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Analog Devices Inc./Maxim Integrated MAX931ESA+TG002
- Part No.:
- MAX931ESA+TG002
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
MAX931ESA+TG002.pdf
- Description:
- INTEGRATED CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:3,215
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Product details
Overview
MAX931ESA+TG002 from Maxim Integrated is a single micropower comparator with integrated 1.182V ±2% bandgap reference, programmable hysteresis via HYST pin, TTL/CMOS-compatible output that sources up to 40mA and sinks ≥5mA, and operates from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual supply). It targets battery-powered threshold detection where ultra-low quiescent current (<4µA over temperature) and rail-to-rail input range (V− to V+ − 1.3V) are critical.
For engineers reviewing the MAX931ESA+TG002 datasheet, MAX931ESA+TG002 pinout, MAX931ESA+TG002 application, or MAX931ESA+TG002 equivalent, key selection considerations include its 12µs propagation delay (10mV overdrive), internal reference accuracy, hysteresis configuration method, and µMAX-8 package compatibility with space-constrained portable systems.
Technical Context
The MAX931ESA+TG002 implements a micropower comparator core with an on-die 1.182V bandgap reference referenced to V−, not GND. Its unique output stage eliminates crowbar current during transitions, minimizing supply-line parasitic feedback and enabling stable operation without strict PCB layout constraints.
Hysteresis is implemented via the HYST pin, accepting voltage between REF − 50mV and REF to set a hysteresis band up to 100mV. Input common-mode range extends from V− to V+ − 1.3V, supporting operation in single-supply systems where signals approach the positive rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply; enables direct use with 3V/5V logic rails and battery inputs down to 2.5V |
| Quiescent Current | <4µA over −40°C to +85°C; ensures multi-year battery life in always-on sensing nodes |
| Reference Voltage | 1.182V ±2% at V−; provides stable, self-contained threshold source without external components |
| Propagation Delay | 12µs at 10mV overdrive; supports medium-speed window detection and oscillator timing |
| Output Drive | Sources ≥40mA continuously; drives LEDs, small relays, or logic inputs directly without buffer stages |
| Input Common-Mode Range | V− to V+ − 1.3V; allows detection of signals near V+ in single-supply configurations |
| Package | 8-pin µMAX (3mm × 3mm); fits high-density portable PCBs with thermal performance derated at 4.1mW/°C above +70°C |
Pinout & Package
MAX931ESA+TG002 is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), rated for −40°C to +85°C operation. The package features exposed pad for thermal enhancement and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Comparator output | Sinks and sources current; swings from V+ to GND-TTL-compatible when V+ = 5V ±10% |
| 2 - V− | Negative supply | Connect to GND for single-supply operation; output swing referenced to this node |
| 3 - IN+ | Noninverting input | Accepts signals from V− to V+ − 1.3V; high-impedance (±0.01nA leakage) |
| 4 - IN− | Inverting input | Same common-mode and leakage specs as IN+; forms differential comparison pair |
| 5 - HYST | Hysteresis control input | Voltage between REF − 50mV and REF sets hysteresis band; no external feedback required |
| 6 - REF | Reference output | 1.182V ±2% w.r.t. V−; sources ≤15µA, sinks ≥8µA; must not be bypassed |
| 7 - V+ | Positive supply | Accepts +2.5V to +11V; supplies both comparator and reference circuits |
| 8 - GND | Ground | Connect to V− for single-supply use; serves as reference for output swing and PCB return path |
Key Features
| Feature | Design Value |
|---|---|
| No crowbar switching current | Eliminates supply-line glitches during output transitions, reducing need for aggressive power-supply decoupling |
| Programmable hysteresis via HYST pin | Enables noise-immune thresholding using only two resistors-no op-amp feedback loop or stability analysis needed |
| 40mA continuous output source | Drives LEDs, MOSFET gates, or logic loads directly-reduces BOM count and board area vs. buffered comparators |
| Internal 1.182V ±2% reference | Provides stable, temperature-compensated threshold without external precision voltage source or resistor divider |
| Rail-to-rail input range (V− to V+ − 1.3V) | Supports detection of signals near V+ in low-voltage battery systems (e.g., 3.3V Li-ion monitoring) |
Applications
| Threshold Detector | Window Comparator |
|---|---|
Use Scenario: Monitoring battery voltage to trigger low-battery warning at 3.2V cutoff in a handheld medical device. IC Role / Device Role / Timing Role: Single comparator compares divided battery voltage against internal 1.182V reference; HYST pin configures 50mV hysteresis to prevent chatter near trip point. Use Value: Eliminates external reference IC and hysteresis resistors-reducing component count by ≥3 and saving >4mm² PCB area. | Use Scenario: Validating 5V system supply within 4.75V–5.25V window in an industrial sensor node. IC Role / Device Role / Timing Role: Dual comparator (e.g., MAX932) uses shared REF and separate IN+/IN− pairs to detect undervoltage and overvoltage thresholds simultaneously. Use Value: Internal reference ensures matched threshold tracking across temperature; hysteresis prevents false toggling during supply ripple. |
| Oscillator Circuit | Alarm Circuit |
