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Analog Devices Inc./Maxim Integrated MAX982ESA-T
- Part No.:
- MAX982ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX982ESA-T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,014
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Product details
Overview
MAX982ESA-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, and supports rail-to-rail input voltage range (V− to V+ −1.3V). It is used in battery-powered threshold detectors requiring stable low-power analog sensing.
For engineers reviewing the MAX982ESA-T datasheet, MAX982ESA-T pinout, MAX982ESA-T application, or MAX982ESA-T equivalent, key selection criteria include its dual-comparator topology with shared reference and hysteresis control, 12µs propagation delay at 10mV overdrive, open-drain output compatibility with wire-OR logic, and SO-8 package suitability for space-constrained industrial and portable designs.
Technical Context
The MAX982ESA-T integrates two independent comparators sharing a single internal bandgap reference (1.182V ±2%) referenced to V−, not GND. Its HYST pin enables simple resistor-programmed hysteresis without external feedback - voltage between REF and HYST sets the hysteresis band (max 100mV), applicable identically to both comparators.
Each comparator features rail-to-rail input operation (V− to V+ −1.3V), open-drain output sinking to V− (no separate GND pin), and operates across extended temperature (−40°C to +85°C). Supply current remains ≤4µA over full temperature range under typical 5V operation with IN+ = IN− +100mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single 2.5V–11V or dual ±1.25V–±5.5V - supports direct integration into 3V/5V systems and bipolar signal conditioning paths. |
| Supply Current (max) | 4µA over −40°C to +85°C - enables multi-year operation on coin-cell batteries in always-on monitoring circuits. |
| Reference Voltage | 1.182V ±2% (0°C to +70°C), ±3% (−40°C to +85°C) - provides stable threshold generation without external precision references. |
| Propagation Delay | 12µs at 10mV overdrive - balances speed and power for low-frequency event detection (e.g., battery undervoltage alerts). |
| Input Common-Mode Range | V− to V+ −1.3V - allows direct sensing of signals near supply rails, critical for supply monitoring in single-supply systems. |
| Output Type | Open-drain, sinks to V− - enables level translation, wired-OR logic, and interface with higher-voltage digital inputs (up to 11V). |
| Package | 8-pin SO (SOIC-N) - industry-standard footprint compatible with automated assembly and thermal management up to 471mW at +70°C. |
Pinout & Package
MAX982ESA-T is housed in an 8-pin SO (SOIC-N) package with standard .150" width. Pin 1 is OUTA, pin 2 is V+, pin 3 is INB+, pin 4 is INB−, pin 5 is HYST, pin 6 is REF, pin 7 is V−, and pin 8 is OUTB. All pins are electrically validated per Maxim's official pin description table for MAX982.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTA (Pin 1) | Comparator A open-drain output | Sinks current to V−; requires external pull-up for logic-level output - enables wired-OR configuration with other open-drain devices. |
| V+ (Pin 2) | Positive supply | Accepts 2.5V–11V single supply or positive rail of dual supply - powers internal comparator core and reference. |
| INB+ (Pin 3) | Noninverting input of Comparator B | High-impedance node (leakage ±0.01nA) - accepts analog thresholds or sensor signals without loading source. |
| INB− (Pin 4) | Inverting input of Comparator B | Matches INB+ in offset (±10mV) and CMRR (0.2–1 mV/V) - forms precision differential sensing pair with INB+. |
| HYST (Pin 5) | Hysteresis control input | Accepts voltage from REF −0.05V to REF - sets symmetric hysteresis band (max 100mV) for noise-immune switching. |
| REF (Pin 6) | Internal reference output | 1.182V ±2% w.r.t. V− - provides stable bias for thresholds; sources/sinks up to 25µA/15µA. |
| V− (Pin 7) | Negative supply | Connect to GND for single-supply use; defines reference and output sink node - eliminates need for dedicated ground pin. |
| OUTB (Pin 8) | Comparator B open-drain output | Functionally identical to OUTA - allows independent control of two decision paths (e.g., window detector upper/lower bounds). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | ≤4µA over −40°C to +85°C - extends battery life in IoT sensors and wearable health monitors. |
| Integrated ±2% voltage reference | 1.182V referenced to V− - eliminates external reference IC and associated PCB area/cost in supply-monitoring circuits. |
| Programmable hysteresis via HYST pin | 100mV max hysteresis band set by two resistors - simplifies noise-immune threshold design vs. external positive-feedback networks. |
| Rail-to-rail input range | V− to V+ −1.3V - enables direct sensing of battery voltage, regulator output, or sensor outputs without level-shifting circuitry. |
| Open-drain outputs sinking to V− | No separate GND pin required - reduces pin count and simplifies layout in dual-supply applications where V− ≠ GND. |
Applications
| Battery Voltage Monitor | Window Detector |
|---|---|
|
Use Scenario: Monitoring Li-ion battery voltage during charge/discharge cycles to trigger low-battery warning and prevent deep discharge. 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 and shared REF. Use Value: Single MAX982ESA-T replaces two discrete comparators and one reference IC, reducing BOM count and PCB area by >40%. |
Use Scenario: Detecting valid supply voltage range in microcontroller-based industrial controllers to assert POWER_GOOD signal. IC Role / Device Role / Timing Role: Comparator A detects undervoltage (OUTA low), Comparator B detects overvoltage (OUTB low); outputs wired-OR to generate active-high POWER_GOOD. Use Value: Built-in hysteresis (via HYST pin) prevents chatter near thresholds, eliminating need for external RC filtering and improving system reliability. |
