My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6161BESA
- Part No.:
- MAX6161BESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6161BESA.pdf
- Description:
- IC VREF SERIES 0.32% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,498
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6161BESA from Maxim Integrated is a precision, low-dropout, micropower series voltage reference delivering a nominal 1.25V output with ±4mV initial accuracy and 6–15ppm/°C temperature coefficient over –40°C to +85°C. It sources up to 4mA load current, draws only 100–120μA quiescent supply current, and operates down to 2.5V input (VOUT + 200mV), making it ideal for high-accuracy ADC biasing in space-constrained, battery-powered instrumentation.
For engineers reviewing the MAX6161BESA datasheet, MAX6161BESA pinout, MAX6161BESA application, or MAX6161BESA equivalent, key selection criteria include its guaranteed 1.25V output tolerance, ultra-low 8μA/V supply current variation, no-external-capacitor stability, 50–200mV dropout at 1mA, and SO-8 package compatibility with precision analog signal chains.
Technical Context
This series-mode voltage reference uses a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve tight initial accuracy and low thermal drift. Its internal compensation eliminates need for external capacitors, while BiCMOS process ensures stable operation with 1μF capacitive loads and robust line/load regulation.
Designed for high-performance analog systems, the MAX6161BESA features supply-independent quiescent current (100–120μA typ), 0.5–0.9mV/mA sourcing load regulation, and 1.3–2.5mV/mA sinking load regulation - enabling accurate reference delivery across varying load and supply conditions without efficiency penalty.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.25V ±4mV at +25°C - guarantees reference accuracy within 0.32% for 12-bit+ ADCs |
| Temp Coefficient | 6–15ppm/°C max - limits drift to ≤1.275mV over full –40°C to +85°C range |
| Quiescent Current | 100–120μA typ - enables >1-year battery life in 10μA-sleep systems |
| Dropout Voltage | 50–200mV at 1mA - supports operation from 1.35V input in low-voltage designs |
| Load Regulation | 0.5–0.9mV/mA sourcing - maintains <3.6mV error across full 4mA load range |
| Noise (0.1–10Hz) | 20μVp-p - contributes <0.0016% of full-scale error in 1.25V-referenced 16-bit ADCs |
| Line Regulation | 12–150μV/V - adds ≤150μV error per volt of input variation, critical for unregulated supplies |
Pinout & Package
MAX6161BESA is housed in an 8-pin SO (Small Outline) package with exposed pad option not specified; pin 1 is OUT, pin 2 is IN, pin 4 is GND, and pins 1,3,5,7,8 are No Connect (N.C.). The layout supports standard SO-8 footprint with 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Reference output terminal - delivers regulated 1.25V; requires no external capacitor for stability |
| 2 | IN | Input voltage terminal - accepts 2.5V to 12.6V; decoupling with 0.1μF ceramic improves transient response |
| 4 | GND | Analog ground reference - must be connected to clean system ground plane to minimize noise coupling |
| 3,5,7,8 | N.C. | No internal connection - left floating; no PCB trace or solder required |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±4mV initial accuracy and 6–15ppm/°C tempco without post-package calibration |
| Internally compensated architecture | Eliminates need for external compensation capacitor - saves board area and BOM cost |
| Supply-current independence | Only 3.2–8.0μA/V variation ensures predictable power budget across 2.5–12.6V input range |
| Low-output-impedance drive | Stable with 1μF capacitive loads and capable of sourcing 4mA - directly drives ADC reference inputs and op-amp bias networks |
| Curvature-correction circuit | Reduces second-order thermal errors - achieves flat VOUT vs. T curve over industrial temperature range |
Applications
| Portable DMM Front-End | Medical Sensor Signal Chain |
|---|---|
Use Scenario: High-resolution handheld digital multimeter requiring stable 1.25V reference for 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Precision voltage reference providing excitation and scaling for analog front-end and ADC conversion. Use Value: ±4mV initial accuracy and 15ppm/°C max tempco ensure <0.02% measurement error across operating temperature, meeting Class I DMM specifications. | Use Scenario: Low-power wearable ECG monitor with battery life target >7 days and 16-bit ADC resolution. IC Role / Device Role / Timing Role: Reference source for analog sensor conditioning and ADC - directly impacts signal-to-noise ratio and gain stability. Use Value: 100μA quiescent current and 200mV dropout enable operation from single-cell Li-ion (3.0–4.2V), extending runtime without sacrificing accuracy. |
| Notebook System Power Monitor | Industrial Data Acquisition Module |
Use Scenario: Real-time voltage/current monitoring in notebook battery management IC using 12-bit SAR ADC. IC Role / Device Role / Timing Role: Stable reference for ratiometric sensing of shunt resistor voltage drops. Use Value: 0.9mV/mA load regulation ensures <3.6mV error across full 4mA load swing - critical for sub-1% current measurement accuracy. | Use Scenario: DIN-rail mounted DAQ module with isolated 4–20mA loop interface and 16-bit ADC. IC Role / Device Role / Timing Role: Primary reference for precision DAC output buffering and ADC reference path. Use Value: 20μVp-p (0.1–10Hz) noise and 125ppm hysteresis guarantee repeatable measurements after thermal cycling in harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF191GS | 1.25V output, ±2mV initial accuracy, 5ppm/°C tempco, 100μA IQ, SO-8 - tighter initial spec but higher cost | Preferred where ±2mV accuracy is mandatory (e.g., metrology-grade calibrators) | Select REF191GS if tighter initial tolerance justifies premium pricing; MAX6161BESA offers better value for industrial-grade systems |
| ADR3412ARJZ-R7 | 1.2V output, ±3mV accuracy, 10ppm/°C, 120μA IQ, SOT-23-5 - different output voltage and smaller package | Suitable for compact, lower-voltage systems where 1.2V reference suffices and board area is constrained | Choose ADR3412ARJZ-R7 only when 1.2V output aligns with system design; MAX6161BESA provides exact 1.25V match for legacy ADCs |
Compared with REF191GS and ADR3412ARJZ-R7, the MAX6161BESA uniquely balances 1.25V output fidelity, SO-8 compatibility, and cost-effective ±4mV/15ppm performance - making it optimal for volume industrial and portable instrumentation where absolute metrology-grade specs are unnecessary.
