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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:1,075
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Product details
Overview
The MAX982CUA+T 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 packaged in an 8-pin µMAX. It is used in battery-powered threshold detectors requiring stable low-current operation.
For engineers reviewing the MAX982CUA+T datasheet, MAX982CUA+T pinout, MAX982CUA+T application, or MAX982CUA+T equivalent, key selection criteria include its 4µA max quiescent current, ±2% reference accuracy, 12µs propagation delay (10mV overdrive), open-drain output with separate GND for level translation, and dual-comparator architecture with shared HYST/REF pins enabling window detection.
Technical Context
The MAX982CUA+T integrates two independent comparators sharing a common internal 1.182V bandgap reference and a dedicated HYST pin for user-programmable hysteresis without external feedback. Its input common-mode range extends from V− to (V+ − 1.3V), and it features open-drain outputs sinking to V− (not GND), distinguishing it from MAX971/MAX974 variants with GND-referenced outputs.
It supports single-supply operation (V− = GND) and dual-supply operation (e.g., ±5V), with absolute maximum output voltage of 11V above V−. The reference output (REF) is referenced to V−, not GND, and delivers ±2% accuracy over 0°C to +70°C - confirmed for the C-temp grade in the MAX98x series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | ≤4µA max over temperature - enables multi-year operation on coin-cell batteries in always-on sensing nodes. |
| Reference Voltage | 1.182V ±2% (0°C to +70°C) - provides stable threshold generation without external precision reference. |
| Propagation Delay | 12µs typical (10mV overdrive) - suitable for medium-speed monitoring (e.g., power-good sequencing, battery switchover). |
| Input Range | V− to (V+ − 1.3V) - supports near-rail inputs in low-voltage systems (e.g., 3V microcontroller I/O monitoring). |
| Output Type | Open-drain, sinks to V− - allows wire-ORing and level-shifting between disparate voltage domains (e.g., ±5V to 3.3V logic). |
| Hysteresis Control | HYST pin accepts 0–50mV below REF - enables precise, resistor-programmable hysteresis band up to 100mV without feedback networks. |
Pinout & Package
Package: 8-pin µMAX (3mm × 3mm, 0.8mm height, exposed pad), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Comparator A open-drain output | Sinks current to V−; requires external pull-up for logic-level output; compatible with mixed-voltage bus interfacing. |
| 2 (V−) | Negative supply / ground reference | Connect to GND for single-supply use; defines reference point for REF, HYST, and output sink node. |
| 3 (INA+) | Noninverting input of Comparator A | Accepts signals from V− to (V+ − 1.3V); high-impedance (±0.01nA leakage) for minimal loading of sensor circuits. |
| 4 (INA−) | Inverting input of Comparator A | Paired with INA+ for differential threshold comparison; identical electrical specs to INA+. |
| 5 (HYST) | Hysteresis control input | Accepts voltage from (REF − 50mV) to REF; sets hysteresis band width; no external bias required. |
| 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 dual-threshold or window detection with shared REF/HYST. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparators with shared REF/HYST | Enables compact window detector or undervoltage/overvoltage monitoring using only four external resistors and one IC. |
| Ultra-low 4µA supply current | Reduces average system power by >90% vs. standard comparators, extending shelf life of battery-backed sensors. |
| Programmable hysteresis via HYST pin | Eliminates need for external feedback resistors and op-amp stages, reducing PCB area and layout sensitivity. |
| Open-drain outputs sinking to V− | Permits direct interface to higher-voltage buses (up to 11V) while powered from low-voltage rails (e.g., 3V MCU). |
| 1.182V ±2% internal reference | Removes requirement for external precision reference IC or resistor divider, improving long-term stability and reducing BOM count. |
Applications
| Battery Voltage Monitor | Power-Good Sequencing |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during discharge to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against upper (e.g., 4.2V) and lower (e.g., 3.3V) thresholds using resistor dividers and shared REF/HYST. Use Value: Enables accurate, hysteresis-stabilized window detection with <4µA quiescent draw - critical for multi-year IoT sensor deployments. | Use Scenario: Validating stable 3.3V and 5V rails before releasing reset to microcontroller in embedded systems. IC Role / Device Role / Timing Role: One comparator monitors each rail against REF-derived thresholds; outputs wire-ORed to generate active-high POWER_GOOD signal. Use Value: Eliminates need for discrete voltage supervisors or FPGA-based monitoring, reducing cost and design complexity. |
