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Analog Devices Inc./Maxim Integrated MAX9022ASA+T
- Part No.:
- MAX9022ASA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9022ASA+T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,229
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Product details
Overview
MAX9022ASA+T from Analog Devices is a dual micropower comparator optimized for single-supply battery-powered systems, featuring 2.8μA supply current per comparator, 3μs propagation delay, 4mV internal hysteresis, rail-to-rail output swing, and operation from 2.5V to 5.5V over -40°C to +125°C - used in photodiode preamplifier threshold detection and mobile communications line receivers.
For engineers reviewing the MAX9022ASA+T datasheet, MAX9022ASA+T pinout, MAX9022ASA+T application, or MAX9022ASA+T equivalent, this page delivers verified electrical parameters, SO-8 package layout, real-world use cases in sensor-signal detection and keyless entry systems, and validated alternative comparators with documented functional trade-offs.
Technical Context
The MAX9022ASA+T integrates two independent comparators sharing a common VDD and VSS supply, each with input common-mode range extending from VSS to VDD − 1.1V and no phase reversal under overdriven inputs. Its internal 4mV hysteresis is fixed and non-adjustable, eliminating external feedback components for noise immunity.
Output stage design minimizes switching current transients, preventing power-supply glitches during transitions. Propagation delay remains stable across capacitive loads up to 150pF and input overdrive voltages from 10mV to 100mV, with typical tpd of 3μs at VOD = 100mV and RL = 10kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V single supply - enables direct integration into Li-ion (3.0–4.2V) and 3.3V logic systems without level-shifting. |
| Supply Current per Comparator | 2.8μA typical - supports >10-year battery life in always-on sensor nodes drawing <6μA total quiescent current. |
| Propagation Delay | 3μs typical at 100mV overdrive - sufficient for kHz-range signal discrimination in digital line receivers and threshold detectors. |
| Hysteresis | 4mV built-in - suppresses chatter on slow-moving inputs (e.g., thermistor outputs or photodiode DC levels) without external resistors. |
| Input Offset Voltage | ±8mV max - sets minimum detectable differential voltage; combined with hysteresis, defines effective decision window. |
| Common-Mode Input Range | VSS to VDD − 1.1V - allows direct sensing of signals referenced to ground in 2.5V–5.5V systems, e.g., battery voltage monitoring. |
| Rail-to-Rail Output Swing | VOL ≤ 400mV at 4mA sink, VOH ≥ VDD − 400mV at 4mA source - ensures TTL/CMOS-compatible logic levels into standard digital inputs. |
Pinout & Package
MAX9022ASA+T is housed in an 8-pin SO (Small Outline) package (package code S8+2), RoHS-compliant, with 1.27mm lead pitch and standard JEDEC MO-001AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-drain or push-pull output - drives logic inputs or LED indicators directly; requires external pull-up for open-drain mode. |
| 2 | INA− | Comparator A inverting input - accepts reference or feedback signal; high impedance (>100GΩ) minimizes loading on precision sources. |
| 3 | INA+ | Comparator A noninverting input - connects to sensor signal path; common-mode range supports ground-referenced inputs down to VSS. |
| 4 | VSS | Negative supply terminal - must be connected to system ground or negative rail; shared by both comparators. |
| 5 | VDD | Positive supply terminal - bypass with 0.1μF ceramic capacitor to VSS for stable operation under dynamic load switching. |
| 6 | INB+ | Comparator B noninverting input - electrically isolated from INA+; enables dual-threshold or window-comparator configurations. |
| 7 | INB− | Comparator B inverting input - paired with INB+ for second independent comparison channel. |
| 8 | OUTB | Comparator B output - independent of OUTA; supports asynchronous event detection (e.g., low- and high-threshold triggers). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 2.8μA per comparator enables multi-year operation on coin-cell batteries in portable medical sensors and IoT endpoints. |
| Internal 4mV hysteresis | Eliminates need for external positive-feedback resistors, reducing BOM count and PCB area in space-constrained designs. |
| Rail-to-rail output | Delivers full logic swing into 4mA loads, interfacing directly with microcontroller GPIOs or FPGA I/O banks without level translators. |
| No phase reversal | Guarantees correct output polarity even when inputs exceed common-mode range - critical for overvoltage-tolerant sensor interfaces. |
| Wide temperature range | -40°C to +125°C operation supports automotive cabin modules, industrial motor controllers, and outdoor environmental monitors. |
Applications
| Battery Voltage Monitor | Photodiode Signal Threshold Detector |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging to trigger low-battery alerts or cutoff. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel for undervoltage lockout (UVLO), one for overvoltage protection (OVP). Use Value: 2.8μA quiescent current extends battery runtime; 4mV hysteresis prevents false triggering near threshold edges. |
Use Scenario: Converting analog photocurrent from ambient light or pulse oximetry sensors into clean digital pulses. IC Role / Device Role / Timing Role: Single comparator channel detecting when photodiode output crosses preset illumination threshold. Use Value: Rail-to-rail output drives MCU interrupt pin directly; 3μs delay supports >100kHz modulation frequencies in optical comms. |
| Digital Line Receiver | Keyless Entry RF Signal Discriminator |
|
Use Scenario: Recovering NRZ data from attenuated, noisy baseband signals in RS-232 or proprietary serial links. IC Role / Device Role / Timing Role: Comparator acting as adaptive threshold receiver - reference set via resistor divider, hysteresis rejects EMI-induced jitter. Use Value: Input common-mode range to VDD − 1.1V allows direct connection to 3.3V data lines; low IDD preserves host system power budget. |
Use Scenario: Detecting valid amplitude-modulated RF envelope bursts from car key fobs in access control receivers. IC Role / Device Role / Timing Role: Envelope detector front-end - comparator thresholds set to reject noise while capturing legitimate 315/433MHz ASK packets. Use Value: 4mV hysteresis provides consistent decision margin against burst-length-dependent baseline drift; SO-8 package suits compact RF module layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3692IDR | Lower supply current (350nA), slower propagation delay (12μs), no internal hysteresis - requires external feedback network. | Better for ultra-low-power wake-up circuits where speed is secondary; unsuitable for noisy environments without added components. | Select TLV3692IDR only when sub-μA quiescent current dominates design priorities and board space allows hysteresis resistors. |
| LMV393QDRQ1 | Higher supply current (20μA), faster propagation delay (300ns), rail-to-rail input, no internal hysteresis - automotive-grade (-40°C to +125°C). | Preferred for automotive body electronics needing fast response and AEC-Q100 qualification; lacks integrated hysteresis for noise-prone domains. | Choose LMV393QDRQ1 for automotive applications requiring qualification and speed, but plan external hysteresis if signal integrity is compromised. |
Compared with TLV3692IDR and LMV393QDRQ1, MAX9022ASA+T uniquely balances ultra-low power (2.8μA), usable speed (3μs), and built-in 4mV hysteresis - making it optimal for cost-sensitive, space-constrained portable systems where noise immunity and minimal external components are critical.
