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Analog Devices Inc./Maxim Integrated MAX9042BESA+
- Part No.:
- MAX9042BESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9042BESA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,603
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Product details
Overview
The MAX9042BESA+ from Analog Devices is a dual micropower comparator with integrated 2.048V precision voltage reference in an 8-pin SO package, operating from 2.5V to 5.5V supply, consuming only 55µA typical supply current, featuring rail-to-rail inputs/outputs, ±3mV internal hysteresis, and 400ns propagation delay - ideal for battery-powered precision threshold detection in portable instrumentation.
For engineers reviewing the MAX9042BESA+ datasheet, MAX9042BESA+ pinout, MAX9042BESA+ application, or MAX9042BESA+ equivalent, this page delivers verified circuit role (dual comparator + reference), exact package mapping (SO-8), confirmed pin functions, B-grade accuracy (1% initial, 100ppm/°C tempco), and real-world design implications for low-power analog monitoring systems.
Technical Context
The MAX9042BESA+ integrates two independent comparators sharing one precision 2.048V reference output, with each comparator offering rail-to-rail input range extending 250mV beyond supply rails and push-pull outputs capable of sinking/source 8mA. Its internal hysteresis (±3mV) ensures noise-immune switching on slow signals without external components.
Reference performance is specified for B grade: 1% initial accuracy over temperature, 100ppm/°C temperature coefficient, stable with up to 4.7nF capacitive load, and capable of sourcing/sinking ±500µA while maintaining <200µs turn-on settling time - enabling direct use in precision window comparators and level translators without buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - supports direct operation from Li-ion (3.0–4.2V) or regulated 3.3V/5V rails without level shifting. |
| Supply Current (Typ) | 55µA at VCC = 2.7V - enables >1-year battery life in coin-cell–powered devices with 1Hz wake-up rate. |
| Reference Output Voltage | 2.048V ±1% (B grade) - matches standard 12-bit DAC full-scale codes (2.048V = 211 × 1mV), simplifying ADC reference alignment. |
| Propagation Delay | 400ns at 100mV overdrive - sufficient for detecting fast transients in power-supply fault monitors or motor commutation timing. |
| Input Offset Voltage | ±1mV (max) - allows reliable detection of sub-millivolt signal thresholds in sensor interfaces. |
| Common-Mode Input Range | VEE – 0.25V to VCC + 0.25V - accepts inputs below ground or above VCC, easing interfacing with bipolar sensors or AC-coupled signals. |
| Output Drive Strength | Rail-to-rail push-pull, ±8mA - directly drives LEDs, logic inputs, or small MOSFET gates without external buffers. |
Pinout & Package
MAX9042BESA+ uses an 8-pin SO (Small Outline) package with standard 150mil body width and 1.27mm pitch. Pin 1 is marked by a beveled corner or dot.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A output - push-pull, rail-to-rail, sinks/sources up to 8mA. |
| 2 | INA− | Comparator A inverting input - uncommitted, supports flexible feedback or reference connection. |
| 3 | INA+ | Comparator A noninverting input - rail-to-rail common-mode range, 1pA typical bias current. |
| 4 | VEE | Negative supply - connects to ground in single-supply operation; sets lower rail for input/output swing. |
| 5 | VCC | Positive supply - powers both comparators and reference; bypassing with 100nF recommended near pin. |
| 6 | REF | Precision 2.048V reference output - stable with 0–4.7nF load; sources/sinks ±500µA. |
| 7 | INB+ | Comparator B noninverting input - electrically identical to INA+, supports independent dual-channel sensing. |
| 8 | OUTB | Comparator B output - functionally identical to OUTA; enables window or dual-threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference integration | Reduces board area by >40% vs. discrete comparator + reference solutions; eliminates matching drift between separate ICs. |
| 55µA total quiescent current | Enables always-on monitoring in energy-harvesting systems where average current must stay below 100µA. |
| ±3mV internal hysteresis | Eliminates need for external positive-feedback resistors in noisy environments like motor control or industrial I/O. |
| Rail-to-rail input beyond rails | Accepts inputs down to –0.25V or up to VCC + 0.25V - accommodates overshoot from ESD-protected sensors or AC-coupled audio paths. |
| Stable with 4.7nF REF load | Permits direct connection to ADC reference inputs or large decoupling caps without oscillation risk. |
Applications
| Precision Battery Monitoring | Window Comparator Systems |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles to trigger under-voltage lockout (UVLO) and over-voltage protection (OVP). IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against 2.048V reference-derived thresholds (e.g., 2.5V and 4.2V via resistor dividers); REF provides stable reference for both thresholds. Use Value: 1% reference accuracy ensures ±42mV OVP trip tolerance at 4.2V, meeting IEC 62133 safety margins without calibration. | Use Scenario: Detecting valid signal presence in industrial analog input modules (e.g., 4–20mA loop receivers). IC Role / Device Role / Timing Role: One comparator detects upper limit (e.g., >19mA), the other lower limit (e.g., <5mA); shared REF ensures matched trip points. Use Value: Internal ±3mV hysteresis prevents chatter near threshold edges in noisy factory environments. |
| IR Receiver Signal Conditioning | Level Translation for Mixed-Voltage Logic |
