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Analog Devices Inc./Maxim Integrated MAX987EUK+T
- Part No.:
- MAX987EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX987EUK+T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,306
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Product details
Overview
MAX987EUK+T from Maxim Integrated is a single-channel, micropower, rail-to-rail input/output comparator with push-pull output stage, operating from +2.5V to +5.5V supply, delivering 120ns propagation delay, 48μA quiescent current per comparator, and ±0.5mV typical input offset voltage. It is used in battery-powered zero-crossing detectors and precision threshold sensing where low power and fast response are critical.
For engineers reviewing the MAX987EUK+T datasheet, MAX987EUK+T pinout, MAX987EUK+T application, or MAX987EUK+T equivalent, key selection criteria include its SC70-5 package footprint, push-pull 8mA drive capability, rail-to-rail common-mode range extending 250mV beyond rails, and guaranteed operation from –40°C to +85°C.
Technical Context
The MAX987EUK+T implements a high-speed, low-noise input stage with 1.0pA typical input bias current and internal ±2.5mV hysteresis to prevent chatter on slow-moving signals. Its input common-mode range spans VEE – 0.25V to VCC + 0.25V, enabling direct interface with sensors or attenuated signals exceeding supply rails.
The push-pull output stage delivers rail-to-rail swing into loads up to 8mA, with VOL ≤ 0.4V at 8mA sink (VCC = 5V) and VOH ≥ 4.6V at 8mA source (VCC = 5V). Supply-current surges during switching are minimized, reducing need for large decoupling capacitors in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V single supply - supports both 3V and 5V systems without level-shifting. |
| Propagation Delay | 120ns at 100mV overdrive (VCC = 5V, CL = 15pF) - enables use in sub-MHz timing-critical detection circuits. |
| Quiescent Current | 48μA per comparator at VCC = 2.7V - extends battery life in portable instrumentation and wearables. |
| Input Offset Voltage | ±0.5mV typical (±5mV max) - ensures accurate threshold detection down to millivolt-level signal differentials. |
| Common-Mode Range | VEE – 0.25V to VCC + 0.25V - allows direct connection to transducers or AC-coupled sources without clamping diodes. |
| Output Drive | Sinks and sources 8mA with rail-to-rail swing - eliminates external buffer stages in driving LEDs, logic inputs, or small relays. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive cabin ambient environments. |
Pinout & Package
MAX987EUK+T is housed in a 5-pin SC70-5 package (package code X5-1), measuring 2.0mm × 1.25mm × 0.95mm, optimized for ultra-compact PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Comparator output | Push-pull CMOS-compatible output capable of sourcing/sinking 8mA; no external pull-up required. |
| 2 - VCC | Positive supply voltage | Accepts +2.5V to +5.5V; requires local 0.1μF ceramic decoupling placed adjacent to this pin. |
| 3 - IN+ | Noninverting input | Differential input with 1.0pA bias current; supports common-mode voltages up to VCC + 0.25V. |
| 4 - IN− | Inverting input | Matches IN+ in bias, offset, and common-mode range; enables precise differential or single-ended sensing. |
| 5 - VEE | Negative supply voltage | Typically grounded (0V) in single-supply operation; defines lower rail for input/output swing and bias reference. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O with extended common-mode range | Inputs operate 250mV beyond VCC/VEE rails; outputs swing within 200mV of rails under 8mA load - simplifies sensor interfacing without external level shifters. |
| Low-switching-current output architecture | Minimal supply-current surge during transitions - reduces supply noise and eliminates need for oversized bypass capacitors in noise-sensitive analog sections. |
| Internal hysteresis | ±2.5mV built-in - prevents oscillation on noisy or slowly varying inputs without requiring external feedback resistors. |
| No phase reversal on overdriven inputs | Outputs remain valid even when inputs exceed rails by up to 0.3V - improves robustness in transient-prone systems like motor control feedback paths. |
| Ultra-low quiescent power | 48μA at 2.7V - enables always-on wake-up comparators in battery-backed real-time clocks and IoT endpoint sensors. |
Applications
| Zero-Crossing Detection | Threshold Discrimination |
|---|---|
|
Use Scenario: Detecting polarity reversals in AC line voltage or audio signals for synchronous sampling or protection logic. IC Role / Device Role / Timing Role: Comparator configured with IN− tied to ground and IN+ receiving AC-coupled signal; output toggles precisely at 0V crossing. Use Value: 120ns propagation delay and ±0.5mV offset ensure timing jitter < 50ns and trip-point accuracy within ±1mV at room temperature. |
Use Scenario: Monitoring battery voltage against low-charge cutoff threshold in portable medical devices. IC Role / Device Role / Timing Role: Single-ended comparator comparing battery voltage (via resistor divider) to stable reference; triggers shutdown when below 3.0V. Use Value: 48μA supply current minimizes parasitic drain; rail-to-rail input accepts full 0–4.2V Li-ion range without attenuation or rail extension. |
| Level Translation (3V ↔ 5V) | Ground/Supply Sensing |
|
Use Scenario: Interfacing 5V microcontroller GPIO to 3V logic peripherals in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: MAX987EUK+T used as active-high comparator with VCC = 5V and reference set to 1.5V; output drives 3V domain directly. Use Value: Push-pull output eliminates external pull-up, while 120ns delay ensures clean handshaking at >1MHz data rates without metastability. |
Use Scenario: Monitoring system supply rail integrity (e.g., 3.3V LDO output) for brown-out detection in industrial controllers. IC Role / Device Role / Timing Role: IN+ biased to 1.65V via resistor divider; IN− connected to monitored rail; output asserts fault flag when rail drops below 3.1V. Use Value: ±0.5mV offset and 250mV beyond-rail common-mode range allow direct rail monitoring without precision op-amp buffers or Zener references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3701IDBVR | Single 1.8V–5.5V comparator with 350ns delay, 800nA IQ, open-drain output - slower but ultra-low power. | Not suitable for >500kHz switching; requires external pull-up; lacks rail-to-rail input beyond rails. | Select when nanoamp quiescent current outweighs speed and rail extension requirements. |
| LMV7215M5X | Single 2.7V–5.5V comparator with 160ns delay, 100μA IQ, push-pull output - slightly higher power, same package. | Wider offset (±3mV typ), no guaranteed beyond-rail input - less accurate for mV-level thresholds. | Choose when cost sensitivity dominates and ±3mV offset is acceptable in non-precision detection. |
Compared with TLV3701IDBVR and LMV7215M5X, the MAX987EUK+T uniquely combines 120ns speed, 48μA quiescent current, rail-to-rail I/O with 250mV beyond-rail tolerance, and ±0.5mV offset - making it optimal for compact, battery-powered systems demanding both precision and responsiveness.
