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Analog Devices Inc. AD1580BRTZ-REEL7
- Part No.:
- AD1580BRTZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AD1580BRTZ-REEL7.pdf
- Description:
- IC VREF SHUNT 0.08% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,447
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Product details
Overview
AD1580BRTZ-REEL7 from Analog Devices is a 2-terminal shunt voltage reference delivering a precise 1.225 V output with ±1 mV initial accuracy, ±50 ppm/°C temperature drift, and 20 µV rms wideband noise (10 Hz–10 kHz). It operates from 50 µA to 10 mA reverse current and is optimized for low-power, high-accuracy data converters in portable 3 V systems.
For engineers reviewing the AD1580BRTZ-REEL7 datasheet, AD1580BRTZ-REEL7 pinout, AD1580BRTZ-REEL7 application, or AD1580BRTZ-REEL7 equivalent, key selection criteria include micropower operation at 50 µA minimum current, SOT-23-3 package compatibility with space-constrained PCBs, stability under capacitive loads, and guaranteed performance across −40°C to +85°C.
Technical Context
The AD1580BRTZ-REEL7 uses band gap architecture with proprietary curvature correction to minimize nonlinear temperature drift. Its two-transistor ΔVBE-based compensation circuit achieves zero TC by summing a positive-TC voltage with the negative-TC base-emitter voltage.
As a shunt reference, it requires an external series resistor to set reverse current and regulates by sinking excess current. It remains stable with any capacitive load and exhibits 0.4 Ω dynamic output impedance at 120 Hz with 1 mA ±100 µA excitation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; ±1 mV initial error ensures ≤0.082% absolute accuracy at +25°C for 12-bit converter reference calibration. |
| Temp Coefficient | ±50 ppm/°C max over −40°C to +85°C; contributes ≤4 mV total drift, enabling 10-bit linearity without system-level temperature compensation. |
| Min Operating Current | 50 µA; supports ultra-low-power shutdown modes in battery-powered DMMs and GPS receivers where supply current must stay below 100 µA. |
| Noise (10 Hz–10 kHz) | 20 µV rms; limits quantization noise floor in 12-bit ADCs such as AD7714-3 when used as REFIN. |
| Dynamic Output Impedance | 0.4 Ω max at 120 Hz; maintains <0.1% regulation error even with 1 mA load transients, critical for multiplying DACs like AD7945. |
| Turn-On Settling Time | 5 µs to 0.1%; enables fast wake-up in portable instruments without waiting for reference stabilization before ADC conversion. |
| ESD Rating | 4 kV HBM; protects against handling damage during SMT assembly of handheld industrial transmitters and PCMCIA cards. |
Pinout & Package
AD1580BRTZ-REEL7 is housed in a RoHS-compliant 3-lead SOT-23-3 (RT-3) package with gull-wing leads, 1.30 mm body width, and 0.95 mm height per JEDEC TO-236-AB. Pin 1 is V+, Pin 2 is V−, and Pin 3 is NC (no connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Anode (cathode of equivalent Zener) | Connected to system ground in shunt configuration; defines reference return path and thermal reference plane. |
| V− | Cathode (anode of equivalent Zener) | Connected to regulated output node; sinks reverse current to maintain 1.225 V across external load. |
| NC | No connect | Unbonded die pad; must remain floating-no trace or copper pour to avoid parasitic capacitance or leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-corrected band gap | Eliminates need for external trimming resistors; guarantees ±50 ppm/°C drift without post-calibration in production test. |
| Capacitive-load stability | Operates reliably with ≥1 µF bypass capacitors-enables direct integration into noisy switch-mode power supply rails without oscillation risk. |
| Low-frequency noise | 5 µV p-p (0.1 Hz–10 Hz); preserves DC precision in smart transmitter analog front-ends where 1/f noise dominates sensor signal chain errors. |
| Reverse voltage hysteresis | 80 µV max; ensures repeatable 1.225 V output after thermal cycling between −40°C and +85°C, critical for automotive sensor modules. |
| High ESD tolerance | 4 kV human body model rating allows safe manual handling during prototyping and rework of medical handheld devices. |
Applications
| Portable Instrumentation | Industrial Smart Transmitters |
|---|---|
|
Use Scenario: Battery-powered digital multimeter (DMM) with 12-bit SAR ADC requiring stable reference during 100-hour field operation. IC Role / Device Role / Timing Role: Shunt voltage reference providing 1.225 V REFIN to ADC, sinking variable current based on input range scaling. Use Value: 50 µA minimum operating current extends battery life beyond 200 hours; ±1 mV initial error eliminates factory calibration step. |
Use Scenario: 4–20 mA loop-powered pressure transmitter with onboard microcontroller and sigma-delta ADC. IC Role / Device Role / Timing Role: Precision reference for ratiometric sensor excitation and ADC full-scale setting in harsh industrial environments. Use Value: ±50 ppm/°C drift ensures <±0.05% FS error over −40°C to +85°C ambient, meeting IEC 61000-6-2 immunity requirements. |
| 3 V Data Converter Systems | PCMCIA & Embedded Peripherals |
|
Use Scenario: AD7714-3-based chemical analyzer using 3 V supply and measuring sub-mV electrochemical signals. IC Role / Device Role / Timing Role: Low-noise reference source for charge-balancing ADC, directly connected to REFIN(+) and REFIN(−) pins. Use Value: 20 µV rms noise prevents degradation of effective resolution below 16 bits; SOT-23 footprint fits tight layout around ADC die. |
