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Analog Devices Inc./Maxim Integrated MAX9022ASA
- Part No.:
- MAX9022ASA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9022ASA.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,247
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Product details
Overview
MAX9022ASA from Analog Devices is a dual micropower comparator optimized for battery-powered portable systems, featuring 2.8μA supply current per comparator, 3μs propagation delay, and 4mV internal hysteresis across -40°C to +125°C. It operates from a single 2.5V–5.5V supply, supports rail-to-rail output swing, and delivers noise-immune threshold detection in space-constrained sensor-signal and photodiode preamp circuits.
For engineers reviewing the MAX9022ASA datasheet, MAX9022ASA pinout, MAX9022ASA application, or MAX9022ASA equivalent, this page provides verified functional specifications, SO-8 package layout details, real-world use cases in keyless entry and digital line reception, and two validated alternative comparators with documented parameter trade-offs.
Technical Context
The MAX9022ASA integrates two independent comparators sharing a common VDD and VSS, 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 basic noise immunity.
Output stage design minimizes switching current transients, preventing power-supply glitches during transitions. Propagation delay remains stable at 3μs (typ) with 100mV overdrive and RL = 10kΩ/CL = 15pF, while rise/fall times are 20ns - enabling reliable operation up to ~10kHz signal edges without oscillation.
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 (typ) at +25°C - supports >10-year battery life in always-on threshold detectors with 10μA total system budget. |
| Propagation Delay | 3μs (typ) at VOD = 100mV - sufficient for detecting slow sensor thresholds (e.g., temperature ramps, pressure drift) without timing jitter. |
| Hysteresis | 4mV (fixed, internal) - suppresses chatter on signals with <10mV pk-pk noise, eliminating need for external resistor network. |
| Input Offset Voltage | ±1mV (typ), ±8mV (max) - ensures accurate trip-point setting within ±4mV window when combined with hysteresis band. |
| Rail-to-Rail Output Swing | VOL ≤ 2mV @ 10μA sink; VOH ≥ VDD − 2mV @ 10μA source - interfaces directly with CMOS logic inputs without pull-ups or level translators. |
| Common-Mode Input Range | VSS to VDD − 1.1V - accepts ground-referenced inputs in single-supply systems, e.g., photodiode current-to-voltage outputs. |
Pinout & Package
MAX9022ASA is housed in an 8-pin SO (Small Outline) package (SOIC-8), 3.9mm × 4.9mm body, 1.27mm pitch, RoHS-compliant with + suffix. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-drain or push-pull output - sinks or sources current depending on internal architecture; rail-to-rail swing confirmed. |
| 2 | INA− | Comparator A inverting input - accepts signals down to VSS; differential input voltage limited to ±6.6V. |
| 3 | INA+ | Comparator A noninverting input - common-mode range extends to VDD − 1.1V; input bias current ≤ 80nA (max). |
| 4 | VSS | Negative supply terminal - must be connected to system ground or negative rail; serves as reference for all inputs and outputs. |
| 5 | VDD | Positive supply terminal - bypass with 0.1μF ceramic capacitor to VSS close to pin; PSRR ≥ 60dB over 2.5–5.5V range. |
| 6 | INB+ | Comparator B noninverting input - electrically identical to INA+; supports independent dual-threshold configurations. |
| 7 | INB− | Comparator B inverting input - matches INA− specs; allows differential sensing of two independent analog channels. |
| 8 | OUTB | Comparator B output - fully independent of OUTA; no crosstalk observed in typical operating conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 2.8μA per comparator enables multi-year operation from coin-cell batteries in wireless sensors. |
| Internal 4mV hysteresis | Eliminates external positive-feedback resistors for basic noise immunity, reducing BOM count and PCB area. |
| Rail-to-rail output stage | Drives CMOS logic directly without external pull-up resistors, simplifying interface design in 3.3V/5V mixed-signal systems. |
| No phase reversal on overdrive | Prevents false triggering when input exceeds common-mode range - critical for robust operation in transient-prone environments. |
| Wide single-supply range | 2.5V–5.5V operation supports legacy 5V microcontrollers and modern 3.3V/2.8V SoCs without regulator overhead. |
Applications
| Battery-Powered Portable Systems | Photodiode Preamp Circuits |
|---|---|
|
Use Scenario: Monitoring battery voltage against low-battery cutoff thresholds in handheld medical devices and IoT sensors. IC Role / Device Role / Timing Role: Dual comparator performs simultaneous high- and low-voltage window detection using internal hysteresis for glitch-free flag generation. Use Value: 2.8μA total quiescent current extends shelf life beyond 5 years in storage mode while maintaining accurate 3.0V/3.3V trip points. |
Use Scenario: Converting weak photocurrents from ambient light or pulse oximetry sensors into clean digital pulses. IC Role / Device Role / Timing Role: Comparator A detects rising edge of transimpedance amplifier output; Comparator B provides adjustable hysteresis-based blanking window. Use Value: Input common-mode range to VDD − 1.1V allows direct connection to TIA output without level-shifting, preserving signal integrity. |
| Digital Line Receivers | Keyless Entry Systems |
|
Use Scenario: Recovering degraded RS-232 or proprietary baseband data signals in automotive infotainment head units. IC Role / Device Role / Timing Role: Dual comparator reconstructs logic levels from attenuated/dispersed waveforms using rail-to-rail output swing and fast 3μs response. Use Value: 20ns rise/fall time ensures <5% timing skew on 100kbps signals, meeting UART sampling margin requirements. |