Availability
MAX987EUK+T is available at Aetrix Electronics and suitable for portable/battery-powered systems, zero-crossing detectors, and threshold discriminators requiring stable component supply across industrial temperature ranges.
Supply support for MAX987EUK+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 industrial, communications, and consumer applications, with emphasis on power efficiency and integration.
The MAX987 series belongs to Maxim's high-speed micropower comparator product line, engineered specifically for low-voltage, battery-constrained systems needing fast, accurate signal decision-making without sacrificing supply headroom.
FAQ
What is the maximum capacitive load the MAX987EUK+T can drive while maintaining 120ns propagation delay?
The MAX987EUK+T maintains ≤120ns propagation delay (at 100mV overdrive) with capacitive loads up to 15pF when VCC = 5V. At 50pF, delay increases to 20ns; at 200pF, it reaches 40ns. For designs requiring tight timing margins, keep load capacitance ≤15pF and use short, direct traces to preserve speed.
Does the MAX987EUK+T support dual-supply operation, and what are the limits?
Yes, the MAX987EUK+T supports dual-supply operation from ±1.25V to ±2.75V (i.e., total supply ≤ 5.5V). In dual-supply mode, VEE is connected to the negative rail (e.g., –2.5V), VCC to the positive rail (e.g., +2.5V), and inputs may swing from –2.75V to +2.75V. The device retains rail-to-rail input/output functionality across this range.
Can the MAX987EUK+T be used with input voltages exceeding the VCC rail, and how is it protected?
Yes - the MAX987EUK+T accepts input voltages up to VCC + 0.25V (and down to VEE – 0.25V) without phase reversal. Internal body diodes clamp inputs beyond rails, but sustained overvoltage (>0.3V beyond rails) causes exponential increase in input bias current. For reliable operation, limit overvoltage to <0.3V and add series current-limiting resistors if needed.
What is the output short-circuit current rating for the MAX987EUK+T, and is continuous shorting allowed?
The MAX987EUK+T output can source or sink up to 95mA (VCC = 5V) or 35mA (VCC = 2.7V) in short-circuit conditions. However, absolute maximum ratings specify a 10-second limit for continuous short-circuit duration to VEE or VCC. Prolonged shorts cause thermal stress; implement current limiting or fault detection in production designs.
How does the internal hysteresis of the MAX987EUK+T affect threshold accuracy in precision sensing applications?
The MAX987EUK+T features ±2.5mV internal hysteresis centered on its input offset voltage (±0.5mV typ). This creates a 5mV total hysteresis band, preventing chatter on noisy or slowly varying inputs. For precision applications requiring <1mV effective hysteresis, external hysteresis reduction is not supported - select a comparator without built-in hysteresis instead.
MAX987EUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 5.5V, ±1.25V ~ 2.75V
- :
- 5mV @ 5.5V
- Voltage - Input Offset (Max):
- 1pA @ 5.5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 96µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 210ns
- Propagation Delay (Max):
- ±2.5mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
MAX987EUK+T FAQ
1.How can I place an order for MAX987EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX987EUK+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 MAX987EUK+T reliable?
The price and inventory of MAX987EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX987EUK+T is usually 5 days.
3.What payment methods are accepted for MAX987EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX987EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX987EUK+T?
MAX987EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX987EUK+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 MAX987EUK+T?
For technical support, including MAX987EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX987EUK+T requirements.
6.How does Aetrix verify that MAX987EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX987EUK+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 MAX987EUK+T meets industry standards.
7.What is the process for return or replacement of MAX987EUK+T?
All MAX987EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX987EUK+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 MAX987EUK+T part is unused and in its original packaging.
Return procedure for MAX987EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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