Use Scenario: PCMCIA card with integrated GPS receiver and RF front-end requiring compact, low-power biasing. IC Role / Device Role / Timing Role: Reference generator for LNA gain control DAC and local oscillator PLL tuning voltage. Use Value: 0.4 Ω output impedance ensures <10 µV droop during 100 µA DAC code transitions; RoHS-compliant RT-3 package meets card thickness specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3412ARTZ-R7 | 1.2 V output, ±0.1% initial accuracy, 30 ppm/°C drift, 12 µV rms noise; requires ≥100 µA min current. | Better drift/noise but higher minimum current limits use in sub-100 µA sleep modes. | Select ADR3412ARTZ-R7 only if system can guarantee ≥100 µA continuous reverse current and needs tighter drift spec. |
| TLVH431ACDBVR | 1.24 V output, ±0.5% initial accuracy, 100 ppm/°C drift, 25 µV rms noise; adjustable via external resistors. | Lower accuracy and higher drift; suitable only for non-critical 8–10 bit systems with cost-sensitive BOMs. | Choose TLVH431ACDBVR only for cost-driven consumer electronics where ±1% reference error is acceptable. |
Compared with AD1580BRTZ-REEL7, ADR3412ARTZ-R7 offers superior drift and noise but sacrifices micropower capability, while TLVH431ACDBVR trades accuracy and stability for adjustability and lower unit cost-neither matches the AD1580BRTZ-REEL7's balance of 50 µA operation, ±1 mV error, and SOT-23 size for precision portable systems.
Availability
AD1580BRTZ-REEL7 is available at Aetrix Electronics and suitable for portable instrumentation, industrial smart transmitters, and 3 V data converter systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD1580BRTZ-REEL7 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, with design centers worldwide and ISO 9001-certified manufacturing.
The AD1580 product line delivers micropower shunt references for precision data acquisition in space- and power-constrained applications, targeting battery-operated test equipment, industrial sensors, and portable medical devices.
FAQ
What is the maximum reverse current rating for AD1580BRTZ-REEL7?
The absolute maximum reverse current for AD1580BRTZ-REEL7 is 25 mA per the Absolute Maximum Ratings table. Continuous operation above 10 mA is not recommended due to thermal dissipation limits in the SOT-23-3 package; typical designs maintain reverse current between 100 µA and 5 mA for optimal stability and temperature performance.
Can AD1580BRTZ-REEL7 drive a 1 µF bypass capacitor directly?
Yes, AD1580BRTZ-REEL7 is explicitly characterized for stability with any capacitive load, including 1 µF. Figure 16 in the datasheet confirms that a 1 µF capacitor reduces power supply noise coupling by >99.99%, making it ideal for noisy 3 V rail environments common in portable electronics.
Is AD1580BRTZ-REEL7 pin-compatible with AD1580ARTZ-REEL7?
Yes, AD1580BRTZ-REEL7 and AD1580ARTZ-REEL7 share identical SOT-23-3 (RT-3) pinout, package dimensions, and terminal functions. The only differences are initial accuracy (±1 mV vs. ±10 mV) and temperature coefficient (±50 ppm/°C vs. ±100 ppm/°C), allowing direct substitution where tighter specifications are required.
Does AD1580BRTZ-REEL7 require external compensation components?
No, AD1580BRTZ-REEL7 requires no external compensation. Its internal curvature-corrected band gap topology and output stage design ensure unconditional stability across its full 50 µA–10 mA operating range and with all capacitive loads, eliminating the need for series resistors or feedback networks in standard shunt configurations.
What is the turn-on settling time specification for AD1580BRTZ-REEL7?
AD1580BRTZ-REEL7 has a turn-on settling time of 5 µs to 0.1% of final value under no-load conditions, as specified in Table 1. This fast startup enables immediate ADC conversion upon power-up in battery-powered devices, avoiding delays associated with traditional buried-Zener references.
AD1580BRTZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.08%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 5µVp-p
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 50 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AD1580BRTZ-REEL7 FAQ
1.How can I place an order for AD1580BRTZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1580BRTZ-REEL7 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 AD1580BRTZ-REEL7 reliable?
The price and inventory of AD1580BRTZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1580BRTZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD1580BRTZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1580BRTZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1580BRTZ-REEL7?
AD1580BRTZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1580BRTZ-REEL7 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 AD1580BRTZ-REEL7?
For technical support, including AD1580BRTZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1580BRTZ-REEL7 requirements.
6.How does Aetrix verify that AD1580BRTZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD1580BRTZ-REEL7 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 AD1580BRTZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD1580BRTZ-REEL7?
All AD1580BRTZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD1580BRTZ-REEL7, 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 AD1580BRTZ-REEL7 part is unused and in its original packaging.
Return procedure for AD1580BRTZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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