Use Scenario: Detecting RF envelope peaks from 315MHz/433MHz ASK receivers to trigger door unlock sequences. IC Role / Device Role / Timing Role: One comparator monitors envelope amplitude against programmable threshold; second validates pulse width to reject noise bursts. Use Value: 4mV hysteresis rejects ESD-induced transients while maintaining <100ns response to valid key fob pulses. |
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, rail-to-rail input/output. | Better for ultra-low-power wake-up triggers where speed <1kHz; requires external hysteresis resistors for noise immunity. | Select TLV3692IDR only if sub-1μA quiescent current is mandatory and signal edges exceed 10μs rise time. |
| LMV7232MME/NOPB | Higher supply current (55μA), faster propagation delay (220ns), 6.5mV hysteresis, same SO-8 package. | Suitable for higher-speed line reception (>1Mbps) but increases battery load 20× vs. MAX9022ASA. | Choose LMV7232MME/NOPB when 220ns response is required and power budget allows ≥50μA per comparator. |
Compared with TLV3692IDR and LMV7232MME/NOPB, the MAX9022ASA uniquely balances 2.8μA quiescent current, 3μs speed, and built-in 4mV hysteresis in SO-8 - making it optimal for cost-sensitive, long-life portable systems needing moderate speed and robust noise rejection.
Availability
MAX9022ASA is available at Aetrix Electronics and suitable for battery-powered portable systems, photodiode preamp circuits, and keyless entry systems requiring stable component supply across automotive (-40°C to +125°C) and industrial temperature ranges.
Supply support for MAX9022ASA 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 MAX9021/MAX9022/MAX9024 family was designed specifically for ultra-low-power, space-constrained threshold detection in portable and sensor-edge applications - prioritizing micropower operation, small footprint, and integrated noise immunity over raw speed or precision.
FAQ
What is the maximum capacitive load the MAX9022ASA output can drive without oscillation?
The MAX9022ASA is characterized for stable operation with up to 150pF capacitive load, as specified in the Absolute Maximum Ratings table. Driving loads beyond this value may cause sustained oscillations due to phase margin degradation. For loads >100pF, add a series 10Ω–50Ω resistor near the output pin to isolate capacitance and preserve stability - verified in Typical Operating Characteristics Figure toc08/toc09.
Does the MAX9022ASA support dual-supply operation, and what are the voltage limits?
Yes, the MAX9022ASA supports dual-supply operation from ±1.25V to ±2.75V, as stated in the Detailed Description section. This corresponds to total supply span of 2.5V to 5.5V, matching its single-supply range. The input common-mode range remains VSS to VDD − 1.1V regardless of supply configuration, and absolute maximum ratings specify VDD to VSS stress limit of -0.3V to +6V.
Is the 4mV hysteresis in MAX9022ASA adjustable or fixed?
The 4mV hysteresis in MAX9022ASA is fixed and internal - not user-adjustable. It is implemented via on-chip circuitry and cannot be disabled or modified. External hysteresis can be added using positive feedback resistors (as shown in Figure 1 of the datasheet), but doing so overrides the internal hysteresis and requires recalculating trip points based on output swing and resistor ratios.
What is the input bias current specification for MAX9022ASA, and how does it affect high-impedance sensor interfaces?
The MAX9022ASA has a maximum input bias current of 80nA (at +25°C), with typical value of 3nA. At the full -40°C to +125°C range, bias current remains below 100nA. When interfacing with high-impedance sources (e.g., >1MΩ photodiode TIA feedback networks), this introduces <80μV offset error - negligible compared to ±8mV max input offset voltage, confirming suitability for precision sensor front-ends.
Can MAX9022ASA operate reliably at 2.5V supply, and what performance parameters change versus 5V operation?
Yes, MAX9022ASA is fully specified from 2.5V to 5.5V. At 2.5V, supply current remains 2.8μA (typ), propagation delay increases slightly to 3.5μs (vs. 3μs at 5V), and output swing degrades to VOL ≤ 10mV / VOH ≥ 2.48V (at 4mA load). PSRR drops from 80dB to 60dB, but all functions remain guaranteed across temperature per Electrical Characteristics table.
MAX9022ASA 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:
- 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 FAQ
1.How can I place an order for MAX9022ASA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9022ASA 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 reliable?
The price and inventory of MAX9022ASA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9022ASA is usually 5 days.
3.What payment methods are accepted for MAX9022ASA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9022ASA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9022ASA?
MAX9022ASA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9022ASA 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?
For technical support, including MAX9022ASA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9022ASA requirements.
6.How does Aetrix verify that MAX9022ASA is sourced from the original manufacturer or authorized distributors?
All MAX9022ASA 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 meets industry standards.
7.What is the process for return or replacement of MAX9022ASA?
All MAX9022ASA units undergo pre-shipment inspection (PSI). If there is an issue with MAX9022ASA, 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 part is unused and in its original packaging.
Return procedure for MAX9022ASA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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