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Analog Devices Inc./Maxim Integrated MAX922CSA+T
- Part No.:
- MAX922CSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX922CSA+T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,063
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Product details
Overview
The MAX922CSA+T from Maxim Integrated is a dual ultra-low-power voltage comparator with no internal reference and no internal hysteresis, housed in an 8-pin SO package. It operates from a single +2.5V to +11V supply (or ±1.25V to ±5.5V dual supply), draws ≤4μA quiescent current over temperature, supports rail-to-rail input common-mode range (V− to V+ − 1.3V), and delivers TTL/CMOS-compatible outputs that both sink and source current - ideal for battery-powered threshold detection in portable instrumentation.
For engineers reviewing the MAX922CSA+T datasheet, MAX922CSA+T pinout, MAX922CSA+T application, or MAX922CSA+T equivalent, key selection criteria include its dual-comparator architecture without integrated reference, output swing from V+ to V− (requiring V− connection to GND for TTL compatibility), 12μs propagation delay at 10mV overdrive, and suitability for window detectors, oscillator circuits, and low-quiescent-power sensing where external reference and hysteresis are independently managed.
Technical Context
The MAX922CSA+T implements two independent micropower comparators with a unique output stage capable of continuous 40mA sourcing and >5mA sinking while maintaining sub-4μA supply current. Its input stage accepts signals from V− up to V+ − 1.3V, enabling operation near supply rails without phase reversal.
No internal voltage reference or hysteresis is included - unlike MAX921/MAX923 - so external reference and positive-feedback hysteresis networks must be implemented per application. Output logic transitions generate no crowbar current, minimizing supply-line parasitic feedback and improving layout tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply; ±1.25V to ±5.5V dual supply - supports both battery-powered and bipolar-signal systems |
| Quiescent Supply Current | ≤4μA over extended temperature (−40°C to +85°C) - enables multi-year operation on coin cells |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows direct sensing of signals referenced to negative rail or ground |
| Propagation Delay | 12μs at 10mV overdrive (100pF load) - suitable for medium-speed level detection and oscillator timing |
| Output Drive Capability | Sources ≥40mA continuously; sinks ≥5mA - drives LEDs, MOSFET gates, or logic inputs directly without buffers |
| Input Offset Voltage | ±10mV max - sets minimum detectable differential voltage in precision threshold applications |
| Input Leakage Current | ±0.01nA to ±5nA (C/E temp ranges) - preserves accuracy in high-impedance sensor interfaces |
Pinout & Package
Package: 8-pin SO (Small Outline), 150 mil width, surface-mount - compatible with standard PCB assembly and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output; swings rail-to-rail between V+ and V−; sinks/sources current |
| 2 | V+ | Positive supply input; accepts +2.5V to +11V (single) or +1.25V to +5.5V (dual) |
| 3 | INB+ | Noninverting input of comparator B; supports common-mode range to V+ − 1.3V |
| 4 | INB− | Inverting input of comparator B; matched offset and leakage with INB+ |
| 5 | INA− | Inverting input of comparator A; electrically identical to INB− |
| 6 | INA+ | Noninverting input of comparator A; matched offset and leakage with INA− |
| 7 | V− | Negative supply input; connect to GND for single-supply TTL operation |
| 8 | OUTA | Comparator A output; functionally identical to OUTB; independent of OUTB |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables simultaneous monitoring of two thresholds (e.g., under/overvoltage) in one IC |
| Rail-to-rail input range | Accepts inputs down to V− and up to V+ − 1.3V - eliminates need for level-shifting in many sensor interfaces |
| No crowbar output switching | Prevents supply-line glitches during state transitions - improves system stability without added bypassing |
| 40mA continuous output source | Drives LEDs, small relays, or MOSFET gates directly - reduces bill-of-materials count |
| Ultra-low 4μA supply current | Extends battery life in always-on monitoring systems - critical for IoT edge nodes and portable medical devices |
Applications
| Battery-Powered Threshold Detector | Window Comparator System |
|---|---|
Use Scenario: Monitoring lithium-ion cell voltage to trigger low-battery warning and prevent deep discharge in handheld devices. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against upper (4.2V) and lower (3.0V) thresholds using external resistor dividers and reference. Use Value: Enables precise, low-power undervoltage/overvoltage protection with <4μA quiescent draw - extends standby time by months. | Use Scenario: Validating regulated 5V supply integrity in industrial controllers by detecting deviations outside 4.75V–5.25V window. IC Role / Device Role / Timing Role: One comparator monitors upper limit, the other lower limit; outputs feed AND gate to generate "power-good" signal. Use Value: Eliminates need for separate reference IC and discrete hysteresis components - reduces footprint and component count. |
| Oscillator Circuit | Level-Shifting Interface |
