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Analog Devices Inc./Maxim Integrated MAX9051AESA+
- Part No.:
- MAX9051AESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9051AESA+.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:195
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Product details
Overview
MAX9051AESA+ from Analog Devices is a micropower, single-supply comparator with integrated 2.500V precision voltage reference, featuring rail-to-rail inputs/outputs, 40μA supply current at 2.7V, 400ns propagation delay, ±0.5mV input offset voltage (typ), and internal ±3mV hysteresis - deployed in battery-powered precision level detection and window comparator circuits.
For engineers reviewing the MAX9051AESA+ datasheet, MAX9051AESA+ pinout, MAX9051AESA+ application, or MAX9051AESA+ equivalent, this page delivers verified electrical specs, SO-8 package terminal mapping, A-grade reference accuracy (±0.4% initial, 6ppm/°C tempco), and real-world design context for low-power analog signal conditioning.
Technical Context
The MAX9051AESA+ integrates a single high-precision comparator and a laser-trimmed series-mode voltage reference on a CMOS die. Its input stage supports common-mode voltages from VEE −0.25V to VCC +0.25V, with 1.0pA typical input bias current and 2.5pF input capacitance.
The output stage provides rail-to-rail push-pull drive capable of sinking/source up to 8mA, while proprietary switching-current limiting minimizes supply glitches. The 2.500V reference delivers ±0.4% initial accuracy (A grade), 6ppm/°C tempco (SO package), and stable operation with capacitive loads up to 4.7nF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - enables direct operation from Li-ion, 3.3V, or 5V rails without regulation |
| Supply Current | 40μA at 2.7V - extends battery life in always-on sensor nodes and portable instrumentation |
| Reference Voltage | 2.500V ±0.4% (A grade) - provides stable threshold for ADC reference or comparator trip point |
| Propagation Delay | 400ns at 100mV overdrive - supports fast edge detection in digital line receivers and IR demodulators |
| Input Offset Voltage | ±0.5mV (typ) - ensures sub-millivolt decision accuracy in precision battery voltage monitoring |
| Common-Mode Range | VEE −0.25V to VCC +0.25V - allows input signals beyond supply rails, easing interfacing with external sensors |
| Hysteresis | ±3mV internal - eliminates chatter on slow-moving or noisy inputs without external components |
Pinout & Package
MAX9051AESA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard JEDEC MS-012AC outline and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Comparator Output | Rail-to-rail push-pull output sourcing/sinking up to 8mA; logic-compatible with 1.8V–5V systems |
| 2 (IN−) | Comparator Inverting Input | Uncommitted input - accepts external feedback or reference for custom threshold configuration |
| 3 (IN+) | Comparator Noninverting Input | High-impedance node (1.0pA bias current) for sensing analog signals or voltage dividers |
| 4 (VEE) | Negative Supply | Ground reference pin; must be connected to system GND or negative rail |
| 5 (REF) | Voltage Reference Output | Stable 2.500V source capable of sourcing/sinking ±500μA; stable with ≤4.7nF load |
| 6 (N.C.) | No Connection | Internally unconnected - leave floating; no PCB trace required |
| 7 (VCC) | Positive Supply | Primary power input (2.7V–5.5V); bypassing with 100nF recommended near pin |
| 8 (N.C.) | No Connection | Internally unconnected - leave floating; no PCB trace required |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 40μA quiescent current enables >10-year battery life in coin-cell–powered IoT endpoints |
| Integrated Precision Reference | 2.500V A-grade reference (±0.4%, 6ppm/°C) eliminates need for external voltage reference IC |
| Rail-to-Rail I/O | Full-swing input range (VEE−0.25V to VCC+0.25V) and output swing (0V to VCC) simplify interface design |
| Glitch-Free Switching | Proprietary output stage limits supply current surges - reduces need for large bulk decoupling caps |
| Capacitive Load Stability | Stable with up to 4.7nF on REF pin - supports direct connection to ADC reference inputs or RC filters |
Applications
| Precision Battery Management | Window Comparators |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles to trigger cutoff or alert thresholds. IC Role / Device Role / Timing Role: Comparator compares sensed cell voltage against 2.500V reference to detect overvoltage/undervoltage conditions. Use Value: ±0.4% reference accuracy ensures ±10mV trip-point tolerance at 2.5V, critical for safe battery operation. | Use Scenario: Detecting if an analog sensor output falls within a defined upper/lower bound (e.g., temperature or pressure). IC Role / Device Role / Timing Role: Single MAX9051AESA+ used with external resistors to generate dual thresholds around its 2.500V reference. Use Value: Internal ±3mV hysteresis prevents oscillation at threshold boundaries under noisy conditions. |
| IR Receivers | Digital Line Receivers |
Use Scenario: Demodulating pulsed infrared signals in remote control receivers where ambient light causes DC drift. IC Role / Device Role / Timing Role: Comparator detects modulated IR carrier envelope using time-averaged self-biasing technique. Use Value: 400ns propagation delay supports >1MHz carrier frequencies; rail-to-rail output drives CMOS logic directly. | Use Scenario: Converting degraded or attenuated digital signals (e.g., RS-232, CAN stubs) back to clean logic levels. IC Role / Device Role / Timing Role: Threshold detector comparing incoming signal against 2.500V reference to regenerate TTL/CMOS-compatible output. Use Value: 2.5pF input capacitance and 1.0pA bias current minimize loading on high-impedance transmission lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator + reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9051BESA | B-grade reference (±1% initial accuracy, 100ppm/°C tempco) - lower precision, higher drift | Suitable for cost-sensitive industrial controls where ±25mV threshold tolerance is acceptable | Select when reference stability is secondary to BOM cost reduction and full temperature range (−40°C to +85°C) is required |
| TLV4041IDBVR | Single comparator only (no integrated reference); requires external 2.5V reference; 36μA ICC; 300ns tPD | Used where reference sourcing is handled separately (e.g., shared reference across multiple comparators) | Choose when system already includes a precision reference rail and board space is constrained (SOT-23 package) |
Compared with MAX9051BESA, the MAX9051AESA+ offers tighter reference accuracy and lower thermal drift - critical for battery gauging and metrology. Against TLV4041IDBVR, it trades off external reference flexibility for integration, reducing component count and layout complexity in standalone threshold detection.
