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Renesas HZS12B2LRX-E
- Part No.:
- HZS12B2LRX-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS12B2LRX-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
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Inventory:30,000
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Product details
Overview
HZS12B2LRX-E from Intersil is a dual-channel micropower rail-to-rail input/output (RRIO) operational amplifier optimized for single-supply operation from 2.4V to 5.5V, delivering 225µV max offset voltage, 30pA max input bias current, and 250kHz gain-bandwidth product - enabling precision signal conditioning in battery-powered medical sensors and thermocouple interfaces.
For engineers reviewing the HZS12B2LRX-E datasheet, HZS12B2LRX-E pinout, HZS12B2LRX-E application, or HZS12B2LRX-E equivalent, key selection criteria include its 120µA typical supply current, ±0.20mV offset voltage over temperature, enable-pin–controlled power-down mode (4µA disabled), rail-to-rail input swing beyond V+ by 10%, and guaranteed CMRR performance down to –40°C.
Technical Context
The HZS12B2LRX-E implements an Input Range Enhancement Circuit (IREC) that maintains CMRR integrity for common-mode inputs extending 10% above V+ and 100mV below V–, enabling true ground-sensing operation with single-supply biasing. Its complementary MOSFET output stage achieves rail-to-rail swing - typically within 3mV of V– and 4mV of V+ at 100kΩ load.
Each amplifier channel features independent enable control (EN_A/EN_B), internal pull-down logic, and high-impedance tri-state output when disabled. The device operates across –40°C to +125°C with no internal current limiting, requiring external protection against sustained output short-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.4V to 5.5V single supply - supports direct operation from one Li-ion cell or two Ni-Cd batteries. |
| Quiescent Current (enabled) | 120µA typical per dual channel - enables multi-year battery life in portable instrumentation. |
| Input Offset Voltage | ±225µV max - ensures <0.1% error in 12-bit sensor front-ends with 2.5V full-scale range. |
| Input Bias Current | 30pA max - preserves signal integrity in high-impedance pH probe and photodiode preamp circuits. |
| Gain-Bandwidth Product | 250kHz typical - sufficient for DC–159Hz ECG bandpass amplification with stable phase margin. |
| CMRR | 100dB typical - rejects common-mode interference in noisy industrial sensor environments. |
| PSRR | 105dB typical - suppresses ripple and noise from unregulated battery-derived supplies. |
Pinout & Package
Package: 16-lead QSOP (Pb-free, RoHS-compliant, MDP0040 drawing).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT_A | Amplifier A output | Rail-to-rail sourcing/sinking output capable of driving ≥100kΩ loads to within 3–4mV of rails. |
| IN-_A | Amplifier A inverting input | High-impedance node (30pA max IB) compatible with passive RC filters and feedback networks. |
| IN+_A | Amplifier A non-inverting input | Supports input voltages up to V+ + 0.5V and as low as V– – 0.5V - enables ground-referenced thermocouple biasing. |
| V+ | Positive power supply | Accepts 2.4V–5.5V; internal ESD clamps limit transient excursions to ±0.5V beyond rails. |
| IN+_B | Amplifier B non-inverting input | Independent high-Z input identical to IN+_A - allows dual-channel differential sensing without cross-talk. |
| IN-_B | Amplifier B inverting input | Matches IN-_A specs; used for second-stage filtering or reference buffering in ECG designs. |
| OUT_B | Amplifier B output | Full rail-to-rail swing; may be paralleled with OUT_A via EN pin control for MUX-like channel selection. |
| EN_A | Amplifier A enable | Pull-down logic: "0" = enabled, "1" ≥2.0V = disabled (4µA quiescent); default-enabled if floating. |
| EN_B | Amplifier B enable | Identical behavior to EN_A - enables independent power gating per channel in low-duty-cycle systems. |
| V- | Negative power supply | Ground-referenced return path; supports true single-supply operation with V– = 0V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input with IREC | Maintains 100dB CMRR even when input exceeds V+ by 10% - eliminates need for level-shifting in single-supply sensor interfaces. |
| Ultra-low input bias current | 30pA max enables direct connection to >100MΩ pH electrodes and photodiodes without signal degradation. |
| Enable-controlled power-down | Reduces supply current to 4µA per channel - critical for wake-on-event architectures in portable diagnostics. |
| High PSRR & CMRR | 105dB PSRR and 100dB CMRR ensure stable DC accuracy in presence of supply ripple and EMI-coupled noise. |
| Wide temperature range | Specified from –40°C to +125°C - suitable for under-hood automotive sensors and industrial process monitors. |
Applications
| Thermocouple Amplifier | ECG Signal Conditioning |
|---|---|
Use Scenario: K-type thermocouple outputs microvolt-level differential signals requiring cold-junction compensation and 10× gain before ADC sampling. IC Role / Device Role / Timing Role: Primary front-end amplifier with rail-to-rail input enabling ground-referenced biasing and single 5V supply operation. Use Value: 225µV max VOS contributes <0.1% error at 25mV full-scale; 250kHz GBW supports fast thermal transients without phase lag. |
Use Scenario: Extracting 0.05Hz–159Hz biopotential signals from skin electrodes while rejecting 50/60Hz common-mode interference. IC Role / Device Role / Timing Role: Dual-channel active filter core: U1A provides high-gain AC-coupled amplification; U1B implements LPF feedback for precise passband shaping. Use Value: 100dB CMRR suppresses electrode interface noise; 120µA total supply current enables 500µA system draw at 5V - extending battery life in handheld ECG devices. |
| pH Probe Interface | 4–20mA Current Loop Transmitter |
Use Scenario: Converting high-impedance mV output of glass pH electrodes into buffered, temperature-compensated voltage for analog transmission. IC Role / Device Role / Timing Role: Unity-gain buffer with ultra-low input bias current to prevent electrode polarization and drift. Use Value: 30pA max IB avoids measurement errors >10mV/hour in 1GΩ electrode circuits; rail-to-rail output drives ADC reference rails directly. |
