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Analog Devices Inc./Maxim Integrated MAX941EUA+
- Part No.:
- MAX941EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX941EUA+.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,628
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Product details
Overview
The MAX941EUA+ from Maxim Integrated is a single high-speed rail-to-rail input comparator optimized for 3V/5V single-supply systems, featuring 80ns propagation delay, 350μA supply current per comparator, and internal latch/shutdown functions. It operates from 2.7V to 5.5V, supports rail-to-rail inputs beyond both supply rails, and delivers CMOS/TTL-compatible outputs swinging within 0.4V of V+ or GND-ideal for battery-powered threshold detection and zero-crossing applications.
For engineers reviewing the MAX941EUA+ datasheet, MAX941EUA+ pinout, MAX941EUA+ application, or MAX941EUA+ equivalent, key selection considerations include its μMAX-8 package footprint, -40°C to +85°C industrial temperature range, latch-enable and shutdown control pins, and verified 1mV typical offset voltage with internal hysteresis for noise-immune switching.
Technical Context
The MAX941EUA+ implements a bipolar-input comparator core with rail-to-rail common-mode input range extending 0.3V beyond V+ and GND, enabling direct interface with sensors or signals exceeding supply rails. Its output stage is current-driven, delivering fast transitions with ISINK/ISOURCE up to 4mA while maintaining VOL ≤ 0.4V and VOH ≥ V+ − 0.4V without external pull-ups.
It integrates two dedicated digital control functions: SHDN (active-low shutdown reducing ICC to ≤60μA) and LATCH (transparent when high, latching output when low), both with logic thresholds at V+/2 ± 0.4V and leakage <10μA. Propagation delay skew between tPD+ and tPD− is guaranteed ≤10ns, supporting precise timing-critical discrimination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - enables operation from single Li-ion cell (3.0V nominal) or regulated 3.3V/5V rails without level-shifting. |
| Propagation Delay | 80ns (typ, 5mV overdrive) - ensures sub-100ns response for fast edge detection in sampling circuits and line receivers. |
| Input Offset Voltage | 1mV (typ, TA = +25°C) - supports accurate threshold setting in precision discriminators with minimal calibration overhead. |
| Supply Current | 350μA (typ, V+ = 3V) - allows integration into ultra-low-power portable systems with multi-day battery life. |
| Rail-to-Rail Input Range | -0.2V to V+ + 0.2V - permits direct connection to transducers or DACs operating outside supply rails without clamping diodes. |
| Output Compatibility | CMOS/TTL-compatible with VOH ≥ V+ − 0.4V and VOL ≤ 0.4V - eliminates need for external level translators when driving microcontroller GPIO or logic gates. |
| Internal Hysteresis | Fixed, non-adjustable - prevents oscillation on slow-moving or noisy inputs (e.g., thermistor-based temperature sensing), removing external resistor networks. |
Pinout & Package
The MAX941EUA+ is housed in an 8-pin μMAX® package (U8-1 outline, 3mm × 3mm, 0.65mm pitch), specified for industrial temperature range (-40°C to +85°C) and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No internal connection - must be left floating; no routing or grounding required. |
| 2 | OUT | Open-drain compatible comparator output - sinks up to 4mA, sources weakly; requires external pull-up only if high-side drive needed. |
| 3 | GND | Analog/digital ground reference - must connect to low-impedance PCB ground plane to minimize noise coupling into sensitive inputs. |
| 4 | LATCH | Active-low latch enable - drives output into transparent mode (high) or holds last state (low); high-impedance input with VIH/VIL = V+/2 ± 0.4V. |
| 5 | SHDN | Active-low shutdown control - reduces ICC to ≤60μA and places OUT in high-impedance state; same logic thresholds as LATCH. |
| 6 | IN− | Inverting input - accepts rail-to-rail voltages; differential input protection limits VIN+ − VIN− to ≤2.2V to prevent damage. |
| 7 | IN+ | Noninverting input - identical electrical characteristics to IN−; common-mode range extends beyond V+ and GND rails. |
| 8 | V+ | Positive supply - maximum rating 6.5V; requires local 0.1μF ceramic decoupling capacitor placed within 2mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Latch Enable Function | Hardware-controlled storage of comparator output state via dedicated LATCH pin - eliminates need for external D-latch or microcontroller polling in event-triggered systems. |
| Shutdown Mode | Reduces quiescent current to ≤60μA and disables output driver - enables power-gating in intermittent-sensing applications like wake-on-event sensor nodes. |
| Rail-to-Rail Input Stage | Accepts input voltages from -0.2V to V+ + 0.2V - supports direct interfacing with overvoltage-tolerant sensors (e.g., automotive battery monitors) without external attenuation. |
| Internal Hysteresis | Fixed ~3mV hysteresis width - ensures clean, bounce-free output transitions on slowly varying inputs (e.g., light-level detection), removing design burden of calculating external feedback resistors. |
| CMOS/TTL-Compatible Output | VOH ≥ V+ − 0.4V, VOL ≤ 0.4V - directly drives standard logic families without level shifters or pull-up resistors, simplifying BOM and layout in mixed-voltage systems. |
Applications
| Threshold Detector | Zero-Crossing Detector |
|---|---|
Use Scenario: Monitoring analog sensor output (e.g., thermistor voltage) against a fixed reference to trigger alarm or control action when crossing preset limit. IC Role / Device Role / Timing Role: Single-supply comparator comparing sensor signal to reference; latch function captures first breach event for microcontroller readout. Use Value: Eliminates external hysteresis resistors and logic glue, reduces component count by 3–5 parts, and enables sub-100ns response to rapid thermal transients. | Use Scenario: Detecting AC waveform polarity reversal in motor control or audio signal conditioning circuits powered from single 3.3V rail. IC Role / Device Role / Timing Role: High-speed comparator with rail-to-rail inputs tracking sine wave crossing through 0V; shutdown mode disables during idle periods to conserve power. Use Value: Supports true zero-crossing detection without input biasing networks, achieves <100ns timing jitter, and maintains accuracy across -40°C to +85°C ambient. |
| Battery-Powered Line Receiver | Sampling Circuit Trigger |
