My Inquiry
My Account
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:2,871
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX9051AESA from Analog Devices is a micropower single comparator with integrated 2.500V precision voltage reference, operating from 2.7V to 5.5V supply. It delivers 40µA quiescent current, 400ns propagation delay, rail-to-rail I/O, ±3mV internal hysteresis, and 0.4% (A grade) initial reference accuracy - ideal for low-power battery management and precision level detection.
For engineers reviewing the MAX9051AESA datasheet, MAX9051AESA pinout, MAX9051AESA application, or MAX9051AESA equivalent, key selection criteria include its SO-8 package compatibility, 2.5V reference stability over temperature (6ppm/°C typ), rail-to-rail push-pull output sourcing/sinking 8mA, and verified operation in window comparator and IR receiver circuits.
Technical Context
The MAX9051AESA integrates a single high-precision comparator with a laser-trimmed series-mode voltage reference. Its input stage supports rail-to-rail common-mode range (VEE − 0.25V to VCC + 0.25V) and ultra-low 1.0pA typical input bias current, enabling accurate sensing near supply rails.
The comparator features internal ±3mV hysteresis and a unique output stage that minimizes supply current surges during switching - reducing supply glitches and eliminating need for large bypass capacitors. The 2.500V reference provides 6ppm/°C tempco (A grade), 4.7nF capacitive-load stability, and ±500µA sourcing/sinking capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - supports direct interface with Li-ion, 3.3V, and 5V logic systems without level shifting. |
| Quiescent Supply Current | 40µA at VCC = 2.7V - enables >1-year battery life in coin-cell–powered sensors. |
| Propagation Delay | 400ns at 100mV overdrive - suitable for fast edge detection in digital line receivers and data recovery. |
| Reference Output Voltage | 2.500V ±0.4% (A grade) - provides stable threshold for ADC reference or comparator trip point calibration. |
| Input Offset Voltage | ±0.5mV (typ) - ensures sub-millivolt decision accuracy in precision battery voltage monitoring. |
| Output Drive Capability | Rail-to-rail push-pull, sinks/sources up to 8mA - directly drives LEDs, logic inputs, or small MOSFET gates without external buffers. |
| Reference Tempco | 6ppm/°C (typ) - drift < ±0.5mV over −40°C to +85°C, critical for industrial temperature sensor interfaces. |
Pinout & Package
MAX9051AESA is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard 150mil body width and 0.050" lead pitch. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Comparator Output | Rail-to-rail push-pull output; sources/sinks up to 8mA; no external pull-up required. |
| 2 (N.C.) | No Connection | Internally unconnected; must remain floating or grounded per layout best practice. |
| 3 (VEE) | Negative Supply | Ground reference for single-supply operation; connects to system GND. |
| 4 (IN−) | Inverting Input | Uncommitted input; accepts signals from VEE − 0.25V to VCC + 0.25V. |
| 5 (IN+) | Noninverting Input | Uncommitted input; same rail-to-rail common-mode range as IN−. |
| 6 (REF) | Voltage Reference Output | Stable 2.500V source; supplies up to ±500µA; stable with 0–4.7nF load capacitance. |
| 7 (VCC) | Positive Supply | 2.7V–5.5V input; powers both comparator and reference; bypass with 100nF if supply impedance >1Ω. |
| 8 (N.C.) | No Connection | Internally unconnected; leave unconnected or tie to GND for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 40µA supply current enables multi-year operation on CR2032 batteries in wireless sensor nodes. |
| Integrated Precision Reference | 2.500V A-grade reference (±0.4%, 6ppm/°C) eliminates need for external voltage reference ICs or resistor dividers. |
| Rail-to-Rail Input/Output | Common-mode range extends 250mV beyond rails; output swings within 200mV of VCC/VEE - maximizes dynamic range in low-voltage systems. |
| Glitch-Free Switching | Proprietary output stage limits supply current surge during transitions - reduces EMI and avoids destabilizing shared power rails. |
| Internal Hysteresis | ±3mV built-in hysteresis prevents chatter on slow-moving or noisy inputs - simplifies design of window comparators and level translators. |
Applications
| Battery Voltage Monitoring | IR Signal Detection |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in portable medical devices. IC Role / Device Role / Timing Role: Comparator compares cell voltage against 2.500V reference to trigger low-battery alert or cutoff logic. Use Value: 0.4% reference accuracy ensures ±10mV trip-point tolerance; 40µA ICC extends device runtime between charges. | Use Scenario: Demodulating pulsed infrared signals from remote controls in smart home hubs. IC Role / Device Role / Timing Role: High-speed comparator detects IR carrier envelope with 400ns response, rejecting ambient light noise via hysteresis. Use Value: Rail-to-rail input handles weak AC-coupled IR photodiode signals; push-pull output directly interfaces with MCU GPIO. |