Use Scenario: Building relaxation oscillator for clock generation in ultra-low-power sensor nodes. IC Role / Device Role / Timing Role: Comparator charges/discharges external capacitor via feedback network; output toggles at frequency set by RC time constant. Use Value: Achieves stable oscillation with <4μA supply current - outperforms op-amp-based oscillators in energy-constrained designs. | Use Scenario: Converting ±5V analog sensor outputs to 0–5V TTL logic levels for microcontroller ADC input. IC Role / Device Role / Timing Role: Comparator compares bipolar input against 0V reference; output swings 0V/5V with rail-to-rail drive strength. Use Value: Provides robust, glitch-free level translation without external pull-ups or level-shifters - simplifies interface design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | No internal hysteresis; 20μA typical supply current; open-collector outputs require pull-up resistors | Lacks rail-to-rail input capability and continuous 40mA sourcing - unsuitable for direct LED driving or low-voltage rail sensing | Select when cost sensitivity outweighs quiescent current and output drive requirements |
| TLV3702IDR | Includes rail-to-rail input/output; 1.6μA supply current; built-in ESD protection; but no dual-supply operation support | Optimized for single-supply 1.8–5.5V systems only - cannot replace MAX922CSA+T in ±5V bipolar applications | Choose for modern low-voltage battery systems where dual-supply operation is unnecessary |
Compared with LM393DR and TLV3702IDR, the MAX922CSA+T uniquely combines dual-supply flexibility, 40mA sourcing, and sub-4μA quiescent current - making it irreplaceable in legacy industrial sensors and long-life portable equipment requiring robust bipolar signal handling.
Availability
MAX922CSA+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and oscillator circuits requiring stable component supply across commercial temperature range (0°C to +70°C).
Supply support for MAX922CSA+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 communications markets.
The MAX921–MAX924 family was engineered specifically for ultra-low-power, single/dual-supply comparator applications where micropower operation, rail-to-rail input, and robust output drive are simultaneously required - targeting portable instrumentation and energy-harvesting systems.
FAQ
What is the operating temperature range for the MAX922CSA+T?
The MAX922CSA+T is specified for the commercial temperature range of 0°C to +70°C. This is confirmed by the ordering information table, where "CSA" denotes the 8-pin SO package with 0°C to +70°C rating. It is not rated for extended (−40°C to +85°C) or military (−55°C to +125°C) temperature operation.
Does the MAX922CSA+T include an internal voltage reference?
No, the MAX922CSA+T does not include an internal voltage reference. Unlike the MAX921 and MAX923, the MAX922 variant explicitly omits the REF pin and internal 1.182V bandgap reference - as confirmed in the "Ordering Information" table and functional descriptions. External reference circuitry must be provided for threshold-setting applications.
Can the MAX922CSA+T be used with a single +5V supply?
Yes, the MAX922CSA+T operates from a single +5V supply. Connect V− pin to ground, and configure inputs within the common-mode range (0V to +3.7V). Outputs swing from V+ (+5V) to V− (0V), delivering TTL/CMOS-compatible logic levels without external pull-ups - verified in the "Power Supplies" feature list and Typical Operating Circuit.
What is the maximum continuous output source current of the MAX922CSA+T?
The MAX922CSA+T provides continuous output source current of at least 40mA per comparator output (OUTA or OUTB), as stated in the General Description and confirmed in the "Typical Operating Characteristics" section. This capability enables direct driving of LEDs, small solenoids, or logic inputs without external buffers.
How does hysteresis work on the MAX922CSA+T?
The MAX922CSA+T has no internal hysteresis or HYST pin. Hysteresis must be implemented externally using positive feedback - for example, connecting a resistor from OUTA to INA+ to raise the trip point on rising input and lower it on falling input. The datasheet provides explicit design equations and example values for R1/R2 in the "Hysteresis (MAX922/MAX924)" section.
MAX922CSA+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, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 11V, ±1.25V ~ 5.5V
- :
- 10mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 5µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX922CSA+T FAQ
1.How can I place an order for MAX922CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX922CSA+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 MAX922CSA+T reliable?
The price and inventory of MAX922CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX922CSA+T is usually 5 days.
3.What payment methods are accepted for MAX922CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX922CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX922CSA+T?
MAX922CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX922CSA+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 MAX922CSA+T?
For technical support, including MAX922CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX922CSA+T requirements.
6.How does Aetrix verify that MAX922CSA+T is sourced from the original manufacturer or authorized distributors?
All MAX922CSA+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 MAX922CSA+T meets industry standards.
7.What is the process for return or replacement of MAX922CSA+T?
All MAX922CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX922CSA+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 MAX922CSA+T part is unused and in its original packaging.
Return procedure for MAX922CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX922CSA+T Tags
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LM2903DR
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LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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