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Analog Devices Inc./Maxim Integrated MAX973CSA+T
- Part No.:
- MAX973CSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX973CSA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,022
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Product details
Overview
MAX973CSA+T from Maxim Integrated is a dual, ultra-low-power, open-drain comparator with integrated 1.182V ±1% 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 and window comparators requiring stable low-power analog sensing.
For engineers reviewing the MAX973CSA+T datasheet, MAX973CSA+T pinout, MAX973CSA+T application, or MAX973CSA+T equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options for low-voltage comparator selection in space- and power-constrained designs.
Technical Context
The MAX973CSA+T integrates two independent micropower comparators sharing a precision 1.182V ±1% internal bandgap reference referenced to V−. Its HYST pin enables simple resistor-based hysteresis programming without external feedback-critical for noise-immune threshold detection in portable systems.
Both comparators feature open-drain outputs sinking to V− (not GND), enabling wire-OR configurations and level translation across supply domains. Input common-mode range extends from V− to V+ − 1.3V, supporting operation near supply rails in single-supply 3V/5V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single 2.5V–11V or dual ±1.25V–±5.5V - enables direct use in 3V/5V battery systems and bipolar signal conditioning. |
| Quiescent Supply Current | ≤4µA over temperature - ensures multi-year battery life in always-on monitoring applications. |
| Reference Voltage Accuracy | 1.182V ±1% (0°C to +70°C) - provides stable, factory-trimmed threshold baseline without external components. |
| Propagation Delay | 12µs at 10mV overdrive - balances speed and ultra-low power for non-critical timing decisions. |
| Input Common-Mode Range | V− to V+ − 1.3V - allows direct sensing of signals near ground or supply rails without level-shifting circuitry. |
| Output Type | Open-drain, sinks to V− - supports flexible pull-up voltages and wire-OR logic for multi-comparator systems. |
| Hysteresis Control | HYST pin accepts REF − 50mV to REF - enables precise, resistor-programmable hysteresis bands up to 100mV. |
Pinout & Package
MAX973CSA+T is housed in an 8-pin SO (Small Outline) package with gull-wing leads, JEDEC MS-012AC compliant, 150-mil body width, and standard SOIC footprint.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-drain output; sinks current to V− - used for active-low threshold alerts. |
| 2 | V− | Negative supply rail; connect to GND in single-supply mode - defines reference point for REF and output sink. |
| 3 | INA+ | Noninverting input of Comparator A - connects to sensed signal or voltage divider for positive-edge detection. |
| 4 | INA− | Inverting input of Comparator A - connects to reference or feedback node for threshold comparison. |
| 5 | HYST | Hysteresis control input; accepts voltage from REF − 50mV to REF - sets hysteresis band width via external resistors. |
| 6 | REF | 1.182V ±1% reference output referenced to V− - supplies stable voltage for thresholds and HYST programming. |
| 7 | V+ | Positive supply rail - powers internal circuitry and determines output high-level via external pull-up. |
| 8 | OUTB | Comparator B open-drain output; sinks current to V− - enables dual-threshold (e.g., window) detection with OUTA. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | ≤4µA over extended temperature - eliminates need for shutdown sequencing in energy-harvesting nodes. |
| Integrated ±1% voltage reference | 1.182V referenced to V− - removes external reference IC and associated PCB area and cost. |
| Programmable hysteresis via HYST pin | Resistor-based tuning without feedback loop - simplifies layout and avoids instability risks of external positive feedback. |
| Wide supply range support | 2.5V–11V single or ±1.25V–±5.5V dual - accommodates Li-ion, alkaline, and industrial supply rails without redesign. |
| Input range includes negative rail | V− to V+ − 1.3V - enables direct measurement of signals referenced to system ground or negative supplies. |
Applications
| Threshold Detector | Window Comparator |
|---|---|
|
Use Scenario: Monitoring battery voltage to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against upper and lower thresholds derived from REF and resistor dividers. Use Value: Eliminates external reference and reduces component count by 3–4 parts versus discrete solutions. |
Use Scenario: Validating regulated DC supply (e.g., 5V rail) stays within ±5% tolerance. IC Role / Device Role / Timing Role: MAX973CSA+T implements undervoltage (OUTA) and overvoltage (OUTB) detection; outputs wire-ORed to generate POWER_GOOD signal. Use Value: Achieves <10µA total system quiescent current while maintaining 100mV hysteresis margin. |
| Level Translator | Oscillator Circuit |
|
Use Scenario: Converting ±5V analog sensor output to 3.3V logic-compatible signal. IC Role / Device Role / Timing Role: Uses REF as bias and open-drain outputs pulled to 3.3V - shifts bipolar input to unipolar digital domain. Use Value: No level-shifter IC required; supports rail-to-rail input and avoids signal inversion errors. |
Use Scenario: Building low-power relaxation oscillator for periodic wake-up in sleep-mode microcontrollers. IC Role / Device Role / Timing Role: One comparator charges capacitor via REF; second comparator discharges it when threshold crossed - self-timed oscillation. Use Value: Draws <5µA average current; frequency stability depends only on REF accuracy and capacitor tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX983CSA+T | Same pinout and package, but ±2% reference accuracy and identical hysteresis architecture. | Suitable where ±2% threshold tolerance is acceptable (e.g., non-critical battery monitoring). | Select MAX983CSA+T when reference accuracy requirement relaxes to ±2%, enabling cost-sensitive designs. |
| TLV3702IDR | Lower supply current (1.8µA), no internal reference, rail-to-rail inputs, but requires external reference and hysteresis network. | Better for ultra-low-power systems where board space permits external components and tighter offset specs are needed. | Choose TLV3702IDR when <2µA supply current is mandatory and design can accommodate external reference/hysteresis. |
Compared with MAX973CSA+T, MAX983CSA+T trades reference accuracy for broader tolerance acceptance, while TLV3702IDR reduces current draw at the cost of added external components and design complexity - making MAX973CSA+T optimal for integrated, ±1% threshold integrity in compact battery systems.
