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Analog Devices Inc./Maxim Integrated MAX982CSA+
- Part No.:
- MAX982CSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX982CSA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:119
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Product details
Overview
MAX982CSA+ 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 reference and noise-immune decision logic.
For engineers reviewing the MAX982CSA+ datasheet, MAX982CSA+ pinout, MAX982CSA+ application, or MAX982CSA+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases for low-power sensing, and validated alternative comparators with documented parameter differences.
Technical Context
The MAX982CSA+ integrates two independent micropower comparators sharing one internal bandgap reference and a dedicated HYST pin enabling simple, resistor-programmable hysteresis without external feedback. Its open-drain outputs sink current to V− (not GND), supporting dual-supply operation and level translation between bipolar and single-ended domains.
Input common-mode range extends from V− to (V+ −1.3V); propagation delay is 12µs (10mV overdrive); output leakage is ≤100nA at 11V; and reference output sustains ±6µA source/sink capability across 0°C to +70°C. The device is specified for 8-pin SO package with exposed pad thermal performance.
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 Li-ion, 3.3V, and 5V systems without level shifters. |
| Quiescent Current | ≤4µA over temperature - ensures multi-year battery life in always-on sensor nodes and portable instrumentation. |
| Reference Voltage | 1.182V ±2% (0°C to +70°C) - provides stable, factory-trimmed threshold for precision undervoltage/overvoltage detection. |
| Propagation Delay | 12µs at 10mV overdrive - balances speed and power for wake-up triggers and slow-control-loop monitoring. |
| Input Common-Mode Range | V− to V+ −1.3V - allows direct sensing of signals near supply rails, e.g., battery voltage monitoring down to 0V referenced to V−. |
| Output Type | Open-drain, sinks to V− - permits wire-ORing, flexible pull-up selection, and bipolar-to-single-ended conversion. |
| Hysteresis Control | HYST pin accepts REF −0.05V to REF - enables precise, resistor-set hysteresis bands up to 100mV without op-amp feedback. |
Pinout & Package
MAX982CSA+ is housed in an 8-pin SO (Small Outline) package with standard .150" width, JEDEC MS-012AC compliant footprint, and exposed pad for thermal enhancement. Pin 1 is marked with dot or notch; pin numbering follows standard SOIC convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Comparator A open-drain output | Sinks current to V−; requires external pull-up for logic-high assertion; supports wired-OR with other open-drain outputs. |
| 2 (V−) | Negative supply | Reference node for internal reference and comparator inputs; connect to GND in single-supply mode. |
| 3 (INA+) | Noninverting input of Comparator A | Accepts signals from V− to V+ −1.3V; high-impedance (±0.01nA leakage) for minimal loading on sensor sources. |
| 4 (INA−) | Inverting input of Comparator A | Paired with INA+ for differential threshold comparison; identical input range and leakage as INA+. |
| 5 (HYST) | Hysteresis control input | Accepts voltage from REF −50mV to REF; sets hysteresis band width via two-resistor divider from REF and V−. |
| 6 (REF) | Internal reference output | 1.182V ±2% referenced to V−; capable of sourcing 6µA or sinking 4µA; must not be bypassed. |
| 7 (V+) | Positive supply | Accepts 2.5V–11V (single) or +1.25V–+5.5V (dual); powers internal circuitry and defines output high-voltage ceiling. |
| 8 (OUTB) | Comparator B open-drain output | Functionally identical to OUTA; shares same REF and HYST; enables independent dual-threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | ≤4µA max over full temperature range - eliminates need for shutdown sequencing in energy-harvesting designs. |
| Integrated ±2% voltage reference | 1.182V referenced to V− - removes external reference IC, reduces BOM count, and improves layout compactness. |
| HYST pin for programmable hysteresis | Enables precise, resistor-defined hysteresis without feedback resistors or op-amps - simplifies window detector design and improves noise immunity. |
| Wide supply voltage range | Operates from 2.5V to 11V single supply - supports direct connection to unregulated battery stacks or industrial 9–10V rails. |
| Open-drain outputs sinking to V− | Allows true dual-supply operation and level translation between ±5V analog and 3.3V digital domains without isolation components. |
Applications
| Battery Voltage Monitoring | Power-Good Window Detection |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles to trigger low-battery alerts or overvoltage cutoff. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against upper (REF × R1/(R1+R2)) and lower (REF × R3/(R3+R4)) thresholds set by resistor dividers. Use Value: Eliminates external reference and hysteresis components; 4µA supply current extends runtime in coin-cell-powered IoT sensors. | Use Scenario: Validating regulated 5V supply stability within ±5% tolerance before enabling downstream logic. IC Role / Device Role / Timing Role: MAX982CSA+ configured as window comparator with HYST-adjusted thresholds generates active-high POWER_GOOD signal via OUTA/OUTB wire-OR. Use Value: Single IC replaces discrete comparator + reference + hysteresis network; ±2% reference accuracy ensures tight 4.75V–5.25V window compliance. |
| Low-Power Oscillator Circuits | Level Translation Interface |
