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Analog Devices Inc./Maxim Integrated MAX982CUA-T
- Part No.:
- MAX982CUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX982CUA-T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,115
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Product details
Overview
The MAX982CUA-T from Maxim Integrated is a dual ultra-low-power open-drain comparator with integrated 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 range (V− to V+ − 1.3V), and targets battery-powered threshold detection and level translation.
For engineers reviewing the MAX982CUA-T datasheet, MAX982CUA-T pinout, MAX982CUA-T application, or MAX982CUA-T equivalent, this page delivers verified functional identity, confirmed µMAX-8 package mapping, validated dual-comparator + reference architecture, exact hysteresis implementation method, and real-world timing and noise performance under 3V/5V operation.
Technical Context
The MAX982CUA-T integrates two independent comparators sharing one 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 to V−, not GND, distinguishing it from MAX971/MAX974 variants.
Input common-mode range extends from V− to (V+ − 1.3V); propagation delay is 12µs (high-to-low, 10mV overdrive, 100pF load, 1MΩ pullup); output leakage is ≤100nA at 11V. Reference output sources up to 25µA and sinks up to 15µA, with 100µVRMS noise (100Hz–100kHz).
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 systems and bipolar rails without level-shifting circuitry. |
| Quiescent Current | ≤4µA max over temperature - ensures multi-year battery life in always-on sensor nodes and portable devices. |
| Reference Accuracy | 1.182V ±2% (0°C to +70°C) - provides stable threshold for precision undervoltage/overvoltage detection without external reference. |
| Propagation Delay | 12µs (high-to-low, 10mV overdrive) - supports medium-speed window detection and oscillator circuits up to ~50kHz. |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows direct sensing of signals near supply rails, e.g., battery voltage monitoring down to 0.3V above V−. |
| Output Configuration | Open-drain, sinks to V− - enables wire-ORing, level translation between disparate voltage domains (e.g., ±5V to 3.3V), and bipolar-to-single-ended conversion. |
| HYST Pin Function | Accepts REF − 50mV to REF - permits precise hysteresis tuning (up to 100mV band) using two resistors, eliminating need for external op-amp feedback networks. |
Pinout & Package
MAX982CUA-T is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard SO-8 and DIP-8 footprints but with reduced board area. The package features exposed pad for thermal enhancement and is RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-drain output - sinks current to V−; requires external pullup for logic-level output. |
| 2 | V− | Negative supply rail - connect to GND for single-supply operation; defines reference point for REF and output sink. |
| 3 | INA+ | Noninverting input of Comparator A - accepts signals from V− to (V+ − 1.3V); high-impedance (±0.01nA leakage). |
| 4 | INB− | Inverting input of Comparator B - identical electrical specs to INA+; enables independent dual-threshold configuration. |
| 5 | HYST | Hysteresis control input - sets hysteresis band width by voltage difference from REF; range: REF − 50mV to REF. |
| 6 | REF | 1.182V ±2% reference output - referenced to V−, not GND; sources/sinks up to 25µA/15µA; no bypass capacitor required. |
| 7 | V+ | Positive supply rail - supports up to 11V total supply; determines input common-mode upper limit and output sink strength. |
| 8 | OUTB | Comparator B open-drain output - functionally identical to OUTA; allows independent control of two decision paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference integration | Reduces BOM count and PCB area vs. discrete comparator + external reference; eliminates matching drift between components. |
| Programmable hysteresis via HYST pin | Enables precise, low-component-count hysteresis (up to 100mV band) without feedback resistors or op-amps - simplifies window detector design. |
| Ultra-low 4µA supply current | Supports >10-year battery life in coin-cell–powered IoT sensors and wearables operating at 3V with periodic wake-up cycles. |
| Open-drain outputs sinking to V− | Permits level translation across non-matching voltage domains (e.g., ±5V analog front-end to 3.3V MCU I/O) without additional transistors. |
| Wide input common-mode range | Allows direct monitoring of battery voltage, supply rails, or sensor outputs without resistor dividers or rail-splitting networks. |
Applications
| Battery Voltage Monitoring | Power-Good Window Detection |
|---|---|
|
Use Scenario: Continuous monitoring of Li-ion or alkaline battery voltage in portable medical devices to trigger low-battery alerts and graceful shutdown. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against upper (e.g., 4.2V) and lower (e.g., 3.0V) thresholds derived from REF; HYST pin adds 50mV hysteresis per threshold. Use Value: Eliminates need for ADC and firmware polling; achieves <1µA system standby current with hardware-based autonomous response. |
Use Scenario: Validating stable DC supply in industrial controllers before enabling FPGA configuration or motor startup sequences. IC Role / Device Role / Timing Role: MAX982CUA-T configured as window detector (via INB+/INB− and INA+/INA−) asserts "power-good" only when input is within 4.75V–5.25V band. Use Value: Prevents brown-out failures by ensuring supply stability prior to critical operations; hysteresis avoids chatter near threshold boundaries. |
| Level Translation Interface | Oscillator & Timing Circuit |
|
Use Scenario: Interfacing legacy ±5V RS-232 or analog sensor outputs to modern 3.3V microcontrollers in test equipment. IC Role / Device Role / Timing Role: Uses REF as reference and open-drain outputs pulled to 3.3V to convert bipolar inputs into clean single-ended logic levels. Use Value: Replaces discrete transistor-based level shifters; maintains signal integrity with <12µs propagation delay and no shoot-through risk. |
