My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6138BEXR41+T
- Part No.:
- MAX6138BEXR41+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- -
- Datasheet:
-
MAX6138BEXR41+T.pdf
- Description:
- IC VREF SHUNT 4.096V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:1,640
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6138BEXR41+T from Maxim Integrated is a precision two-terminal shunt-mode bandgap voltage reference with a fixed reverse breakdown voltage of 4.096V, ±0.2% initial accuracy (Grade B), 25ppm/°C max temperature coefficient, and 73µA minimum operating current. It operates from −40°C to +85°C in the 3-pin SC70 package and serves as a stable reference for ADC/DAC biasing in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the MAX6138BEXR41+T datasheet, MAX6138BEXR41+T pinout, MAX6138BEXR41+T application, or MAX6138BEXR41+T equivalent, key selection criteria include its 4.096V output's compatibility with 12-bit ADC full-scale ranges, low 64µVRMS wideband noise (10Hz–10kHz), and guaranteed stability without external capacitors across capacitive loads up to 1µF.
Technical Context
The MAX6138BEXR41+T implements a laser-trimmed bandgap core in BiCMOS process to achieve precise 4.096V reverse breakdown voltage with minimal thermal drift. Its two-terminal architecture requires only a series source resistor (RS) to regulate shunt current between 73µA and 15mA, enabling simple integration into high-side reference configurations.
Unlike three-terminal references, it functions as a programmable current sink-maintaining constant VR by dynamically adjusting ISHUNT-and exhibits low dynamic impedance (0.5–1.0Ω at 1mA/120Hz) and predictable load-transient response (<10µs settling for ±250µA steps at 1mA bias).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±0.2% initial tolerance (Grade B) ensures ≤±8.2mV absolute error at +25°C for 12-bit system calibration. |
| Temp Coefficient | ≤25ppm/°C over −40°C to +85°C; guarantees ≤±1.04mV total drift across full temperature range. |
| Min Operating Current | 73µA maximum (typical 50µA); sets minimum RS value to sustain regulation under worst-case low-VS/high-ILOAD conditions. |
| Shunt Current Range | 73µA to 15mA; supports wide load variation while maintaining <10mV output change (ΔVR/ΔIR ≤3.0mV/mA above 1mA). |
| Wideband Noise | 64µVRMS (10Hz–10kHz); contributes <0.15 LSB noise to a 12-bit, 4.096V-FS ADC (LSB = 1mV). |
| Dynamic Impedance | 0.5–1.0Ω at 1mA/120Hz; enables fast transient response and stable operation with >1µF capacitive loads. |
| Long-Term Stability | 120ppm after 1000h; ≤0.5mV drift over 6 months, critical for unattended sensor node deployments. |
Pinout & Package
Package: 3-pin SC70 (1.8mm × 1.8mm), RoHS-compliant, surface-mount. Pin 3 is No Connection (N.C.) and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Positive terminal (anode) | Connects to regulated voltage node (VR); sinks current when reverse-biased. |
| Pin 2 (−) | Negative terminal (cathode) | Reference ground return; ties to system GND or low-impedance return path. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; floating N.C. pin prevents parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70 package | 1.8mm × 1.8mm footprint-50% smaller than SOT23-enables high-density PCB layouts in space-constrained IoT sensors. |
| No external capacitor required | Internally compensated for stability with any capacitive load (0–1µF), eliminating layout sensitivity and reducing BOM count. |
| Low wideband noise | 64µVRMS (10Hz–10kHz) minimizes quantization uncertainty in precision 12-bit data converters. |
| Guaranteed tempco | 25ppm/°C max over −40°C to +85°C ensures predictable performance in industrial ambient environments. |
| High shunt-current capability | 15mA max shunt current allows direct interfacing with high-current DAC buffers or op-amp reference inputs. |
Applications
| Portable Data Loggers | Industrial 4–20mA Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental sensor nodes logging temperature/humidity with 12-bit SAR ADCs. IC Role / Device Role / Timing Role: Provides 4.096V reference for ADC full-scale range, enabling direct LSB = 1mV mapping. Use Value: 0.2% initial accuracy and 25ppm/°C tempco ensure <±2 LSB total error across −25°C to +70°C field operation. |
Use Scenario: Loop-powered 4–20mA transmitters converting analog sensor outputs in factory automation. IC Role / Device Role / Timing Role: Supplies stable reference to precision current-output DAC (e.g., MAX5353) driving the 4–20mA loop. Use Value: 73µA min operating current allows regulation even during low-loop-voltage brownout (≤12V supply). |
| Medical Point-of-Care Devices | Test & Measurement Front Ends |
|
Use Scenario: Handheld blood glucose meters requiring calibrated analog front-end gain/offset correction. IC Role / Device Role / Timing Role: Reference for programmable-gain amplifier (PGA) offset nulling and ADC reference in dual-slope conversion. Use Value: 64µVRMS noise avoids adding measurable uncertainty to sub-100µV biomedical signal chains. |
