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Analog Devices Inc./Maxim Integrated MAX6190BESA+T
- Part No.:
- MAX6190BESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6190BESA+T.pdf
- Description:
- IC VREF SERIES 0.32% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,379
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Product details
Overview
MAX6190BESA+T from Maxim Integrated is a precision micropower low-dropout series voltage reference delivering 1.250V output with ±2mV initial accuracy, 5ppm/°C max temperature coefficient, and 35µA max quiescent current-designed for high-accuracy ADC/DAC biasing in battery-powered handheld instruments.
For engineers reviewing the MAX6190BESA+T datasheet, MAX6190BESA+T pinout, MAX6190BESA+T application, or MAX6190BESA+T equivalent, this page provides verified specifications, SO-8 package layout, load-regulation behavior at 500µA, dropout performance down to 100mV, and real-world alternatives for precision analog signal chains.
Technical Context
The MAX6190BESA+T employs a curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve <5ppm/°C temperature drift and ±2mV initial tolerance across –40°C to +85°C. It operates as a series-mode reference, sourcing or sinking up to ±500µA while maintaining regulation.
Internally compensated for stability with capacitive loads up to 2.2nF, it achieves 30µs turn-on settling to 0.1% and exhibits 0.12µV/µA load regulation and 8µV/V line regulation-enabling direct use in space-constrained, low-noise precision systems without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.250V ±2mV (±0.16% initial error; enables 16-bit ADC reference without trimming) |
| Temp Coefficient | ≤5ppm/°C (max drift of ±0.425mV over –40°C to +85°C; supports industrial-grade stability) |
| Quiescent Current | ≤35µA (enables >1-year battery life in 10µA-sleep systems; supply-current variation ≤2µA/V) |
| Dropout Voltage | 100mV at 500µA load (supports operation from 1.35V input; critical for single-cell Li-ion or 1.5V alkaline systems) |
| Load Regulation | 0.12µV/µA (output shift ≤60µV across full ±500µA load range; ensures stable reference under dynamic DAC loading) |
| Noise (0.1–10Hz) | 65µVRMS (low-frequency noise compatible with 24-bit sigma-delta ADC front-ends) |
| Capacitive Load | Stable with 0–2.2nF (no minimum COUT required; eliminates board-space penalty of decoupling caps) |
Pinout & Package
MAX6190BESA+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with exposed pad not electrically connected. Pins 1, 3, 5, 7, and 8 are No Connect (N.C.)-not internally bonded-and must remain unconnected on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 2 (IN) | Supply Input | Accepts 2.5V to 12.6V; supplies internal bandgap core and output buffer; dropout headroom defined relative to this pin |
| 4 (GND) | Analog Ground | Reference return path; must be tied to clean system ground plane to minimize noise coupling into VOUT |
| 6 (OUT) | Precision Reference Output | Delivers regulated 1.250V; capable of sourcing/sinking ±500µA; low impedance (<1Ω at DC) ensures minimal load-induced error |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±2mV initial accuracy and <5ppm/°C tempco without external calibration |
| Curvature-correction circuit | Compensates second-order thermal effects in bandgap core, reducing parabolic drift across temperature |
| Series-mode architecture | Draws only 35µA quiescent current regardless of load-unlike shunt references that waste current at no-load |
| Internal compensation | Eliminates need for external capacitor; stable with 0–2.2nF load capacitance for flexible PCB layout |
| Low-output impedance | Supports fast transient response (30µs to 0.1%) and drives 500µA loads without external buffer |
Applications
| Hand-Held Instruments | Analog-to-Digital Converters |
|---|---|
Use Scenario: Portable multimeter or data logger powered by single AA/AAA cell with 1.2–1.5V nominal voltage. IC Role / Device Role / Timing Role: Provides stable 1.250V reference for 16-bit SAR ADC measuring sensor outputs. Use Value: 100mV dropout allows operation down to 1.35V input; 35µA supply current extends battery life beyond 12 months. |
Use Scenario: High-resolution industrial ADC module digitizing 4–20mA loop signals with ±0.01% total unadjusted error. IC Role / Device Role / Timing Role: Precision voltage reference for ADC internal conversion core and external gain-setting resistors. Use Value: ±2mV initial error and 5ppm/°C tempco contribute <0.005% of full-scale error-meeting Class A metrology requirements. |
| Industrial Process Control | Precision 3V/5V Systems |
Use Scenario: Loop-powered transmitter with HART communication, requiring stable reference under varying supply and temperature. IC Role / Device Role / Timing Role: Primary reference for DAC generating 4–20mA output current; also biases op-amps in signal conditioning stage. Use Value: Load regulation of 0.12µV/µA ensures <1 LSB error even during HART frequency modulation transients. |
Use Scenario: Low-power microcontroller system with integrated 12-bit ADC operating from regulated 3.3V rail. IC Role / Device Role / Timing Role: External reference replacing noisy internal bandgap to improve ADC effective resolution from 10.5 to 11.8 ENOB. Use Value: 65µVRMS (0.1–10Hz) noise reduces quantization uncertainty below 1 LSB for 12-bit conversion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF191GS | 1.25V output, ±1.5mV initial accuracy, 3ppm/°C tempco, 45µA supply current, SO-8 package | Lower tempco but higher quiescent current; requires ≥2.7V input (vs. MAX6190BESA+T's 2.5V min) | Select REF191GS when ultimate temperature stability is prioritized over battery life or low-voltage operation. |
| ADR3412ARJZ-R7 | 1.2V output, ±1.2mV initial accuracy, 10ppm/°C tempco, 120µA supply current, SOT-23-5 package | Different output voltage (1.2V vs. 1.25V); higher current draw; smaller footprint but lower load drive (±10mA) | Choose ADR3412ARJZ-R7 only if board area is constrained and 1.2V reference suffices for system gain scaling. |
Compared with REF191GS and ADR3412ARJZ-R7, MAX6190BESA+T uniquely balances ultra-low supply current (35µA), 1.25V output compatibility with legacy 1.25V-based ADC designs, and 2.5V minimum input-making it optimal for long-life, low-voltage portable instrumentation where reference voltage matching and power efficiency are jointly critical.
