 mm² copper pour connected to VCC– to achieve the specified RthJA of 57 °C/W. Thermal vias (≥4 × 0.3 mm) under the EP are mandatory; insufficient copper area or missing vias increase junction temperature by >25 °C at full 40 µA per amplifier, risking long-term parameter shift.
Can TSZ122IYDT be used in single-supply configurations with input signals near ground?
Yes - its rail-to-rail input stage operates down to VCC– – 0.1 V, allowing direct interface with 0 V-referenced sensors (e.g., thermistors, bridge outputs) when VCC– = 0 V. Input common-mode range extends to VCC+ + 0.1 V, supporting overvoltage-tolerant designs without external clamping diodes.
How does the chopper frequency affect system-level EMI susceptibility?
The internal 400 kHz chopper clock is tightly controlled and shielded; radiated emissions remain below CISPR-22 Class B limits. However, external 400 kHz–800 kHz noise sources (e.g., switching regulators) may mix with the chopper frequency, causing intermodulation distortion. Layout best practice: keep chopper-sensitive nodes >5 mm from 400 kHz traces and use local 100 nF ceramic decoupling at VCC+.
TSZ122IYDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
TSZ122IYDT FAQ
1.How can I place an order for TSZ122IYDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSZ122IYDT 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 TSZ122IYDT reliable?
The price and inventory of TSZ122IYDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSZ122IYDT is usually 5 days.
3.What payment methods are accepted for TSZ122IYDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSZ122IYDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSZ122IYDT?
TSZ122IYDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSZ122IYDT 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 TSZ122IYDT?
For technical support, including TSZ122IYDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSZ122IYDT requirements.
6.How does Aetrix verify that TSZ122IYDT is sourced from the original manufacturer or authorized distributors?
All TSZ122IYDT 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 TSZ122IYDT meets industry standards.
7.What is the process for return or replacement of TSZ122IYDT?
All TSZ122IYDT units undergo pre-shipment inspection (PSI). If there is an issue with TSZ122IYDT, 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 TSZ122IYDT part is unused and in its original packaging.
Return procedure for TSZ122IYDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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