| Level Translator | Oscillator Circuit |
|
Use Scenario: Converting ±5V analog signals from legacy test equipment to 3.3V logic levels for FPGA input. IC Role / Device Role / Timing Role: Comparator A compares bipolar input against REF (1.182V), generating open-drain output pulled to 3.3V - translating negative/positive swings to digital high/low. Use Value: Output swing up to 11V above V− allows interfacing with diverse logic families without level-shifter ICs. |
Use Scenario: Building low-power relaxation oscillator for timing pulses in energy-harvesting sensor nodes. IC Role / Device Role / Timing Role: Comparator A configured as hysteresis oscillator with capacitor charging through resistor and discharging via open-drain output. Use Value: Ultra-low 4µA supply current enables oscillator duty cycling that achieves >10-year battery life at 1Hz update rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX983ESA-T | Same pinout, same 1.182V ±2% reference, but configured as window comparator (INA+/INB− shared, INA−/INB+ shared) - no independent INB+/INB− inputs. | Optimized for single-input window detection (e.g., supply rail monitoring), not dual independent thresholds. | Select MAX983ESA-T only when both comparators monitor the same input signal with different thresholds; MAX982ESA-T is required for independent signal channels. |
| TLV3702IDR | Lower supply current (1.8µA typ), rail-to-rail I/O, but no integrated reference - requires external voltage divider or reference for threshold setting. | Better for ultra-low-power designs where reference is already available; unsuitable for reference-free compact designs. | Choose TLV3702IDR when system-level reference exists and <2µA supply current is mandatory; MAX982ESA-T preferred when minimizing external components is critical. |
Compared with MAX983ESA-T and TLV3702IDR, the MAX982ESA-T uniquely delivers dual independent comparators with integrated ±2% reference and HYST-controlled hysteresis in SO-8 - enabling compact, self-contained threshold detection without external passive or active components.
Availability
MAX982ESA-T 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 MAX982ESA-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 communications markets.
The MAX982ESA-T belongs to Maxim's ultra-low-power comparator family, engineered specifically for energy-constrained applications such as portable medical devices, remote sensors, and backup power supervision - where micropower operation and integrated reference reduce system complexity.
FAQ
What is the maximum supply voltage for MAX982ESA-T?
The MAX982ESA-T supports a total supply voltage up to 11V - either as a single 2.5V–11V supply or dual ±1.25V–±5.5V supplies. Absolute maximum rating is +12V across V+ to V−, but functional operation is specified only up to 11V. Exceeding this may cause permanent damage or parametric shift.
Does MAX982ESA-T have a built-in voltage reference, and what is its accuracy?
Yes, the MAX982ESA-T includes an internal 1.182V bandgap reference referenced to V−. Its accuracy is ±2% over 0°C to +70°C and ±3% over −40°C to +85°C. The reference can source up to 25µA and sink up to 15µA, sufficient to drive typical resistor-divider networks for threshold setting.
How is hysteresis implemented on MAX982ESA-T?
Hysteresis on the MAX982ESA-T is implemented via the HYST pin: connect R1 between REF and HYST, and R2 between HYST and V−. The hysteresis band equals twice the voltage difference between REF and HYST, with a maximum of 100mV. This method applies identical hysteresis to both comparators without external feedback components.
What is the input common-mode voltage range for MAX982ESA-T?
The input common-mode voltage range for MAX982ESA-T is from V− to V+ −1.3V. This allows inputs to operate within 1.3V of the positive rail - critical for monitoring supply voltages or sensor outputs near V+ without external level-shifting circuitry.
Can MAX982ESA-T be used in dual-supply configurations?
Yes, the MAX982ESA-T supports dual-supply operation from ±1.25V to ±5.5V. In this mode, V+ connects to the positive rail, V− to the negative rail, and REF remains referenced to V−. Outputs sink to V−, making it suitable for bipolar-to-single-ended conversion without level-shifting transistors.
MAX982ESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX982ESA-T FAQ
1.How can I place an order for MAX982ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX982ESA-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 MAX982ESA-T reliable?
The price and inventory of MAX982ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX982ESA-T is usually 5 days.
3.What payment methods are accepted for MAX982ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX982ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX982ESA-T?
MAX982ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX982ESA-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 MAX982ESA-T?
For technical support, including MAX982ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX982ESA-T requirements.
6.How does Aetrix verify that MAX982ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX982ESA-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 MAX982ESA-T meets industry standards.
7.What is the process for return or replacement of MAX982ESA-T?
All MAX982ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX982ESA-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 MAX982ESA-T part is unused and in its original packaging.
Return procedure for MAX982ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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