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Analog Devices Inc./Maxim Integrated MAX9043BEUB
- Part No.:
- MAX9043BEUB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9043BEUB.pdf
- Description:
- IC COMPARATR 2 W/VOLT REF 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,604
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Product details
Overview
MAX9043BEUB from Analog Devices is a dual micropower comparator with integrated 2.048V precision voltage reference, operating from 2.5V to 5.5V single supply. It delivers rail-to-rail inputs/outputs, 400ns propagation delay, ±3mV internal hysteresis, and only 55µA supply current - ideal for battery-powered precision level detection in portable instrumentation.
For engineers reviewing the MAX9043BEUB datasheet, MAX9043BEUB pinout, MAX9043BEUB application, or MAX9043BEUB equivalent, key selection criteria include its dual-comparator + reference integration in µMAX-10, A/B-grade reference accuracy (±0.4% or ±1%), low-input-bias-current (1pA typ), and stable operation with up to 4.7nF capacitive load on REF.
Technical Context
The MAX9043BEUB integrates two independent comparators sharing one precision 2.048V reference, each with rail-to-rail input range extending 250mV beyond VEE/VCC and push-pull output capable of sinking/sourcing 8mA. Its input stage uses CMOS architecture with typical 1.0pA bias current and ±0.5mV offset voltage (A grade).
Internal ±3mV hysteresis ensures noise-immune switching without external components, while the unique output stage minimizes supply current surges during transitions - reducing power-supply glitches and eliminating need for large bypass capacitors in low-noise systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - supports direct interface with 3V and 5V logic domains without level shifters. |
| Supply Current | 55µA typ at 5V - enables >1-year battery life in coin-cell–powered devices with 1Hz wake-up rate. |
| Reference Voltage | 2.048V ±0.4% (A grade) - matches standard 12-bit DAC full-scale codes (2.048V = 211 × 1mV) for seamless ADC/DAC reference sharing. |
| Propagation Delay | 400ns at 100mV overdrive - sufficient for 1MHz window comparator response in battery management fault detection. |
| Input Offset Voltage | ±0.5mV max (A grade) - enables accurate 1mV-level threshold detection in sensor signal conditioning. |
| Capacitive Load Stability | 0–4.7nF on REF - allows direct connection to ADC reference inputs or RC filtering without oscillation risk. |
Pinout & Package
MAX9043BEUB is housed in a 10-pin µMAX package (3.0mm × 5.0mm, 0.65mm pitch), RoHS-compliant and lead-free. The package supports fine-pitch PCB assembly and provides thermal performance suitable for industrial temperature range (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply input - must be decoupled locally with 100nF capacitor to suppress high-frequency noise coupling into reference/comparators. |
| 2 | OUTA | Comparator A push-pull output - drives logic loads directly; no external pull-up required for CMOS/TTL interfacing. |
| 3 | INA+ | Comparator A noninverting input - accepts signals from VEE − 0.25V to VCC + 0.25V, enabling overvoltage-tolerant sensing. |
| 4 | INA− | Comparator A inverting input - uncommitted; may be tied to REF or external threshold for single-ended or differential configurations. |
| 5 | REF | Precision 2.048V reference output - sources/sinks up to 500µA; stable with 0–4.7nF capacitive load for ADC reference buffering. |
| 6 | VEE | Negative supply (typically GND) - serves as common return for both comparators and reference; requires low-impedance ground plane. |
| 7 | INB− | Comparator B inverting input - independently configurable; enables dual-threshold (window) detection when paired with INA+ or REF. |
| 8 | INB+ | Comparator B noninverting input - identical electrical specs to INA+; supports independent signal path routing on PCB. |
| 9 | OUTB | Comparator B push-pull output - electrically isolated from OUTA; allows independent control of two system functions (e.g., charge/discharge enable). |
| 10 | N.C. | No internal connection - left floating or grounded per layout best practice; no functional impact if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + precision reference | Reduces BOM count by 3 components vs. discrete comparator + reference + divider solution; saves >2.5mm² PCB area in µMAX-10. |
| Rail-to-rail I/O with 250mV beyond rails | Enables direct monitoring of battery voltage down to 0.25V above ground or up to 0.25V above VCC - critical for end-of-life detection in Li-ion cells. |
| 55µA total supply current | Permits continuous monitoring at <1µW quiescent power - essential for always-on IoT node wake-up circuitry. |
| ±3mV internal hysteresis | Eliminates need for external positive feedback resistors in noisy environments (e.g., motor drive feedback), simplifying design and improving reliability. |
| Stable with 4.7nF REF load | Supports direct connection to SAR ADC reference pins (e.g., AD7980, AD7685) without destabilizing the reference or degrading SNR. |
Applications
| Battery Voltage Monitoring | Window Comparator |
|---|---|
Use Scenario: Real-time monitoring of 3.7V Li-ion cell voltage during charging/discharging 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 REF-derived thresholds (e.g., 2.8V and 4.2V via resistor dividers); REF provides stable reference for both thresholds. Use Value: Enables ±10mV threshold accuracy across -40°C to +85°C using A-grade part, meeting IEC 62133 safety requirements for portable batteries. | Use Scenario: Detecting valid signal presence in industrial analog sensor outputs (e.g., 4–20mA loop transmitters) by verifying signal stays within defined upper/lower bounds. IC Role / Device Role / Timing Role: One comparator monitors upper limit (INB+ tied to REF, INB− to scaled input), second monitors lower limit (INA+ to scaled input, INA− to REF); outputs OR'd externally. Use Value: 400ns propagation delay ensures <500ns total window detection latency - fast enough to prevent PLC I/O module damage from out-of-range signals. |
| IR Receiver Signal Conditioning | Digital Line Receiver |