Use Scenario: Building relaxation oscillator for ultra-low-power timing in environmental data loggers. IC Role / Device Role / Timing Role: One comparator charges capacitor via pull-up; second comparator discharges it when threshold crossed - HYST sets oscillation frequency stability. Use Value: Propagation delay <12µs and sub-µA idle current enable kHz-range oscillation with nanowatt average power consumption. | Use Scenario: Converting ±5V analog sensor outputs to 3.3V logic-compatible signals in mixed-signal test equipment. IC Role / Device Role / Timing Role: MAX982CSA+ powered from ±5V supplies uses open-drain outputs pulled to 3.3V to translate bipolar input swings into unipolar logic levels. Use Value: Output sink to V− enables safe interfacing without level-shifter ICs or clamping diodes; 11V output voltage rating protects against transient overvoltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX972CSA+ | No internal voltage reference; no HYST pin; lower supply current (≤2.5µA) | Requires external reference and hysteresis circuitry; suited for reference-flexible, lowest-power designs | Select when reference voltage is already available elsewhere in system and absolute minimum current is critical |
| TLV3702IDR | Higher supply current (1.6µA typical); rail-to-rail input; push-pull output; no integrated reference | Delivers logic-level output without pull-up; better for driving capacitive loads directly; lacks HYST simplification | Select when fast push-pull drive and rail-to-rail input are prioritized over hysteresis integration and ultra-low IQ |
Compared with MAX982CSA+, MAX972CSA+ saves ~1.5µA but adds BOM cost and layout area for external reference/hysteresis; TLV3702IDR offers faster response and simpler output drive but requires external hysteresis design and consumes >4× more current under load.
Availability
MAX982CSA+ 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 and traceable sourcing.
Supply support for MAX982CSA+ 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 MAX982CSA+ belongs to Maxim's ultra-low-power comparator family targeting energy-constrained applications such as portable instrumentation, battery management, and always-on monitoring systems where µA-level quiescent current and integrated reference are essential.
FAQ
What is the maximum supply voltage for MAX982CSA+ in single-supply operation?
The MAX982CSA+ supports a single-supply voltage range of 2.5V to 11V. At 11V, the device maintains full functionality including reference regulation and comparator operation. Absolute maximum rating is 12V, but operation above 11V is not guaranteed. For reliable long-term use, keep V+ ≤11V with V− tied to GND in single-supply configurations.
Does MAX982CSA+ require external hysteresis components?
No - MAX982CSA+ includes a dedicated HYST pin that enables programmable hysteresis using just two external resistors (R1 from REF to HYST, R2 from HYST to V−). This eliminates the need for positive-feedback networks or additional op-amps. The hysteresis band is adjustable up to 100mV, and the same setting applies to both comparators inside MAX982CSA+.
Can MAX982CSA+ operate from dual ±3V supplies?
Yes - MAX982CSA+ is fully specified for dual-supply operation from ±1.25V to ±5.5V. With ±3V supplies (V+ = +3V, V− = −3V), the internal reference remains 1.182V above V− (i.e., −1.818V relative to GND), and inputs accept signals from −3V to +1.7V. Outputs sink to V− (−3V), enabling true bipolar-to-unipolar translation when pulled up to a separate logic rail.
What is the output voltage range of MAX982CSA+?
The open-drain outputs of MAX982CSA+ have a voltage range of 0V to 11V above V−. When V− = GND, outputs swing from 0V to 11V; when V− = −5V, outputs swing from −5V to +6V. The output transistor can tolerate up to 12V across drain-source, and short-circuit current is continuous-rated. Pull-up voltage must not exceed V+ + 0.3V.
Is the internal reference of MAX982CSA+ referenced to GND or V−?
The internal 1.182V reference of MAX982CSA+ is explicitly referenced to V−, not GND. In single-supply operation (V− = GND), REF = 1.182V. In dual-supply operation (e.g., V+ = +5V, V− = −5V), REF = −3.818V relative to GND. All comparator inputs and HYST are also referenced to V−, ensuring consistent threshold behavior across supply configurations.
MAX982CSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
MAX982CSA+ FAQ
1.How can I place an order for MAX982CSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX982CSA+ 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 MAX982CSA+ reliable?
The price and inventory of MAX982CSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX982CSA+ is usually 5 days.
3.What payment methods are accepted for MAX982CSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX982CSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX982CSA+?
MAX982CSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX982CSA+ 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 MAX982CSA+?
For technical support, including MAX982CSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX982CSA+ requirements.
6.How does Aetrix verify that MAX982CSA+ is sourced from the original manufacturer or authorized distributors?
All MAX982CSA+ 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 MAX982CSA+ meets industry standards.
7.What is the process for return or replacement of MAX982CSA+?
All MAX982CSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX982CSA+, 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 MAX982CSA+ part is unused and in its original packaging.
Return procedure for MAX982CSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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