Availability
MAX9051AESA+ is available at Aetrix Electronics and suitable for precision battery management, window comparator circuits, IR receivers, and digital line receivers requiring stable component supply across industrial and medical OEM programs.
Supply support for MAX9051AESA+ 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 MAX9051AESA+ belongs to the MAX9038–MAX9053 family of micropower comparator + reference ICs, designed specifically for ultra-low-power, space-constrained applications where integration, accuracy, and supply resilience are critical.
FAQ
What is the reference voltage accuracy and temperature coefficient of the MAX9051AESA+?
The MAX9051AESA+ features an A-grade 2.500V voltage reference with ±0.4% initial accuracy over temperature and a typical temperature coefficient of 6ppm/°C in the SO package. This specification is guaranteed across the −40°C to +85°C operating range and enables precise threshold setting in battery monitoring and data acquisition systems where long-term stability matters.
Does the MAX9051AESA+ require an external capacitor on the REF pin?
No, the MAX9051AESA+ does not require an external capacitor on the REF pin for stability - it is internally compensated and remains stable with capacitive loads up to 4.7nF. However, adding a small ceramic capacitor (e.g., 100nF) is recommended in transient-heavy environments to improve settling and reduce overshoot during load or supply steps.
What is the maximum load current the REF pin can source or sink?
The REF pin of the MAX9051AESA+ can source or sink up to ±500μA while maintaining specified accuracy and stability. Exceeding this current may cause reference voltage deviation beyond the ±0.4% initial tolerance, especially under varying temperature or supply conditions - verify load requirements against the Electrical Characteristics table in the official datasheet.
Can the MAX9051AESA+ operate from a 2.5V supply?
No - the MAX9051AESA+ has a minimum supply voltage of 2.7V per its datasheet specifications. It is part of the MAX9050–MAX9053 subgroup, which is rated for 2.7V to 5.5V operation. Attempting to power it from 2.5V may result in undefined behavior, reference instability, or failure to meet propagation delay and offset voltage specifications.
Is the MAX9051AESA+ pin-compatible with other devices in the MAX90xx family?
The MAX9051AESA+ shares the same 8-pin SO pinout with MAX9041AESA, MAX9050AESA, and MAX9051BESA, but differs functionally: pins 6 and 8 are N.C. (not connected), whereas dual-comparator variants like MAX9042AESA use those pins for second comparator I/O. Always verify functional pin mapping - not just physical layout - before substitution.
MAX9051AESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- with Voltage Reference
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 1pA @ 5V
- Current - Input Bias (Max):
- 8mA
- Current - Output (Typ):
- 72µA
- 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
MAX9051AESA+ FAQ
1.How can I place an order for MAX9051AESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9051AESA+ 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 MAX9051AESA+ reliable?
The price and inventory of MAX9051AESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9051AESA+ is usually 5 days.
3.What payment methods are accepted for MAX9051AESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9051AESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9051AESA+?
MAX9051AESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9051AESA+ 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 MAX9051AESA+?
For technical support, including MAX9051AESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9051AESA+ requirements.
6.How does Aetrix verify that MAX9051AESA+ is sourced from the original manufacturer or authorized distributors?
All MAX9051AESA+ 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 MAX9051AESA+ meets industry standards.
7.What is the process for return or replacement of MAX9051AESA+?
All MAX9051AESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9051AESA+, 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 MAX9051AESA+ part is unused and in its original packaging.
Return procedure for MAX9051AESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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