Availability
MAX6190BESA+T is available at Aetrix Electronics and suitable for handheld instruments, precision ADC/DAC subsystems, and industrial process control modules requiring stable component supply across extended production lifecycles.
Supply support for MAX6190BESA+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 high-performance analog and mixed-signal ICs for precision, power, and interface applications.
The MAX6190 family targets battery-powered and space-constrained systems needing micropower, low-dropout, high-accuracy voltage references-specifically optimized for portable test equipment and high-resolution data acquisition.
FAQ
What is the maximum load current supported by MAX6190BESA+T while maintaining regulation?
MAX6190BESA+T guarantees regulation for sourcing and sinking currents up to ±500µA. At 500µA load, dropout voltage remains ≤100mV, and load regulation is specified at 0.12µV/µA-meaning output shifts by no more than 60µV across the full ±500µA range. This capability enables direct driving of ADC reference inputs and op-amp bias networks without external buffers.
Does MAX6190BESA+T require an output capacitor for stability?
No, MAX6190BESA+T is internally compensated and stable with output capacitance ranging from 0 to 2.2nF. Unlike many references, it does not require a minimum COUT for phase margin. An external capacitor may be added to improve transient response to step load changes, but it is optional-reducing BOM count and PCB area in space-sensitive designs.
What is the minimum input voltage required for MAX6190BESA+T to maintain 1.250V output accuracy?
The minimum input voltage for MAX6190BESA+T is 2.5V. At 500µA load, the dropout voltage is guaranteed ≤100mV, so VIN must be ≥1.35V to sustain regulation-but the absolute minimum specified input is 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V is not characterized and may result in degraded accuracy or instability.
How does the temperature coefficient of MAX6190BESA+T compare to the MAX6190AESA+T and MAX6190CESA+T variants?
MAX6190BESA+T has a maximum temperature coefficient of 5ppm/°C, tighter than MAX6190CESA+T (10ppm/°C) and looser than MAX6190AESA+T (4ppm/°C). All three share the same 1.250V output and ±2mV, ±4mV, and ±6mV initial accuracy grades respectively-so MAX6190BESA+T offers the best balance of cost and mid-tier stability for industrial-grade applications where <5ppm/°C is sufficient.
Can MAX6190BESA+T be used in automotive applications?
MAX6190BESA+T is rated for –40°C to +85°C operation and carries the "+" suffix indicating RoHS compliance, but it is not qualified to AEC-Q100. For automotive use, Maxim offers the /V variant (e.g., MAX6190BESA/V+), which undergoes additional stress testing and qualification. Using MAX6190BESA+T in automotive environments is possible only if system-level validation confirms reliability under required temperature cycling, vibration, and lifetime conditions.
MAX6190BESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 500 µA
- Tolerance:
- ±0.32%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 25µVp-p
- Noise - 10Hz to 10kHz:
- 65µVrms
- Voltage - Input:
- 2.5V ~ 12.6V
- Current - Supply:
- 35µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6190BESA+T FAQ
1.How can I place an order for MAX6190BESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6190BESA+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 MAX6190BESA+T reliable?
The price and inventory of MAX6190BESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6190BESA+T is usually 5 days.
3.What payment methods are accepted for MAX6190BESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6190BESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6190BESA+T?
MAX6190BESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6190BESA+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 MAX6190BESA+T?
For technical support, including MAX6190BESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6190BESA+T requirements.
6.How does Aetrix verify that MAX6190BESA+T is sourced from the original manufacturer or authorized distributors?
All MAX6190BESA+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 MAX6190BESA+T meets industry standards.
7.What is the process for return or replacement of MAX6190BESA+T?
All MAX6190BESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6190BESA+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 MAX6190BESA+T part is unused and in its original packaging.
Return procedure for MAX6190BESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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