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Analog Devices Inc./Maxim Integrated MAX972EBL+T
- Part No.:
- MAX972EBL+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-WFBGA, CSPBGA
- Datasheet:
-
MAX972EBL+T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,196
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Product details
Overview
The MAX972EBL+T from Maxim Integrated is a single, ultra-low-power, open-drain comparator with no internal voltage reference and no programmable hysteresis, housed in an 8-bump UCSP package. 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 up to V+ − 1.3V, and features open-drain output capable of sinking to GND. It is used in battery-powered threshold detection where minimal supply current and small footprint are critical.
For engineers reviewing the MAX972EBL+T datasheet, MAX972EBL+T pinout, MAX972EBL+T application, or MAX972EBL+T equivalent, this page delivers verified specifications, validated UCSP pin mapping, confirmed comparator timing (12µs propagation delay at 10mV overdrive), exact supply current behavior across temperature and voltage, and two rigorously cross-checked alternative parts for low-power open-drain comparator selection.
Technical Context
The MAX972EBL+T implements a single micropower comparator core with open-drain NMOS output stage referenced to GND - distinct from MAX971/MAX974 variants that feature separate output GND pins. Its input stage accepts signals from V− to (V+ − 1.3V), enabling direct interfacing with sensors or rails near supply limits without level shifting.
No internal voltage reference or HYST pin is integrated, differentiating it from MAX971/MAX982/MAX973 families. Hysteresis must be implemented externally via positive feedback, as confirmed by Figure 4 and Applications Information section for MAX972/MAX974. Propagation delay is specified at 12µs (high-to-low) under 10mV overdrive with 100pF load and 1MΩ pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single 2.5V to 11V or dual ±1.25V to ±5.5V - enables operation from coin cells (3V) to industrial rails (11V) without external regulators. |
| Quiescent Supply Current | ≤4µA max 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) - allows direct sensing of signals near V+ without attenuation or clamping diodes. |
| Propagation Delay | 12µs (high-to-low) at 10mV overdrive - defines minimum response time for slow-varying thresholds like battery voltage monitoring. |
| Output Configuration | Open-drain, sinks to GND - supports wire-OR logic, level translation (e.g., 5V logic driving 3.3V MCU input), and pullup flexibility. |
| Input Offset Voltage | ±10mV max - sets worst-case threshold error when comparing against precision references or resistive dividers. |
| Input Leakage Current | ±0.01nA to ±5nA - preserves accuracy in high-impedance divider networks (e.g., >1MΩ) without loading errors. |
Pinout & Package
Package: 8-bump UCSP (Ultra-Compact Silicon Package), 1.5mm × 1.5mm, bottom-mounted solder bumps, top mark "ABC".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A1) | OUTA | Open-drain comparator output; sinks current to GND - requires external pullup for logic-high assertion. |
| 2 (C2) | V− | Negative supply terminal; connect to GND in single-supply mode - defines lower bound of input common-mode range. |
| 3 (C1) | INA+ | Noninverting input - connects to reference voltage or sensor signal in threshold-detection configurations. |
| 4 (B1) | INA− | Inverting input - connects to sensed voltage (e.g., battery node) in standard comparator setup. |
| 5 (B3) | HYST | Hysteresis control input - unused on MAX972EBL+T; must be tied to V− or left floating per datasheet guidance for no-hysteresis operation. |
| 6 (C3) | REF | Reference output - not functional on MAX972EBL+T; must be left unconnected (no internal reference). |
| 7 (A2) | V+ | Positive supply terminal - powers comparator core and defines upper input limit (V+ − 1.3V). |
| 8 (A3) | GND | Ground reference for output stage and substrate - provides return path for output sink current and stabilizes bias. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small UCSP footprint | 1.5mm × 1.5mm area - reduces PCB space by >70% vs. SO-8, ideal for wearables and compact IoT sensors. |
| No internal reference | Eliminates 1.182V reference error and drift - allows use of higher-accuracy external references (e.g., REF5025) for <0.1% threshold stability. |
| Rail-to-rail input capability | Accepts inputs down to V− and up to V+ − 1.3V - enables direct connection to Li-ion battery (2.7–4.2V) without resistor dividers. |
| Open-drain output with GND sink | Sinks to system GND - simplifies interface to mixed-voltage MCUs (e.g., 3.3V I/O with 5V supply) without level-shifter ICs. |
| Guaranteed operation at −40°C to +85°C | Validated performance across industrial temperature range - suitable for automotive cabin modules and outdoor metering. |
Applications
| Battery Voltage Monitor | Power-Good Indicator |
|---|---|
Use Scenario: Monitoring lithium-polymer cell voltage during discharge to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Single comparator compares cell voltage (via resistive divider) against fixed reference; outputs active-low alert when below threshold. Use Value: 4µA supply current extends battery runtime by months in sleep-mode applications; UCSP size fits inside slim portable enclosures. | Use Scenario: Validating stable 3.3V rail after DC-DC startup in embedded controller systems. IC Role / Device Role / Timing Role: Comparator detects when regulated output exceeds 95% of nominal voltage, asserting power-good flag to enable downstream logic. Use Value: Open-drain output directly interfaces with 3.3V FPGA reset pin using 10kΩ pullup; no additional logic required. |
| Window Detector Input Stage | Level Translator (±5V → 3.3V) |
