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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:1,784
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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 source/sink 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, SO-8 thermal performance (471mW at +70°C), 12μs propagation delay at 10mV overdrive, output swing from V+ to V−, and compatibility with external hysteresis networks using positive feedback.
Technical Context
The MAX922CSA-T implements two independent micropower comparators with a unique output stage that continuously sources up to 40mA while eliminating crowbar current during transitions - minimizing parasitic supply feedback and improving layout robustness. Its input stage accepts voltages from V− to (V+ −1.3V), enabling direct sensing near ground or negative rails in single- or dual-supply configurations.
No internal voltage reference or hysteresis circuitry is included, distinguishing it from the MAX921/MAX923. Hysteresis must be implemented externally via resistor networks on the IN+ pins, as documented in Figure 4 of the datasheet, with design guidance provided for R1/R2/R3 selection based on desired VHB and trip thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply or ±1.25V to ±5.5V dual supply - supports wide-input industrial and battery systems |
| Quiescent Current | ≤4μA over extended temperature (−40°C to +85°C) - enables multi-year operation on coin cells |
| Propagation Delay | 12μs at 10mV overdrive - suitable for medium-speed level detection with predictable timing |
| Input Common-Mode Range | V− to (V+ −1.3V) - allows direct interface to sensors referenced to V− or ground |
| Output Drive Capability | Sources ≥40mA continuously; sinks ≥5mA - drives LEDs, logic inputs, or small relays without external 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
MAX922CSA-T uses an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint, 1.27mm pitch, and 4.9mm × 3.9mm body size. Thermal derating is 5.88mW/°C above +70°C (471mW max at TA = +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output; sinks/sources current; swings rail-to-rail between V+ and V− |
| 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− |
| 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; used with external resistors for hysteresis |
| 7 | V− | Negative supply input; connect to GND for single-supply operation |
| 8 | OUTA | Comparator A output; identical drive capability and swing to OUTB |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Operates with inputs from V− to (V+ −1.3V), enabling direct sensing in low-voltage or bipolar systems |
| No crowbar output switching | Eliminates supply-line glitches during output transitions, reducing need for aggressive bypassing |
| 40mA continuous source current | Drives LEDs, MOSFET gates, or logic loads directly - avoids external driver stages |
| Ultra-low 4μA supply current | Enables >10-year battery life in always-on monitoring nodes with 200mAh coin cells |
| 12μs propagation delay (10mV overdrive) | Predictable response time supports deterministic timing in window detectors and oscillator circuits |
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 medical devices. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against upper (4.2V) and lower (3.0V) thresholds using resistor dividers and external hysteresis. Use Value: 4μA quiescent current extends operational life; rail-to-rail inputs accommodate full 2.5V–4.3V cell range without level shifting. | Use Scenario: Detecting out-of-spec AC adapter output in embedded power supplies to assert "power good" or fault signals. IC Role / Device Role / Timing Role: One comparator monitors undervoltage (e.g., <4.75V), the other overvoltage (e.g., >5.25V); outputs ANDed to generate clean enable signal. Use Value: Independent comparator channels allow separate hysteresis tuning per threshold; 40mA drive directly powers optocoupler LED or logic gate. |
| Oscillator Circuit | Level-Shifting Interface |
Use Scenario: Building relaxation oscillator for low-frequency clock generation in energy-harvesting sensor nodes. IC Role / Device Role / Timing Role: Comparator A forms hysteresis-based Schmitt trigger with RC network; comparator B unused or repurposed. Use Value: Predictable 12μs delay and stable propagation characteristics ensure repeatable frequency; no reference required simplifies BOM. | Use Scenario: Converting ±5V analog sensor outputs (e.g., strain gauge bridge) to 0V/5V logic levels for microcontroller ADC monitoring. IC Role / Device Role / Timing Role: Comparator A compares bipolar input against 0V reference; comparator B provides redundant channel or status flag. Use Value: Input common-mode range includes V− enables direct connection to −5V rail; TTL/CMOS output eliminates level-shifter IC. |
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 reference; 1.0mV typical offset; 500μA supply current; open-collector outputs only | Requires pull-up resistors; higher power limits use in ultra-low-power designs; no sourcing capability | Select when cost sensitivity outweighs quiescent current and output drive requirements |
| TLV3702IDR | Includes rail-to-rail I/O; 1.8V to 16V supply; 850nA supply current; push-pull outputs; no reference | Lower power than MAX922CSA-T but limited sourcing (<10mA); optimized for 1.8V–5V systems | Prefer for modern low-voltage mixed-signal systems where 40mA sourcing is unnecessary |
Compared with LM393DR and TLV3702IDR, the MAX922CSA-T uniquely combines sub-4μA quiescent current, 40mA sourcing capability, and rail-to-rail input operation - making it irreplaceable in long-life battery systems requiring direct load driving without external components.
Availability
MAX922CSA-T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and window comparators requiring stable component supply across commercial temperature range (0°C to +70°C) and SO-8 packaging.
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 inputs, and robust output drive are critical - especially in portable and remote sensing systems.
FAQ
Does the MAX922CSA-T include an internal voltage reference?
No, the MAX922CSA-T does not include an internal voltage reference. Unlike the MAX921 or MAX923, it is designed as a reference-free dual comparator. Users must supply an external reference voltage to the IN+ or IN− pins when implementing threshold detection. This simplifies the die and reduces quiescent current, aligning with its ultra-low-power target application profile.
What is the maximum continuous output source current of the MAX922CSA-T?
The MAX922CSA-T continuously sources up to 40mA per output (OUTA or OUTB) across its operating temperature range. This is confirmed in the "Comparator Output" section of the datasheet and enables direct driving of LEDs, small solenoids, or logic inputs without external buffers - a key differentiator versus standard comparators like the LM393.
Can the MAX922CSA-T operate from a single 3V supply?
Yes, the MAX922CSA-T operates from a single +2.5V to +11V supply, so 3V is fully supported. At 3V, it maintains ≤4μA quiescent current and retains rail-to-rail input capability (V− to V+ −1.3V = 0V to 1.7V). Propagation delay increases slightly to 14μs (10mV overdrive), as specified in the 3V Electrical Characteristics table.
How is hysteresis implemented on the MAX922CSA-T?
Hysteresis on the MAX922CSA-T requires external positive feedback using resistors R1, R2, and R3 as shown in Figure 4 of the datasheet. Since the device lacks a HYST pin, hysteresis is added by connecting R1 between OUTA and IN+ of comparator A, and R2 between IN+ and a reference voltage. The same method applies independently to comparator B.
What is the input common-mode voltage range for the MAX922CSA-T?
The input common-mode voltage range for the MAX922CSA-T is from V− to (V+ −1.3V). For example, with V+ = 5V and V− = 0V (single supply), inputs may range from 0V to 3.7V. With V+ = 5V and V− = −5V (dual supply), the range is −5V to +3.7V - enabling direct interface to bipolar sensor outputs without level shifting.
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:
- Obsolete
- 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
-
LM2903DR
Texas Instruments
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LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
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LM2901PWR
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
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LM239DR
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LM339APWR
Texas Instruments
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LM2903P
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LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP USA Inc.
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