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Analog Devices Inc./Maxim Integrated MAX9043AEUB+T
- Part No.:
- MAX9043AEUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9043AEUB+T.pdf
- Description:
- IC COMPARATR 2 W/VOLT REF 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,883
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Product details
Overview
MAX9043AEUB+T from Analog Devices is a dual micropower comparator with integrated 2.048V precision voltage reference, operating from 2.5V to 5.5V supply. It delivers 55µA typical supply current, 400ns propagation delay, rail-to-rail inputs extending 250mV beyond rails, and ±3mV internal hysteresis - enabling robust battery-powered window detection in portable medical sensors.
For engineers reviewing the MAX9043AEUB+T datasheet, MAX9043AEUB+T pinout, MAX9043AEUB+T application, or MAX9043AEUB+T equivalent, key selection criteria include dual-comparator timing integrity under dynamic load, reference stability across temperature (6ppm/°C A-grade), and compatibility with low-noise, high-impedance sensor interfaces requiring sub-1pA input bias current.
Technical Context
The MAX9043AEUB+T integrates two independent comparators sharing one laser-trimmed bandgap reference. Its input stage uses CMOS architecture with body-diode protection, supporting common-mode range from VEE − 0.25V to VCC + 0.25V. Each comparator features rail-to-rail push-pull output capable of sourcing/sinking 8mA.
Reference regulation employs curvature correction and thin-film resistor trimming, achieving ±0.4% initial accuracy and stable operation with capacitive loads up to 4.7nF. The output stage minimizes supply-current surges during switching, reducing power-supply glitches without external decoupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - supports direct interface with Li-ion, 3.3V, and 5V logic domains without level shifters. |
| Supply Current (Typ) | 55µA at 2.7V - enables >1-year battery life in coin-cell–powered IoT endpoints with 1Hz wake-up rate. |
| Propagation Delay | 400ns at 100mV overdrive - ensures reliable timing margin for 1MHz signal monitoring in IR receivers. |
| Input Offset Voltage | ±0.5mV (typ) - maintains <10mV total error budget in precision battery voltage window detection. |
| Reference Voltage | 2.048V ±0.4% (A grade) - matches standard 12-bit DAC full-scale codes for seamless ADC reference sharing. |
| Input Bias Current | 1.0pA (typ) - preserves signal integrity in high-Z pH or thermistor sensor front-ends. |
| Common-Mode Range | VEE − 0.25V to VCC + 0.25V - allows direct sensing of signals below ground or above supply in industrial analog inputs. |
Pinout & Package
MAX9043AEUB+T is housed in a 10-pin µMAX® package (package code UEB), measuring 3mm × 5mm × 1.1mm, RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Comparator A output | Rail-to-rail push-pull stage; sinks/sources up to 8mA - drives LED indicators or logic inputs directly. |
| 2 (INA+) | Comparator A noninverting input | High-impedance node (1pA bias); accepts signals from VEE − 0.25V to VCC + 0.25V - interfaces with unbuffered transducer outputs. |
| 3 (INB−) | Comparator B inverting input | Uncommitted input; no internal connection to REF - enables independent threshold setting for dual-window detection. |
| 4 (INB+) | Comparator B noninverting input | Matches INA+ specs; supports differential or single-ended configurations - used for upper-threshold comparison in battery overvoltage monitoring. |
| 5 (REF) | Precision reference output | 2.048V ±0.4%, 6ppm/°C - provides stable reference for both comparators and external ADCs without additional components. |
| 6 (VEE) | Negative supply | Ground or negative rail connection; defines lower bound of common-mode range - ties to system GND in single-supply designs. |
| 7 (VCC) | Positive supply | 2.5V–5.5V input; powers both comparators and reference - decoupled with 100nF capacitor only if supply impedance exceeds 1Ω. |
| 8 (OUTB) | Comparator B output | Independent push-pull output; electrically isolated from OUTA - allows asynchronous event signaling (e.g., low-battery AND overvoltage flags). |
| 9 (INA−) | Comparator A inverting input | Uncommitted input; no internal connection to REF - enables flexible hysteresis configuration via external feedback resistors. |
| 10 (INB−) | Comparator B inverting input | Duplicate of Pin 3; fully independent - supports dual-channel analog monitoring (e.g., temperature and humidity thresholds). |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference integration | Reduces PCB area by 40% vs. discrete solutions; eliminates inter-component drift in window comparator topologies. |
| Rail-to-rail input with 250mV rail extension | Enables direct measurement of signals crossing supply boundaries - critical for detecting battery undervoltage before shutdown. |
| Internal ±3mV hysteresis | Prevents chatter on slow-moving inputs (e.g., thermistor ramps), eliminating need for external positive-feedback networks. |
| 55µA supply current at 2.7V | Supports 10-year shelf life in sealed medical devices using CR2032 batteries with 220mAh capacity. |
| Stable with 0–4.7nF REF load capacitance | Allows direct connection to ADC reference inputs or RC filters without oscillation risk - simplifies anti-aliasing design. |
Applications
| Battery Voltage Window Monitoring | IR Signal Detection |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage between 3.0V (undervoltage lockout) and 4.2V (overvoltage protection) in wearable health trackers. IC Role / Device Role / Timing Role: Dual comparator compares sensed voltage against 2.048V reference scaled by resistor dividers to set precise thresholds; REF supplies stable reference for both channels. Use Value: Eliminates external reference IC and reduces component count by 3 parts while maintaining ±10mV total threshold accuracy over −40°C to +85°C. | Use Scenario: Demodulating 38kHz IR carrier bursts from remote controls in smart home hubs. IC Role / Device Role / Timing Role: One comparator detects rising edge of filtered IR envelope; second provides hysteresis-stabilized decision threshold synchronized to carrier frequency. Use Value: 400ns propagation delay ensures <5% timing jitter at 1MHz burst rates, enabling reliable 12-bit command decoding without FPGA assistance. |
| Portable Gas Sensor Interface | Digital Line Receiver with Level Translation |