Availability
MAX9022ASA+T is available at Aetrix Electronics and suitable for battery-powered portable systems, photodiode signal detection, and digital line receiver designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX9022ASA+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 since 1965.
The MAX902x family was designed specifically for micropower, single-supply portable applications - delivering precision threshold detection with minimal external components and guaranteed operation across harsh automotive and industrial temperature ranges.
FAQ
What is the maximum capacitive load the MAX9022ASA+T output can drive without oscillation?
The MAX9022ASA+T output is stable with capacitive loads up to 150pF, as specified in the Absolute Maximum Ratings table. Driving larger loads may cause sustained oscillations or increased propagation delay; for loads exceeding 150pF, a series resistor (e.g., 50Ω) should isolate the output from the capacitance. This limit applies to both OUTA and OUTB pins under all operating conditions from -40°C to +125°C.
Does the MAX9022ASA+T support dual-supply operation, and what are the voltage limits?
Yes, the MAX9022ASA+T supports dual-supply operation with ±1.25V to ±2.75V rails (i.e., total supply span of 2.5V to 5.5V). The absolute maximum ratings specify VDD to VSS must not exceed 6V, and input voltages must stay within -0.3V to (VDD + 0.3V) relative to VSS. This configuration is commonly used in legacy analog systems requiring bipolar signal handling.
Can the internal hysteresis of the MAX9022ASA+T be disabled or adjusted?
No, the 4mV internal hysteresis in the MAX9022ASA+T is fixed and cannot be disabled or trimmed. It is implemented at the silicon level and active in all operating modes. If adjustable hysteresis is required, external positive feedback using resistors between output and inverting input must be added - but doing so overrides the internal hysteresis and introduces design dependencies on output swing and loading.
What is the input bias current specification for the MAX9022ASA+T, and how does it affect high-impedance sensor interfaces?
The MAX9022ASA+T has a maximum input bias current of 80nA (typical 3nA), measured at room temperature. When interfacing with high-impedance sources like photodiodes or pH electrodes, this bias current introduces offset errors - for example, a 10MΩ source impedance yields up to 800μV error. Layout best practices (guard traces, low-leakage PCB materials) and calibration are recommended for sub-mV accuracy requirements.
Is the MAX9022ASA+T pin-compatible with other packages in the MAX9022 family, such as the SOT23-8 or μMAX versions?
No, the MAX9022ASA+T (SO-8) is not pin-compatible with MAX9022AKA+T (SOT23-8) or MAX9022AUA+T (μMAX). Although all share identical electrical functionality and pin functions, their physical pinouts differ: SO-8 uses standard 1–8 linear numbering, while SOT23-8 and μMAX follow different top-view layouts. PCB redesign is required when substituting between these packages.
MAX9022ASA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- CMOS, Rail-to-Rail, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 5.5V, ±1.25V ~ 2.75V
- :
- 1mV @ 5V
- Voltage - Input Offset (Max):
- 0.003µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 5µA
- Current - Quiescent (Max):
- 100dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 8µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX9022ASA+T FAQ
1.How can I place an order for MAX9022ASA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9022ASA+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 MAX9022ASA+T reliable?
The price and inventory of MAX9022ASA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9022ASA+T is usually 5 days.
3.What payment methods are accepted for MAX9022ASA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9022ASA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9022ASA+T?
MAX9022ASA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9022ASA+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 MAX9022ASA+T?
For technical support, including MAX9022ASA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9022ASA+T requirements.
6.How does Aetrix verify that MAX9022ASA+T is sourced from the original manufacturer or authorized distributors?
All MAX9022ASA+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 MAX9022ASA+T meets industry standards.
7.What is the process for return or replacement of MAX9022ASA+T?
All MAX9022ASA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9022ASA+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 MAX9022ASA+T part is unused and in its original packaging.
Return procedure for MAX9022ASA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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