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Analog Devices Inc./Maxim Integrated MAX972ESA-T
- Part No.:
- MAX972ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX972ESA-T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,543
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Product details
Overview
MAX972ESA-T from Maxim Integrated is a single, ultra-low-power, open-drain comparator with no internal voltage reference and no programmable hysteresis. It operates from a single 2.5V to 11V supply (or ±1.25V to ±5.5V dual supplies), draws ≤4µA quiescent current over temperature, supports rail-to-rail input common-mode range down to V− and within 1.3V of V+, and features an open-drain output sinking to V−. It is used in battery-powered threshold detection where minimal supply current and wide supply flexibility are critical.
For engineers reviewing the MAX972ESA-T datasheet, MAX972ESA-T pinout, MAX972ESA-T application, or MAX972ESA-T equivalent, this page delivers verified technical context, exact pin functions for the 8-pin SO package, confirmed supply and propagation delay specs, and two validated alternative comparators suitable for low-power, open-drain, single-supply sensing applications.
Technical Context
The MAX972ESA-T implements a micropower comparator core without integrated reference or hysteresis circuitry-unlike MAX971/MAX981 variants-making it suitable for designs where external reference and hysteresis control are preferred. Its input stage accepts voltages from V− to (V+ − 1.3V), and its open-drain output sinks current to V− (not GND), requiring an external pullup.
This device belongs to the MAX97x/MAX98x family optimized for single- or dual-supply operation in space- and power-constrained systems. It achieves 12µs propagation delay at 10mV overdrive with 100pF load and 1MΩ pullup, and maintains stable performance across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single: 2.5V to 11V; Dual: ±1.25V to ±5.5V - enables direct use with Li-ion, 3.3V, 5V, and split-rail analog supplies. |
| Quiescent Supply Current | ≤4µA over −40°C to +85°C - ensures multi-year battery life in always-on sensor nodes. |
| Input Common-Mode Range | V− to (V+ − 1.3V) - supports detection near supply rails without level-shifting circuitry. |
| Propagation Delay | 12µs (10mV overdrive, 100pF load, 1MΩ pullup) - defines minimum response time for slow-varying thresholds like battery voltage monitoring. |
| Output Type | Open-drain, sinks to V− - requires external pullup; enables wire-OR logic and level translation up to 11V above V−. |
| Input Offset Voltage | ±10mV - sets minimum detectable differential voltage without trimming. |
| Voltage Noise (100Hz–100kHz) | 20µVRMS - limits resolution in low-overdrive, high-precision threshold applications. |
Pinout & Package
MAX972ESA-T is housed in an 8-pin SO (Small Outline) package per JEDEC MS-012, 150-mil width, with gull-wing leads and standard SOIC footprint compatibility.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Open-drain output; sinks current to V−; must be pulled up externally for logic-level output. |
| 2 | V− | Negative supply terminal; connect to GND in single-supply mode; defines reference for output sink and input common-mode range. |
| 3 | IN+ | Noninverting input; accepts signals from V− to (V+ − 1.3V); high-impedance (±0.01nA leakage). |
| 4 | IN− | Inverting input; same voltage range and leakage as IN+; forms differential sensing node. |
| 5 | HYST | Hysteresis control input; unused on MAX972; connect to REF only if external hysteresis is added (not internally supported). |
| 6 | REF | No internal reference; pin is not connected (NC) - unlike MAX971/MAX981, MAX972 lacks bandgap reference circuitry. |
| 7 | V+ | Positive supply terminal; total supply voltage (V+ − V−) must stay within 2.5V–11V. |
| 8 | GND | Ground connection; tied internally to V− for single-supply operation; provides substrate reference. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | ≤4µA max over full temperature range - eliminates need for shutdown control in energy-harvesting or coin-cell systems. |
| Wide single/dual supply support | Operates from 2.5V–11V single or ±1.25V–±5.5V dual - simplifies design across multiple power architectures without re-biasing. |
| Input rail-to-rail capability | Inputs function down to V− and up to (V+ − 1.3V) - enables direct sensing of battery voltage, supply rails, or transducer outputs without attenuation. |
| Open-drain output referenced to V− | Sinks to V−, not GND - allows level translation between domains where V− ≠ GND (e.g., isolated sensors, floating grounds). |
| No internal reference or hysteresis | REF and HYST pins are unconnected - gives full design freedom to select external reference accuracy, temperature drift, and hysteresis magnitude. |
Applications
| Battery Voltage Monitoring | Power-Good Detection |
|---|---|
Use Scenario: Continuously monitors Li-ion cell voltage during sleep mode to trigger wake-up or shutdown before deep discharge. IC Role / Device Role / Timing Role: Single comparator compares battery voltage against external precision reference via resistor divider; open-drain output drives microcontroller interrupt line. Use Value: 4µA supply current extends shelf life of sealed battery-powered devices beyond 10 years; rail-to-rail input avoids signal attenuation losses. | Use Scenario: Validates regulated 3.3V supply stability before enabling FPGA configuration or memory initialization. IC Role / Device Role / Timing Role: Compares 3.3V rail to 3.0V threshold using external reference; output pulled to 3.3V logic domain to assert "power-good" signal. Use Value: Open-drain output permits direct interfacing with multiple downstream logic families; 12µs delay ensures fast fault response without false triggering. |
| Window Comparator (with second MAX972) | Level Translation Interface |
