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Analog Devices Inc./Maxim Integrated MAX973CSA-TG068
- Part No.:
- MAX973CSA-TG068
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
MAX973CSA-TG068.pdf
- Description:
- MAX973 LOW-POWER COMPARATOR
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
MAX973CSA-TG068 from Maxim Integrated is a dual-channel, 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). Used in battery-powered threshold detectors and window comparators.
For engineers reviewing the MAX973CSA-TG068 datasheet, MAX973CSA-TG068 pinout, MAX973CSA-TG068 application, or MAX973CSA-TG068 equivalent, key selection criteria include guaranteed ±1% reference accuracy, dual-comparator hysteresis control without external feedback, 12µs propagation delay at 10mV overdrive, and separate GND-referenced output stage enabling bipolar-to-single-ended level translation.
Technical Context
The MAX973CSA-TG068 integrates two independent micropower comparators sharing one internal bandgap reference (1.182V ±1% over 0°C to +70°C) and a dedicated HYST pin for simultaneous hysteresis programming on both channels. Its open-drain outputs sink current to V−, not GND - confirmed by pinout and electrical specs - making it suitable for single-supply systems where V− = GND or dual-supply configurations with negative rails.
Input common-mode range extends from V− to (V+ − 1.3V), supporting operation near supply rails. Propagation delay is specified at 12µs (high-to-low) with 10mV overdrive and 100pF load, while low-to-high response depends on external pull-up RC time constant. Reference output drives up to 25µA source / 15µA sink with <100µVRMS noise (100Hz–100kHz).
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 max over temperature - ensures multi-year operation on coin-cell batteries. |
| Reference Voltage Accuracy | 1.182V ±1% (0°C to +70°C) - provides stable, factory-trimmed threshold for precision undervoltage/overvoltage detection. |
| Propagation Delay | 12µs typical (10mV overdrive, 100pF load) - supports medium-speed monitoring in power sequencing and supervisory circuits. |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows direct sensing of signals referenced to negative rails or ground in mixed-supply systems. |
| Output Configuration | Open-drain, sinks to V− - permits wire-ORing, level-shifting, and interface with higher-voltage logic without level translators. |
| Hysteresis Control | Programmable via HYST pin using two resistors - eliminates need for external positive-feedback networks and reduces board area. |
Pinout & Package
MAX973CSA-TG068 is housed in an 8-pin SO (Small Outline) package with standard 150-mil width and gull-wing leads. Pin 1 is marked with a beveled corner or dot; pin numbering follows counter-clockwise convention from top-left when viewed from component side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Comparator A open-drain output | Sinks current to V−; requires external pull-up for logic-level output; supports wired-OR with other open-drain devices. |
| 2 (V−) | Negative supply | Connect to GND for single-supply operation; defines reference point for REF and output sink path. |
| 3 (INA+) | Noninverting input of Comparator A | Accepts input signals from V− to (V+ − 1.3V); high-impedance (±0.01nA leakage) minimizes 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 − 0.05V to REF; sets hysteresis band width for both comparators simultaneously. |
| 6 (REF) | Internal 1.182V reference output | Referenced to V−, not GND; ±1% accuracy over commercial temp range; capable of sourcing 25µA/sinking 15µA. |
| 7 (V+) | Positive supply | Accepts 2.5V–11V single supply or positive rail of dual supply; powers internal reference and comparator core. |
| 8 (OUTB) | Comparator B open-drain output | Functionally identical to OUTA; enables independent dual-threshold detection (e.g., window comparator). |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparators with shared ±1% reference | Reduces component count and layout area in dual-threshold applications like power-good monitoring. |
| HYST pin for resistor-programmable hysteresis | Eliminates need for external op-amp feedback loops; enables precise, matched hysteresis on both channels with two resistors. |
| Open-drain outputs sinking to V− | Supports level translation between disparate supply domains (e.g., ±5V input → 3.3V logic) without additional transistors. |
| Rail-to-rail input range (V− to V+ − 1.3V) | Enables direct interface with sensors, battery voltages, and DAC outputs without input attenuation or biasing networks. |
| Ultra-low 4µA max supply current | Extends battery life in portable medical, IoT, and remote sensor nodes where duty-cycled wake-up is critical. |
Applications
| Power-Good Monitoring | Window Voltage Detection |
|---|---|
Use Scenario: Verifying that a microcontroller's 3.3V supply remains within 3.15V–3.45V during startup and runtime. IC Role / Device Role / Timing Role: Dual comparator monitors upper and lower thresholds using REF and resistor dividers; outputs wired-OR to generate active-high POWER_GOOD signal. Use Value: Eliminates need for discrete reference IC and two standalone comparators, reducing BOM cost and PCB footprint by >40%. | Use Scenario: Detecting battery voltage drift in a 4-cell Li-ion pack (14.4V nominal) to trigger charge enable/disable at 16.8V (OV) and 12.0V (UV). IC Role / Device Role / Timing Role: MAX973CSA-TG068 implements undervoltage (OUTA) and overvoltage (OUTB) comparators with shared REF and HYST-controlled hysteresis. Use Value: Internal ±1% reference ensures ±0.17V absolute threshold accuracy across temperature, improving battery protection reliability vs. external references. |
| Battery Switchover Control | Level Translation Interface |
