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Analog Devices Inc. ADR127BUJZ-REEL7
- Part No.:
- ADR127BUJZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
ADR127BUJZ-REEL7.pdf
- Description:
- IC VREF SERIES 0.12% TSOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,270
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Product details
Overview
ADR127BUJZ-REEL7 from Analog Devices is a precision micropower low-dropout voltage reference IC delivering 1.25 V output with ±0.12% initial accuracy, 9 ppm/°C max temperature coefficient, and 1.45 V dropout at 0 mA load. It operates from 2.7 V to 18 V input, draws only 85 μA typical quiescent current, and is housed in a 6-lead TSOT (UJ-6) package for space-constrained battery-powered instrumentation.
For engineers reviewing the ADR127BUJZ-REEL7 datasheet, ADR127BUJZ-REEL7 pinout, ADR127BUJZ-REEL7 application, or ADR127BUJZ-REEL7 equivalent, this page provides verified electrical specifications, thermal performance data, real-world transient response characteristics, and validated alternative options for high-accuracy analog signal chains requiring stable reference voltage under wide temperature and supply variations.
Technical Context
The ADR127BUJZ-REEL7 implements a patented curvature-corrected band gap architecture that minimizes nonlinearities in output voltage vs. temperature across −40°C to +125°C. Its series-mode topology supports both sourcing (+5 mA) and sinking (−2 mA) capability without external components.
It achieves 9 μV p-p (0.1 Hz to 10 Hz) and 300 nV/√Hz (10 kHz) noise performance, with PSRR of −90 dB at 60 Hz. The device requires only a 0.1 μF output capacitor for stability and exhibits 80 μs turn-on settling time to 0.1% with 0.2 μF load capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.25 V nominal; B-grade tolerance ±0.12% ensures ≤1.5 mV absolute error at 25°C for calibration-critical circuits. |
| Tempco (Max) | 9 ppm/°C over −40°C to +125°C; contributes ≤1.13 mV drift across full range, enabling high-precision ADC/DAC biasing. |
| Dropout Voltage | 1.45 V at 0 mA; allows operation with VIN as low as 2.7 V while maintaining regulation-critical for single-cell Li-ion or 3.3 V system rails. |
| Quiescent Current | 85 μA typical; enables >10-year battery life in 10 μA-sleep systems with periodic measurement bursts. |
| Voltage Noise | 9 μV p-p (0.1–10 Hz); limits quantization uncertainty in 24-bit delta-sigma ADCs used in portable medical sensors. |
| Load Regulation | ≤400 ppm/mA sourcing; maintains <0.5 mV shift from 0 to 5 mA load, supporting variable-current sensor excitation. |
| PSRR | −90 dB at 60 Hz; rejects line-frequency interference in automotive or industrial power-supply monitoring applications. |
Pinout & Package
ADR127BUJZ-REEL7 is packaged in a 6-lead TSOT (UJ-6), measuring 2.90 mm × 1.60 mm × 0.95 mm, with exposed pad for thermal enhancement and JEDEC MO-193-AA compliance (height/thickness exceptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Must be left floating; no internal connection-tie to GND or leave unconnected per layout best practice. |
| 2 (GND) | Analog Ground Reference | Primary return path for reference current and output load; requires low-impedance connection to system AGND plane. |
| 3 (VIN) | Input Supply Terminal | Accepts 2.7 V to 18 V; input capacitor (≥0.1 μF) recommended for transient immunity in noisy environments. |
| 4 (VOUT) | Precision Output Node | Delivers regulated 1.25 V; requires mandatory 0.1 μF ceramic capacitor to ground for stability and noise filtering. |
| 5 (NC) | No Connect | Internally unconnected; must be left floating-no routing or stitching vias permitted. |
| 6 (NC) | No Connect | Internally unconnected; floating terminal-avoid PCB copper fill or trace attachment. |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-Corrected Band Gap | Reduces temperature-induced nonlinearity to ≤9 ppm/°C, eliminating need for external trimming in medical-grade thermistor interfaces. |
| Sink/Source Capability | Supports ±2 mA to ±5 mA bidirectional load current, enabling direct drive of op-amp inputs or DAC reference pins without buffer amplifiers. |
| Ultra-Low Quiescent Current | 85 μA typical draw allows integration into always-on wake-up circuits where average current budget is sub-100 μA. |
| Wide Input Range | 2.7 V to 18 V operation accommodates diverse power sources-from coin cells to industrial 12 V rails-without external regulators. |
| Extended Temperature Range | −40°C to +125°C rating qualifies for under-hood automotive sensors and downhole oilfield instrumentation. |
Applications
| Battery-Powered Instrumentation | Portable Medical Equipment |
|---|---|
Use Scenario: Handheld multimeter with auto-ranging 24-bit ADC requiring stable reference across battery discharge (2.8 V to 4.2 V). IC Role / Device Role / Timing Role: Precision voltage reference providing 1.25 V基准 for ADC internal gain calibration and offset correction. Use Value: ±0.12% initial accuracy and 9 ppm/°C tempco ensure <0.01% measurement error over full battery life and operating temperature swing. | Use Scenario: Wearable ECG monitor using low-power SAR ADC sampling at 1 kSPS with 5 μA sleep current target. IC Role / Device Role / Timing Role: Low-noise 1.25 V reference supplying bias to front-end instrumentation amplifier and ADC reference input. Use Value: 9 μV p-p (0.1–10 Hz) noise prevents baseline wander artifacts; 85 μA IQ enables multi-year operation on CR2032 cell. |
| Data Acquisition Systems | Automotive |
