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Diodes Incorporated AZV831KTR-G1
- Part No.:
- AZV831KTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AZV831KTR-G1.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,429
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Product details
Overview
AZV831KTR-G1 from BCD Semiconductor Manufacturing Limited is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for ultra-low-power, low-voltage sensor signal conditioning. It delivers 1 pA typical input bias current, 0.5 mV typical input offset voltage, and 1 MHz gain-bandwidth product across 1.6 V to 5.5 V supply operation - enabling precision photodiode amplification and battery-powered medical instrumentation such as pulse oximeters.
For engineers reviewing the AZV831KTR-G1 datasheet, AZV831KTR-G1 pinout, AZV831KTR-G1 application, or AZV831KTR-G1 equivalent, key selection criteria include its sub-70 µA per-channel quiescent current, rail-to-rail output swing within 4 mV of rails (10 kΩ load), and guaranteed operation down to 1.6 V single supply - critical for space-constrained, energy-sensitive analog front-ends.
Technical Context
The AZV831KTR-G1 employs a CMOS input stage with Class AB output stage to achieve simultaneous rail-to-rail input common-mode range (–0.3 V to VCC + 0.3 V) and rail-to-rail output swing. Its 1 pA input bias current enables high-impedance transducer interfacing without significant error from leakage paths.
It features unity-gain stability with 67° phase margin at 100 kΩ load, supports dual-supply (±0.8 V to ±2.5 V) or single-supply operation, and maintains <2.5 mV max input offset voltage over –40°C to +85°C ambient temperature - ensuring consistent DC accuracy in portable health monitoring systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6 V to 5.5 V single supply - supports direct integration into Li-ion, coin-cell, and 3.3 V/5 V systems without level-shifting. |
| Input Bias Current | 1 pA typical - minimizes voltage error in high-Z sensor nodes (e.g., photodiodes, piezoelectric elements). |
| Input Offset Voltage | 0.5 mV typical / 2.5 mV max - ensures ≤0.1% gain error in 5 V full-scale instrumentation amplifiers. |
| Gain-Bandwidth Product | 1.0 MHz - enables stable closed-loop operation up to 100 kHz with G = 10, suitable for DC-coupled biosignal acquisition. |
| Supply Current per Channel | 70 µA typical - allows >10-year battery life in continuous-sensing applications using CR2032 cells. |
| Rail-to-Rail Output Swing | 4 mV from rail (10 kΩ load) - maximizes dynamic range in low-voltage ADC interfaces (e.g., 12-bit SAR at 3.3 V). |
| Slew Rate | 0.45 V/µs at VCC = 5.0 V - supports clean 100 kHz sine-wave output with <1% distortion at 1 VPP. |
Pinout & Package
AZV831KTR-G1 is housed in a RoHS-compliant, green SOT-23-5 package (5-pin, 2.9 mm × 1.6 mm × 1.1 mm body). The package supports reflow soldering per JEDEC J-STD-020 and offers thermal resistance θJA = 220°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN–) | Inverting Input | High-impedance CMOS node; accepts signals from –0.3 V to VCC + 0.3 V - enables true rail-to-rail differential input staging. |
| 2 (IN+) | Non-inverting Input | Matches IN– in bias current and offset; used for reference-based sensing (e.g., bridge excitation feedback). |
| 3 (VEE) | Negative Supply / Ground | Connects to system ground in single-supply mode; supports dual-supply operation down to –0.8 V. |
| 4 (VCC) | Positive Supply | Accepts 1.6–5.5 V; internal regulation ensures stable biasing across supply variation and temperature. |
| 5 (OUTPUT) | Amplifier Output | Class AB stage drives ≥10 kΩ loads to within 4 mV of rails; capable of sourcing/sinking ≥50 mA at VCC = 3 V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical - eliminates guard-ring design requirements in photodiode TIA configurations. |
| Rail-to-rail input common-mode range | Extends 300 mV beyond supply rails at VCC = 5 V - permits direct connection to resistive sensors without external level shifters. |
| Low quiescent power | 70 µA per channel - enables multi-amplifier front-ends in wearable devices with <10 µW/channel active power budget. |
| Stable at unity gain | 67° phase margin with 100 kΩ load - eliminates need for external compensation in buffer or gain-of-one configurations. |
| Wide temperature range | Specified from –40°C to +85°C - qualified for clinical-grade portable diagnostics operating in uncontrolled ambient environments. |
Applications
| Photodiode Amplification | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Transimpedance amplification of weak photocurrents (<1 nA) from silicon photodiodes in pulse oximetry modules. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with ultra-low input bias current to prevent signal loss and offset drift. Use Value: Enables detection of sub-100 nA photocurrents with <1 mV output error - critical for SpO₂ saturation calculation accuracy. |
Use Scenario: Signal conditioning in handheld glucose meters using electrochemical test strips. IC Role / Device Role / Timing Role: Low-drift, low-power amplifier for strip current measurement and reference voltage buffering. Use Value: Delivers stable 0.5 mV offset over temperature, reducing calibration frequency and extending field service intervals. |
| Pulse Blood Oximeter | Glucose Meter |
