My Inquiry
My Account
Analog Devices Inc. ADR525BKS-R2
- Part No.:
- ADR525BKS-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADR525BKS-R2.pdf
- Description:
- IC VREF SHUNT PREC 2.5V SC-70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,156
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADR525BKS-R2 from Analog Devices is a high-precision shunt voltage reference delivering 2.5 V output with ±0.2% initial accuracy, 40 ppm/°C temperature coefficient, and 18 μV p-p low-frequency noise. It operates from 50 μA to 15 mA over −40°C to +85°C and is used in precision ADC/DAC biasing, portable instrumentation, and battery-powered data acquisition systems.
For engineers reviewing the ADR525BKS-R2 datasheet, ADR525BKS-R2 pinout, ADR525BKS-R2 application, or ADR525BKS-R2 equivalent, key selection criteria include output voltage stability under varying load current, trim capability for system-level calibration, SC70 package footprint constraints, and compatibility with low-power, space-constrained analog signal chains.
Technical Context
The ADR525BKS-R2 implements a bandgap-based shunt architecture with dual-transistor current-density compensation to achieve near-zero net temperature coefficient. Its trim terminal enables ±0.5% output adjustment without degrading temperature performance.
It requires no external capacitor for stability and maintains regulation across capacitive loads up to 10 nF. Dynamic output impedance is 0.2 Ω over 0.1 mA–15 mA operating current, supporting fast transient response in precision feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±5 mV (Grade B) - ensures accurate 12-bit+ DAC/ADC reference at room temperature |
| Initial Accuracy | ±0.2% - reduces system calibration burden in factory-trimmed instrumentation |
| Tempco | 40 ppm/°C max - limits drift to ±0.85 mV over full industrial range (−40°C to +85°C) |
| Output Noise | 18 μV p-p (0.1 Hz–10 Hz) - preserves SNR in high-resolution 24-bit sigma-delta converters |
| Operating Current | 50 μA to 15 mA - supports ultra-low-power sensor nodes and high-current reference buffers |
| Trim Range | ±0.5% via TRIM pin - allows correction of PCB layout errors or sensor offset without redesign |
| Package | 3-Lead SC70 (KS-3) - occupies 1.1 mm × 1.35 mm footprint for dense portable PCBs |
Pinout & Package
ADR525BKS-R2 is housed in a 3-lead SC70 (KS-3) package per EIAJ SC70 standard, with 0.65 mm lead pitch and 0.10 mm coplanarity. The package measures 1.10 mm × 1.35 mm × 0.90 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Anode / Reference Output | Connects to regulated 2.5 V node; sinks current from external bias resistor and load |
| V− | Cathode / Ground Reference | Return path for reference current; must be tied to system ground with low-impedance trace |
| TRIM | Adjustment Terminal | Accepts external potentiometer or DAC to shift output ±0.5% while preserving tempco and noise specs |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with any capacitive load up to 10 nF - eliminates BOM cost and board area for decoupling cap |
| Low operating current floor | 50 μA minimum - enables operation from coin-cell batteries for >10-year shelf life in IoT sensors |
| Ultralow turn-on settling | 2 μs to 0.1% - supports burst-mode ADC sampling and power-gated precision circuits |
| Pin-compatible with LM4040/LM4050 | Direct drop-in replacement in existing SOT-23-3 designs when using ADR525BRT variants; SC70 variant requires layout update |
| Thermal hysteresis | 40 ppm - ensures repeatable voltage after thermal cycling in automotive engine control units |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and pressure at 10-second intervals. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for 24-bit sigma-delta ADC measuring sensor bridge outputs. Use Value: ±0.2% initial accuracy and 40 ppm/°C tempco ensure <0.05% total error over vehicle cabin temperature range (−40°C to +85°C), eliminating field recalibration. | Use Scenario: Occupancy detection module using MEMS accelerometer and analog front-end in infotainment head unit. IC Role / Device Role / Timing Role: Supplies precision bias voltage to low-noise op amp driving accelerometer signal chain. Use Value: 18 μV p-p noise prevents degradation of accelerometer resolution below 1 mg, meeting ASIL-B functional safety requirements. |
| Industrial Process Transmitters | Energy Meter Reference Subsystem |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART communication. IC Role / Device Role / Timing Role: Shunt reference establishing precise 2.5 V for DAC generating analog output and internal ADC monitoring supply rail. Use Value: Trim terminal allows factory calibration to compensate for PCB copper resistance and solder joint variance, achieving 0.1% end-to-end accuracy. | Use Scenario: Polyphase electricity meter requiring metrology-grade voltage reference for 3-phase voltage sensing. IC Role / Device Role / Timing Role: Primary reference for 3-channel 24-bit ADC sampling grid voltage waveforms at 8 kSPS. Use Value: 50 μA–15 mA operating range accommodates both active measurement mode and deep-sleep wake-up, enabling <10 μA quiescent current in standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C25IDCKR | ±0.5% initial accuracy, 100 ppm/°C tempco, 25 μV p-p noise, SOT-23-3 only | Lacks TRIM pin; higher drift limits use in wide-temperature industrial transmitters | Select when cost sensitivity outweighs precision requirements and SC70 footprint is not mandatory |
| MAX6008BAUT25+T | ±0.2% initial accuracy, 75 ppm/°C tempco, 20 μV p-p noise, SOT-23-3 only | No trim capability; higher tempco increases error by +0.75 mV over −40°C to +85°C vs. ADR525BKS-R2 | Choose for legacy SOT-23-3 designs where pin compatibility is critical and moderate tempco is acceptable |
Compared with LM4040C25IDCKR and MAX6008BAUT25+T, the ADR525BKS-R2 delivers superior thermal stability and lower noise in the smallest available footprint, making it optimal for next-generation portable and automotive precision analog systems where board area and long-term accuracy are constrained.
