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Analog Devices Inc./Maxim Integrated MAX982CPA+
- Part No.:
- MAX982CPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX982CPA+.pdf
- Description:
- IC COMPARATOR OD 8-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,360
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Product details
Overview
MAX982CPA+ 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 is used in battery-powered threshold detectors and window comparators.
For engineers reviewing the MAX982CPA+ datasheet, MAX982CPA+ pinout, MAX982CPA+ application, or MAX982CPA+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options for low-power comparator selection in space- and energy-constrained systems.
Technical Context
The MAX982CPA+ integrates two independent micropower comparators sharing one internal bandgap reference (1.182V ±2% at 0°C to +70°C) and a dedicated HYST pin enabling simple resistor-based hysteresis programming without external feedback. Its open-drain outputs sink current 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 (10mV overdrive, 100pF load, 1MΩ pullup); output leakage is ≤100nA at 11V. The device supports true single-supply operation with V− tied to GND and maintains functionality down to 2.5V total supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single 2.5V–11V or dual ±1.25V–±5.5V - enables direct interface with 3V/5V logic and bipolar sensor signals. |
| Quiescent Supply Current | ≤4µA over temperature - sustains multi-year operation on coin-cell batteries in always-on monitoring circuits. |
| Reference Voltage Accuracy | 1.182V ±2% (0°C to +70°C) - provides stable threshold generation without external precision references. |
| Input Common-Mode Range | V− to (V+ −1.3V) - accepts inputs near ground or within 1.3V of positive rail, simplifying level-shifting design. |
| Propagation Delay | 12µs (10mV overdrive, 100pF load, 1MΩ pullup) - balances speed and power for low-frequency event detection. |
| Output Configuration | Open-drain, sinks to V− - allows wire-ORing and level translation between disparate supply domains. |
| Hysteresis Control | HYST pin with REF–0.05V to REF range - enables precise, resistor-programmable hysteresis without op-amp feedback networks. |
Pinout & Package
MAX982CPA+ uses an 8-pin plastic DIP package (0.300" wide) with through-hole mounting. Pin functions are validated per Maxim's official pin configuration diagram for MAX982 (DIP/SO/µMAX top view).
| Pin/Terminal | 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 - connect to GND for single-supply operation; defines reference point for REF and input range. |
| 3 | INA+ | Noninverting input of Comparator A - accepts signals from V− to (V+ −1.3V) with ±10mV offset. |
| 4 | INA− | Inverting input of Comparator A - paired with INA+ for differential threshold comparison. |
| 5 | HYST | Hysteresis control input - sets hysteresis band width by voltage divider from REF; range: REF −50mV to REF. |
| 6 | REF | 1.182V ±2% reference output - referenced to V−, capable of sourcing 25µA/sinking 15µA; no bypass required. |
| 7 | V+ | Positive supply - supplies gate drive for output MOSFETs; determines output sink strength and propagation delay. |
| 8 | OUTB | Comparator B open-drain output - functionally identical to OUTA; shares same REF and HYST resources. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator with shared reference | Reduces component count and board area in dual-threshold applications like window detectors. |
| Programmable hysteresis via HYST pin | Eliminates need for external feedback resistors and op-amps, cutting layout complexity and leakage paths. |
| Ultra-low 4µA supply current | Enables continuous monitoring in energy-harvesting and IoT endpoint nodes without compromising battery life. |
| Open-drain outputs sinking to V− | Supports bipolar-to-single-ended conversion and mixed-voltage system interfacing without level-shifters. |
| Wide 2.5V–11V single-supply operation | Operates across standard Li-ion, alkaline, and regulated 3.3V/5V rails without auxiliary supplies. |
Applications
| Battery Voltage Monitor | Power-Good Window Detector |
|---|---|
Use Scenario: Monitoring 3-cell Li-ion pack (9–12.6V) to trigger low-voltage shutdown and overvoltage protection. IC Role / Device Role / Timing Role: Dual comparator compares pack voltage against upper/lower thresholds derived from REF and resistor dividers. Use Value: Eliminates external reference IC and reduces quiescent current by >90% versus discrete op-amp solutions. |
Use Scenario: Validating regulated 5V supply in embedded controllers to assert "power-good" only when voltage stays within 4.75–5.25V. IC Role / Device Role / Timing Role: MAX982CPA+ implements window detection using INA+/INA− and INB+/INB− with shared REF and HYST. Use Value: Achieves <10µA total system current during monitoring, extending runtime in standby modes. |
| Low-Power Sensor Threshold Detector | Level Translator (±5V → 3.3V) |
Use Scenario: Converting analog output from MEMS accelerometer (±2V swing) into digital alert when motion exceeds preset g-threshold. IC Role / Device Role / Timing Role: Single comparator channel compares conditioned sensor signal to REF-derived threshold; HYST suppresses noise-induced chatter. Use Value: Delivers reliable edge detection at 3µA per channel - critical for wearable devices with microamp-hour budgets. |
