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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:2,598
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Product details
Overview
The 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 low-power analog decision-making.
For engineers reviewing the MAX982CSA datasheet, MAX982CSA pinout, MAX982CSA application, or MAX982CSA equivalent, key selection criteria include its dual-comparator architecture with shared reference and hysteresis control, open-drain output compatibility with wire-OR logic, 12µs propagation delay at 10mV overdrive, and SO-8 package suitability for space-constrained industrial and portable designs.
Technical Context
The MAX982CSA integrates two independent comparators sharing a common internal 1.182V bandgap reference referenced to V−, with ±2% accuracy over 0°C to +70°C. Its HYST pin enables simple resistor-based hysteresis programming without external feedback, delivering symmetric upper/lower thresholds centered on REF.
Each comparator features rail-to-rail input operation (V− to V+ − 1.3V), open-drain NMOS output sinking to V−, and separate GND connection only for reference/grounding - unlike MAX971/MAX981 which sink to GND. Input leakage is ≤±5nA, and propagation delay is 12µs (high-to-low) at 10mV overdrive with 100pF load and 1MΩ pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single 2.5V–11V or dual ±1.25V–±5.5V - supports direct interface with Li-ion, 3.3V, and 5V systems without level-shifting. |
| Quiescent Supply Current | ≤4µA over temperature - enables multi-year operation in coin-cell–powered IoT sensors and wearables. |
| Reference Voltage Accuracy | 1.182V ±2% (0°C to +70°C) - provides stable threshold generation with predictable tolerance stack-up in precision detection circuits. |
| Propagation Delay | 12µs (high-to-low, 10mV overdrive) - suitable for medium-speed monitoring (e.g., power-good assertion, battery switchover). |
| Input Common-Mode Range | V− to V+ − 1.3V - allows direct sensing of signals near supply rails, including ground-referenced inputs in single-supply configurations. |
| Output Type | Open-drain NMOS sinking to V− - enables flexible pullup to any voltage ≤11V above V−, supporting bipolar-to-single-ended level translation. |
| Input Leakage Current | ±0.01nA to ±5nA - minimizes error in high-impedance divider networks used for voltage monitoring. |
Pinout & Package
MAX982CSA is housed in an 8-pin SO (Small Outline) package with standard .150" width and JEDEC MS-012AC outline. Pin 1 is marked by a beveled corner or dot; pin numbering follows counterclockwise convention from top-left when viewing top side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Comparator A open-drain output | Sinks current to V−; requires external pullup for logic-high state; compatible with 3.3V/5V I²C-style bus wiring. |
| 2 (V+) | Positive supply | Accepts 2.5V–11V single supply or positive rail of dual supply; powers internal reference and comparator core. |
| 3 (REF) | Reference output | Provides 1.182V ±2% referenced to V−; capable of sourcing 25µA/sinking 15µA; must not be bypassed. |
| 4 (HYST) | Hysteresis control input | Accepts voltage from REF − 50mV to REF; sets hysteresis band width (up to 100mV) via external R1/R2 divider. |
| 5 (INB−) | Inverting input of Comparator B | Differential input node; supports rail-to-rail common-mode range; low leakage preserves accuracy in high-Z dividers. |
| 6 (INB+) | Noninverting input of Comparator B | Differential input node; identical electrical characteristics to INB−; used for window or threshold comparison. |
| 7 (V−) | Negative supply | Connect to GND in single-supply mode; defines reference and output sink reference point; not tied to system GND unless required. |
| 8 (OUTB) | Comparator B open-drain output | Functionally identical to OUTA; enables independent dual-threshold decisions (e.g., undervoltage + overvoltage detection). |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparators with shared reference | Reduces component count and board area vs. discrete solutions; ensures matched reference tracking between channels. |
| Programmable hysteresis via HYST pin | Eliminates need for external positive-feedback resistors; enables precise, low-current hysteresis tuning (0–100mV band) using two resistors. |
| Ultra-low 4µA supply current | Enables continuous monitoring in energy-harvesting and battery-backed applications where µA-level sleep current is critical. |
| Open-drain outputs sinking to V− | Supports level translation across domains (e.g., ±5V input → 3.3V logic); enables wired-OR configuration for power-good or fault aggregation. |
| Rail-to-rail input voltage range | Permits direct sensing of signals from V− up to 1.3V below V+, simplifying sensor interface design without input clamping or amplification. |
Applications
| Battery Switchover Monitoring | Power-Good Window Detection |
|---|---|
Use Scenario: Automatic transition from wall adapter to backup battery when main supply drops below 4V while monitoring battery health down to 3.6V. IC Role / Device Role / Timing Role: MAX982CSA acts as dual-threshold detector: Comparator A triggers switchover; Comparator B asserts low-battery flag. Use Value: Eliminates diode voltage drop and associated power loss; enables clean, low-quiescent-current handover with hysteresis preventing chatter during brownout. | Use Scenario: Validating that a 5V system supply remains within 4.5V–5.5V window during startup and operation. IC Role / Device Role / Timing Role: MAX982CSA implements window comparator: one channel detects undervoltage (OUTA low), the other overvoltage (OUTB low); outputs wired-OR to generate active-high POWER_GOOD. Use Value: Provides fail-safe power validation with built-in hysteresis; avoids false trips during transient dips or surges near thresholds. |
