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Analog Devices Inc. AD680JTZ
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- Part No.:
- AD680JTZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
AD680JTZ.pdf
- Description:
- IC VREF SERIES 0.4% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:247
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Product details
Overview
AD680JTZ from Analog Devices is a precision 2.5 V band gap voltage reference in TO-92 package, delivering ±10 mV initial accuracy (±0.4%), 30 ppm/°C max temperature coefficient over 0°C to 70°C, 250 μA max quiescent current, and 8 μV p-p low-frequency noise (0.1 Hz–10 Hz). It serves as a stable external reference for low-power ADCs and DACs in battery-operated instrumentation.
For engineers reviewing the AD680JTZ datasheet, AD680JTZ pinout, AD680JTZ application, or AD680JTZ equivalent, key selection criteria include its TO-92 footprint compatibility with legacy 2-terminal references, guaranteed 0°C to 70°C operation, low 250 μA supply current, and absence of temperature output pin - distinguishing it from 8-lead PDIP/SOIC variants.
Technical Context
The AD680JTZ implements a patented merged band gap core and amplifier architecture, enabling high dc accuracy without external trimming components. Its laser-trimmed thin-film resistors set both initial output voltage and temperature coefficient, achieving 2.5 V ±10 mV at 25°C and ≤30 ppm/°C drift across its full operating range.
Unlike 8-lead versions, the AD680JTZ omits the TEMP pin and test points (TP), reducing pin count to three (+VIN, VOUT, GND) and simplifying integration into space-constrained, cost-sensitive designs where temperature sensing is unnecessary.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±10 mV (±0.4%) at 25°C - ensures direct compatibility with 2.5 V ADC/DAC reference inputs without calibration. |
| Temp Coefficient | 30 ppm/°C max (0°C to 70°C) - guarantees ≤0.75 mV total drift over full grade range, suitable for industrial-grade metering. |
| Quiescent Current | 250 μA max - enables >1-year battery life in 10 mA-hr coin-cell applications when powering low-duty-cycle sensors. |
| Low-Frequency Noise | 8 μV p-p (0.1 Hz–10 Hz) - supports 16-bit+ resolution in precision data acquisition without added filtering. |
| Line Regulation | 40 μV/V (4.5 V–36 V input) - maintains stability across wide input rails, ideal for unregulated battery or adapter supplies. |
| Load Regulation | 100 μV/mA (0–10 mA load) - sustains accuracy under dynamic loads typical of SAR ADC reference switching. |
| Capacitive Load | 50 nF max - allows direct buffering with standard op amps without phase-margin risk. |
Pinout & Package
AD680JTZ uses a 3-pin TO-92 plastic header-style package (JEDEC TO-226AA), with leads arranged linearly: Pin 1 = +VIN, Pin 2 = VOUT, Pin 3 = GND (bottom view). No internal test points or temperature output pin - optimized for minimal footprint and lowest BOM cost among AD680 family variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VIN (Pin 1) | Input Supply Connection | Accepts 4.5 V–36 V; requires 0.1 μF bypass capacitor to GND for stability and noise rejection. |
| VOUT (Pin 2) | Precision Reference Output | Delivers regulated 2.5 V ±10 mV; drives up to 10 mA; sensitive to capacitive loading beyond 50 nF. |
| GND (Pin 3) | Analog Ground Reference | Must connect directly to system ground plane; carries ~250 μA return current - avoid shared traces with digital returns. |
Key Features
| Feature | Design Value |
|---|---|
| TO-92 Package Integration | Enables drop-in replacement for discrete 2-terminal shunt references while providing superior 2.5 V accuracy and lower tempco. |
| Laser-Trimmed Stability | Eliminates need for external calibration or trim pots - reduces assembly steps and long-term drift in field-deployed equipment. |
| Ultra-Low Quiescent Current | 250 μA max allows use in always-on sensor nodes powered by primary lithium cells with multi-year lifetime. |
| Low 0.1–10 Hz Noise | 8 μV p-p enables high-resolution DC measurements (e.g., strain gauges, thermocouples) without post-processing averaging. |
| Wide Input Range | 4.5 V–36 V operation supports direct connection to 5 V logic rails, 9 V batteries, or 24 V industrial buses without regulators. |
Applications
| Portable Digital Multimeter | Battery-Powered Data Logger |
|---|---|
Use Scenario: Handheld DMM measuring DC voltage with 4½-digit resolution and auto-ranging. IC Role / Device Role / Timing Role: Primary 2.5 V reference for dual-slope or sigma-delta ADC, defining full-scale accuracy and linearity. Use Value: 30 ppm/°C tempco ensures <±0.01% reading error across 0–40°C handheld operating range without warm-up delay. |
Use Scenario: Remote environmental sensor node logging temperature/humidity every 5 minutes using coin-cell power. IC Role / Device Role / Timing Role: Reference for low-power SAR ADC sampling analog sensor outputs during brief active periods. Use Value: 250 μA quiescent current extends CR2032 battery life to >2 years at 1% duty cycle, outperforming most 3-terminal alternatives. |
| Industrial Panel Meter | Medical Patient Monitor Front-End |
Use Scenario: DIN-rail mounted 0–10 V analog input module converting process signals for PLC interface. IC Role / Device Role / Timing Role: Stable reference for isolated 16-bit ADC capturing 4–20 mA loop signals with galvanic separation. Use Value: 40 μV/V line regulation prevents gain error when powered from noisy 24 V DC industrial bus with ±10% ripple. |