Use Scenario: Interfacing legacy ±5V industrial sensor outputs to modern 3.3V microcontroller GPIOs. IC Role / Device Role / Timing Role: MAX982CPA+ acts as bidirectional level shifter: REF sets 1.182V threshold; open-drain outputs pulled to 3.3V. Use Value: Replaces discrete transistor translators while maintaining <5µA static current and eliminating level-shifter IC cost. |
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 |
|---|---|---|---|
| MAX983CPA+ | Identical pinout, same 1.182V ±2% reference and HYST architecture; differs only in internal routing for window-comparator topology (INA−/INB+ shared). | Optimized for window detection where both comparators monitor same input with high/low thresholds; MAX982CPA+ offers independent inputs. | Select MAX983CPA+ when building undervoltage/overvoltage detectors with shared input; choose MAX982CPA+ for fully independent dual-threshold sensing. |
| TLV3702IP | No internal reference; rail-to-rail I/O; 1.2µA supply current; 360µs propagation delay; push-pull output (not open-drain). | Requires external reference and pullup resistors; unsuitable for wire-OR or level-shifting; better for low-noise, low-offset precision apps. | Choose TLV3702IP only if push-pull output and sub-µA current are mandatory and reference integration is unnecessary. |
Compared with MAX983CPA+, MAX982CPA+ provides fully independent comparator inputs for asymmetric threshold configurations; compared with TLV3702IP, it trades higher propagation delay for integrated reference, open-drain flexibility, and proven ultra-low-power operation in battery-critical designs.
Availability
MAX982CPA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and level translators requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for MAX982CPA+ 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 communications markets.
The MAX982CPA+ belongs to Maxim's ultra-low-power comparator family targeting energy-constrained systems; it was engineered to replace discrete reference + comparator solutions with a single, guaranteed-spec, low-quiescent-current device.
FAQ
What is the maximum supply voltage for MAX982CPA+ in single-supply mode?
The MAX982CPA+ supports a single-supply voltage range of 2.5V to 11V. When operated in single-supply mode (V− tied to GND), the maximum allowable V+ is 11V. Exceeding this violates absolute maximum ratings and may cause permanent damage. The device remains functional down to 2.5V, though reference accuracy degrades below ~2.2V.
Does MAX982CPA+ have a GND pin, and how is its output referenced?
No, MAX982CPA+ does not have a GND pin. Its outputs (OUTA and OUTB) sink current to V−, not GND. In single-supply operation, V− is connected to system GND, making the output effectively GND-referenced. In dual-supply operation, V− is a negative rail (e.g., −5V), and outputs sink to that rail - enabling true bipolar-to-single-ended conversion.
Can the internal reference of MAX982CPA+ be used to bias external circuitry?
Yes, the REF pin of MAX982CPA+ provides a buffered 1.182V ±2% output referenced to V−, capable of sourcing up to 25µA and sinking up to 15µA. It is designed for direct connection to resistor dividers and HYST networks. Do not bypass REF with capacitors, as this may destabilize the reference or comparator operation.
How is hysteresis programmed on MAX982CPA+?
Hysteresis on MAX982CPA+ is programmed 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 (VREF − 50mV) to VREF. For example, setting VHYST = VREF − 25mV yields ~50mV hysteresis. No external op-amps or feedback loops are needed.
What is the input offset voltage specification for MAX982CPA+?
The input offset voltage for MAX982CPA+ is ±10mV, measured at VCM = 2.5V (5V supply) or VCM = 1.5V (3V supply), across the commercial temperature range (0°C to +70°C). This value is guaranteed in production testing and directly impacts threshold accuracy in precision detection applications.
MAX982CPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Bulk
- 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:
- Through Hole
- :
- 8-PDIP
MAX982CPA+ FAQ
1.How can I place an order for MAX982CPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX982CPA+ 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 MAX982CPA+ reliable?
The price and inventory of MAX982CPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX982CPA+ is usually 5 days.
3.What payment methods are accepted for MAX982CPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX982CPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX982CPA+?
MAX982CPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX982CPA+ 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 MAX982CPA+?
For technical support, including MAX982CPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX982CPA+ requirements.
6.How does Aetrix verify that MAX982CPA+ is sourced from the original manufacturer or authorized distributors?
All MAX982CPA+ 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 MAX982CPA+ meets industry standards.
7.What is the process for return or replacement of MAX982CPA+?
All MAX982CPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX982CPA+, 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 MAX982CPA+ part is unused and in its original packaging.
Return procedure for MAX982CPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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