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Analog Devices Inc./Maxim Integrated MAX983CUA+
- Part No.:
- MAX983CUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX983CUA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,883
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Product details
Overview
The MAX983CUA+ from Maxim Integrated is a dual ultra-low-power open-drain comparator with internal 1.182V ±2% voltage reference and programmable hysteresis via HYST pin. It operates from single 2.5V–11V or dual ±1.25V–±5.5V supplies, draws ≤4µA supply current over temperature, supports rail-to-rail input down to V− and within 1.3V of V+, and is used in battery-powered threshold detectors and window comparators.
For engineers reviewing the MAX983CUA+ datasheet, MAX983CUA+ pinout, MAX983CUA+ application, or MAX983CUA+ equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-comparator operation with shared reference and hysteresis control, and real-world design context for low-voltage, low-power sensing circuits.
Technical Context
The MAX983CUA+ integrates two independent comparators sharing a common internal bandgap reference (1.182V ±2% at 0°C to +70°C) and a dedicated HYST pin enabling user-programmable hysteresis without external feedback. Its open-drain outputs sink current to V−, not GND, distinguishing it from MAX971/MAX981 variants.
Input common-mode range extends from V− to (V+ − 1.3V); propagation delay is 12µs (10mV overdrive, 100pF load, 1MΩ pullup); output leakage is ≤100nA at 11V. The device supports true dual-supply operation with separate V+ and V− pins, and its µMAX-8 package enables compact placement in space-constrained portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single 2.5V–11V or dual ±1.25V–±5.5V - enables direct use in 3V/5V battery systems and bipolar signal conditioning. |
| Quiescent Supply Current | ≤4µA over temperature - ensures multi-year operation on coin-cell batteries in always-on monitoring nodes. |
| Reference Voltage Accuracy | 1.182V ±2% (0°C to +70°C) - provides stable threshold generation without external precision reference. |
| Input Common-Mode Range | V− to (V+ − 1.3V) - supports detection near supply rails, critical for undervoltage/overvoltage supervision. |
| Propagation Delay | 12µs (10mV overdrive, 100pF load, 1MΩ pullup) - balances speed and power for wake-up and alert triggering. |
| Output Configuration | Open-drain, sinks to V− - allows wire-ORing, level translation between disparate supply domains, and bipolar-to-single-ended conversion. |
| Hysteresis Control | HYST pin accepts REF − 50mV to REF - enables precise, resistor-programmable hysteresis band up to 100mV without feedback network. |
Pinout & Package
Package: 8-pin µMAX (3mm × 3mm, 0.8mm height), lead-free, RoHS-compliant, thermal pad exposed on bottom.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Comparator A open-drain output | Sinks current to V−; requires external pullup for logic-level output; enables wired-OR with other open-drain devices. |
| 2 (V−) | Negative supply / reference ground | Reference point for REF, HYST, and comparator inputs; connect to system ground in single-supply mode. |
| 3 (INA+) | Noninverting input of Comparator A | Accepts signals from V− to (V+ − 1.3V); high-impedance (±0.01nA leakage) minimizes loading on sensor sources. |
| 4 (INB−) | Inverting input of Comparator B | Paired with INB+ (Pin 6) for second independent comparison; identical electrical specs to INA+/INA−. |
| 5 (HYST) | Hysteresis control input | Accepts voltage from (REF − 50mV) to REF; sets hysteresis band width; connect to REF if unused. |
| 6 (REF) | Internal 1.182V reference output | Referenced to V−, not GND; sources/sinks up to 25µA/15µA; must not be bypassed or loaded beyond spec. |
| 7 (V+) | Positive supply | Accepts 2.5V–11V single supply or positive rail of dual supply; powers internal reference and comparator cores. |
| 8 (OUTB) | Comparator B open-drain output | Functionally identical to OUTA; enables independent dual-threshold detection (e.g., window comparator). |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator with shared reference | Reduces component count and board area vs. discrete solutions; REF pin serves both comparators without external buffering. |
| Programmable hysteresis via HYST pin | Eliminates need for external feedback resistors and op-amp stages; enables precise, low-current hysteresis tuning with just two resistors. |
| Ultra-low 4µA quiescent current | Extends battery life in IoT sensors and wearables; maintains full functionality across −40°C to +85°C industrial range. |
| Open-drain outputs sinking to V− | Supports level-shifting between different supply domains (e.g., ±5V input to 3.3V logic) and robust wired-OR alarm aggregation. |
| Rail-to-rail input capability | Enables direct interface with battery voltage monitors, thermistor dividers, and other analog sources operating near supply limits. |
Applications
| Threshold Detector | Window Comparator |
|---|---|
Use Scenario: Monitoring lithium-ion battery voltage to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against upper (e.g., 4.2V) and lower (e.g., 3.0V) thresholds using resistor dividers tied to REF. Use Value: Eliminates external reference and reduces BOM count by 3–4 components versus discrete comparator + reference solution. | Use Scenario: Validating regulated 5V supply stays within 4.75V–5.25V tolerance during startup and load transients. IC Role / Device Role / Timing Role: MAX983CUA+ configured as window detector: OUTA asserts low below lower threshold, OUTB asserts low above upper threshold; outputs wired-OR to generate active-high POWER_GOOD. Use Value: Achieves <12µs response to out-of-window events while consuming <4µA - critical for fast-fail safety systems. |
| Battery Switchover Control | Level Translator |
