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Analog Devices Inc./Maxim Integrated MAX931ESA-TG068
- Part No.:
- MAX931ESA-TG068
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
MAX931ESA-TG068.pdf
- Description:
- ULTRA LOW-POWER, LOW-COST COMPAR
- Quantity:
- Payment:
- Shipping:
Inventory:1,481
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Product details
Overview
MAX931ESA-TG068 from Maxim Integrated is a single micropower comparator with integrated 1.182V ±2% bandgap reference, programmable hysteresis via HYST pin, TTL/CMOS-compatible output sourcing up to 40mA, and 4µA max supply current over –40°C to +85°C. It operates from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual supply) and supports battery-powered threshold detection with rail-to-rail input range down to V–.
For engineers reviewing the MAX931ESA-TG068 datasheet, MAX931ESA-TG068 pinout, MAX931ESA-TG068 application, or MAX931ESA-TG068 equivalent, key selection criteria include ultra-low quiescent current, internal reference accuracy, hysteresis configurability without external feedback, and output drive capability in space-constrained portable systems.
Technical Context
The MAX931ESA-TG068 integrates a precision 1.182V reference referenced to V– (not GND), enabling stable threshold generation independent of supply variation. Its comparator input common-mode range extends from V– to (V+ – 1.3V), supporting operation near supply rails in single- and dual-supply configurations.
The unique output stage eliminates crowbar current during transitions, preventing supply glitches and parasitic feedback. Hysteresis is implemented via the HYST pin using two resistors-no external op-amp or feedback network required-delivering deterministic 100mV max hysteresis band with minimal added current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | <4µA max over –40°C to +85°C - enables multi-year battery life in always-on sensing nodes |
| Reference Voltage | 1.182V ±2% (0°C to +70°C), ±2.5% (–40°C to +85°C) - provides stable trip point without external reference IC |
| Input Voltage Range | V– to (V+ – 1.3V) - supports wide dynamic range sensing, e.g., 0–3.7V Li-ion battery monitoring |
| Propagation Delay | 12µs typical (10mV overdrive, 5V supply) - suitable for medium-speed window detection and alarm triggering |
| Output Drive | Sources 40mA continuously, sinks 5mA - directly drives LEDs, small relays, or logic inputs without buffer stages |
| Operating Supply | +2.5V to +11V single supply or ±1.25V to ±5.5V dual supply - compatible with 3V/5V systems and bipolar signal conditioning |
| Hysteresis Control | HYST pin accepts REF – 0.05V to REF - enables precise, resistor-programmed hysteresis without feedback loop instability |
Pinout & Package
MAX931ESA-TG068 is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), rated for –40°C to +85°C operation. The package is RoHS-compliant, surface-mount, and pin-compatible with SO and DIP variants of the MAX931 family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Comparator output | Sinks and sources current; swings from V+ to GND - TTL-compatible with +5V supply, no level-shifting needed |
| 2: V– | Negative supply | Connect to GND for single-supply operation; defines reference ground for REF and input common-mode range |
| 3: IN+ | Noninverting input | Accepts signals from V– to (V+ – 1.3V); high-impedance (±0.01nA leakage) minimizes loading on sensor dividers |
| 4: IN– | Inverting input | Same voltage range and leakage as IN+; used with IN+ to set threshold crossing direction |
| 5: HYST | Hysteresis control input | Accepts voltage from (REF – 50mV) to REF - sets hysteresis band width via external R1/R2 divider |
| 6: REF | Reference output | 1.182V ±2% w.r.t. V–; sources ≤15µA/sinks ≥8µA - powers HYST network and serves as precision threshold source |
| 7: V+ | Positive supply | Supports +2.5V to +11V; supplies comparator core and output stage - bypassing recommended only for high-impedance supplies |
| 8: GND | Ground | Connected internally to V– for single-supply use; decouples output return path from analog input ground |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | <4µA max over full temperature range - extends shelf life and runtime in coin-cell-powered IoT sensors |
| Integrated 2% reference | 1.182V ±2% bandgap referenced to V– - eliminates external reference IC, reduces BOM count and layout area |
| Programmable hysteresis | Configurable via HYST pin and two resistors - avoids unstable positive-feedback loops and simplifies PCB routing |
| No crowbar current | Crowbar-free output transition - prevents supply rail disturbance, enabling stable operation without large bypass caps |
| TTL/CMOS-compatible output | 40mA source / 5mA sink into V+–GND swing - directly interfaces with microcontroller GPIOs and LED indicators |
Applications
| Battery-Powered Threshold Detector | Auto-Off Power Switch |
|---|---|
|
Use Scenario: Monitoring Li-ion battery voltage to trigger low-battery warning at 3.2V cutoff. IC Role / Device Role / Timing Role: Comparator compares divided battery voltage against internal 1.182V reference; HYST pin adds 50mV hysteresis to prevent chatter near threshold. Use Value: Draws only 3.5µA quiescent current while maintaining accurate, glitch-free trip point across temperature and aging. |
Use Scenario: Enabling timed shutdown of peripheral circuitry after user inactivity (e.g., handheld medical device). IC Role / Device Role / Timing Role: MAX931ESA-TG068 controls MOSFET gate via RC-timed hysteresis; OUT drives load directly with 40mA source capability. Use Value: Eliminates need for separate timer IC and reference, reducing component count and power overhead in compact designs. |
| Window Comparator (Undervoltage/Oversupply) | LED Bar-Graph Level Indicator |
|