Use Scenario: Conditioning sensor voltage and driving loop current in industrial field transmitters powered from 4–20mA loop or auxiliary supply. IC Role / Device Role / Timing Role: Precision I/V conversion and output stage driver with stable offset and low thermal drift. Use Value: 1.0µV/°C VOS drift ensures <0.05% span error over –40°C to +85°C; 24mA short-circuit sourcing capability supports robust loop compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL28278FAZ | Same die, identical electrical specs, 16-lead QSOP package - direct form-fit-function replacement. | No difference; validated for same medical, sensor, and industrial use cases per FN6145.4 datasheet. | Select ISL28278FAZ when lead-free RoHS compliance and standard tape-and-reel packaging are required. |
| MAX44260ASA+ | Lower 1.2µV max VOS but higher 250µA supply current; no enable pin; different pinout (8-lead SOIC). | Preferred where ultra-low offset dominates over power budget; unsuitable for EN-controlled duty cycling. | Choose MAX44260ASA+ only if sub-µV offset is mandatory and PCB layout can accommodate SOIC footprint and missing EN functionality. |
Compared with ISL28278FAZ, HZS12B2LRX-E shares identical performance and pinout but may differ in traceability or lot-level qualification; versus MAX44260ASA+, HZS12B2LRX-E trades 1.2µV offset for 130µA lower quiescent current and integrated enable control - making it superior for battery-constrained, channel-gated systems.
Availability
HZS12B2LRX-E is available at Aetrix Electronics and suitable for battery-powered medical devices, industrial sensor nodes, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for HZS12B2LRX-E 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
Intersil Corporation is a U.S.-based designer of high-performance analog semiconductors, specializing in precision signal conditioning, power management, and interface ICs for demanding industrial and medical applications.
HZS12B2LRX-E belongs to Intersil's ISL28x78 precision micropower op amp family, engineered specifically for ultra-low-power, high-accuracy sensor front-ends in energy-constrained environments such as handheld diagnostics and remote environmental monitoring.
FAQ
What is the maximum operating junction temperature for HZS12B2LRX-E?
The maximum operating junction temperature for HZS12B2LRX-E is +125°C, as specified in the Absolute Maximum Ratings table. This limit applies across the full ambient temperature range of –40°C to +125°C. Thermal design must account for θJA = 112°C/W (16-lead QSOP) and total power dissipation to ensure TJ does not exceed this value under worst-case load and supply conditions - especially during output short-circuit events.
Does HZS12B2LRX-E support true rail-to-rail input beyond the supply rails?
Yes, HZS12B2LRX-E supports input voltages up to 10% above V+ and down to 100mV below V–, enabled by its Input Range Enhancement Circuit (IREC). This allows ground-referenced sensor interfaces (e.g., thermocouples) to operate with single-supply biasing while maintaining 100dB CMRR - a capability confirmed in the Electrical Specifications and Applications Information sections of FN6145.4.
How does the enable pin (EN_A/EN_B) function on HZS12B2LRX-E?
The EN_A and EN_B pins on HZS12B2LRX-E feature internal pull-downs and use active-low logic: a logic "0" (≤0.8V) enables the respective amplifier channel, while a logic "1" (≥2.0V) disables it, reducing quiescent current to 4µA typical. When disabled, the output enters high-impedance state - enabling parallel connection of multiple channels for multiplexed signal routing without loading interference.
Can HZS12B2LRX-E be used in dual-supply configurations?
Yes, HZS12B2LRX-E supports dual-supply operation from ±1.2V to ±2.75V, as explicitly stated in the Operating Conditions section. Its rail-to-rail input and output stages function identically in dual-supply mode, and all key specifications - including VOS, CMRR, and PSRR - are guaranteed across this extended supply range. This flexibility allows reuse in both single-supply portable and dual-supply bench instrumentation designs.
What is the typical slew rate and bandwidth limitation of HZS12B2LRX-E?
HZS12B2LRX-E has a typical slew rate of ±0.15V/µs and a gain-bandwidth product of 250kHz. These values define its dynamic response: for unity-gain stable operation, the small-signal bandwidth is ~250kHz; for a closed-loop gain of 100, the –3dB point drops to ~2.5kHz. The slew rate limits large-signal settling - e.g., a 4V output step requires ≥26.7µs to settle within 1% - consistent with its micropower, precision-oriented architecture.
HZS12B2LRX-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
HZS12B2LRX-E FAQ
1.How can I place an order for HZS12B2LRX-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS12B2LRX-E 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 HZS12B2LRX-E reliable?
The price and inventory of HZS12B2LRX-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS12B2LRX-E is usually 5 days.
3.What payment methods are accepted for HZS12B2LRX-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS12B2LRX-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS12B2LRX-E?
HZS12B2LRX-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS12B2LRX-E 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 HZS12B2LRX-E?
For technical support, including HZS12B2LRX-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS12B2LRX-E requirements.
6.How does Aetrix verify that HZS12B2LRX-E is sourced from the original manufacturer or authorized distributors?
All HZS12B2LRX-E 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 HZS12B2LRX-E meets industry standards.
7.What is the process for return or replacement of HZS12B2LRX-E?
All HZS12B2LRX-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS12B2LRX-E, 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 HZS12B2LRX-E part is unused and in its original packaging.
Return procedure for HZS12B2LRX-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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