Availability
MAX973CSA+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and window comparators requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX973CSA+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) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX97x/MAX98x comparator family was designed for ultra-low-power, precision threshold detection in portable and energy-constrained systems - emphasizing micropower operation, integrated references, and simplified hysteresis implementation.
FAQ
What is the reference voltage accuracy of the MAX973CSA+T over temperature?
The MAX973CSA+T features a 1.182V internal bandgap reference with ±1% accuracy over the commercial temperature range (0°C to +70°C). This specification is guaranteed and tested per Maxim's datasheet Electrical Characteristics table for the C-temp grade. The reference is referenced to V−, not GND, and maintains stability across its full supply range. MAX973CSA+T does not specify tighter tolerance at 25°C beyond the ±1% limit.
Can the MAX973CSA+T operate from a 3V single supply?
Yes, the MAX973CSA+T is fully specified for 3V single-supply operation (V+ = 3V, V− = GND). At 3V, typical supply current remains ≤4µA, input common-mode range spans 0V to 1.7V, and propagation delay is 12µs at 10mV overdrive. All electrical characteristics in the "3V OPERATION" section of the datasheet confirm functional behavior under this condition. MAX973CSA+T meets all performance specs at 3V without derating.
How is hysteresis programmed on the MAX973CSA+T?
Hysteresis on the MAX973CSA+T is programmed using the HYST pin with two external resistors: 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. This method avoids external feedback and preserves low power. MAX973CSA+T supports identical hysteresis on both comparators simultaneously.
What is the maximum output sink current for the MAX973CSA+T?
The MAX973CSA+T open-drain outputs (OUTA and OUTB) are specified to sink ≥1.8mA at VOL ≤ V− + 0.4V with V+ = 5V, and ≥0.8mA at VOL ≤ V− + 0.4V with V+ = 3V. Absolute maximum continuous sink current is 50mA, but practical drive capability depends on V+ and load conditions. Output leakage is ≤100nA at VOUT = 11V. MAX973CSA+T outputs sink to V−, not GND, enabling dual-supply compatibility.
Does the MAX973CSA+T have a separate GND pin for the output stage?
No, the MAX973CSA+T does not have a separate GND pin for the output stage. Unlike the MAX971/MAX974/MAX981/MAX984, which include dedicated GND pins for output transistor return, the MAX973CSA+T outputs sink current to V−. Pin 2 is labeled V− and serves as the negative supply and output sink reference. This configuration supports dual-supply operation but requires V− to be tied to system ground only in single-supply setups. MAX973CSA+T shares this architecture with MAX982/MAX983.
MAX973CSA+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:
- Active
- Type:
- with Voltage Reference
- Number of Elements:
- 2
- Output Type:
- Open-Drain
- 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
MAX973CSA+T FAQ
1.How can I place an order for MAX973CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX973CSA+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 MAX973CSA+T reliable?
The price and inventory of MAX973CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX973CSA+T is usually 5 days.
3.What payment methods are accepted for MAX973CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX973CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX973CSA+T?
MAX973CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX973CSA+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 MAX973CSA+T?
For technical support, including MAX973CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX973CSA+T requirements.
6.How does Aetrix verify that MAX973CSA+T is sourced from the original manufacturer or authorized distributors?
All MAX973CSA+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 MAX973CSA+T meets industry standards.
7.What is the process for return or replacement of MAX973CSA+T?
All MAX973CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX973CSA+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 MAX973CSA+T part is unused and in its original packaging.
Return procedure for MAX973CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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