Use Scenario: Validating 5V system supply stays within 4.5V–5.5V window for reliable digital operation. IC Role / Device Role / Timing Role: Paired with MAX933/MAX934; uses REF and HYST to generate precise upper/lower thresholds with ±5mV hysteresis. Use Value: Internal reference ensures consistent window width across supply and temperature - no calibration required. |
Use Scenario: Visualizing analog sensor output (e.g., pressure transducer) using four discrete LED segments. IC Role / Device Role / Timing Role: Four MAX931ESA-TG068 units compare scaled input against cascaded reference dividers; outputs drive LEDs directly. Use Value: 40mA output drive eliminates current-limiting resistors and transistor buffers - simplifies layout and improves efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator-with-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX921ESA+ | 1% reference accuracy (vs. 2%), same pinout and quiescent current; higher cost and slightly higher supply current at extremes | Required where ±10mV absolute threshold tolerance is mandatory (e.g., precision instrumentation) | Select MAX921ESA+ when reference accuracy dominates over cost and ultra-low-power priority |
| TLV3011DBVR | Single comparator with 1.25V reference, 1.2µA quiescent current, but no HYST pin - hysteresis requires external feedback | Suitable for lowest-power wake-up circuits where hysteresis is not needed or can be added externally | Choose TLV3011DBVR only if <2µA supply current is critical and hysteresis can be implemented with external components |
Compared with MAX921ESA+, MAX931ESA-TG068 trades 1% reference accuracy for lower cost and identical pin compatibility, while TLV3011DBVR achieves lower quiescent current but lacks integrated hysteresis control and requires additional passives for stable thresholding.
Availability
MAX931ESA-TG068 is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, oscillator circuits, and alarm circuits requiring stable component supply with guaranteed –40°C to +85°C operation and long-term obsolescence management.
Supply support for MAX931ESA-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, sensing, and interface applications, with emphasis on low-power, high-reliability solutions for industrial and portable systems.
The MAX931ESA-TG068 belongs to the MAX931–MAX934 micropower comparator family, engineered specifically for ultra-low-power threshold detection in battery-critical applications where integrated reference and hysteresis reduce design complexity.
FAQ
What is the operating temperature range for MAX931ESA-TG068?
The MAX931ESA-TG068 is specified for –40°C to +85°C operation, matching the "E" grade suffix in its ordering code. This extended temperature range ensures reliable performance in automotive cabin modules, outdoor sensors, and industrial controllers where ambient conditions exceed commercial limits. The internal 1.182V reference maintains ±2.5% accuracy across this full range.
Can MAX931ESA-TG068 operate from a 3V supply?
Yes, MAX931ESA-TG068 operates from +2.5V to +11V single supply, including 3V nominal systems. At 3V, supply current remains below 4µA, propagation delay increases to ~14µs (10mV overdrive), and output high voltage drops to V+ – 0.4V. Input common-mode range extends from GND to 1.7V, supporting direct interfacing with 3V ADCs and sensors.
How is hysteresis configured on MAX931ESA-TG068?
Hysteresis on MAX931ESA-TG068 is configured using the HYST pin: connect 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 - eliminating external feedback and associated stability risks.
Is MAX931ESA-TG068 pin-compatible with MAX921ESA?
Yes, MAX931ESA-TG068 is pin-compatible with MAX921ESA per Maxim's datasheet: both share identical 8-pin µMAX footprint, pin functions, and electrical interface. The primary difference is reference accuracy (2% vs. 1%) and minor supply current variation. No PCB redesign is required when upgrading from MAX931ESA-TG068 to MAX921ESA for tighter threshold tolerance.
What is the maximum continuous output source current of MAX931ESA-TG068?
MAX931ESA-TG068 delivers up to 40mA continuous output source current into loads tied between OUT and GND, verified across –40°C to +85°C and supply voltages from 2.5V to 11V. This allows direct driving of LEDs, small solenoids, or logic inputs without external buffers - provided power dissipation in the 3mm × 3mm µMAX package remains within 330mW (derated above +70°C).
MAX931ESA-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:
- -
- :
- -
MAX931ESA-TG068 FAQ
1.How can I place an order for MAX931ESA-TG068 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX931ESA-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 MAX931ESA-TG068 reliable?
The price and inventory of MAX931ESA-TG068 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX931ESA-TG068 is usually 5 days.
3.What payment methods are accepted for MAX931ESA-TG068?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX931ESA-TG068 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX931ESA-TG068?
MAX931ESA-TG068 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX931ESA-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 MAX931ESA-TG068?
For technical support, including MAX931ESA-TG068 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX931ESA-TG068 requirements.
6.How does Aetrix verify that MAX931ESA-TG068 is sourced from the original manufacturer or authorized distributors?
All MAX931ESA-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 MAX931ESA-TG068 meets industry standards.
7.What is the process for return or replacement of MAX931ESA-TG068?
All MAX931ESA-TG068 units undergo pre-shipment inspection (PSI). If there is an issue with MAX931ESA-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 MAX931ESA-TG068 part is unused and in its original packaging.
Return procedure for MAX931ESA-TG068:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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