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Analog Devices Inc./Maxim Integrated MAX6190CESA+
- Part No.:
- MAX6190CESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6190CESA+.pdf
- Description:
- IC VREF SERIES 1.25V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,746
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Product details
Overview
MAX6190CESA+ from Maxim Integrated is a precision micropower low-dropout series voltage reference delivering 1.250V output with ±6mV initial accuracy, 10ppm/°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 MAX6190CESA+ datasheet, MAX6190CESA+ pinout, MAX6190CESA+ application, or MAX6190CESA+ equivalent, this page provides verified electrical specifications, SO-8 package layout, load-regulation behavior at 500µA, dropout performance down to 100mV, and real-world stability metrics including 75ppm temperature hysteresis and 50ppm/1000hrs long-term drift.
Technical Context
The MAX6190CESA+ employs a curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve <10ppm/°C temperature coefficient and ±6mV initial accuracy over -40°C to +85°C. It operates as a series-mode reference capable of sourcing and sinking up to ±500µA while maintaining regulation.
Internally compensated for stability with capacitive loads up to 2.2nF, it achieves 30µs typical turn-on settling time to 0.1% and exhibits 8µV/V line regulation and 0.12µV/µA load regulation - enabling direct use in precision data acquisition without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.250V ±6mV (guaranteed initial tolerance at +25°C) |
| Temp Coefficient | ≤10ppm/°C (max drift over full -40°C to +85°C range) |
| Quiescent Current | ≤35µA (enables >1-year battery life in µA-scale systems) |
| Dropout Voltage | 100mV at 500µA load (supports operation from 1.35V input in 1.25V systems) |
| Load Regulation | 0.12µV/µA (output shift <60µV across full ±500µA load range) |
| Line Regulation | 8µV/V (output shift <100µV over 2.5V–12.6V input range) |
| Noise (0.1–10Hz) | 65µVRMS (low-frequency noise critical for 24-bit ADC reference) |
Pinout & Package
MAX6190CESA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and rated for -40°C to +85°C operation. Pin 1 is OUT, Pin 2 is IN, Pin 4 is GND; Pins 1, 3, 5, 7, and 8 are No Connect (N.C.) - internally unconnected and must remain floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 7, 8 | N.C. | No internal connection; must be left unconnected per datasheet |
| 2 | IN | Supply input terminal; accepts 2.5V to 12.6V with ≤35µA supply current |
| 4 | GND | Analog ground reference; requires low-impedance connection to system ground plane |
| 6 | OUT | Precision 1.250V reference output; stable with 0–2.2nF capacitive load |
Key Features
| Feature | Design Value |
|---|---|
| Initial Accuracy | ±6mV (1.250V output = ±0.48% error before calibration) |
| Temperature Stability | 10ppm/°C max (≤0.85mV drift over full industrial temperature range) |
| Low Power Operation | 35µA max supply current (reduces self-heating and extends battery runtime) |
| Capacitive Load Tolerance | Stable with 0–2.2nF output capacitance (eliminates need for external compensation) |
| Source/Sink Capability | ±500µA output drive (supports direct interface to ADC reference inputs and op-amp bias networks) |
Applications
| Hand-Held Instruments | Analog-to-Digital Converters |
|---|---|
Use Scenario: Portable multimeter using 24-bit sigma-delta ADC for sub-mV resolution measurements. IC Role / Device Role / Timing Role: Primary voltage reference for ADC VREF input, establishing absolute measurement scale. Use Value: 10ppm/°C tempco and 75ppm hysteresis ensure repeatable readings across field temperature swings without recalibration. |
Use Scenario: Precision data logger sampling thermocouples and RTDs at 1ksps with 120dB SNR. IC Role / Device Role / Timing Role: Low-noise, low-drift reference source for SAR and delta-sigma ADCs. Use Value: 65µVRMS (0.1–10Hz) noise and 0.12µV/µA load regulation minimize code spread and offset drift during dynamic loading. |
| Industrial Process Control | Precision 3V/5V Systems |
Use Scenario: Loop-powered 4–20mA transmitter with HART modulation requiring stable internal references. IC Role / Device Role / Timing Role: Reference for DAC generating precise current setpoints and sensor excitation. Use Value: 35µA quiescent current enables full functionality within 3.5mA loop budget; 100mV dropout allows operation from marginally regulated 3.3V rails. |
Use Scenario: FPGA I/O bank voltage monitoring and ADC reference in 3.3V/5V mixed-signal SoM. IC Role / Device Role / Timing Role: Secondary reference for rail validation and high-accuracy analog subsystems. Use Value: 8µV/V line regulation ensures stable output despite ±5% supply variation; SO-8 footprint simplifies layout in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6190BESA+ | ±4mV initial accuracy (tighter), same 10ppm/°C tempco and SO-8 package | Better accuracy required for metrology-grade calibration; identical thermal and layout behavior | Select when ±4mV initial error is mandatory and cost premium is acceptable |
| REF191GS | 1.25V output, ±2mV initial accuracy, 25ppm/°C tempco, 45µA supply current, SO-8 | Higher tempco and supply current; lower accuracy grade suitable for non-critical sensing | Choose for cost-sensitive designs where 25ppm/°C drift and 45µA draw are acceptable trade-offs |
Compared with MAX6190CESA+, MAX6190BESA+ offers tighter initial accuracy without changing board layout or thermal design, while REF191GS trades performance for lower unit cost in less demanding applications - making MAX6190CESA+ optimal for mid-tier precision instrumentation balancing accuracy, power, and stability.
