TSZ121IYCT STMicroelectronics Integrated Circuit (SOT23 (5-Pin)) In Stock
TSZ121IYCT is a zero-drift micropower operational amplifier with 5 µV typical and 8 µV maximum input offset voltage for ultra-precise signal conditioning up to 5 V supply. It features 115 dB minimum CMRR and 0.0002 µA typical bias current in a 5-pin SOT23 package. Available in stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TSZ121IYCT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3700(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Zero-drift architecture with 5 µV typical offset voltage and 8 µV maximum for stable DC accuracy over time and temperature
- Ultra-low bias current of 0.0002 µA typical with 115 dB minimum CMRR for precision high-impedance sensor interfaces
- Micropower operation on a single 5 V supply in a compact 5-pin SOT23 package for space-constrained precision analog designs
Applications
TSZ121IYCT is ideal for precision DC measurement applications including thermocouple amplifiers, bridge sensor signal conditioning, and low-side current sensing where drift over temperature would introduce unacceptable measurement errors. Its 5 µV typical offset and zero-drift correction make it suitable for medical diagnostic equipment, industrial weigh scales, and precision data loggers requiring stable readings without periodic calibration. The ultra-low 0.0002 µA bias current prevents loading errors on high-impedance electrochemical and piezoelectric sensors.
Specifications
| Factory Lead Time | 14Weeks |
| YTEOL | 8 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 0.0003 µA |
| Bias Current-Max (IIB) @25C | 0.0002 µA |
| Common-mode Reject Ratio-Min | 115dB |
| Common-mode Reject Ratio-Nom | 128dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 8 µV |
| JESD-30 Code | R-PDSO-G5 |
| Low-Bias | YES |
| Micropower | YES |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP5/6,.08 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Screening Level | AEC-Q100 |
| Slew Rate-Nom | 0.19V/us |
| Supply Current-Max | 0.04mA |
| Supply Voltage Limit-Max | 6V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Unity Gain BW-Nom | 400 |
| Voltage Gain-Min | 794328.23472 |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TSZ121IYCT:
Frequently Asked Questions
What makes TSZ121IYCT suitable for thermocouple amplification compared to a standard op-amp?
The TSZ121IYCT achieves 5 µV typical input offset voltage with zero-drift correction, which is critical because thermocouple signals typically range from 10 µV to 60 µV per degree Celsius. A standard op-amp with millivolt-level offset would completely mask the thermocouple signal, while TSZ121IYCT's 8 µV maximum offset ensures less than 1°C of temperature measurement error in most thermocouple types.
How does the 0.0002 µA bias current of TSZ121IYCT minimize errors with high-impedance sensors?
With a bias current of only 0.0002 µA (0.2 nA), the voltage error across a 1 MΩ source impedance is just 0.2 mV, which is negligible for most precision applications. Higher-bias amplifiers with microampere-level currents would create errors of volts across such impedances, making TSZ121IYCT essential for pH electrodes, photodiode transimpedance stages, and electrostatic MEMS sensors.
Can TSZ121IYCT replace a chopper-stabilized op-amp in a battery-powered precision instrument?
Yes, TSZ121IYCT's zero-drift architecture provides chopper-equivalent offset stability while consuming micropower-level supply current, making it a strong replacement in battery-powered instruments. Its single 5 V supply operation and 5-pin SOT23 package reduce board area and bill-of-materials cost compared to larger-footprint chopper amplifiers that require dual supplies or bypass networks.
How does the 115 dB minimum CMRR of TSZ121IYCT benefit bridge sensor designs?
Bridge sensors such as strain gauges and pressure transducers produce small differential voltages riding on a large common-mode voltage equal to roughly half the excitation supply. With 115 dB minimum CMRR, TSZ121IYCT rejects common-mode interference by a factor of over 560,000, ensuring that a 1 V common-mode noise component contributes less than 2 µV of error to the amplified differential output.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.7360 | $0.74 |
| 250+ | $0.6800 | $170.00 |
| 500+ | $0.6400 | $320.00 |
| 1000+ | $0.6200 | $620.00 |
| 3000+ | $0.3750 | $1125.00 |
| 6000+ | $0.3700 | $2220.00 |
In Stock · 24h Response · Worldwide Shipping
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