Use Scenario: Detects when system voltage falls outside safe operating window (e.g., 4.5V–5.5V) in automotive accessory modules. IC Role / Device Role / Timing Role: Two MAX972ESA-T units implement undervoltage and overvoltage comparators; outputs wire-ORed to generate single fault flag. Use Value: No internal reference eliminates mismatch-induced window error; independent hysteresis tuning per threshold improves noise immunity. | Use Scenario: Interfaces ±5V analog sensor output to 3.3V microcontroller ADC input while maintaining isolation. IC Role / Device Role / Timing Role: Comparator senses zero-crossing or threshold on bipolar input; open-drain output pulled to 3.3V creates single-ended logic-compatible signal. Use Value: Output sinking to V− (not GND) allows direct connection to floating sensor ground; 11V output swing supports industrial I/O voltage levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX971ESA-T | Includes 1.182V ±1% internal reference and HYST pin for programmable hysteresis; otherwise identical pinout and supply specs. | Reduces BOM count in reference-dependent designs but adds ±1% reference drift vs. external precision references. | Select MAX971ESA-T when internal reference suffices and board space is constrained; choose MAX972ESA-T when reference accuracy, drift, or hysteresis control must be externally managed. |
| TLV3701IDBVR | Lower 1.3µA typical supply current, rail-to-rail inputs/outputs, push-pull output (no pullup needed), but no HYST/REF pins and only 5.5V max supply. | Better for ultra-low-power, single-supply-only, logic-level interface roles; unsuitable for >5.5V or dual-supply operation. | Choose TLV3701IDBVR for sub-3V coin-cell systems needing push-pull drive; retain MAX972ESA-T for 11V tolerance, dual-supply flexibility, or V−-referenced sinking. |
Compared with MAX971ESA-T, MAX972ESA-T removes internal reference and hysteresis circuitry-reducing die size, cost, and reference-related drift-while retaining identical supply range, pinout, and ultra-low current. Against TLV3701IDBVR, MAX972ESA-T trades higher supply current for wider voltage range, V−-sinking output, and SO package compatibility with legacy layouts.
Availability
MAX972ESA-T is available at Aetrix Electronics and suitable for battery-powered systems, power-good monitoring, window detection, and level translation applications requiring stable component supply across industrial temperature ranges.
Supply support for MAX972ESA-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, medical, and communications systems.
The MAX97x/MAX98x comparator family was engineered for ultra-low-power, wide-supply, open-drain sensing in portable and energy-constrained equipment-prioritizing supply current, input range, and output flexibility over integrated features.
FAQ
What is the maximum supply voltage for MAX972ESA-T?
The MAX972ESA-T supports a total supply voltage (V+ − V−) up to 11V in single-supply mode or ±5.5V in dual-supply mode. Absolute maximum ratings specify V+ to V− up to +12V, but functional operation is guaranteed only within 2.5V–11V. Exceeding 11V risks parametric degradation or reliability issues. The MAX972ESA-T datasheet confirms 11V as the upper limit for reliable comparator operation across temperature.
Does MAX972ESA-T include an internal voltage reference?
No, MAX972ESA-T does not include an internal voltage reference. Unlike MAX971/MAX981 variants, the REF pin is unconnected (NC), and the device requires an external reference for threshold comparison. This is explicitly stated in the Ordering Information table and Pin Description section of the MAX972ESA-T datasheet, which lists "None" under INTERNAL PRECISION REFERENCE for MAX972.
What is the purpose of the HYST pin on MAX972ESA-T?
The HYST pin on MAX972ESA-T is not internally connected and serves no functional role. The MAX972ESA-T lacks internal hysteresis circuitry; hysteresis must be implemented externally using positive feedback. The datasheet states "MAX972: None" for INTERNAL HYSTERESIS and clarifies that HYST is unused-unlike MAX971/MAX982, where HYST enables simple resistor-based hysteresis programming.
Can MAX972ESA-T operate from a 3.3V single supply?
Yes, MAX972ESA-T operates fully specified from a 3.3V single supply (V+ = 3.3V, V− = GND). Electrical Characteristics tables confirm supply current, offset voltage, and propagation delay are guaranteed at 3V operation. Input common-mode range extends from 0V to 2.0V (3.3V − 1.3V), and output sinks to GND with typical VOL = 0.4V at 1.8mA load-making it suitable for 3.3V logic interfacing with appropriate pullup.
What package type is used for MAX972ESA-T?
MAX972ESA-T uses an 8-pin SO (Small Outline) package per JEDEC MS-012, 150-mil body width, with gull-wing leads. The "ESA" suffix in the part number explicitly denotes the SO package, confirmed in the Ordering Information table. It is footprint-compatible with industry-standard SOIC-8 layouts and rated for operation from −40°C to +85°C.
MAX972ESA-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:
- Obsolete
- 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):
- 4µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX972ESA-T FAQ
1.How can I place an order for MAX972ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX972ESA-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 MAX972ESA-T reliable?
The price and inventory of MAX972ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX972ESA-T is usually 5 days.
3.What payment methods are accepted for MAX972ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX972ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX972ESA-T?
MAX972ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX972ESA-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 MAX972ESA-T?
For technical support, including MAX972ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX972ESA-T requirements.
6.How does Aetrix verify that MAX972ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX972ESA-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 MAX972ESA-T meets industry standards.
7.What is the process for return or replacement of MAX972ESA-T?
All MAX972ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX972ESA-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 MAX972ESA-T part is unused and in its original packaging.
Return procedure for MAX972ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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