Use Scenario: Generating precise clock signals in ultra-low-power data loggers where crystal oscillators consume too much current. IC Role / Device Role / Timing Role: Configured as relaxation oscillator using REF, HYST, and external RC network; frequency set by R1/R2 values per datasheet equations. Use Value: Achieves ~1Hz–10kHz tunable oscillation with <4µA quiescent current - 10× lower than typical crystal oscillator modules. |
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 |
|---|---|---|---|
| MAX983CUA | Identical pinout, same 1.182V ±2% reference and HYST functionality; differs only in internal routing - OUTA/OUTB swap positions in window-detector configuration (Figure 1c). | Optimized for window detection where both comparators share one input node (e.g., VIN to INA+ and INB+); less flexible for independent dual-threshold use. | Select MAX983CUA only when implementing classic window comparator topology; MAX982CUA-T offers greater flexibility for separate threshold monitoring. |
| TLV3702IDR | No integrated reference; rail-to-rail input; 1.2µA supply current; 360µs propagation delay; push-pull output (not open-drain). | Requires external reference and pullup resistors for open-drain emulation; unsuitable for level translation or wire-ORing without added components. | Choose TLV3702IDR only if lowest possible supply current is critical and reference/level-shift functions are handled elsewhere in the design. |
Compared with MAX983CUA, the MAX982CUA-T provides more flexible input assignment for independent comparator use; compared with TLV3702IDR, it delivers integrated reference and true open-drain outputs - reducing component count by ≥3 and enabling direct level translation without redesign.
Availability
MAX982CUA-T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and level translators requiring stable component supply, long-lifecycle support, and guaranteed commercial-temperature (0°C to +70°C) performance.
Supply support for MAX982CUA-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 power, sensing, and interface applications in industrial, medical, and consumer systems.
The MAX982CUA-T belongs to the MAX971–MAX984 micropower comparator family, engineered specifically for ultra-low-power threshold detection and reference-stable decision-making in energy-constrained environments.
FAQ
What is the maximum supply voltage for the MAX982CUA-T?
The MAX982CUA-T supports a total supply voltage up to 11V - either as a single 2.5V–11V rail (with V− tied to GND) or dual ±1.25V–±5.5V supplies. Exceeding 11V risks permanent damage, as specified in Absolute Maximum Ratings. At 11V, output voltage swing reaches up to 11V above V−, enabling direct interfacing with higher-voltage logic families.
Does the MAX982CUA-T require an external reference?
No, the MAX982CUA-T includes an internal 1.182V ±2% bandgap voltage reference (referenced to V−) that is fully functional without external components. The REF pin can source up to 25µA and sink up to 15µA, supporting direct connection to HYST and external divider networks. Bypassing REF is explicitly discouraged per datasheet guidance.
How is hysteresis implemented on the MAX982CUA-T?
Hysteresis on the MAX982CUA-T is implemented using the HYST pin: connect R1 between REF and HYST, and R2 between HYST and V−. The hysteresis band (VHB) ≈ 2 × (VREF − VHYST), with VHYST adjustable from (REF − 50mV) to REF - yielding up to 100mV total hysteresis. This method avoids external op-amps and preserves ultra-low quiescent current.
What is the output stage configuration of the MAX982CUA-T?
The MAX982CUA-T features open-drain N-channel MOSFET outputs (OUTA and OUTB) that sink current to V−, not GND. This architecture enables wire-ORing, level translation across disparate supply domains, and bipolar-to-single-ended conversion. Each output requires an external pullup resistor to the desired logic rail (e.g., 3.3V or 5V).
Can the MAX982CUA-T operate from a 3V supply?
Yes, the MAX982CUA-T is fully specified for 3V single-supply operation (V+ = 3V, V− = GND). At 3V, supply current remains ≤4µA, input common-mode range covers 0V to 1.7V, and propagation delay increases slightly to 12µs (vs. same value at 5V). All electrical characteristics in the 3V Electrical Characteristics table are guaranteed over 0°C to +70°C.
MAX982CUA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
MAX982CUA-T FAQ
1.How can I place an order for MAX982CUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX982CUA-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 MAX982CUA-T reliable?
The price and inventory of MAX982CUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX982CUA-T is usually 5 days.
3.What payment methods are accepted for MAX982CUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX982CUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX982CUA-T?
MAX982CUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX982CUA-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 MAX982CUA-T?
For technical support, including MAX982CUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX982CUA-T requirements.
6.How does Aetrix verify that MAX982CUA-T is sourced from the original manufacturer or authorized distributors?
All MAX982CUA-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 MAX982CUA-T meets industry standards.
7.What is the process for return or replacement of MAX982CUA-T?
All MAX982CUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX982CUA-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 MAX982CUA-T part is unused and in its original packaging.
Return procedure for MAX982CUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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