Use Scenario: Dual-wavelength (660 nm / 940 nm) LED driver feedback and photodiode signal amplification in compact wearable oximeters. IC Role / Device Role / Timing Role: Single-supply RRIO op-amp driving ADC input with minimal headroom loss at 3.3 V rail. Use Value: Full 3.3 V ADC range utilization via 4 mV rail-to-rail swing - improves SNR by 12 dB vs. legacy 15 mV swing amplifiers. |
Use Scenario: Analog front-end for amperometric glucose sensing with disposable test strips requiring precise current measurement. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier in constant-voltage potentiostat circuitry. Use Value: 27 nV/√Hz input voltage noise and <2.5 mV offset ensure ±0.5 mg/dL glucose reading repeatability under battery voltage sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-bias-current, rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC2271IDBVR | Higher 10 pA input bias current; 1.8 MHz GBW; 125 µA supply current | Less suitable for ultra-high-Z photodiode nodes; better for higher-speed, moderate-power signal chains | Select when bandwidth >1 MHz is required and input impedance >100 MΩ is not critical |
| OPA316IDBVR | Lower 0.2 pA input bias current; 10 MHz GBW; 400 µA supply current | Over-specified bandwidth and power for battery-operated medical sensors | Select only if system requires >500 kHz closed-loop bandwidth and can accommodate 5.7× higher quiescent current |
Compared with TLC2271IDBVR and OPA316IDBVR, the AZV831KTR-G1 uniquely balances ultra-low bias current (1 pA), sub-70 µA supply current, and 1 MHz bandwidth - making it optimal for long-life, high-impedance, low-voltage medical sensor nodes where power and precision are co-constrained.
Availability
AZV831KTR-G1 is available at Aetrix Electronics and suitable for photodiode amplification, battery-powered instrumentation, and pulse blood oximeter designs requiring stable component supply, RoHS compliance, and tape-and-reel delivery for automated assembly.
Supply support for AZV831KTR-G1 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
BCD Semiconductor Manufacturing Limited is a China-based fabless analog IC designer specializing in high-performance, low-power, and cost-optimized mixed-signal solutions for consumer, industrial, and medical markets.
The AZV831 series belongs to BCD's precision analog portfolio, engineered specifically for ultra-low-power, rail-to-rail signal conditioning in portable healthcare and environmental sensing applications.
FAQ
What is the maximum capacitive load the AZV831KTR-G1 can drive stably?
The AZV831KTR-G1 maintains 67° phase margin with up to 300 pF capacitive load when configured as a unity-gain buffer with 100 kΩ feedback resistor. Driving >500 pF requires external isolation resistor (≥100 Ω) in series with the output to preserve stability - verified in Figure 24–31 of the datasheet across 0.8 V to 2.5 V dual supplies.
Does AZV831KTR-G1 support dual-supply operation?
Yes - the device operates from ±0.8 V to ±2.5 V dual supplies, with full rail-to-rail input common-mode range extending 300 mV beyond each rail at VCC = 5 V (i.e., –0.3 V to +5.3 V). Pin 3 (VEE) connects to negative supply, and pin 4 (VCC) to positive supply - confirmed in Figure 2 and Absolute Maximum Ratings table.
How does input offset voltage drift with temperature?
The AZV831KTR-G1 exhibits 2.0 µV/°C typical input offset voltage drift over –40°C to +85°C, measured across multiple production lots. This drift contributes ≤0.25 mV total offset change across the full temperature range - validated in DC electrical characteristics tables (pages 6–9) and Figure 6–11 performance curves.
Is AZV831KTR-G1 compatible with lead-free reflow profiles?
Yes - the "G1" suffix denotes RoHS-compliant, green packaging with lead-free terminations. The SOT-23-5 package is rated for JEDEC J-STD-020 moisture sensitivity level 1 and withstands peak reflow temperatures up to 260°C for 10 seconds, as specified in the Absolute Maximum Ratings table on page 5.
AZV831KTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.45V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 70µA
- Current - Output / Channel:
- 185 mA
- Voltage - Supply Span (Min):
- 1.6 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AZV831KTR-G1 FAQ
1.How can I place an order for AZV831KTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZV831KTR-G1 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 AZV831KTR-G1 reliable?
The price and inventory of AZV831KTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZV831KTR-G1 is usually 5 days.
3.What payment methods are accepted for AZV831KTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZV831KTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZV831KTR-G1?
AZV831KTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZV831KTR-G1 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 AZV831KTR-G1?
For technical support, including AZV831KTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZV831KTR-G1 requirements.
6.How does Aetrix verify that AZV831KTR-G1 is sourced from the original manufacturer or authorized distributors?
All AZV831KTR-G1 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 AZV831KTR-G1 meets industry standards.
7.What is the process for return or replacement of AZV831KTR-G1?
All AZV831KTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AZV831KTR-G1, 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 AZV831KTR-G1 part is unused and in its original packaging.
Return procedure for AZV831KTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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