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Analog Devices Inc./Maxim Integrated MAX942CSA+TG002
- Part No.:
- MAX942CSA+TG002
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
MAX942CSA+TG002.pdf
- Description:
- INTEGRATED CIRCUIT
- Quantity:
- Payment:
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Inventory:2,125
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Product details
Overview
MAX942CSA+TG002 from Maxim Integrated is a dual high-speed comparator optimized for 3V/5V single-supply systems, featuring rail-to-rail inputs, 80ns propagation delay (5mV overdrive), 350μA per comparator supply current, and CMOS/TTL-compatible push-pull outputs. It operates from 2.7V to 5.5V and is used in battery-powered threshold detection and line receiver circuits.
For engineers reviewing the MAX942CSA+TG002 datasheet, MAX942CSA+TG002 pinout, MAX942CSA+TG002 application, or MAX942CSA+TG002 equivalent, key selection criteria include input common-mode range beyond rails (–0.2V to V+ + 0.2V), 1mV typical input offset voltage, internal hysteresis for noise immunity, output swing within 0.4V of rails, and μMAX/SO-8 package compatibility.
Technical Context
The MAX942CSA+TG002 implements a bipolar-input, current-driven output stage with fixed internal hysteresis (≈3mV input-referred width), enabling clean switching without external components. Its rail-to-rail input stage supports common-mode voltages from –0.2V to V+ + 0.2V, and its outputs drive directly into CMOS/TTL logic without pull-ups.
Propagation delay skew between channels is ≤10ns, and differential propagation delay is ≤10ns - critical for matched dual-channel timing in sampling circuits and zero-crossing detectors. The device lacks latch or shutdown functions (exclusive to MAX941), confirming its role as a dedicated dual comparator without control logic overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - supports both 3V and 5V systems with margin for brownout tolerance |
| Propagation Delay | 80ns (typ) at 5mV overdrive - enables >10MHz signal discrimination in fast edge-detection applications |
| Input Offset Voltage | 1mV (typ) at +25°C - ensures accurate threshold setting in precision discriminators |
| Supply Current per Comparator | 350μA (typ) at 3V - enables ultra-low-power operation in always-on battery monitoring |
| Input Common-Mode Range | –0.2V to V+ + 0.2V - allows direct sensing of signals below GND or above V+, e.g., in transducer interfaces |
| Output Voltage Swing | VOH = V+ – 0.2V (min), VOL = 0.4V (max) at 400μA - guarantees TTL/CMOS logic-level compatibility without external biasing |
| Internal Hysteresis | ≈3mV input-referred - suppresses chatter on slow-moving or noisy inputs without external feedback resistors |
Pinout & Package
MAX942CSA+TG002 is housed in an 8-pin SO (SOIC-8) package, with exposed pad for thermal enhancement per Maxim's S8-2 outline (Outline No. 21-0041). Pin 1 is marked by a beveled corner or dot; pin numbering follows standard SOIC convention (counterclockwise from pin 1).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply input (2.7V–5.5V); requires local 0.1μF ceramic decoupling to GND |
| 2 | OUTB | Comparator B open-drain/push-pull output; drives CMOS/TTL loads directly |
| 3 | INB− | Inverting input for comparator B; accepts rail-to-rail common-mode signals |
| 4 | INB+ | Noninverting input for comparator B; matched to INB− for low offset and drift |
| 5 | GND | Analog/digital ground reference; must connect to low-inductance ground plane |
| 6 | INA+ | Noninverting input for comparator A; electrically identical to INB+ |
| 7 | INA− | Inverting input for comparator A; matched to INA+ with <3mV hysteresis zone |
| 8 | OUTA | Comparator A output; fully independent channel with matched timing to OUTB |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Supports input signals from –0.2V to V+ + 0.2V - eliminates level-shifting in sensor front-ends |
| Fixed internal hysteresis | ≈3mV input-referred - removes need for external hysteresis resistors and associated layout complexity |
| Low 350μA/comparator supply current | Enables dual-comparator functionality in energy-constrained IoT nodes with sub-1mA total quiescent draw |
| 80ns propagation delay (5mV overdrive) | Permits reliable detection of 10MHz square waves in clock recovery or pulse-width measurement |
| CMOS/TTL-compatible outputs | Drives 400μA loads while staying within VOH/VOL specs - no external pull-ups required for logic interfacing |
| Robust input fault tolerance | Withstands continuous short-circuit to either rail - protects against miswiring in industrial I/O modules |
Applications
| Battery-Powered Threshold Detector | High-Speed Line Receiver |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charging to trigger cutoff at 4.2V ±10mV. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel for upper threshold, one for lower hysteresis band. Use Value: 1mV offset and 3mV hysteresis ensure precise, chatter-free trip points without calibration; 350μA/quiescent current extends battery life in portable medical devices. |
Use Scenario: Converting noisy RS-422 differential signals to clean single-ended logic for FPGA capture. IC Role / Device Role / Timing Role: Single comparator channel used with resistor network to set receive threshold; second channel monitors signal integrity. Use Value: 80ns delay and 10ns channel-to-channel skew preserve timing margins in 10Mbps serial links; rail-to-rail inputs accommodate common-mode noise up to ±1V. |
| Zero-Crossing Detector for AC Mains | Sampling Circuit Trigger Generator |
Use Scenario: Detecting AC line zero crossings in smart energy meters to synchronize ADC sampling. IC Role / Device Role / Timing Role: Comparator compares isolated AC waveform (via transformer) against GND reference; output drives microcontroller interrupt. Use Value: Input common-mode range extending 0.2V below GND accommodates transformer leakage offsets; internal hysteresis rejects EMI-induced false triggers near zero crossing. |
Use Scenario: Generating precise sample-enable pulses synchronized to analog signal peaks in data acquisition systems. IC Role / Device Role / Timing Role: One comparator detects rising edge of peak-hold voltage; second validates hold stability before triggering ADC conversion. Use Value: Matched propagation delays (<10ns skew) ensure deterministic timing between detection and enable; low 1mV offset minimizes sampling jitter in 12-bit+ systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Slower (1.3μs delay), higher supply current (500μA), no rail-to-rail inputs, no internal hysteresis | Suitable only for DC or low-frequency (<10kHz) threshold detection; requires external hysteresis resistors | Select when cost is primary constraint and speed/power performance is secondary |
| TLV3502IDR | Faster (4.5ns delay), lower supply current (15μA), rail-to-rail inputs/outputs, but no internal hysteresis and narrower supply range (2.7V–5.5V same) | Requires external hysteresis network; better for ultra-high-speed (>100MHz) but less robust in noisy environments | Select when nanosecond response is mandatory and board space allows hysteresis design |
Compared with LM393DR and TLV3502IDR, the MAX942CSA+TG002 uniquely balances 80ns speed, 350μA efficiency, rail-to-rail operation, and built-in hysteresis - making it optimal for mid-speed, noise-prone, battery-sensitive applications where simplicity and reliability outweigh extreme speed or lowest cost.