| Level Translation Interface | Oscillator Enable Control |
Use Scenario: Converting ±5V analog comparator outputs to 3.3V logic levels for MCU GPIO input. IC Role / Device Role / Timing Role: MAX982CUA+T's open-drain outputs sink to V− (GND in single-supply mode), allowing pull-up to 3.3V while accepting ±5V input signals. Use Value: Provides bidirectional voltage domain bridging without level-shifter ICs or MOSFETs - simplifies analog front-end design. | Use Scenario: Enabling/disabling a crystal oscillator based on system activity to reduce standby power. IC Role / Device Role / Timing Role: Comparator monitors enable signal (e.g., RTC alarm pulse) and drives oscillator EN pin via open-drain output with hysteresis to prevent chatter. Use Value: Adds noise-immune, low-power enable control with <4µA overhead - improves overall system energy efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX973CUA+ | 1.182V ±1% reference; otherwise identical pinout, package, and electrical specs. | Higher reference accuracy required for precision thresholding (e.g., medical sensor trip points). | Select MAX973CUA+ when ±1% reference tolerance is mandatory; MAX982CUA+ suffices for general-purpose battery monitoring. |
| TLV3702IDR | Lower supply current (1.8µA), rail-to-rail I/O, but no internal reference or HYST pin; SOIC-8 package. | Requires external reference and hysteresis circuitry; better for ultra-low-IQ designs where reference is already available. | Choose TLV3702IDR only if system already includes a precision reference and layout space permits external hysteresis components. |
Compared with MAX973CUA+, the MAX982CUA+ trades ±1% reference accuracy for lower cost and sufficient stability for consumer-grade battery monitoring; compared with TLV3702IDR, it integrates reference and hysteresis control at the expense of slightly higher IQ - making it optimal for space-constrained, self-contained threshold detection.
Availability
MAX982CUA+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and level translators requiring stable component supply across industrial and consumer production programs.
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, automotive, and computing markets.
The MAX98x comparator family targets ultra-low-power, single/dual-supply sensing applications - emphasizing micropower operation (<4µA), integrated references, and flexible hysteresis for battery-critical systems.
FAQ
What is the reference voltage tolerance of the MAX982CUA+T over temperature?
The MAX982CUA+T features a 1.182V internal bandgap reference with ±2% accuracy over the commercial temperature range (0°C to +70°C). This tolerance is specified in the Electrical Characteristics table for MAX981–MAX984 devices and confirmed in the Ordering Information section for C-temp grade parts like MAX982CUA+T. The reference is referenced to V−, not GND, and must not be bypassed.
Can the MAX982CUA+T operate from a 3V single supply?
Yes, the MAX982CUA+T operates from a single 2.5V to 11V supply, including 3V. At 3V, typical supply current is 3.4µA (C-temp), input common-mode range is 0V to 1.7V, and propagation delay increases to ~12µs (10mV overdrive). Performance remains fully specified per the 3V Electrical Characteristics tables in the datasheet.
How is hysteresis implemented on the MAX982CUA+T?
Hysteresis on the MAX982CUA+T is implemented via 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. This method applies identical hysteresis to both comparators and requires no external op-amps or feedback paths.
Does the MAX982CUA+T have separate ground pins for output and analog sections?
No - the MAX982CUA+T uses a single V− pin that serves as the negative supply, reference ground, and output sink node. Unlike MAX971/MAX974 (which feature separate GND for output transistors), MAX982CUA+T outputs sink to V−, making it suitable for single-supply operation but requiring V− to be tied to system ground when used that way.
What is the maximum output voltage the MAX982CUA+T can tolerate on its open-drain pins?
The MAX982CUA+T open-drain outputs (OUTA/OUTB) tolerate up to 11V above V−, regardless of supply voltage. This allows safe interfacing with higher-voltage buses (e.g., 5V, 12V) while powered from a lower V+/V− supply - a key enabler for level translation. Absolute maximum rating is 12V above V−, but functional operation is guaranteed to 11V.
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:
- 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
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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