Use Scenario: Portable ECG device acquiring biopotential signals with 16-bit resolution and <5 μV RMS noise floor. IC Role / Device Role / Timing Role: Low-noise reference for precision instrumentation amplifier and ADC signal chain. Use Value: 8 μV p-p (0.1–10 Hz) noise contributes <0.5 LSB error in 16-bit conversion, meeting IEC 60601-2-27 low-noise requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF02CP | 2.5 V ±12 mV initial accuracy, 50 ppm/°C tempco, 8-pin PDIP only - no TO-92 option. | Higher drift limits use in 0–70°C portable gear requiring <1 mV total error budget. | Select REF02CP only if existing PCB layout accommodates 8-pin DIP and higher tempco is acceptable. |
| LM385BZ-2.5 | 2.5 V shunt reference, 1% initial accuracy (±25 mV), 100 ppm/°C, 20 μA typical IQ - TO-92 compatible but less precise. | Lacks series topology; requires external current-setting resistor and suffers higher noise (20 μV p-p). | Choose LM385BZ-2.5 only for ultra-low-cost, non-critical applications where ±1% reference error is tolerable. |
Compared with REF02CP and LM385BZ-2.5, the AD680JTZ delivers tighter initial accuracy and lower temperature drift in the same TO-92 package, making it the optimal choice for cost-sensitive, battery-powered systems demanding 16-bit ADC performance without layout redesign.
Availability
AD680JTZ is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and industrial panel meters requiring stable component supply with consistent TO-92 sourcing and Pb-free compliance.
Supply support for AD680JTZ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving precision measurement, industrial automation, and medical electronics markets.
The AD680 product line delivers low-power, laser-trimmed band gap voltage references optimized for data converter accuracy in space- and energy-constrained systems - with AD680JTZ specifically targeting cost-driven, single-supply portable applications.
FAQ
What is the operating temperature range for the AD680JTZ?
The AD680JTZ is specified for operation from 0°C to +70°C, with guaranteed performance including ±10 mV initial accuracy and ≤30 ppm/°C temperature coefficient across this range. It does not support extended −40°C to +85°C operation like the AD680AN or AD680AR grades. This makes the AD680JTZ ideal for commercial-grade portable equipment where ambient conditions remain within room-temperature bounds.
Does the AD680JTZ include a temperature output pin?
No, the AD680JTZ does not include a temperature output pin. Unlike the 8-lead PDIP and SOIC versions (e.g., AD680AN, AD680AR), the TO-92 packaged AD680JTZ has only three terminals: +VIN, VOUT, and GND. The TEMP pin is physically absent - a deliberate design choice to minimize package size and cost for applications where temperature sensing is handled separately.
What is the maximum capacitive load the AD680JTZ can drive?
The AD680JTZ is stable with up to 50 nF of capacitive load on its VOUT pin, as specified in the datasheet. Exceeding this value risks oscillation or degraded transient response. For driving larger loads (e.g., ADC reference inputs with internal sampling capacitors), a series resistor (1–10 Ω) or dedicated buffer amplifier is required to maintain stability and preserve low-noise performance.
Can the AD680JTZ be used with a 3.3 V supply?
No, the AD680JTZ requires a minimum input voltage of 4.5 V to regulate properly. Its architecture needs headroom above the 2.5 V output to sustain bias currents and internal circuit operation. Using a 3.3 V supply will result in dropout and unregulated output. For 3.3 V systems, consider the AD1582 (2.5 V LDO reference) or similar low-input-voltage alternatives.
Is the AD680JTZ RoHS-compliant and Pb-free?
Yes, the AD680JTZ is a Pb-free part, indicated by the "Z" suffix in its ordering code per Analog Devices' packaging nomenclature. It complies with RoHS Directive 2011/65/EU and is suitable for environmentally regulated commercial and industrial applications requiring lead-free assembly processes.
AD680JTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 10µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.5V ~ 36V
- Current - Supply:
- 280µA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
AD680JTZ FAQ
1.How can I place an order for AD680JTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD680JTZ 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 AD680JTZ reliable?
The price and inventory of AD680JTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD680JTZ is usually 5 days.
3.What payment methods are accepted for AD680JTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD680JTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD680JTZ?
AD680JTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD680JTZ 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 AD680JTZ?
For technical support, including AD680JTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD680JTZ requirements.
6.How does Aetrix verify that AD680JTZ is sourced from the original manufacturer or authorized distributors?
All AD680JTZ 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 AD680JTZ meets industry standards.
7.What is the process for return or replacement of AD680JTZ?
All AD680JTZ units undergo pre-shipment inspection (PSI). If there is an issue with AD680JTZ, 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 AD680JTZ part is unused and in its original packaging.
Return procedure for AD680JTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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