Availability
ADR525BKS-R2 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and RoHS-compliant sourcing.
Supply support for ADR525BKS-R2 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 ADR520/ADR525/ADR530/ADR540/ADR550 family was designed specifically for space-constrained, battery-operated precision measurement systems requiring ultralow drift, minimal external components, and robust operation across industrial temperatures.
FAQ
What is the maximum operating current for ADR525BKS-R2?
The ADR525BKS-R2 supports a maximum operating current of 15 mA. This upper limit ensures safe junction temperature operation within the SC70 package's thermal resistance (θJA = 580.5°C/W) across the full −40°C to +85°C ambient range. Exceeding 15 mA risks permanent damage due to thermal overstress and is prohibited per Absolute Maximum Ratings.
Does ADR525BKS-R2 require an external capacitor for stability?
No, the ADR525BKS-R2 does not require an external capacitor for stability. Its internal design guarantees stability with any capacitive load up to 10 nF, including direct connection to ADC reference inputs or op-amp feedback networks. This eliminates the need for external decoupling components, reducing BOM count and PCB area in compact designs.
How is the TRIM pin used on ADR525BKS-R2?
The TRIM pin on ADR525BKS-R2 accepts an external potentiometer or DAC to adjust the output voltage over a ±0.5% range (±12.5 mV around 2.5 V) without affecting temperature coefficient or noise performance. A typical implementation uses a 10 kΩ potentiometer between V+ and V−, with the wiper connected to TRIM, enabling fine calibration of system-level offsets during production test.
What is the voltage noise specification for ADR525BKS-R2?
The ADR525BKS-R2 has a voltage noise of 18 μV p-p measured over the 0.1 Hz to 10 Hz bandwidth. This low noise level is critical for high-resolution data acquisition systems, ensuring that reference noise contributes less than 0.0007% error to a 24-bit ADC full-scale range, preserving effective number of bits (ENOB) in precision measurement applications.
Is ADR525BKS-R2 pin-compatible with LM4040 series devices?
The ADR525BKS-R2 is not pin-compatible with the LM4040 series due to its SC70 (KS-3) package, whereas LM4040 devices use SOT-23-3. However, the ADR525BRT-R2 variant (same electrical specs, SOT-23-3 package) is pin-compatible and serves as a direct drop-in replacement for LM4040/LM4050 in existing layouts, offering improved accuracy and tempco.
ADR525BKS-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Reference Type:
- -
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- -
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADR525BKS-R2 FAQ
1.How can I place an order for ADR525BKS-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR525BKS-R2 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 ADR525BKS-R2 reliable?
The price and inventory of ADR525BKS-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR525BKS-R2 is usually 5 days.
3.What payment methods are accepted for ADR525BKS-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR525BKS-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR525BKS-R2?
ADR525BKS-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR525BKS-R2 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 ADR525BKS-R2?
For technical support, including ADR525BKS-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR525BKS-R2 requirements.
6.How does Aetrix verify that ADR525BKS-R2 is sourced from the original manufacturer or authorized distributors?
All ADR525BKS-R2 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 ADR525BKS-R2 meets industry standards.
7.What is the process for return or replacement of ADR525BKS-R2?
All ADR525BKS-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR525BKS-R2, 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 ADR525BKS-R2 part is unused and in its original packaging.
Return procedure for ADR525BKS-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADR525BKS-R2 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
