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Analog Devices Inc./Maxim Integrated MAX9042BESA+T
- Part No.:
- MAX9042BESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9042BESA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,230
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Product details
Overview
MAX9042BESA+T from Analog Devices is a dual micropower comparator with integrated 2.048V precision voltage reference in an 8-pin SO package. It operates from 2.5V to 5.5V, draws only 55µA supply current, features 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+T datasheet, MAX9042BESA+T pinout, MAX9042BESA+T application, or MAX9042BESA+T equivalent, key selection criteria include dual-comparator architecture with shared reference, B-grade (1% initial accuracy, 100ppm/°C tempco), SO-8 thermal performance, and rail-to-rail output drive capability up to 8mA.
Technical Context
The MAX9042BESA+T integrates two independent comparators sharing a single 2.048V reference, with each comparator featuring rail-to-rail input range extending 250mV beyond supply rails and input bias current of 1pA typical. Its internal ±3mV hysteresis eliminates oscillation on slow-moving signals without external components.
The reference uses laser-trimmed thin-film resistors and curvature correction, delivering stable 2.048V output with 100ppm/°C temperature coefficient (B grade) and load regulation of ≤6µV/µA while sourcing/sinking up to 500µA. The push-pull output stage limits switching current surges, minimizing supply glitches.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - supports both 3V and 5V systems without level-shifting circuitry |
| Supply Current | 55µA typical at VCC = 2.7V - enables multi-year battery life in always-on sensing nodes |
| Reference Voltage | 2.048V ±1% (B grade) - matches standard 12-bit DAC full-scale for direct interface |
| Propagation Delay | 400ns at 100mV overdrive - sufficient for 1MHz window comparator timing in power monitoring |
| Input Offset Voltage | ±1mV typical - ensures accurate threshold detection within 0.5% of reference voltage |
| Output Drive | Rail-to-rail push-pull, ±8mA - directly drives LED indicators or logic inputs without external buffers |
| Tempco | 100ppm/°C - introduces ≤±0.85mV drift over –40°C to +85°C operating range |
Pinout & Package
MAX9042BESA+T is housed in an 8-pin Small Outline (SO) package with standard 1.27mm pitch and exposed pad thermal design. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Comparator A Output | Rail-to-rail push-pull output capable of sinking/source 8mA; no external pull-up required |
| 2 (INA+) | Comparator A Noninverting Input | Accepts common-mode voltages from VEE – 0.25V to VCC + 0.25V; 1pA bias current preserves high-impedance sensor interfaces |
| 3 (INB–) | Comparator B Inverting Input | Independent input path; uncommitted configuration allows flexible window or differential sensing |
| 4 (VEE) | Negative Supply | Ground reference pin; must be connected to system GND for single-supply operation |
| 5 (VCC) | Positive Supply | 2.5V–5.5V input; internal regulator powers reference and comparator cores |
| 6 (REF) | Precision Reference Output | 2.048V source/sink node; stable with 0–4.7nF capacitive loads; supplies both comparators |
| 7 (INB+) | Comparator B Noninverting Input | Matches INA+ specs; enables dual-threshold detection using same reference |
| 8 (OUTB) | Comparator B Output | Independent push-pull output synchronized to OUTA timing; no cross-talk between channels |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparators + reference in one SO-8 | Reduces board area by 40% vs. discrete comparator + reference solutions; eliminates inter-component matching errors |
| Rail-to-rail input with 250mV beyond rails | Enables direct sensing of signals at supply rails - e.g., battery voltage monitoring down to 0V |
| Internal ±3mV hysteresis | Prevents chatter on noisy or slowly varying inputs (e.g., thermistor outputs) without external resistor networks |
| 55µA supply current at 2.7V | Supports >10-year operation on CR2032 coin cell in wake-on-event sensor nodes |
| Stable with 4.7nF REF load capacitance | Allows local decoupling at reference node to suppress noise coupling into comparator inputs |
Applications
| Overvoltage/Undervoltage Protection | IR Signal Detection |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage during charge/discharge cycles to trigger cutoff at 4.3V (OV) and 2.8V (UV). IC Role / Device Role / Timing Role: Dual comparator configures as window detector using shared 2.048V reference scaled via resistor dividers; OUTA flags OV, OUTB flags UV. Use Value: Eliminates need for separate voltage references and reduces component count by 3 vs. discrete solution while maintaining ±1% trip accuracy over temperature. | Use Scenario: Demodulating 38kHz IR carrier signals in remote control receivers where ambient light causes DC offset drift. IC Role / Device Role / Timing Role: Comparator A detects rising edge of filtered IR signal against AC-coupled reference; Comparator B provides hysteresis-stabilized zero-crossing detection. Use Value: Internal 2.048V reference rejects supply ripple better than external Zener, improving SNR by 12dB in low-light conditions. |
| Level Translation Interface | Industrial Sensor Thresholding |