Use Scenario: Seamless transition from wall adapter (5V) to backup Li-Po (3.7V) in portable instrumentation when main supply drops below 4.2V. IC Role / Device Role / Timing Role: One comparator triggers P-MOSFET gate via OUTA; second monitors battery health via OUTB-driven LED or MCU GPIO. Use Value: 4µA quiescent current prevents parasitic drain on backup battery during standby, extending shelf life beyond 12 months. | Use Scenario: Converting ±5V analog sensor outputs to 3.3V logic-compatible signals for ADC input in industrial data loggers. IC Role / Device Role / Timing Role: Uses V− = −5V, V+ = 0V configuration; REF referenced to V− enables accurate zero-crossing detection; open-drain outputs pulled to 3.3V. Use Value: Output sink-to-V− architecture avoids level-shifter ICs or resistor-divider networks, preserving signal integrity and reducing noise coupling. |
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 |
|---|---|---|---|
| MAX983CSA | Same pinout and function but ±2% reference accuracy; otherwise identical supply current, propagation delay, and hysteresis architecture. | Lower reference precision limits use in tight-threshold applications (e.g., <±20mV UV/OV windows). | Select MAX983CSA only when ±2% reference tolerance satisfies system requirements and cost reduction is prioritized. |
| TLV3702IDR | Single-supply only (2.7V–16V), no internal reference, no HYST pin; 85µA supply current; rail-to-rail inputs; push-pull outputs. | Requires external reference and hysteresis circuitry; unsuitable for ultra-low-power or dual-threshold integrated solutions. | Choose TLV3702IDR only when higher speed (<1µs delay) or push-pull output is required and system power budget allows >20× higher current draw. |
Compared with MAX973CSA-TG068, MAX983CSA trades reference accuracy for cost, while TLV3702IDR sacrifices integration and power efficiency for speed and output drive flexibility - neither offers drop-in replacement capability due to architectural differences in reference, hysteresis, and output stage.
Availability
MAX973CSA-TG068 is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and level translators requiring stable component supply with guaranteed commercial-temperature performance and long-term manufacturability.
Supply support for MAX973CSA-TG068 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 management, sensing, and interface applications in industrial, automotive, and consumer markets.
The MAX97x/MAX98x comparator family was engineered specifically for ultra-low-power, space-constrained systems needing integrated reference and hysteresis - targeting portable medical devices, wearables, and energy-harvesting sensor nodes.
FAQ
What is the reference voltage tolerance of MAX973CSA-TG068 over temperature?
The MAX973CSA-TG068 features an internal 1.182V bandgap reference with ±1% accuracy over the commercial temperature range (0°C to +70°C). This tolerance is guaranteed by design and testing per Maxim's datasheet specifications, and applies to all MAX97x variants (MAX971/MAX973/MAX974), unlike the ±2% tolerance of MAX98x parts.
Can MAX973CSA-TG068 operate from a single 3V supply?
Yes, MAX973CSA-TG068 operates from a single 2.5V to 11V supply. At 3V, its supply current is typically 2.4µA (max 3.0µA), input common-mode range spans 0V to 1.7V, and propagation delay increases slightly to ~14µs (10mV overdrive). The internal reference remains fully functional and stable at this voltage.
How is hysteresis implemented on MAX973CSA-TG068?
Hysteresis on MAX973CSA-TG068 is implemented using the HYST pin: connect R1 between REF and HYST, and R2 between HYST and V−. The hysteresis band (VHB) ≈ 2 × (VREF − VHYST), adjustable from 0mV to 100mV. This method applies identical hysteresis to both comparators without external feedback components.
Does MAX973CSA-TG068 support dual-supply operation?
Yes, MAX973CSA-TG068 supports dual-supply operation from ±1.25V to ±5.5V. In this mode, V+ connects to the positive rail, V− to the negative rail, and GND is unused. Outputs sink to V−, and the internal reference is referenced to V−, enabling true bipolar signal conditioning and level translation.
What is the maximum output sink current for MAX973CSA-TG068?
MAX973CSA-TG068 outputs (OUTA and OUTB) are open-drain N-channel MOSFETs sinking to V−. They support continuous short-circuit sink current up to 50mA (typical) at V+ = 5V, with VOL ≤ V− + 0.4V at IOUT = 1.8mA. Absolute maximum output voltage is 11V above V−, even with no supply present.
MAX973CSA-TG068 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- :
- -
MAX973CSA-TG068 FAQ
1.How can I place an order for MAX973CSA-TG068 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX973CSA-TG068 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-TG068 reliable?
The price and inventory of MAX973CSA-TG068 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX973CSA-TG068 is usually 5 days.
3.What payment methods are accepted for MAX973CSA-TG068?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX973CSA-TG068 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX973CSA-TG068?
MAX973CSA-TG068 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX973CSA-TG068 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-TG068?
For technical support, including MAX973CSA-TG068 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX973CSA-TG068 requirements.
6.How does Aetrix verify that MAX973CSA-TG068 is sourced from the original manufacturer or authorized distributors?
All MAX973CSA-TG068 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-TG068 meets industry standards.
7.What is the process for return or replacement of MAX973CSA-TG068?
All MAX973CSA-TG068 units undergo pre-shipment inspection (PSI). If there is an issue with MAX973CSA-TG068, 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-TG068 part is unused and in its original packaging.
Return procedure for MAX973CSA-TG068:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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