Use Scenario: Building a relaxation oscillator for LED blink timing in a low-power IoT endpoint. IC Role / Device Role / Timing Role: MAX931 charges/discharges external capacitor via REF and HYST pins; output toggles at frequency set by RC time constant and hysteresis band. Use Value: Self-timed operation requires no external clock or crystal-quiescent current remains <4µA during sleep cycles. | Use Scenario: Detecting smoke sensor output drift beyond safe limits in a battery-operated fire alarm. IC Role / Device Role / Timing Role: Comparator monitors analog sensor output against reference; open-drain or push-pull output drives buzzer or RF alert transmitter. Use Value: 40mA source capability drives buzzer directly; low supply current extends alarm runtime during mains failure. |
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 µMAX-8 package, identical quiescent current and supply range | Better for precision thresholding where ±11.8mV reference error is unacceptable (e.g., calibrated instrumentation) | Select MAX921ESA+ when reference accuracy dominates over cost; MAX931ESA+TG002 preferred for cost-sensitive, battery-life-critical designs |
| TLV3011IDBVR | Single comparator with 1.25V reference, 1.8V–5.5V supply, 1.2µA quiescent current, SOT-23-6 package-no HYST pin or 40mA drive | Lower power but lacks hysteresis control and high-current output; suited for sub-µA wake-up sensors, not load-driving | Choose TLV3011IDBVR only for ultra-low-power wake-up triggers; MAX931ESA+TG002 remains optimal when hysteresis configurability and output drive are required |
Compared with MAX921ESA+, MAX931ESA+TG002 trades 1% reference accuracy for lower unit cost and identical micropower operation; versus TLV3011IDBVR, it adds programmable hysteresis and 40mA sourcing-enabling direct load control without external drivers.
Availability
MAX931ESA+TG002 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 µMAX-8 footprint compatibility.
Supply support for MAX931ESA+TG002 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, mixed-signal, and power-management ICs for industrial, automotive, and communications applications.
The MAX931ESA+TG002 belongs to the MAX931–MAX934 micropower comparator family, engineered specifically for ultra-low-power, single-supply threshold detection with integrated reference and hysteresis-targeting portable and energy-harvesting systems.
FAQ
What is the operating temperature range for MAX931ESA+TG002?
The MAX931ESA+TG002 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-grade limits. All electrical characteristics-including 4µA max quiescent current and 1.182V ±2% reference-are guaranteed across this full range.
Can MAX931ESA+TG002 operate from a 3V supply?
Yes, MAX931ESA+TG002 operates from +2.5V to +11V single supply, making 3V fully supported. At 3V, supply current remains <4µA, input common-mode range extends from GND to 1.7V, and propagation delay increases slightly to ~14µs (10mV overdrive). The internal 1.182V reference remains functional and stable, enabling accurate thresholding even at minimum supply.
How is hysteresis configured on MAX931ESA+TG002?
Hysteresis on MAX931ESA+TG002 is configured using the HYST pin: connect R1 between REF and HYST, and R2 between HYST and GND. The hysteresis band (VHB) ≈ 2 × (VREF − VHYST), adjustable from 0mV to 100mV. For example, setting VHYST = REF − 25mV yields ~50mV hysteresis. No external op-amp or feedback network is needed-simplifying design and improving noise immunity.
Does MAX931ESA+TG002 require power-supply bypass capacitors?
Power-supply bypass capacitors are not mandatory for MAX931ESA+TG002 if the supply impedance is low, due to its crowbar-free output architecture. However, a 100nF ceramic capacitor placed close to V+ and GND is recommended when supply leads are long or impedance is high-especially in noisy environments. Do not bypass the REF pin, as this degrades reference stability and increases noise.
Is MAX931ESA+TG002 pin-compatible with any higher-accuracy alternatives?
Yes, MAX931ESA+TG002 is pin-compatible with MAX921ESA+ (1% reference accuracy), as confirmed in the datasheet: "The MAX931 and MAX921 are pin-compatible." Both share identical µMAX-8 pinout, supply range, and functional block diagram-allowing drop-in replacement where tighter reference tolerance is required without PCB redesign.
MAX931ESA+TG002 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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+TG002 FAQ
1.How can I place an order for MAX931ESA+TG002 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX931ESA+TG002 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+TG002 reliable?
The price and inventory of MAX931ESA+TG002 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX931ESA+TG002 is usually 5 days.
3.What payment methods are accepted for MAX931ESA+TG002?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX931ESA+TG002 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX931ESA+TG002?
MAX931ESA+TG002 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX931ESA+TG002 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+TG002?
For technical support, including MAX931ESA+TG002 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX931ESA+TG002 requirements.
6.How does Aetrix verify that MAX931ESA+TG002 is sourced from the original manufacturer or authorized distributors?
All MAX931ESA+TG002 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+TG002 meets industry standards.
7.What is the process for return or replacement of MAX931ESA+TG002?
All MAX931ESA+TG002 units undergo pre-shipment inspection (PSI). If there is an issue with MAX931ESA+TG002, 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+TG002 part is unused and in its original packaging.
Return procedure for MAX931ESA+TG002:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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