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Analog Devices Inc./Maxim Integrated MAX983CSA+
- Part No.:
- MAX983CSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX983CSA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
The MAX983CSA+ 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 4µA max supply current over temperature, rail-to-rail input range (V− to V+ − 1.3V), and is used in battery-powered threshold detectors and window comparators.
For engineers reviewing the MAX983CSA+ datasheet, MAX983CSA+ pinout, MAX983CSA+ application, or MAX983CSA+ equivalent, key selection criteria include its dual-comparator architecture with shared reference and hysteresis control, open-drain output compatibility with wire-OR logic, and suitability for low-voltage single-supply systems requiring <5µA quiescent current.
Technical Context
The MAX983CSA+ integrates two independent comparators sharing one internal 1.182V bandgap reference and a dedicated HYST pin for unified hysteresis programming. Its input common-mode range extends from V− to V+ − 1.3V, enabling operation near supply rails without external level-shifting.
Each comparator features open-drain output sinking to V− (not GND), supporting dual-supply configurations and bipolar-to-single-ended conversion. Propagation delay is 12µs (10mV overdrive) with 100pF load and 1MΩ pullup, and output leakage remains ≤100nA at 11V.
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 batteries and industrial ±5V rails. |
| Quiescent Supply Current | ≤4µA over temperature - enables multi-year operation on coin-cell batteries in always-on sensing nodes. |
| Reference Voltage Accuracy | 1.182V ±2% (0°C to +70°C) - provides stable threshold generation without external precision references. |
| Input Common-Mode Range | V− to V+ − 1.3V - allows direct sensing of signals referenced to negative supply or ground in mixed-rail systems. |
| Propagation Delay | 12µs (10mV overdrive, 100pF + 1MΩ) - sufficient for slow-control loops like power-good monitoring and battery switchover. |
| Output Configuration | Open-drain, sinks to V− - enables wire-ORed outputs and level translation between disparate voltage domains. |
| Input Offset Voltage | ±10mV - ensures reliable detection of ≥20mV signal margins without calibration. |
Pinout & Package
MAX983CSA+ uses an 8-pin SO (Small Outline) package with exposed pad (SOIC-N). Pin functions are validated per Maxim's official pin configuration diagram for MAX983 (DIP/SO/µMAX variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUTA | Comparator A open-drain output | Sinks current to V−; requires external pullup for logic-high assertion; supports wired-OR with other open-drain devices. |
| 2 - V− | Negative supply terminal | Connect to GND for single-supply use; defines reference point for REF, IN+, IN−, and HYST inputs. |
| 3 - INA+ | Noninverting input of Comparator A | Accepts signals from V− to V+ − 1.3V; high-impedance (±0.01nA leakage) minimizes loading on sensor sources. |
| 4 - INB− | Inverting input of Comparator B | Paired with INB+ (Pin 6) to form second comparator; identical electrical specs to INA+ and INA−. |
| 5 - HYST | Hysteresis control input | Accepts voltage from REF − 50mV to REF; sets hysteresis band width (up to 100mV) without external feedback components. |
| 6 - REF | Internal reference output | 1.182V ±2% w.r.t. V−; capable of sourcing 25µA/sinking 15µA; must not be bypassed. |
| 7 - V+ | Positive supply terminal | Accepts 2.5V–11V single or ±1.25V–±5.5V dual supply; powers internal reference and comparator core. |
| 8 - OUTB | Comparator B open-drain output | Functionally identical to OUTA; enables independent or coordinated dual-threshold decisions (e.g., window detection). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 4µA max across −40°C to +85°C - eliminates need for sleep-state switching in energy-harvesting systems. |
| Integrated ±2% voltage reference | 1.182V referenced to V− - removes external reference IC and associated PCB area/cost in portable designs. |
| Pin-controlled hysteresis | Single HYST pin adjusts hysteresis band for both comparators simultaneously - simplifies noise-immune threshold design vs. discrete resistor networks. |
| Wide supply range support | Operates down to 2.5V single supply or ±1.25V dual supply - compatible with legacy ±5V systems and modern 3.3V/2.5V microcontrollers. |
| Open-drain outputs sinking to V− | Enables level translation between V+ domain and lower-voltage logic - critical for interfacing analog sensors to 1.8V/3.3V I/O banks. |
Applications
| Battery-Powered Threshold Detector | Window Comparator (Undervoltage/Overvoltage) |
|---|---|
Use Scenario: Monitoring lithium-polymer battery voltage during discharge to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against upper (4.2V) and lower (3.3V) thresholds using resistor dividers and shared REF/HYST. Use Value: Eliminates external reference and reduces component count by 3–4 parts versus discrete solutions, extending runtime via 4µA quiescent draw. |
Use Scenario: Validating regulated DC supply stability in embedded systems (e.g., 5V rail must stay within 4.5V–5.5V). IC Role / Device Role / Timing Role: MAX983CSA+ implements window detection with hysteresis: OUTA asserts low below 4.5V, OUTB low above 5.5V; wired-OR yields active-high "power good". Use Value: Single IC replaces two comparators + reference + hysteresis resistors, reducing layout area by >40% and improving thermal tracking of thresholds. |
| Level Translator (±5V to 3.3V Logic) | Battery Switchover Control |
Use Scenario: Converting analog signals from ±5V op-amp stages to 3.3V microcontroller ADC inputs. IC Role / Device Role / Timing Role: Comparator A compares input against 0V (via REF = 1.182V and resistor divider), generating clean 3.3V-compatible digital output. Use Value: Open-drain outputs pulled to 3.3V enable safe interfacing without level-shifter ICs; rail-to-rail inputs accept full ±5V swing directly. |