Use Scenario: Providing undervoltage/overvoltage detection for 5V USB-powered peripherals. IC Role / Device Role / Timing Role: Two MAX972EBL+T units (one for low-threshold, one for high-threshold) feed OR'd outputs to generate window violation signal. Use Value: Independent hysteresis design per channel avoids interaction between thresholds; 12µs delay ensures clean edge detection on noisy supply lines. | Use Scenario: Converting analog signals from ±5V op-amp stages to 3.3V ADC inputs in data acquisition systems. IC Role / Device Role / Timing Role: Comparator acts as rail-to-rail input receiver, translating bipolar swing into unipolar logic levels compatible with SAR ADC reference domain. Use Value: Input range extending to V+ − 1.3V allows direct ±5V input with 3.3V supply (V+ = 3.3V, V− = 0V); eliminates need for input attenuators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX971CSA | Includes 1.182V ±1% internal reference and HYST pin; SO-8 package; 4µA supply current. | Reduces BOM count by eliminating external reference; supports programmable hysteresis without feedback resistors. | Select when reference integration and simpler hysteresis design outweigh UCSP size constraints. |
| TLV3701IDBVR | Single comparator with rail-to-rail input, 1.8V–16V supply, 1.3µA supply current, SOT-23-5 package. | Lower supply current and wider voltage range; no internal reference; requires external hysteresis network. | Select for ultra-low-power (<2µA) or wide-input-voltage (>11V) requirements where UCSP is not mandatory. |
Compared with MAX972EBL+T, MAX971CSA adds reference and hysteresis convenience at the cost of larger SO-8 footprint and fixed ±1% reference tolerance, while TLV3701IDBVR offers lower quiescent current and broader supply range but lacks UCSP miniaturization and Maxim's proven industrial temperature validation.
Availability
MAX972EBL+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and level translators requiring stable component supply, extended temperature support (−40°C to +85°C), and ultra-small packaging.
Supply support for MAX972EBL+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 markets.
The MAX97x/MAX98x comparator family targets ultra-low-power, open-drain sensing in space-constrained, battery-operated equipment - emphasizing micropower operation, rail-to-rail inputs, and flexible supply configurations.
FAQ
What is the maximum supply voltage for MAX972EBL+T?
The MAX972EBL+T supports a maximum single-supply voltage of 11V or dual-supply rails of ±5.5V. Absolute maximum ratings specify V+ to V− up to +12V, but functional operation is guaranteed only within the 2.5V–11V single-supply range. Exceeding 11V risks parametric degradation or reliability impact, as confirmed in the Absolute Maximum Ratings table.
Does MAX972EBL+T include an internal voltage reference?
No, the MAX972EBL+T does not include an internal voltage reference. Unlike MAX971/MAX981 variants, its REF pin is nonfunctional and must remain unconnected. This is explicitly stated in the Ordering Information table (MAX972 has "None" under INTERNAL PRECISION REFERENCE) and confirmed in the Pin Description where REF is labeled "Reference Output. 1.182V with respect to V−" only for MAX971/MAX973/MAX974/MAX981–MAX984.
Can MAX972EBL+T operate from a 1.8V supply?
No, MAX972EBL+T is not guaranteed to operate below 2.5V. The datasheet states the guaranteed minimum operating voltage is 2.5V (or ±1.25V), and notes that "the MAX9_1/MAX9_2/MAX9_3 may not be used with supply voltages below 2.5V." While comparator functionality may persist down to ~1V in some conditions, performance (propagation delay, output drive) degrades significantly, and no specifications are provided below 2.5V.
What is the purpose of the HYST pin on MAX972EBL+T?
On MAX972EBL+T, the HYST pin is not functional for internal hysteresis - unlike MAX971/MAX982/MAX973. The datasheet confirms MAX972 has "No" under INTERNAL HYSTERESIS. HYST should be left unconnected or tied to V− per Application Information guidance for devices without hysteresis capability. External hysteresis must be added via positive feedback if required.
Is MAX972EBL+T pin-compatible with other MAX97x comparators in UCSP?
No, MAX972EBL+T is not pin-compatible with other MAX97x UCSP variants. The MAX972 UCSP pinout (A1=OUTA, C2=V−, C1=INA+, B1=INA−, B3=HYST, C3=REF, A2=V+, A3=GND) is unique to the single-comparator configuration. MAX973/MAX983 UCSP uses different bump assignments (e.g., A1=OUTA, B1=INA−, C1=INA+, etc.), and no other MAX97x part is offered in UCSP except MAX972. Pin compatibility is limited to same-function variants in DIP/SO/µMAX packages.
MAX972EBL+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-WFBGA, CSPBGA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- 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-UCSP (1.52x1.52)
MAX972EBL+T FAQ
1.How can I place an order for MAX972EBL+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX972EBL+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 MAX972EBL+T reliable?
The price and inventory of MAX972EBL+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX972EBL+T is usually 5 days.
3.What payment methods are accepted for MAX972EBL+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX972EBL+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX972EBL+T?
MAX972EBL+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX972EBL+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 MAX972EBL+T?
For technical support, including MAX972EBL+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX972EBL+T requirements.
6.How does Aetrix verify that MAX972EBL+T is sourced from the original manufacturer or authorized distributors?
All MAX972EBL+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 MAX972EBL+T meets industry standards.
7.What is the process for return or replacement of MAX972EBL+T?
All MAX972EBL+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX972EBL+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 MAX972EBL+T part is unused and in its original packaging.
Return procedure for MAX972EBL+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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