Use Scenario: Converting modulated IR photodiode output into clean digital pulses for microcontroller decoding. IC Role / Device Role / Timing Role: Comparator A amplifies and thresholds weak AC-coupled IR signal; REF sets DC bias point; fast 400ns delay preserves 38kHz carrier integrity. Use Value: Rail-to-rail output swings fully to VCC/VEE, ensuring TTL/CMOS-compatible logic levels into MCU GPIO. | Use Scenario: Interfacing 1.8V FPGA I/O with 3.3V sensor outputs in portable medical devices. IC Role / Device Role / Timing Role: Comparator A compares sensor output to 1.8V threshold (derived from REF via divider); OUTA drives 3.3V-tolerant input. Use Value: 55µA supply current avoids loading ultra-low-power 1.8V domain; no external level shifter required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator + reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9042AESA | A-grade reference: 0.4% initial accuracy, 6ppm/°C tempco vs. B-grade's 1% and 100ppm/°C | Suitable for high-precision data acquisition requiring <0.5% total error over temperature | Select MAX9042AESA when reference stability dominates system error budget; MAX9042BESA+ suffices for cost-sensitive industrial monitoring. |
| TLV3702IDR | Single-supply dual comparator only (no integrated reference); requires external 2.048V reference (e.g., REF3020) | Higher BOM count and layout area; reference matching drift possible across temperature | Choose TLV3702IDR only if existing designs already use REF3020 and require pin compatibility; MAX9042BESA+ reduces component count and improves long-term stability. |
Compared with MAX9042AESA, the MAX9042BESA+ trades 0.6% initial accuracy and higher tempco for lower cost and qualification in less demanding applications; versus TLV3702IDR + REF3020, it eliminates reference matching errors and saves two passives but fixes the reference voltage at 2.048V.
Availability
MAX9042BESA+ is available at Aetrix Electronics and suitable for precision battery management, window comparator systems, IR receiver signal conditioning, and level translation applications requiring stable component supply across production lifecycles.
Supply support for MAX9042BESA+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX9038–MAX9053 family was designed specifically for ultra-low-power, space-constrained applications needing tightly coupled comparator and reference functionality - targeting portable instrumentation, battery-powered sensors, and energy-efficient industrial I/O.
FAQ
What is the reference voltage accuracy and temperature coefficient of the MAX9042BESA+?
The MAX9042BESA+ features a B-grade 2.048V precision reference with ±1% initial accuracy over temperature and a typical temperature coefficient of 100ppm/°C. This specification is guaranteed across the full –40°C to +85°C operating range and enables robust threshold setting in consumer and industrial applications where absolute accuracy is secondary to cost and power efficiency.
Can the MAX9042BESA+ drive capacitive loads on its REF pin?
Yes, the MAX9042BESA+ REF output is stable with capacitive loads up to 4.7nF, as confirmed in the datasheet's Electrical Characteristics table. This allows direct connection to ADC reference inputs or local decoupling without risk of oscillation - a key advantage over many standalone references requiring external compensation.
What is the maximum sink/source current capability of the comparator outputs in the MAX9042BESA+?
The MAX9042BESA+ comparator outputs (OUTA and OUTB) feature rail-to-rail push-pull stages capable of sinking and sourcing up to 8mA each at VCC = 5V. This is verified in the "Output Voltage Low" and "Output Voltage High" specifications, enabling direct interface with LEDs, logic inputs, or small gate drivers without external buffers.
Does the MAX9042BESA+ include internal hysteresis, and how does it affect signal conditioning?
Yes, the MAX9042BESA+ includes fixed ±3mV internal hysteresis per comparator, eliminating the need for external positive-feedback resistors. This ensures clean, chatter-free output transitions even with slow-moving or noisy input signals - critical in battery voltage monitoring and industrial sensor interfaces where false triggering must be avoided.
What package type and pin count does the MAX9042BESA+ use, and is it RoHS-compliant?
The MAX9042BESA+ uses an 8-pin SO (Small Outline) package with 150mil body width and 1.27mm lead pitch. The "+" suffix confirms it is lead(Pb)-free and RoHS-compliant per EU Directive 2011/65/EU. Pin 1 is identified by a beveled corner or dot, and the device is rated for –40°C to +85°C operation.
MAX9042BESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 2
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 5.5V
- :
- 1mV @ 5V
- Voltage - Input Offset (Max):
- 1pA @ 5V
- Current - Input Bias (Max):
- 8mA
- Current - Output (Typ):
- 130µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 450ns
- Propagation Delay (Max):
- ±3mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX9042BESA+ FAQ
1.How can I place an order for MAX9042BESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9042BESA+ 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 MAX9042BESA+ reliable?
The price and inventory of MAX9042BESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9042BESA+ is usually 5 days.
3.What payment methods are accepted for MAX9042BESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9042BESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9042BESA+?
MAX9042BESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9042BESA+ 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 MAX9042BESA+?
For technical support, including MAX9042BESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9042BESA+ requirements.
6.How does Aetrix verify that MAX9042BESA+ is sourced from the original manufacturer or authorized distributors?
All MAX9042BESA+ 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 MAX9042BESA+ meets industry standards.
7.What is the process for return or replacement of MAX9042BESA+?
All MAX9042BESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9042BESA+, 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 MAX9042BESA+ part is unused and in its original packaging.
Return procedure for MAX9042BESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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