Use Scenario: Seamless transition from wall adapter to backup battery when main supply drops below 4V. IC Role / Device Role / Timing Role: Comparator A monitors adapter voltage; its OUTA drives P-MOSFET gate to enable battery path. Comparator B independently checks battery health. Use Value: Dual comparators with shared reference ensure synchronized switchover timing and eliminate mismatch-induced glitches during transition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX982CSA+ | Identical pinout, same 1.182V ±2% reference and HYST functionality; differs only in internal routing (INB+ on Pin 6 vs. Pin 3 in MAX983). | Same window detector and threshold applications; MAX982 uses INB+ on Pin 6, MAX983 on Pin 3 - requires PCB layout verification if swapping. | Select MAX982CSA+ only if existing design uses INB+ on Pin 6; otherwise MAX983CSA+ offers preferred pin assignment for symmetric layout. |
| TLV3702IDR | Lower 1.2µA typical supply current but no integrated reference; requires external 1.2V reference and hysteresis resistors. | Suitable for ultra-low-power designs where reference voltage is already available; not drop-in for REF/HYST-based circuits. | Choose TLV3702IDR when minimizing current is paramount and system-level reference exists; avoid if board space or BOM count reduction is priority. |
Compared with MAX982CSA+, MAX983CSA+ offers identical performance but optimized pin mapping for window comparator layouts; versus TLV3702IDR, it trades 2.8µA higher typical current for integrated reference and hysteresis control-reducing total solution size by ≥3 components.
Availability
MAX983CSA+ is available at Aetrix Electronics and suitable for battery-powered systems, power-supply monitoring, and industrial sensor interfaces requiring stable component supply with guaranteed long-term availability.
Supply support for MAX983CSA+ 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 MAX98x series targets ultra-low-power comparator applications where micropower operation, integrated reference, and hysteresis control are essential - specifically engineered for portable and energy-constrained systems.
FAQ
What supply voltage ranges does the MAX983CSA+ support?
The MAX983CSA+ operates from a single 2.5V to 11V supply or dual ±1.25V to ±5.5V supplies. When used in single-supply mode, connect V− to GND. The input common-mode range extends from V− to V+ − 1.3V, and absolute maximum ratings allow V+ to V− up to 12V. This makes MAX983CSA+ suitable for both 3.3V IoT nodes and legacy ±5V instrumentation systems.
Does the MAX983CSA+ have an internal voltage reference, and what is its accuracy?
Yes, the MAX983CSA+ includes an internal 1.182V bandgap reference output on Pin 6 (REF), accurate to ±2% over 0°C to +70°C (Commercial grade). The reference is referenced to V−, not GND, and can source up to 25µA or sink 15µA. It must not be bypassed with capacitors, as this degrades noise performance. This integrated reference eliminates the need for external precision references in most threshold-detection applications.
How is hysteresis implemented on the MAX983CSA+?
Hysteresis on the MAX983CSA+ is controlled via the HYST pin (Pin 5), which accepts a voltage from REF − 50mV to REF. The hysteresis band (difference between upper and lower thresholds) is approximately twice the voltage difference between REF and HYST - up to 100mV maximum. Unlike external positive-feedback methods, this approach draws negligible current and applies identically to both comparators, simplifying window-detector design without additional resistors or layout complexity.
What is the output structure of the MAX983CSA+, and how should it be used?
The MAX983CSA+ features two open-drain outputs (OUTA on Pin 1, OUTB on Pin 8), each sinking current to V− (not GND). This architecture enables wire-OR configurations and level translation - for example, pulling OUTA to 3.3V while V+ = 5V. An external pullup resistor is mandatory; typical values range from 10kΩ to 1MΩ depending on speed and drive requirements. Output leakage is ≤100nA at 11V, ensuring clean logic states in high-impedance systems.
Can the MAX983CSA+ operate from a 1.8V supply?
No, the MAX983CSA+ has a guaranteed minimum single-supply operating voltage of 2.5V. While some members of the MAX97x/MAX98x family (e.g., MAX974) may function marginally below 2.5V, the MAX983CSA+ is not characterized or specified for operation below 2.5V. Attempting to power it from 1.8V will result in undefined behavior, including failure of the internal reference and unreliable comparator output states. For sub-2.5V applications, consider purpose-built nanowatt comparators such as the TLV3691.
MAX983CSA+ 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
MAX983CSA+ FAQ
1.How can I place an order for MAX983CSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX983CSA+ 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 MAX983CSA+ reliable?
The price and inventory of MAX983CSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX983CSA+ is usually 5 days.
3.What payment methods are accepted for MAX983CSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX983CSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX983CSA+?
MAX983CSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX983CSA+ 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 MAX983CSA+?
For technical support, including MAX983CSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX983CSA+ requirements.
6.How does Aetrix verify that MAX983CSA+ is sourced from the original manufacturer or authorized distributors?
All MAX983CSA+ 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 MAX983CSA+ meets industry standards.
7.What is the process for return or replacement of MAX983CSA+?
All MAX983CSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX983CSA+, 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 MAX983CSA+ part is unused and in its original packaging.
Return procedure for MAX983CSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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