Availability
MAX6161BESA is available at Aetrix Electronics and suitable for portable DMMs, medical sensor signal chains, notebook power monitors, and industrial data acquisition modules requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6161BESA 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 demanding industrial, medical, and communications applications.
The MAX6161–MAX6168 family was engineered specifically for high-accuracy, low-power voltage referencing in battery-operated and space-constrained systems - emphasizing micropower operation, low dropout, and capacitor-free stability.
FAQ
What is the guaranteed initial accuracy of the MAX6161BESA over temperature?
The MAX6161BESA has a guaranteed initial accuracy of ±4mV at +25°C, with total error over –40°C to +85°C including temperature coefficient (6–15ppm/°C), line regulation (≤150μV/V), and load regulation (≤0.9mV/mA). This yields worst-case output deviation of ±6.2mV (±0.5%) across full industrial temperature range - sufficient for 12-bit systems.
Does the MAX6161BESA require an external output capacitor for stability?
No, the MAX6161BESA does not require an external output capacitor for stability due to its internally compensated architecture. It remains stable with capacitive loads up to 1μF. An optional 0.1μF ceramic capacitor may be added at the output to improve transient response in dynamic load applications, but it is not necessary for basic operation.
What is the maximum load current the MAX6161BESA can source?
The MAX6161BESA can source up to 4mA of load current while maintaining specified accuracy and regulation. This is confirmed in the Electrical Characteristics table under "Load Regulation" for sourcing (0 ≤ IOUT ≤ 4mA) and is distinct from higher-current variants like MAX6166B (5mA). Exceeding 4mA may degrade output voltage accuracy beyond datasheet limits.
How does the supply current of the MAX6161BESA vary with input voltage?
The MAX6161BESA exhibits a supply current variation of only 3.2–8.0μA/V across its 2.5V to 12.6V input range - meaning total change is ≤80μA over full VIN span. This near-constant 100–120μA quiescent current simplifies power budgeting and avoids efficiency loss common in shunt references, especially in battery-powered systems.
Is the MAX6161BESA pin-compatible with other devices in the MAX6161–MAX6168 family?
Yes, all MAX6161–MAX6168 variants, including MAX6161BESA, share identical 8-pin SO package pinout (IN, GND, OUT, N.C. configuration) and electrical interface. This allows direct substitution between output voltage options (e.g., 1.25V, 2.048V, 2.5V) without PCB redesign - provided system-level requirements (accuracy, tempco, load current) are verified for the replacement part.
MAX6161BESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.32%
- Temperature Coefficient:
- 15ppm/°C
- Noise - 0.1Hz to 10Hz:
- 20µVp-p
- Noise - 10Hz to 10kHz:
- 15µVrms
- Voltage - Input:
- 2.5V ~ 12.6V
- Current - Supply:
- 150µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6161BESA FAQ
1.How can I place an order for MAX6161BESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6161BESA 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 MAX6161BESA reliable?
The price and inventory of MAX6161BESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6161BESA is usually 5 days.
3.What payment methods are accepted for MAX6161BESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6161BESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6161BESA?
MAX6161BESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6161BESA 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 MAX6161BESA?
For technical support, including MAX6161BESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6161BESA requirements.
6.How does Aetrix verify that MAX6161BESA is sourced from the original manufacturer or authorized distributors?
All MAX6161BESA 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 MAX6161BESA meets industry standards.
7.What is the process for return or replacement of MAX6161BESA?
All MAX6161BESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6161BESA, 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 MAX6161BESA part is unused and in its original packaging.
Return procedure for MAX6161BESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6161BESA 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…
