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Analog Devices Inc./Maxim Integrated MAX9028EBT-T
- Part No.:
- MAX9028EBT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 6-WFBGA, WLBGA
- Datasheet:
-
MAX9028EBT-T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,203
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Product details
Overview
MAX9028EBT-T from Maxim Integrated is an open-drain, nanopower comparator in a 6-bump UCSP package, designed for ultra-low-power battery monitoring. It operates from +1.8V to +5.5V, draws only 0.6µA supply current at 1.8V, features Beyond-the-Rails™ inputs (VEE − 0.2V to VCC + 0.2V), and delivers rail-to-rail output swing up to 5.5V above VEE - ideal for 2-cell Li-ion or alkaline battery management systems.
For engineers reviewing the MAX9028EBT-T datasheet, MAX9028EBT-T pinout, MAX9028EBT-T application, or MAX9028EBT-T equivalent, this page provides verified functional identity, validated UCSP-6 pin mapping, confirmed open-drain output behavior, measured 4mV internal hysteresis, and real-world timing performance (tPD− = 16µs at 1.8V) - all critical for low-voltage, long-life portable designs.
Technical Context
The MAX9028EBT-T implements a break-before-make output stage optimized for minimal supply-current surge during switching, eliminating typical comparator-induced supply glitches. Its input stage supports common-mode voltages beyond both rails by ±200mV and includes internal 4mV hysteresis to prevent oscillation with slow or noisy signals.
This device lacks an integrated reference (unlike MAX9025/MAX9026) and relies on external threshold sources. Its open-drain output enables mixed-voltage logic-level translation (e.g., 5V-to-3V), wire-OR bus interfacing, and pull-up to voltages up to 5.5V above VEE - making it suitable for heterogeneous power-domain systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 0.6µA at 1.8V - enables >2.8 million hours of operation on a 2000mAh alkaline 2-cell battery |
| Input Voltage Range | VEE − 0.2V to VCC + 0.2V - allows direct sensing at ground or supply rail without level-shifting |
| Output Type | Open-drain - supports voltage translation up to 5.5V above VEE and wired-AND bus topologies |
| Propagation Delay | tPD− = 16µs at 1.8V - ensures responsive detection in low-power wake-up circuits |
| Input Offset Voltage | ≤10mV over −40°C to +85°C - maintains accuracy across industrial temperature range |
| Hysteresis | 4mV (input-referred) - suppresses chatter from noise or slow-moving sensor signals |
| Operating Voltage | +1.8V to +5.5V - matches discharge profile of 2-cell alkaline (1.8V–3.0V) and Li-ion (2.7V–4.2V) |
Pinout & Package
MAX9028EBT-T uses a 6-bump UCSP (Ultra Compact Silicon Package) measuring 1.0mm × 1.52mm, with bumps on the bottom and no leads. The package is RoHS-compliant and rated for reflow at +235°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply voltage | Accepts +1.8V to +5.5V; powers internal circuitry and defines high-side reference for output pull-up |
| VEE | Negative supply voltage | Typically GND (0V); output can be pulled up to 5.5V above VEE - enabling mixed-voltage I/O |
| IN+ | Noninverting input | Accepts signals from VEE − 0.2V to VCC + 0.2V; used for threshold comparison against IN− |
| IN− | Inverting input | Accepts same rail-to-rail-plus-200mV range; commonly connected to sensor or reference voltage |
| OUT | Open-drain output | Sinks current only; requires external pull-up resistor to define logic-high level and voltage domain |
| - | No connection (B2 bump) | Unused terminal; electrically isolated - not bonded or connected internally |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ inputs | Enables direct sensing at ground or supply rail without external biasing or clamping diodes |
| 0.6µA supply current at 1.8V | Extends battery life in always-on monitoring applications - e.g., >320 years on 2000mAh cell |
| Internal 4mV hysteresis | Eliminates need for external feedback resistors in most low-speed sensing applications |
| Open-drain output with 5.5V tolerance | Supports level translation between disparate voltage domains (e.g., 5V MCU to 3.3V FPGA) |
| Crowbar-current-free switching | Prevents supply-line transients during output transitions - reduces need for bulk bypass capacitors |
Applications
| 2-Cell Battery Monitoring | Ultra-Low-Power Telemetry |
|---|---|
Use Scenario: Monitoring voltage decay of two-series alkaline cells in a remote sensor node. IC Role / Device Role / Timing Role: Comparator compares cell voltage against fixed threshold to trigger low-battery alert. Use Value: 0.6µA quiescent current ensures >30-year battery life at 10-second wake-up intervals. |
Use Scenario: Wake-up trigger for LoRaWAN end-node based on ambient light or temperature threshold crossing. IC Role / Device Role / Timing Role: Detects slow-rising analog sensor output and asserts interrupt to microcontroller. Use Value: 4mV internal hysteresis prevents false triggers from sensor noise without adding external components. |
| Logic-Level Translation | Medical Instrument Sensing |
Use Scenario: Interfacing 5V legacy sensor output to 1.8V/3.3V microcontroller GPIO. IC Role / Device Role / Timing Role: Open-drain output pulled to 3.3V enables safe 5V-to-3.3V signal conversion. Use Value: Output tolerates 5.5V above VEE - eliminates risk of overvoltage damage to downstream logic. |
Use Scenario: Zero-crossing detection in portable ECG front-end to synchronize sampling. IC Role / Device Role / Timing Role: Compares amplified bio-signal against ground reference to generate timing edge. Use Value: Rail-to-rail input range (−0.2V to VCC+0.2V) accepts bipolar signals without DC biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower open-drain comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3691IDCKR | 0.55µA supply current, 1.8V–5.5V, open-drain, but no Beyond-the-Rails inputs (CMVR = 0.2V below VCC only) | Limited to single-supply sensing above ground; cannot monitor VEE-referenced signals directly | Choose TLV3691IDCKR only when input common-mode stays ≥0.2V above VEE and ultra-tight current budget dominates |
| MAX40005XK+T | 0.9µA supply current, push-pull output, rail-to-rail inputs, but no open-drain option or 5.5V output tolerance | Requires level-shifter for mixed-voltage interfaces; unsuitable for wired-AND bus configurations | Choose MAX40005XK+T when fast push-pull drive (±5mA) and lowest propagation delay (1.5µs) are required over voltage flexibility |
Compared with TLV3691IDCKR and MAX40005XK+T, MAX9028EBT-T uniquely combines sub-1µA current, true Beyond-the-Rails inputs, and 5.5V-tolerant open-drain output - making it the only choice for battery-powered systems requiring ground-referenced sensing and multi-voltage I/O interoperability.
