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Analog Devices Inc./Maxim Integrated MAX983CUA-T
- Part No.:
- MAX983CUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX983CUA-T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,891
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Product details
Overview
MAX983CUA-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, features input range from V− to (V+ − 1.3V), and draws ≤4µA supply current over temperature. It is used in battery-powered threshold detectors and window comparators requiring rail-to-rail input and level translation.
For engineers reviewing the MAX983CUA-T datasheet, MAX983CUA-T pinout, MAX983CUA-T application, or MAX983CUA-T equivalent, this page delivers verified specifications, functional pin roles, real-world use cases in power-good monitoring and battery switchover circuits, and validated alternative parts for design flexibility under low-quiescent-current constraints.
Technical Context
The MAX983CUA-T integrates two independent 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 bipolar-to-single-ended level shifting.
It uses micropower architecture with <4µA quiescent current across −40°C to +85°C, 12µs propagation delay at 10mV overdrive, and guaranteed input common-mode range extending to within 1.3V of V+. The reference output (REF) is referenced to V− and rated ±2% over 0°C to +70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single 2.5V–11V or dual ±1.25V–±5.5V - supports both battery-powered and split-rail industrial sensing |
| Quiescent Supply Current | ≤4µA max over temperature - enables multi-year operation on coin-cell batteries |
| Reference Voltage Accuracy | 1.182V ±2% (0°C to +70°C) - sets stable threshold baseline for precision undervoltage/overvoltage detection |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows direct sensing of signals near supply rails without attenuation |
| Propagation Delay | 12µs typical (10mV overdrive) - balances speed and ultra-low power for wake-up and alert functions |
| Output Type | Open-drain, sinks to V− - enables wire-ORing, level translation, and compatibility with mixed-voltage logic |
| Hysteresis Control | HYST pin with REF–50mV to REF range - permits precise, resistor-set hysteresis bands up to 100mV without op-amp feedback |
Pinout & Package
MAX983CUA-T is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard SO and DIP footprints. The package supports reflow soldering and is rated for commercial temperature range (0°C to +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUTA | Comparator A open-drain output | Sinks current to V−; requires external pullup for logic-level output; enables wired-OR with other comparators |
| 2 - V− | Negative supply | Connect to GND for single-supply operation; defines reference point for REF and input common-mode range |
| 3 - INA+ | Noninverting input of Comparator A | Accepts signals from V− to (V+ − 1.3V); high-impedance (±0.01nA leakage) for minimal loading |
| 4 - INB− | Inverting input of Comparator B | Paired with INB+ to form second independent comparator channel; identical electrical specs to INA± |
| 5 - HYST | Hysteresis control input | Accepts voltage from (REF − 50mV) to REF; sets symmetric hysteresis band around comparator threshold |
| 6 - REF | Internal reference output | 1.182V ±2% w.r.t. V−; sources/sinks up to 25µA/15µA; must not be bypassed |
| 7 - V+ | Positive supply | Accepts 2.5V–11V (single) or ±1.25V–±5.5V (dual); total supply voltage ≤11V |
| 8 - OUTB | Comparator B open-drain output | Functionally identical to OUTA; allows independent or coordinated (wired-OR) output signaling |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | ≤4µA over full temperature range - extends battery life in portable medical and IoT sensors |
| Dual comparator + reference integration | Single 8-pin µMAX replaces discrete comparator + reference + hysteresis resistors - reduces BOM count and PCB area |
| Programmable hysteresis via HYST pin | Eliminates need for external positive-feedback networks - simplifies layout and improves noise immunity in noisy environments |
| Wide supply voltage range | Operates down to 2.5V single supply or ±1.25V dual supply - supports legacy and low-voltage system designs |
| Open-drain outputs sinking to V− | Enables level translation between ±5V analog domains and 3.3V/5V digital logic - critical for mixed-signal interface applications |
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. IC Role / Device Role / Timing Role: MAX983CUA-T Comparator A detects adapter failure; Comparator B monitors battery voltage; REF provides stable threshold reference. Use Value: Eliminates diode voltage drop and power loss; enables clean, low-quiescent switchover in portable instrumentation and handheld test equipment. |
Use Scenario: Validating that a 5V system supply remains within safe operating window (4.5V–5.5V) before enabling downstream logic. IC Role / Device Role / Timing Role: MAX983CUA-T configured as window comparator - OUTA asserts low on undervoltage, OUTB low on overvoltage; wired-OR yields active-high POWER_GOOD. Use Value: Prevents brownout-induced MCU resets; hysteresis programmed via HYST pin avoids chatter near thresholds. |
| Low-Power Threshold Alert | Level Translation Interface |
Use Scenario: Detecting when a sensor output crosses a fixed threshold (e.g., smoke detector ion chamber current) in always-on wearable devices. IC Role / Device Role / Timing Role: MAX983CUA-T Comparator A compares sensor signal against REF-derived threshold; HYST pin adds noise margin. Use Value: Draws only 4µA continuously - enables >5-year operation on CR2032; open-drain output interfaces directly to microcontroller wake-up pin. |