Use Scenario: Receiving differential or single-ended data pulses over long cables in portable test equipment, where supply headroom is limited to 3.3V. IC Role / Device Role / Timing Role: Comparator acting as high-speed line receiver with CMOS/TTL output; rail-to-rail inputs accommodate attenuated cable signals near GND or V+. Use Value: Enables robust signal recovery with <80ns latency and <1mV offset, eliminating need for dual-supply receivers or external amplification stages. | Use Scenario: Generating precise sample-enable pulses synchronized to analog signal edges in data acquisition systems using 3V microcontrollers. IC Role / Device Role / Timing Role: Fast comparator detecting input threshold crossing; latch pin freezes timing pulse for ADC start-of-conversion registration. Use Value: Provides deterministic 80ns-delay trigger with <10ns skew, avoids software interrupt latency, and supports sampling rates up to 10MHz without firmware overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV7215M5X/NOPB | Single 65ns comparator, 1.8V–5.5V supply, no latch/shutdown, 2.5mV max VOS, SOT-23-5 package | Lacks latch and shutdown; requires external hysteresis for noise immunity; smaller footprint but no control pins | Select when board space is critical and control features are unnecessary; verify hysteresis design for target noise floor. |
| TLV3501CDR | Single 4.5ns comparator, 2.7V–5.5V, no latch/shutdown, 6.5mV max VOS, SOIC-8 package | Higher speed but higher power (4.5mA ICC); no integrated latch/shutdown; larger SOIC-8 vs μMAX-8 footprint | Choose for nanosecond-level timing where latency dominates power or feature requirements; confirm layout supports faster edge rates. |
Compared with LMV7215M5X/NOPB and TLV3501CDR, the MAX941EUA+ uniquely combines sub-100ns speed, ultra-low 350μA quiescent current, rail-to-rail inputs, and dual control functions (latch + shutdown) in a miniature μMAX package-making it optimal for space-constrained, battery-operated systems requiring deterministic event capture and power gating.
Availability
MAX941EUA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors/discriminators, and zero-crossing detectors requiring stable component supply across industrial temperature ranges.
Supply support for MAX941EUA+ 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, medical, communications, and consumer applications.
The MAX941EUA+ belongs to Maxim's high-speed comparator product line, engineered specifically for low-voltage, low-power, single-supply systems requiring rail-to-rail input operation and deterministic timing in portable and embedded instrumentation.
FAQ
What is the operating temperature range for the MAX941EUA+?
The MAX941EUA+ is rated for industrial operation from -40°C to +85°C. This range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the datasheet, and applies specifically to the "E" grade variant in the μMAX package. The device maintains full electrical performance-including 80ns propagation delay and 1mV typical offset voltage-across this entire span.
Does the MAX941EUA+ require external pull-up resistors on its output?
No, the MAX941EUA+ does not require external pull-up resistors. Its output stage actively pulls high to within 0.4V of V+ and low to within 0.4V of GND under 400μA load, making it fully compatible with CMOS and TTL logic families without external components. This rail-to-rail output swing is specified in the Electrical Characteristics table for VOH and VOL parameters.
How does the LATCH function operate in the MAX941EUA+?
In the MAX941EUA+, the LATCH pin controls output transparency: when driven high, the comparator output updates in real time; when pulled low, the output state is frozen and held. This behavior is defined in the Pin Description and Detailed Description sections, with timing parameters including 20ns setup (tS) and 30ns hold (tH) times. The latch remains active even during shutdown if SHDN is asserted after latching.
What is the shutdown current consumption of the MAX941EUA+?
The MAX941EUA+ draws ≤60μA in shutdown mode (SHDN = low), as specified in the Electrical Characteristics table under "Supply Current per Comparator" with condition "MAX941 only, shutdown mode (V+ = 3V)". This value is guaranteed over the full -40°C to +85°C temperature range and enables significant power savings in duty-cycled sensing applications.
Can the MAX941EUA+ accept input voltages beyond its supply rails?
Yes, the MAX941EUA+ supports input common-mode voltages from -0.2V to V+ + 0.2V, explicitly exceeding both supply rails. This rail-to-rail input capability is documented in the Electrical Characteristics table and reinforced by Absolute Maximum Ratings allowing -0.3V to (V+ + 0.3V). The internal input protection diodes and 4.1kΩ series resistors enable safe operation with overvoltage transients without damage.
MAX941EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- with Latch, Shutdown
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 3mV @ 5.5V
- Voltage - Input Offset (Max):
- 0.15µA @ 5.5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 700µA
- Current - Quiescent (Max):
- 81.94dB CMRR, 81.94dB PSRR
- CMRR, PSRR (Typ):
- 80ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-uMAX/uSOP
MAX941EUA+ FAQ
1.How can I place an order for MAX941EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX941EUA+ 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 MAX941EUA+ reliable?
The price and inventory of MAX941EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX941EUA+ is usually 5 days.
3.What payment methods are accepted for MAX941EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX941EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX941EUA+?
MAX941EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX941EUA+ 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 MAX941EUA+?
For technical support, including MAX941EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX941EUA+ requirements.
6.How does Aetrix verify that MAX941EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX941EUA+ 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 MAX941EUA+ meets industry standards.
7.What is the process for return or replacement of MAX941EUA+?
All MAX941EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX941EUA+, 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 MAX941EUA+ part is unused and in its original packaging.
Return procedure for MAX941EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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