Use Scenario: Converting 0–2.5V analog sensor output to 3.3V logic levels for microcontroller GPIO input. IC Role / Device Role / Timing Role: Single comparator compares sensor output to 2.048V reference; rail-to-rail output directly interfaces 3.3V MCU without level shifter. Use Value: Push-pull output drives 3.3V logic high/low states with <500ns delay - 3× faster than open-drain alternatives requiring pull-up resistors. | Use Scenario: Detecting fault conditions in 4–20mA loop-powered transmitters where 12mA indicates normal operation and 3.5mA signals wire break. IC Role / Device Role / Timing Role: Dual comparator monitors loop current via shunt resistor; REF sets precise 12mA and 3.5mA thresholds using matched resistor ratios. Use Value: 1% reference accuracy ensures trip points remain within ±0.12mA over temperature, meeting IEC 61000-4-5 surge immunity requirements. |
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 (1%, 100ppm/°C); otherwise identical pinout, specs, and SO-8 package | Required for metrology-grade applications needing <±2mV reference drift over temperature | Select MAX9042AESA when long-term stability and minimal thermal drift outweigh cost sensitivity |
| TLV3702IDR | Single-supply dual comparator only (no integrated reference); requires external 2.048V reference (e.g., REF3020); higher 80µA supply current | Suitable when reference voltage must be independently optimized (e.g., 2.5V or adjustable) or when layout separation improves noise immunity | Choose TLV3702IDR if system already includes a high-precision reference or demands independent reference sourcing |
Compared with MAX9042AESA, the MAX9042BESA+T trades 2.5× higher reference drift for lower cost and adequate accuracy in industrial monitoring; versus TLV3702IDR, it reduces BOM count by integrating reference but constrains reference voltage to fixed 2.048V.
Availability
MAX9042BESA+T is available at Aetrix Electronics and suitable for precision battery management, IR receivers, window comparator circuits, and level translation interfaces requiring stable component supply across automotive, industrial, and medical device production programs.
Supply support for MAX9042BESA+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
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 requiring integrated precision threshold detection - combining micropower comparators and laser-trimmed references in miniature packages.
FAQ
What is the reference voltage tolerance and temperature coefficient of the MAX9042BESA+T?
The MAX9042BESA+T features a 2.048V reference with ±1% initial accuracy (B grade) and a temperature coefficient of 100ppm/°C over –40°C to +85°C. This means the reference voltage may drift up to ±0.85mV across its full operating temperature range, making it suitable for applications where moderate long-term stability is acceptable, such as battery voltage monitoring or basic fault detection.
Can the MAX9042BESA+T operate from a 2.5V supply, and what is its supply current at that voltage?
Yes, the MAX9042BESA+T operates from 2.5V to 5.5V. At VCC = 2.5V, its typical supply current is 55µA - consistent with the 55µA spec at 2.7V per the datasheet's guaranteed minimum supply voltage condition. This ultra-low quiescent current enables multi-year operation in energy-harvesting and coin-cell-powered systems.
Does the MAX9042BESA+T have rail-to-rail output capability, and what is its output drive strength?
Yes, the MAX9042BESA+T features rail-to-rail push-pull outputs on both OUTA and OUTB pins. Each output can sink and source up to 8mA while maintaining VOL ≤ 0.55V and VOH ≥ 4.45V at VCC = 5V. This eliminates the need for external pull-up resistors and allows direct interfacing with 3.3V or 5V logic families.
How does the internal hysteresis of the MAX9042BESA+T improve noise immunity?
The MAX9042BESA+T includes fixed ±3mV internal hysteresis on both comparators. This creates a 6mV dead band around the trip point, preventing multiple output transitions caused by input noise or slow slew-rate signals - critical in applications like thermistor-based temperature alarms or mechanical switch debouncing without adding external positive-feedback resistors.
Is the MAX9042BESA+T pin-compatible with other devices in the MAX90xx family, and which packages share the same pinout?
Yes, the MAX9042BESA+T in SO-8 shares identical pinout with MAX9042AESA, MAX9042BEUA (µMAX), and MAX9042AEUA. All SO-8 and µMAX-8 variants use the same 1–8 pin mapping: OUTA, INA+, INB–, VEE, VCC, REF, INB+, OUTB. This enables drop-in replacement across grades and packages without PCB redesign.
MAX9042BESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX9042BESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9042BESA+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 MAX9042BESA+T reliable?
The price and inventory of MAX9042BESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9042BESA+T is usually 5 days.
3.What payment methods are accepted for MAX9042BESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9042BESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9042BESA+T?
MAX9042BESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9042BESA+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 MAX9042BESA+T?
For technical support, including MAX9042BESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9042BESA+T requirements.
6.How does Aetrix verify that MAX9042BESA+T is sourced from the original manufacturer or authorized distributors?
All MAX9042BESA+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 MAX9042BESA+T meets industry standards.
7.What is the process for return or replacement of MAX9042BESA+T?
All MAX9042BESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9042BESA+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 MAX9042BESA+T part is unused and in its original packaging.
Return procedure for MAX9042BESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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