Use Scenario: Seamless transition from wall adapter to backup battery in portable medical devices. IC Role / Device Role / Timing Role: One comparator monitors adapter voltage; second monitors battery voltage; outputs drive P-MOSFET gate and low-battery LED independently. Use Value: Replaces lossy diode-OR with <0.1V drop and eliminates 100–200mW heat dissipation in linear regulators. | Use Scenario: Converting ±5V analog sensor outputs to 0–3.3V logic-compatible signals for MCU ADC input. IC Role / Device Role / Timing Role: Uses open-drain outputs and external pullups to translate bipolar input swings into unipolar digital flags or enable signals. Use Value: Enables direct interface with legacy industrial sensors without isolated DC/DC or op-amp level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator with reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX973CUA+ | Same pinout and package; internal reference accuracy ±1% (vs. ±2%); no HYST pin - hysteresis requires external feedback. | Better reference stability for precision thresholding; unsuitable where programmable hysteresis is required without layout change. | Select MAX973CUA+ when reference accuracy dominates design priority and hysteresis can be implemented externally. |
| TLV3702IDR | Single-supply only (2.7V–16V); no internal reference; push-pull output (not open-drain); 850nA supply current. | Requires external reference and pullup resistors; higher speed (1.5µs) but higher power; incompatible pinout. | Choose TLV3702IDR only when faster response is mandatory and board redesign for reference + pullups is acceptable. |
Compared with MAX973CUA+, the MAX983CUA+ trades ±1% reference accuracy for programmable hysteresis and lower cost, while TLV3702IDR offers speed at the expense of power, integration, and pin compatibility - making MAX983CUA+ optimal for cost-sensitive, battery-powered dual-threshold detection.
Availability
MAX983CUA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and level translators requiring stable component supply with guaranteed long-term availability.
Supply support for MAX983CUA+ 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 power, sensing, and interface applications in industrial, automotive, and consumer markets.
The MAX971–MAX984 family was engineered specifically for ultra-low-power sensing and supervision in portable and energy-harvesting systems, emphasizing micropower operation, integrated references, and flexible supply configurations.
FAQ
What is the maximum supply voltage for the MAX983CUA+?
The MAX983CUA+ supports a total supply voltage up to 11V - either as a single 2.5V–11V supply or dual ±1.25V–±5.5V rails. Absolute maximum ratings specify V+ to V− ≤12V and V+ to GND ≤12V. Exceeding these may cause permanent damage. The MAX983CUA+ is rated for continuous operation at 11V, with derated power dissipation above +70°C ambient.
Does the MAX983CUA+ have an internal voltage reference, and what is its accuracy?
Yes, the MAX983CUA+ includes an internal 1.182V bandgap reference referenced to V−. Its accuracy is ±2% over the commercial temperature range (0°C to +70°C), as specified in the MAX981–MAX984 series data sheet. This reference is shared by both comparators and is accessible at the REF pin (Pin 6), capable of sourcing up to 25µA and sinking up to 15µA.
Can the MAX983CUA+ operate from a single 3V supply?
Yes, the MAX983CUA+ is fully specified for single-supply operation from 2.5V to 11V. At 3V, typical supply current is 3.4µA (C temp range), input common-mode range extends from V− (0V) to 1.7V, and propagation delay remains 12µs under 10mV overdrive. All electrical characteristics - including reference output and hysteresis control - are guaranteed at 3V per the datasheet's 3V operation tables.
What is the function of the HYST pin on the MAX983CUA+?
The HYST pin (Pin 5) on the MAX983CUA+ enables resistor-programmable hysteresis without external feedback. It accepts voltages from (REF − 50mV) to REF, setting a hysteresis band up to 100mV. When used with R1 (REF to HYST) and R2 (HYST to V−), it adjusts comparator switching thresholds symmetrically - increasing noise immunity in noisy environments like motor control or switching power supply monitoring.
Is the MAX983CUA+ pin-compatible with the MAX973CUA+?
Yes, the MAX983CUA+ and MAX973CUA+ share identical µMAX-8 pinout, package dimensions, and pin functions - including OUTA, V−, INA+, INB−, HYST, REF, V+, and OUTB. However, the MAX973CUA+ has ±1% reference accuracy and no HYST pin functionality (its Pin 5 is NC), so direct substitution requires verifying hysteresis implementation and reference tolerance requirements in the target design.
MAX983CUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- with Voltage Reference
- Number of Elements:
- 2
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 11V, ±1.25V ~ 5.5V
- :
- 10mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 6µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- 50mV
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-uMAX/uSOP
MAX983CUA+ FAQ
1.How can I place an order for MAX983CUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX983CUA+ 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 MAX983CUA+ reliable?
The price and inventory of MAX983CUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX983CUA+ is usually 5 days.
3.What payment methods are accepted for MAX983CUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX983CUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX983CUA+?
MAX983CUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX983CUA+ 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 MAX983CUA+?
For technical support, including MAX983CUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX983CUA+ requirements.
6.How does Aetrix verify that MAX983CUA+ is sourced from the original manufacturer or authorized distributors?
All MAX983CUA+ 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 MAX983CUA+ meets industry standards.
7.What is the process for return or replacement of MAX983CUA+?
All MAX983CUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX983CUA+, 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 MAX983CUA+ part is unused and in its original packaging.
Return procedure for MAX983CUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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