| Low-Power Sensor Threshold Alert | Level Translation Interface |
Use Scenario: Detecting when a thermistor-based temperature signal crosses a fixed 1.182V reference in a coin-cell–powered environmental logger. IC Role / Device Role / Timing Role: MAX982CSA compares analog sensor output against internal REF; hysteresis prevents noise-induced toggling at threshold crossing. Use Value: Removes need for external reference IC and op-amp; achieves <4µA total system monitoring current, extending battery life to >5 years. | Use Scenario: Converting ±5V analog signals from legacy test equipment into 3.3V-compatible digital logic levels for microcontroller input. IC Role / Device Role / Timing Role: MAX982CSA functions as bipolar-to-single-ended translator: input biased to REF, output pulled to 3.3V; open-drain structure isolates voltage domains. Use Value: Enables interoperability without optocouplers or dedicated level-shifters; supports 11V max output swing relative to V−, accommodating wide input ranges. |
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 |
|---|---|---|---|
| MAX983CSA | Identical pinout, supply specs, and reference accuracy; differs only in internal hysteresis implementation - MAX983 uses window comparator topology optimized for simultaneous dual-threshold detection. | Preferred for true window detection (e.g., voltage envelope monitoring) where both comparators act on same input pair with complementary thresholds. | Select MAX983CSA when implementing a single-input window function; MAX982CSA is better for independent dual-threshold tasks (e.g., separate battery and supply monitoring). |
| TLV3702IDR | Lower reference accuracy (no internal reference), higher supply current (1.6µA typical vs. 4µA max), rail-to-rail I/O, but no HYST pin - hysteresis requires external feedback. | Suitable for cost-sensitive, non-reference-dependent designs where external hysteresis is acceptable and lower quiescent current is prioritized. | Choose TLV3702IDR only if internal reference is unnecessary and PCB layout allows feedback routing; MAX982CSA offers integrated simplicity and guaranteed reference stability. |
Compared with MAX983CSA and TLV3702IDR, the MAX982CSA uniquely balances integrated ±2% reference, programmable hysteresis via HYST, and dual independent comparators in SO-8 - making it optimal for compact, low-power dual-threshold systems where reference drift and layout complexity must be minimized.
Availability
MAX982CSA is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and level translators requiring stable component supply across industrial, medical, and portable electronics programs.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX982CSA belongs to Maxim's ultra-low-power comparator family designed specifically for energy-constrained systems needing reliable, integrated threshold detection with minimal external components and guaranteed reference stability.
FAQ
What is the reference voltage tolerance of the MAX982CSA over temperature?
The MAX982CSA features an internal 1.182V bandgap reference with ±2% accuracy over the commercial temperature range (0°C to +70°C). This tolerance is specified at the output pin (REF) referenced to V−, and applies across the full operating supply range. The MAX982CSA does not guarantee tighter tolerance at extended temperatures - for ±1% performance, consider MAX973CSA instead.
Can the MAX982CSA operate from a 1.8V single supply?
No, the MAX982CSA is not specified for 1.8V operation. Its absolute minimum single-supply voltage is 2.5V per the datasheet Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V results in degraded performance, loss of reference functionality below ~2.2V, and undefined comparator behavior - use MAX974 or MAX984 only if sub-2.5V operation is required.
How is hysteresis programmed on the MAX982CSA?
Hysteresis on the MAX982CSA is programmed using the HYST pin: connect resistor 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. For example, setting VHYST = REF − 25mV yields ~50mV hysteresis. The MAX982CSA datasheet provides exact equations for R1/R2 based on desired VHB and REF source current limits.
Does the MAX982CSA have separate ground pins for analog and digital sections?
No, the MAX982CSA does not feature separate analog/digital ground pins. It has a single V− pin serving as the negative supply and reference ground for both comparators and the internal reference. Unlike MAX971/MAX981, the MAX982CSA outputs sink to V− (not GND), so system GND and V− must be connected in single-supply configurations - no isolated ground partitioning is supported.
What is the maximum output sink current capability of the MAX982CSA?
The MAX982CSA output transistors are rated for continuous sink current up to 50mA per channel (OUTA or OUTB) when VOUT = V− + 0.4V and V+ = 5V. At lower supply voltages (e.g., 3V), sink capability decreases - typical values are 0.8mA at VOL = 0.4V with 3V supply. The absolute maximum rating for short-circuit duration is continuous, but thermal limits apply per package derating curves.
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:
- 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-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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