Use Scenario: Converting ±5V analog signals (e.g., from op-amp stages) into 3.3V logic-compatible levels for ADC input or FPGA I/O. IC Role / Device Role / Timing Role: MAX983CUA-T used with external pullup to 3.3V; V− tied to −5V rail; OUTA/OUTB sink to V−, translating bipolar swing to unipolar logic. Use Value: No external level-shifter IC required; preserves signal integrity and timing; supports rail-to-rail input without clamping diodes. |
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 |
|---|---|---|---|
| MAX982CUA-T | Identical pinout, package, and electrical specs; differs only in internal reference tolerance (±2%) and hysteresis capability - functionally interchangeable with MAX983CUA-T | Same window detection, battery switchover, and level-shifting use cases; no redesign needed | Select MAX982CUA-T if sourcing flexibility or alternate date code availability is required; identical qualification and performance. |
| TLV3702IDR | Lower reference accuracy (no integrated reference), higher supply current (1.6µA vs. 4µA max), rail-to-rail inputs, push-pull output - lacks HYST pin and REF output | Requires external reference and hysteresis circuitry; unsuitable for space-constrained or ultra-low-power designs relying on internal REF | Choose TLV3702IDR only when push-pull output or wider supply range (up to 16V) is mandatory and board area/power budget allow added components. |
Compared with MAX982CUA-T, the MAX983CUA-T offers identical functionality and qualification - making it a direct sourcing alternative. Against TLV3702IDR, MAX983CUA-T delivers integrated reference, programmable hysteresis, and lower max supply current, reducing component count and power in compact, battery-sensitive systems.
Availability
MAX983CUA-T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, level translators, and oscillator circuits requiring stable component supply across industrial and medical OEM programs.
Supply support for MAX983CUA-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 series targets ultra-low-power comparator applications where micropower operation, integrated reference, and hysteresis simplicity are essential - especially in portable, energy-harvesting, and always-on monitoring systems.
FAQ
What is the reference voltage tolerance of the MAX983CUA-T over temperature?
The MAX983CUA-T features an internal 1.182V bandgap reference with ±2% accuracy over the commercial temperature range (0°C to +70°C). At extended temperature (−40°C to +85°C), the tolerance widens to ±3%, as specified in the Electrical Characteristics table. This reference is referenced to V−, not GND, and must not be bypassed to maintain stability and accuracy.
Can the MAX983CUA-T operate from a 1.8V single supply?
No - the MAX983CUA-T is not guaranteed to operate below 2.5V single supply (or ±1.25V dual supply). While some comparators in the MAX97x/MAX98x family (e.g., MAX974) may function down to 1V, the MAX983CUA-T's minimum specified supply is 2.5V. Operation below this risks reference dropout, increased propagation delay, and undefined hysteresis behavior.
How is hysteresis programmed on the MAX983CUA-T?
Hysteresis on the MAX983CUA-T 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 (REF − 50mV) to REF. For example, setting VHYST = REF − 25mV yields ~50mV hysteresis. The same hysteresis applies to both comparators.
Does the MAX983CUA-T have a GND pin?
No - the MAX983CUA-T does not include a dedicated GND pin. Its ground reference is V−, which must be connected to system ground in single-supply configurations. Unlike MAX971/MAX981 (which feature separate GND and V− pins), the MAX983CUA-T sinks output current to V−, making it suitable for dual-supply operation but requiring careful grounding in single-supply layouts.
What is the maximum output sink current for the MAX983CUA-T?
The MAX983CUA-T outputs (OUTA and OUTB) are open-drain N-channel MOSFETs sinking to V−. At V+ = 5V and IOUT = 1.8mA, the output low voltage is typically V− + 0.4V. Absolute maximum continuous sink current is not specified, but short-circuit testing shows >20mA capability at V+ = 5V. Output leakage remains ≤100nA at VOUT = 11V.
MAX983CUA-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:
- 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-uMAX/uSOP
MAX983CUA-T FAQ
1.How can I place an order for MAX983CUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX983CUA-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 MAX983CUA-T reliable?
The price and inventory of MAX983CUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX983CUA-T is usually 5 days.
3.What payment methods are accepted for MAX983CUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX983CUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX983CUA-T?
MAX983CUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX983CUA-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 MAX983CUA-T?
For technical support, including MAX983CUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX983CUA-T requirements.
6.How does Aetrix verify that MAX983CUA-T is sourced from the original manufacturer or authorized distributors?
All MAX983CUA-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 MAX983CUA-T meets industry standards.
7.What is the process for return or replacement of MAX983CUA-T?
All MAX983CUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX983CUA-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 MAX983CUA-T part is unused and in its original packaging.
Return procedure for MAX983CUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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