| Window Comparator | Digital Line Receiver |
Use Scenario: Validating analog sensor outputs (e.g., pressure transducer) within safe operational bounds. IC Role / Device Role / Timing Role: Two MAX9051AESA units (one high-threshold, one low-threshold) generate in-window logic HIGH using shared REF. Use Value: Identical 2.500V references ensure matched trip points; ±3mV hysteresis prevents false triggering near thresholds. | Use Scenario: Converting RS-232 or TTL-level serial data into clean logic-compatible signals for microcontrollers. IC Role / Device Role / Timing Role: Comparator acts as level translator and noise filter, comparing input against 2.500V mid-rail reference. Use Value: 400ns propagation delay supports >1Mbps data rates; 8mA drive strength ensures robust signal integrity into MCU input capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator + reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9041AESA | 2.048V reference (vs. 2.500V); otherwise identical pinout, specs, and SO-8 package. | Suitable where 2.048V matches ADC full-scale or legacy system reference; not drop-in for 2.5V designs. | Select MAX9041AESA only when system architecture requires 2.048V reference alignment. |
| TLV4041IDBVR | Single comparator with internal 1.2V reference; 36µA ICC; SOT-23-6 package; no SO-8 option. | Limited to lower-voltage systems (1.8V–5.5V); reference not adjustable; smaller footprint but no direct PCB replacement. | Choose TLV4041IDBVR for space-constrained, cost-sensitive designs where 1.2V reference suffices and SO-8 is not required. |
Compared with MAX9041AESA and TLV4041IDBVR, MAX9051AESA uniquely provides 2.500V A-grade reference accuracy in SO-8 - making it optimal for industrial sensor interfaces requiring precise 2.5V thresholds and board-level compatibility with legacy layouts.
Availability
MAX9051AESA is available at Aetrix Electronics and suitable for battery management systems, IR receivers, window comparators, and digital line receivers requiring stable component supply across automotive, 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX9038–MAX9053 family was designed specifically for ultra-low-power, single-supply systems needing integrated precision comparison and stable voltage references - targeting portable instrumentation, energy harvesting, and battery-powered IoT endpoints.
FAQ
What is the reference voltage accuracy and temperature coefficient of MAX9051AESA?
The MAX9051AESA features a 2.500V precision voltage reference with ±0.4% initial accuracy (A grade) and a typical temperature coefficient of 6ppm/°C over −40°C to +85°C. This ensures the reference remains within ±0.5mV of nominal across its full operating temperature range, supporting high-accuracy threshold detection in industrial environments.
Does MAX9051AESA support rail-to-rail input and output operation?
Yes, MAX9051AESA supports rail-to-rail input with a common-mode range extending 250mV beyond both supply rails (VEE − 0.25V to VCC + 0.25V), and rail-to-rail push-pull output capable of sourcing and sinking up to 8mA. This allows direct interfacing with low-voltage microcontrollers and sensors without external level-shifting circuitry.
What is the propagation delay of MAX9051AESA, and under what conditions is it specified?
The MAX9051AESA has a propagation delay of 400ns, measured at 100mV input overdrive with CL = 15pF and VCC = 2.7V. Delay remains stable across temperature (−40°C to +85°C) and supply voltage (2.7V–5.5V), making it suitable for timing-critical applications such as digital line reception and pulse-width detection.
Can MAX9051AESA drive capacitive loads on its REF pin, and what is the maximum stable value?
Yes, MAX9051AESA's REF pin is stable with capacitive loads up to 4.7nF without oscillation. This allows direct connection to ADC reference inputs or filtering capacitors for noise reduction. For transient-heavy applications, adding a 100nF ceramic capacitor improves settling time and reduces overshoot during load steps.
Is MAX9051AESA pin-compatible with other devices in the MAX90xx family?
MAX9051AESA is pin-compatible with MAX9041AESA and MAX9039AESA in the SO-8 package, sharing identical pin assignments for OUT, VEE, IN−, IN+, REF, VCC, and N.C. terminals. However, reference voltages differ (2.500V vs. 2.048V vs. 1.230V), so substitution requires verification of reference-dependent circuit behavior.
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:
- Obsolete
- 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.
MAX9051AESA Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