Availability
MAX942CSA+TG002 is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors/discriminators, and line receivers requiring stable component supply across industrial temperature ranges (0°C to +70°C).
Supply support for MAX942CSA+TG002 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, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX941/MAX942/MAX944 family was engineered specifically for high-speed, low-power, single-supply comparator applications in portable and 3V/5V infrastructure systems - emphasizing rail-to-rail operation, internal hysteresis, and logic-compatible outputs.
FAQ
What is the operating temperature range for MAX942CSA+TG002?
The MAX942CSA+TG002 is specified for 0°C to +70°C ambient operation, as indicated by the 'C' grade suffix in its ordering code. This commercial-grade rating makes it suitable for consumer electronics, office equipment, and non-automotive industrial controls where extended temperature performance is not required. The device uses Maxim's bipolar process and is tested across this full range for all key parameters including propagation delay, offset voltage, and supply current.
Does MAX942CSA+TG002 include shutdown or latch functionality?
No, the MAX942CSA+TG002 does not include shutdown or latch functionality. These features are exclusive to the MAX941 variant (single-channel) and are absent from both MAX942 (dual) and MAX944 (quad) devices. The MAX942CSA+TG002 provides two independent, always-active comparators with fixed internal hysteresis and rail-to-rail I/O - simplifying design for applications requiring pure high-speed comparison without control logic overhead.
Can MAX942CSA+TG002 interface directly with 3.3V CMOS logic?
Yes, the MAX942CSA+TG002 can interface directly with 3.3V CMOS logic. Its outputs swing to within 0.2V of V+ (VOH ≥ V+ – 0.2V) and to 0.4V above GND (VOL ≤ 0.4V) while sourcing/sinking 400μA - meeting standard 3.3V CMOS VIH (≥2.0V) and VIL (≤0.8V) thresholds with margin. No external pull-up resistors or level shifters are needed, reducing BOM count and PCB area in mixed-voltage systems.
What is the maximum supply voltage rating for MAX942CSA+TG002?
The absolute maximum supply voltage for MAX942CSA+TG002 is +6.5V between V+ and GND. However, functional operation is guaranteed only from 2.7V to 5.5V per the Electrical Characteristics table. Operating continuously at 6.5V risks permanent damage and violates the device's specified operating conditions - design should limit V+ to ≤5.5V, with 5.0V or 3.3V recommended for optimal speed/power trade-off and long-term reliability.
Is MAX942CSA+TG002 pin-compatible with other packages in the MAX942 family?
Yes, the MAX942CSA+TG002 (SO-8) shares identical pinout and function mapping with the MAX942CPA (PDIP-8) and MAX942EUA-T (μMAX-8), as confirmed by the "MAX942" pin configuration diagram in the datasheet. All three variants use the same 1–8 pin numbering: V+, OUTB, INB−, INB+, GND, INA+, INA−, OUTA. This allows drop-in replacement across packages for prototyping (PDIP), volume production (SO), or space-constrained layouts (μMAX), provided thermal and soldering requirements are met.
MAX942CSA+TG002 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- :
- -
MAX942CSA+TG002 FAQ
1.How can I place an order for MAX942CSA+TG002 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX942CSA+TG002 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 MAX942CSA+TG002 reliable?
The price and inventory of MAX942CSA+TG002 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX942CSA+TG002 is usually 5 days.
3.What payment methods are accepted for MAX942CSA+TG002?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX942CSA+TG002 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX942CSA+TG002?
MAX942CSA+TG002 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX942CSA+TG002 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 MAX942CSA+TG002?
For technical support, including MAX942CSA+TG002 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX942CSA+TG002 requirements.
6.How does Aetrix verify that MAX942CSA+TG002 is sourced from the original manufacturer or authorized distributors?
All MAX942CSA+TG002 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 MAX942CSA+TG002 meets industry standards.
7.What is the process for return or replacement of MAX942CSA+TG002?
All MAX942CSA+TG002 units undergo pre-shipment inspection (PSI). If there is an issue with MAX942CSA+TG002, 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 MAX942CSA+TG002 part is unused and in its original packaging.
Return procedure for MAX942CSA+TG002:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX942CSA+TG002 Tags
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LM239DR
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LM2903P
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