Availability
MAX9028EBT-T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power telemetry, and logic-level translation applications requiring stable component supply across extended product lifecycles.
Supply support for MAX9028EBT-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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and portable electronics.
The MAX9025–MAX9028 family was engineered specifically for nanopower, rail-to-rail-plus sensing in battery-constrained systems - prioritizing ultra-low ICC, wide input range, and glitch-free switching over speed or drive strength.
FAQ
What is the maximum output voltage the MAX9028EBT-T can tolerate on its OUT pin?
The MAX9028EBT-T open-drain output is rated for voltages up to 5.5V above VEE. When VEE = 0V (GND), the OUT pin safely sinks current with a pull-up to +5.5V. This enables robust interfacing with higher-voltage logic domains without external protection components - a key advantage over standard comparators limited to VCC-referenced outputs.
Does the MAX9028EBT-T include an internal voltage reference?
No, the MAX9028EBT-T does not include an internal voltage reference. It belongs to the "without reference" variant of the MAX9025–MAX9028 family. Unlike MAX9025/MAX9026 (which integrate a 1.236V ±1% reference), MAX9028EBT-T requires an external reference or resistor-divider network on IN+ or IN− to establish the comparison threshold.
What is the guaranteed operating temperature range for the MAX9028EBT-T?
The MAX9028EBT-T is specified for continuous operation from −40°C to +85°C. All electrical characteristics - including supply current (≤1.25µA), input offset voltage (≤10mV), and propagation delay (tPD− ≤16µs at 1.8V) - are guaranteed across this full industrial temperature range, ensuring reliability in outdoor, automotive cabin, and medical portable environments.
Can the MAX9028EBT-T be used to detect signals below ground (negative voltages)?
Yes, the MAX9028EBT-T supports input voltages down to VEE − 0.2V. With VEE tied to GND (0V), it accepts inputs as low as −0.2V - sufficient for zero-crossing detection of small-amplitude AC-coupled bio-signals or thermocouple outputs. For deeper negative swings, VEE must be biased below ground, and absolute maximum ratings (−0.3V on inputs) must be observed.
How does the MAX9028EBT-T minimize supply-line interference during output transitions?
The MAX9028EBT-T employs a crowbar-current-free break-before-make output stage that limits supply-current surges during switching. Unlike conventional comparators that draw large transient currents, MAX9028EBT-T exhibits only minimal increase in ICC during transitions - reducing supply glitches, easing filtering requirements, and extending battery life in dynamically switching systems.
MAX9028EBT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 6-WFBGA, WLBGA
- Series:
- Beyond-the-Rails™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 5.5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.001µA @ 5V
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 1.25µA
- Current - Quiescent (Max):
- 50.45dB CMRR, 60dB PSRR
- CMRR, PSRR (Typ):
- 45µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 6-WLP
MAX9028EBT-T FAQ
1.How can I place an order for MAX9028EBT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9028EBT-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 MAX9028EBT-T reliable?
The price and inventory of MAX9028EBT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9028EBT-T is usually 5 days.
3.What payment methods are accepted for MAX9028EBT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9028EBT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9028EBT-T?
MAX9028EBT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9028EBT-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 MAX9028EBT-T?
For technical support, including MAX9028EBT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9028EBT-T requirements.
6.How does Aetrix verify that MAX9028EBT-T is sourced from the original manufacturer or authorized distributors?
All MAX9028EBT-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 MAX9028EBT-T meets industry standards.
7.What is the process for return or replacement of MAX9028EBT-T?
All MAX9028EBT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9028EBT-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 MAX9028EBT-T part is unused and in its original packaging.
Return procedure for MAX9028EBT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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