Use Scenario: Converting weak, noisy 38kHz modulated IR photodiode signals into clean digital pulses for microcontroller decoding in remote controls. IC Role / Device Role / Timing Role: Comparator A detects carrier envelope (INA+ to filtered photodiode, INA− to DC bias), Comparator B provides hysteresis-enhanced demodulation (INB+ to envelope, INB− to adjustable threshold). Use Value: 1pA input bias current prevents loading of high-impedance photodiode preamp; rail-to-rail output drives MCU GPIO directly without level-shifting. | Use Scenario: Receiving RS-232 or proprietary differential serial data in space-constrained medical devices where ESD robustness and low power are mandatory. IC Role / Device Role / Timing Role: Single comparator (e.g., OUTA) acts as line receiver with REF as threshold; INA+ accepts attenuated signal, INA− tied to REF for precise 0V-crossing detection. Use Value: 250mV beyond-rail input range accommodates ±12V RS-232 inputs via simple resistive divider; 55µA current extends battery runtime in portable diagnostics tools. |
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 |
|---|---|---|---|
| MAX9042BEUA | Same dual-comparator + 2.048V reference architecture, but in 8-pin µMAX; INB− internally tied to REF (not uncommitted). | Limited flexibility for independent dual-threshold designs requiring separate INB− configuration. | Select MAX9042BEUA only when REF-referenced second comparator suffices and board space permits larger 8-pin footprint. |
| TLV3702IDR | Low-power dual comparator (1.2µA/ch) with no integrated reference; requires external 2.048V source (e.g., REF3020). | Higher BOM count and PCB area; reference accuracy and tempco depend on external component selection. | Choose TLV3702IDR when ultra-low supply current (<2µA) dominates over integration benefits and reference stability can be managed externally. |
Compared with MAX9042BEUA, MAX9043BEUB offers fully independent INB− for flexible window or dual-threshold topologies, while TLV3702IDR trades integration for extreme quiescent current reduction - making MAX9043BEUB optimal for space-constrained, reference-stability-critical applications like portable battery analyzers.
Availability
MAX9043BEUB is available at Aetrix Electronics and suitable for battery management systems, industrial sensor interfaces, portable medical devices, and IoT edge nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX9043BEUB 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/MAX9050–MAX9053 family was designed specifically for micropower, single-supply systems needing integrated precision reference and comparator functionality - targeting portable instrumentation, energy harvesting, and always-on monitoring applications.
FAQ
What is the reference voltage accuracy and temperature coefficient of MAX9043BEUB?
The MAX9043BEUB is a B-grade device with ±1% initial accuracy and 100ppm/°C temperature coefficient for its 2.048V reference output. This specification applies across the full -40°C to +85°C operating range and is laser-trimmed during production. The A-grade variant (MAX9043AEUB) offers tighter ±0.4% initial accuracy and 6ppm/°C tempco.
Can MAX9043BEUB drive an ADC reference input directly?
Yes, MAX9043BEUB can drive an ADC reference input directly. Its 2.048V reference output is stable with capacitive loads up to 4.7nF and sources/sinks ±500µA. When connecting to SAR ADCs like the AD7980, ensure the ADC's reference input capacitance falls within this range and that supply decoupling meets Analog Devices' layout guidelines to maintain 12-bit effective resolution.
What is the maximum capacitive load allowed on the REF pin of MAX9043BEUB?
The maximum stable capacitive load on the REF pin of MAX9043BEUB is 4.7nF, as confirmed in the datasheet's Electrical Characteristics table under "Capacitive-Load Stability Range". Loads exceeding this value may cause reference output instability or overshoot during turn-on; for transient-heavy applications, a small series resistor (e.g., 1Ω) can be added to dampen resonance without affecting DC accuracy.
Does MAX9043BEUB support rail-to-rail input operation beyond the supply rails?
Yes, MAX9043BEUB supports rail-to-rail input operation with a common-mode voltage range extending 250mV beyond both VEE and VCC rails (i.e., VEE − 0.25V to VCC + 0.25V). This allows direct interface with overvoltage signals such as battery packs or industrial sensors without external clamping diodes, though input current must remain within ±20mA absolute maximum rating.
How does the internal hysteresis of MAX9043BEUB improve noise immunity?
The internal hysteresis of MAX9043BEUB is ±3mV, meaning the comparator switches at different thresholds depending on output state - e.g., rising input crosses 2.045V to trigger high-to-low transition, then must fall below 2.051V to switch back. This 6mV hysteresis band rejects noise spikes ≤3mV peak-to-peak, eliminating false triggering in electrically noisy environments like motor control feedback loops without requiring external hysteresis resistors.
MAX9043BEUB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- 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
- :
- 10-uMAX/uSOP
MAX9043BEUB FAQ
1.How can I place an order for MAX9043BEUB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9043BEUB 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 MAX9043BEUB reliable?
The price and inventory of MAX9043BEUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9043BEUB is usually 5 days.
3.What payment methods are accepted for MAX9043BEUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9043BEUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9043BEUB?
MAX9043BEUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9043BEUB 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 MAX9043BEUB?
For technical support, including MAX9043BEUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9043BEUB requirements.
6.How does Aetrix verify that MAX9043BEUB is sourced from the original manufacturer or authorized distributors?
All MAX9043BEUB 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 MAX9043BEUB meets industry standards.
7.What is the process for return or replacement of MAX9043BEUB?
All MAX9043BEUB units undergo pre-shipment inspection (PSI). If there is an issue with MAX9043BEUB, 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 MAX9043BEUB part is unused and in its original packaging.
Return procedure for MAX9043BEUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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