Use Scenario: Industrial DAQ module with 8-channel simultaneous-sampling 24-bit sigma-delta ADC and isolated SPI interface. IC Role / Device Role / Timing Role: Primary reference source for ADC and auxiliary precision DACs generating sensor excitation currents. Use Value: Load regulation ≤400 ppm/mA ensures consistent full-scale code across all channels despite dynamic current demand shifts. | Use Scenario: Engine control unit (ECU) subsystem monitoring rail voltages and sensor outputs in under-hood environment (−40°C to +125°C). IC Role / Device Role / Timing Role: Stable 1.25 V reference for analog comparators and ADCs measuring throttle position, coolant temperature, and O2 sensor signals. Use Value: Extended temperature rating and 150 ppm/1000 hrs long-term stability guarantee calibration integrity over 15-year vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR127AUJZ-REEL7 | A-grade version: ±0.24% initial accuracy, 25 ppm/°C max tempco vs. B-grade's ±0.12% and 9 ppm/°C. | Suitable where cost sensitivity outweighs ultra-high accuracy; acceptable for general-purpose DAQ but not metrology-grade instruments. | Select ADR127AUJZ-REEL7 when tighter initial tolerance is unnecessary and BOM cost reduction is prioritized. |
| REF191GS | 1.25 V reference with ±0.2% initial accuracy, 25 ppm/°C tempco, 65 μA IQ, and SO-8 package-not pin-compatible. | Higher noise (12 μV p-p), lower sourcing capability (±10 mA), and larger footprint limit use in ultra-low-power or space-constrained designs. | Choose REF191GS only if existing SO-8 layout rework is feasible and 25 ppm/°C tempco meets system error budget. |
Compared with ADR127BUJZ-REEL7, the ADR127AUJZ-REEL7 trades 0.12% accuracy and 9 ppm/°C stability for lower cost, while REF191GS offers higher output current but sacrifices noise performance, thermal stability, and board area efficiency-making ADR127BUJZ-REEL7 optimal for compact, high-accuracy, low-power analog systems.
Availability
ADR127BUJZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical equipment, data acquisition systems, and automotive subsystems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ADR127BUJZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADR12x family was designed specifically for micropower, high-accuracy voltage reference applications in portable, automotive, and industrial systems where low dropout, low noise, and wide temperature stability are essential.
FAQ
What is the maximum input voltage rating for ADR127BUJZ-REEL7?
The absolute maximum input voltage for ADR127BUJZ-REEL7 is 20 V relative to GND, as specified in the Absolute Maximum Ratings table. Continuous operation above 18 V is not recommended due to thermal dissipation limits and potential reliability degradation. At 18 V input and 5 mA load, power dissipation reaches ~85 mW, exceeding the 40 mW rated limit for the TSOT package unless heatsinking is implemented.
Does ADR127BUJZ-REEL7 require an input capacitor?
ADR127BUJZ-REEL7 does not require an input capacitor for basic operation, but a 1 μF to 10 μF ceramic capacitor is recommended to improve transient response during sudden supply changes. An additional 0.1 μF capacitor in parallel further reduces high-frequency supply noise. These capacitors help maintain regulation stability when used with noisy or high-impedance sources such as switch-mode power supplies or long PCB traces feeding the VIN pin of ADR127BUJZ-REEL7.
Can ADR127BUJZ-REEL7 sink and source current simultaneously?
No-ADR127BUJZ-REEL7 operates in either sourcing or sinking mode depending on external circuit configuration, but cannot perform both functions simultaneously on the same VOUT node. It delivers up to +5 mA (source) or accepts up to −2 mA (sink) relative to its output terminal. Bidirectional current flow requires external circuitry such as an op-amp buffer or H-bridge arrangement; the ADR127BUJZ-REEL7 itself regulates voltage, not current direction.
What is the purpose of the three NC pins on ADR127BUJZ-REEL7?
Pins 1, 5, and 6 of ADR127BUJZ-REEL7 are designated No Connect (NC) and must be left electrically floating-neither tied to GND nor routed to any net. These pins have no internal connection and serve mechanical or manufacturing purposes only. Connecting them risks parasitic coupling, increased leakage, or ESD susceptibility. The datasheet explicitly states "MUST BE LEFT FLOATING" for Pin 1 and "NC = NO CONNECT" for Pins 5 and 6 in the pin configuration diagram.
How does the ADR127BUJZ-REEL7 achieve its low temperature coefficient?
ADR127BUJZ-REEL7 achieves its 9 ppm/°C max temperature coefficient through a patented curvature-correction technique applied to its band gap core. This method compensates for second-order nonlinearities in the base-emitter voltage (VBE) vs. temperature curve by combining complementary-to-absolute-temperature (CTAT) and proportional-to-absolute-temperature (PTAT) voltage components with precise weighting. The result is a flatter VOUT vs. temperature profile across −40°C to +125°C, verified in Figure 2 and Table 3 of the datasheet.
ADR127BUJZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.12%
- Temperature Coefficient:
- 9ppm/°C
- Noise - 0.1Hz to 10Hz:
- 9µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.7V ~ 18V
- Current - Supply:
- 95µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-6
ADR127BUJZ-REEL7 FAQ
1.How can I place an order for ADR127BUJZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR127BUJZ-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 ADR127BUJZ-REEL7 reliable?
The price and inventory of ADR127BUJZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR127BUJZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADR127BUJZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR127BUJZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR127BUJZ-REEL7?
ADR127BUJZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR127BUJZ-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 ADR127BUJZ-REEL7?
For technical support, including ADR127BUJZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR127BUJZ-REEL7 requirements.
6.How does Aetrix verify that ADR127BUJZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADR127BUJZ-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 ADR127BUJZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADR127BUJZ-REEL7?
All ADR127BUJZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR127BUJZ-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 ADR127BUJZ-REEL7 part is unused and in its original packaging.
Return procedure for ADR127BUJZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADR127BUJZ-REEL7 Tags
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