Availability
MAX6190CESA+ is available at Aetrix Electronics and suitable for handheld instruments, precision ADC/DAC systems, and industrial process control requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6190CESA+ 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–MAX6195/MAX6198 family was engineered specifically for micropower, low-dropout voltage reference needs in portable and battery-operated instrumentation - emphasizing ultra-low quiescent current, tight initial accuracy, and exceptional temperature stability.
FAQ
What is the output voltage tolerance of MAX6190CESA+ at room temperature?
The MAX6190CESA+ guarantees an output voltage of 1.250V ±6mV at +25°C, corresponding to ±0.48% initial accuracy. This tolerance is laser-trimmed and specified across the full operating temperature range (-40°C to +85°C), with additional drift limited to ≤10ppm/°C. The MAX6190CESA+ datasheet confirms this value under Electrical Characteristics - MAX6190C grade.
Can MAX6190CESA+ drive a 500µA load while maintaining regulation?
Yes, MAX6190CESA+ is fully specified to source and sink up to ±500µA while maintaining output regulation. Its 100mV dropout voltage at 500µA load ensures stable operation even with minimal headroom - for example, delivering 1.250V from a 1.35V supply. Load regulation is characterized at 0.12µV/µA, meaning total output shift remains under 60µV across the full ±500µA range.
Is MAX6190CESA+ stable without an output capacitor?
Yes, MAX6190CESA+ is internally compensated and stable with 0nF output capacitance. It remains stable across the full 0–2.2nF range, eliminating mandatory external capacitors - a key advantage in space-constrained PCB layouts. An optional capacitor may improve transient response to load steps but is not required for stability per the datasheet's Capacitive-Load Stability Range specification.
What is the maximum input voltage for MAX6190CESA+?
The absolute maximum input voltage for MAX6190CESA+ is +13.5V referenced to GND. However, the recommended operating range is 2.5V to 12.6V. Within this range, supply current remains ≤35µA and line regulation is specified at 8µV/V. Exceeding 13.5V risks permanent damage, as defined in the Absolute Maximum Ratings table of the MAX6190CESA+ datasheet.
Does MAX6190CESA+ support both sourcing and sinking current?
Yes, MAX6190CESA+ is a bidirectional reference capable of sourcing 0 to +500µA and sinking -500µA to 0. This dual capability enables direct interfacing with ADC reference inputs, op-amp bias networks, and DAC feedback paths without external buffering. The device maintains regulation and specified load regulation (0.12µV/µA) across the full ±500µA range.
MAX6190CESA+ 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:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 500 µA
- Tolerance:
- ±0.48%
- Temperature Coefficient:
- 25ppm/°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
MAX6190CESA+ FAQ
1.How can I place an order for MAX6190CESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6190CESA+ 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 MAX6190CESA+ reliable?
The price and inventory of MAX6190CESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6190CESA+ is usually 5 days.
3.What payment methods are accepted for MAX6190CESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6190CESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6190CESA+?
MAX6190CESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6190CESA+ 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 MAX6190CESA+?
For technical support, including MAX6190CESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6190CESA+ requirements.
6.How does Aetrix verify that MAX6190CESA+ is sourced from the original manufacturer or authorized distributors?
All MAX6190CESA+ 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 MAX6190CESA+ meets industry standards.
7.What is the process for return or replacement of MAX6190CESA+?
All MAX6190CESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6190CESA+, 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 MAX6190CESA+ part is unused and in its original packaging.
Return procedure for MAX6190CESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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