Use Scenario: Interfacing electrochemical CO sensor (output: 0–50nA) to microcontroller ADC in handheld air quality meters. IC Role / Device Role / Timing Role: First comparator triggers wake-up when sensor current exceeds threshold; second validates sustained detection to reject EMI false positives. Use Value: 1pA input bias current prevents sensor loading; dual outputs enable hardware-based debounce, cutting MCU active time by 70%. | Use Scenario: Converting 5V RS-232 logic levels to 1.8V I/O domain in battery-powered GPS modules. IC Role / Device Role / Timing Role: Comparator A compares TX line to 2.048V reference (scaled to 1.8V threshold); comparator B monitors RTS handshake with independent hysteresis. Use Value: Rail-to-rail outputs drive 1.8V logic directly; 55µA quiescent current extends runtime in always-on tracking mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator-with-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3702IDR | Single-supply dual comparator only (no integrated reference); requires external 2.048V reference (e.g., REF3020); 85µA supply current. | Increases BOM count and layout area; reference mismatch may degrade window accuracy over temperature. | Select when existing designs already use REF3020 and require identical comparator performance (420ns delay, rail-to-rail I/O). |
| MAX9062ASA+ | Dual comparator with 2.048V reference in SO-8; 65µA supply current; ±1.5mV offset (vs. ±0.5mV); no rail extension beyond rails. | Larger footprint; reduced input range limits use with sub-ground sensor signals; higher offset increases threshold uncertainty. | Select for legacy SO-8 board compatibility where µMAX® rework is impractical and 1.5mV offset is acceptable. |
Compared with TLV3702IDR and MAX9062ASA+, the MAX9043AEUB+T uniquely combines ultra-low supply current (55µA), rail-extended inputs, and laser-trimmed reference accuracy in a space-constrained µMAX® package - making it optimal for next-generation portable diagnostics where size, battery life, and precision are co-constrained.
Availability
MAX9043AEUB+T is available at Aetrix Electronics and suitable for battery management systems, IR receivers, portable gas analyzers, and digital line receivers requiring stable component supply across automotive, industrial, and medical production programs.
Supply support for MAX9043AEUB+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–MAX9043 family was designed specifically for ultra-low-power, precision threshold detection in space- and energy-constrained portable electronics - integrating reference and comparators to eliminate calibration drift and reduce system-level component count.
FAQ
What is the maximum capacitive load supported on the REF pin of MAX9043AEUB+T?
The MAX9043AEUB+T REF pin is stable with capacitive loads from 0 to 4.7nF. This allows direct connection to ADC reference inputs or RC filtering without risk of oscillation. For transient-heavy environments (e.g., motor-driven systems), a 100nF ceramic capacitor is recommended to suppress overshoot, though not required for stability. The specification is verified across −40°C to +85°C.
Does MAX9043AEUB+T support operation below 2.5V supply?
No. The absolute minimum supply voltage for MAX9043AEUB+T is 2.5V, as specified in the Electrical Characteristics table. Operation below this voltage risks undefined comparator behavior and reference instability. For sub-2.5V applications, consider the MAX9063 (1.8V min), but note it lacks integrated reference and has different pinout.
Can both comparators in MAX9043AEUB+T share the same reference voltage?
Yes. The MAX9043AEUB+T features a single, shared 2.048V precision reference (REF pin) that serves both comparators. This eliminates inter-reference mismatch and ensures consistent threshold accuracy across dual-window functions - critical for battery over/under-voltage detection where relative accuracy between thresholds matters more than absolute reference value.
What is the input common-mode voltage range for MAX9043AEUB+T?
The input common-mode voltage range for MAX9043AEUB+T is VEE − 0.25V to VCC + 0.25V at +25°C, and VEE to VCC over −40°C to +85°C. This rail-extension enables direct sensing of signals below ground (e.g., thermocouple cold-junction compensation) or above VCC (e.g., overvoltage fault detection), without external level-shifting circuitry.
Is MAX9043AEUB+T pin-compatible with other devices in the MAX90xx family?
No. MAX9043AEUB+T uses a 10-pin µMAX® package with unique pin assignments (e.g., separate INA− and INB− pins). It is not pin-compatible with 8-pin SO or µMAX variants like MAX9042, nor with SOT23-packaged members. Board layout must follow the MAX9043-specific land pattern (outline 21-0061) to ensure mechanical and electrical reliability.
MAX9043AEUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 1pA @ 5V
- Current - Input Bias (Max):
- 8mA
- Current - Output (Typ):
- 85µA
- 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
- :
- 10-uMAX/uSOP
MAX9043AEUB+T FAQ
1.How can I place an order for MAX9043AEUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9043AEUB+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 MAX9043AEUB+T reliable?
The price and inventory of MAX9043AEUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9043AEUB+T is usually 5 days.
3.What payment methods are accepted for MAX9043AEUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9043AEUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9043AEUB+T?
MAX9043AEUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9043AEUB+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 MAX9043AEUB+T?
For technical support, including MAX9043AEUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9043AEUB+T requirements.
6.How does Aetrix verify that MAX9043AEUB+T is sourced from the original manufacturer or authorized distributors?
All MAX9043AEUB+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 MAX9043AEUB+T meets industry standards.
7.What is the process for return or replacement of MAX9043AEUB+T?
All MAX9043AEUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9043AEUB+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 MAX9043AEUB+T part is unused and in its original packaging.
Return procedure for MAX9043AEUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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