Use Scenario: Benchtop multimeters and oscilloscope reference channels demanding long-term calibration stability. IC Role / Device Role / Timing Role: Primary voltage reference for auto-zeroing circuits and internal DAC calibration. Use Value: 120ppm/1000h long-term drift enables 6-month recalibration intervals without performance degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C41IDCKR | 4.096V, ±0.5% initial accuracy, 100ppm/°C tempco, SOT23-3 package (2.9mm × 1.6mm). | Larger footprint and higher tempco limit use in wide-temperature industrial designs. | Select when cost sensitivity outweighs size and precision requirements; verify layout clearance for larger SOT23. |
| ADR3440ARJZ-R7 | 4.096V, ±0.1% initial accuracy, 10ppm/°C tempco, but 5-pin SOT23 package (requires external bypass cap). | Three-terminal architecture adds complexity; capacitor dependency increases layout risk. | Choose for ultra-low-drift applications where board area permits 5-pin footprint and capacitor placement. |
Compared with LM4040C41IDCKR and ADR3440ARJZ-R7, the MAX6138BEXR41+T delivers superior size efficiency (SC70 vs. SOT23), tighter tempco than LM4040, and capacitor-free operation versus ADR3440-making it optimal for miniaturized, high-precision, low-noise measurement systems.
Availability
MAX6138BEXR41+T is available at Aetrix Electronics and suitable for portable data loggers, industrial 4–20mA transmitters, and medical point-of-care devices requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6138BEXR41+T 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, medical, and communications applications, with expertise in voltage references, data converters, and power management.
The MAX6138 product line delivers ultra-compact, high-accuracy shunt references optimized for space-constrained, battery-operated systems needing stable 1.22V–5.0V references without external compensation.
FAQ
What is the guaranteed initial accuracy of MAX6138BEXR41+T?
The MAX6138BEXR41+T is specified as Grade B, with guaranteed ±0.2% initial accuracy at +25°C. This means its 4.096V output falls within 4.0878V to 4.1042V at room temperature, confirmed by 100% production testing and correlation across the −40°C to +85°C range.
Can MAX6138BEXR41+T operate without an external capacitor?
Yes, MAX6138BEXR41+T is internally compensated and requires no external capacitor for stability. It remains stable with any output capacitance from 0 to 1µF, simplifying layout and eliminating capacitor-related failure modes in high-reliability applications.
What is the minimum shunt current needed for regulation in MAX6138BEXR41+T?
The MAX6138BEXR41+T requires a minimum shunt current of 73µA (max) to maintain regulation across its full temperature range. This value is derived from the datasheet's IRMIN specification for the 4.096V variant (MAX6138_41) and ensures stable 4.096V output even at −40°C.
How does the temperature coefficient of MAX6138BEXR41+T affect system accuracy?
With a guaranteed maximum temperature coefficient of 25ppm/°C over −40°C to +85°C, the MAX6138BEXR41+T contributes ≤±1.04mV total voltage drift across its operating range. This translates to <±1.0 LSB error in a 12-bit, 4.096V-FS system, supporting tight calibration requirements.
Is Pin 3 of MAX6138BEXR41+T required to be connected?
No-Pin 3 is designated N.C. (No Connection) and must either be left floating or connected to Pin 2 (cathode) as explicitly stated in the datasheet. Leaving it unconnected or tying it to Pin 2 prevents unintended parasitic paths and ensures specified electrical performance.
MAX6138BEXR41+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- 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:
- -
- Supplier Device Package:
- -
MAX6138BEXR41+T FAQ
1.How can I place an order for MAX6138BEXR41+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6138BEXR41+T 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 MAX6138BEXR41+T reliable?
The price and inventory of MAX6138BEXR41+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6138BEXR41+T is usually 5 days.
3.What payment methods are accepted for MAX6138BEXR41+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6138BEXR41+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6138BEXR41+T?
MAX6138BEXR41+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6138BEXR41+T 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 MAX6138BEXR41+T?
For technical support, including MAX6138BEXR41+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6138BEXR41+T requirements.
6.How does Aetrix verify that MAX6138BEXR41+T is sourced from the original manufacturer or authorized distributors?
All MAX6138BEXR41+T 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 MAX6138BEXR41+T meets industry standards.
7.What is the process for return or replacement of MAX6138BEXR41+T?
All MAX6138BEXR41+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6138BEXR41+T, 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 MAX6138BEXR41+T part is unused and in its original packaging.
Return procedure for MAX6138BEXR41+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6138BEXR41+T 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…
