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Analog Devices Inc./Maxim Integrated MAX997ESA-T
- Part No.:
- MAX997ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX997ESA-T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,253
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Product details
Overview
The MAX997ESA-T from Maxim Integrated is a single ultra-high-speed comparator with internal hysteresis, optimized for +3V or +5V single-supply operation. It features 4.5ns propagation delay (5mV overdrive), 5mA supply current per comparator, ±3.5mV input-referred hysteresis, and Beyond-the-Rails™ input range extending 100mV beyond VCC and GND - used in GPS receivers, high-speed sampling circuits, and threshold detection where fast, clean switching is critical.
For engineers reviewing the MAX997ESA-T datasheet, MAX997ESA-T pinout, MAX997ESA-T application, or MAX997ESA-T equivalent, key selection considerations include its shutdown capability (270μA), TTL/CMOS-compatible output drive (4mA to within 0.52V of rails), SO-8 package footprint, -40°C to +85°C temperature rating, and absence of latch-enable functionality compared to MAX961/MAX963.
Technical Context
The MAX997ESA-T implements a current-driven output stage enabling rapid slew rates and rail-to-rail output swing without external pull-ups. Its internal 3.5mV hysteresis eliminates need for external feedback resistors while preventing oscillation near trip points.
It supports shutdown mode via SHDN pin, reducing supply current to 270μA per comparator and placing outputs in high-impedance state. Unlike MAX961/MAX963, it lacks latch-enable logic and complementary outputs - confirming its role as a streamlined, single-output high-speed comparator for deterministic timing paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 4.5ns typical at 5mV overdrive - enables sub-5ns decision latency in time-critical sampling and clock recovery. |
| Supply Voltage Range | +2.7V to +5.5V - supports direct interface with 3.3V and 5V logic domains without level shifting. |
| Input Common-Mode Range | -0.1V to VCC + 0.1V - allows inputs to exceed supply rails by 100mV, simplifying sensor interfacing in battery-powered systems. |
| Output Drive Capability | Sinks or sources 4mA to within 0.52V of GND or VCC - ensures robust TTL/CMOS logic compatibility without external buffers. |
| Shutdown Current | 270μA per comparator - reduces system power during idle cycles in portable or energy-constrained applications. |
| Hysteresis | 3.5mV input-referred - provides noise immunity without external components, stabilizing output against small input fluctuations. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive-adjacent environments requiring reliability across thermal extremes. |
Pinout & Package
MAX997ESA-T is housed in an 8-pin SO (Small Outline) package, surface-mount, RoHS-compliant, with standard 1.27mm pitch and JEDEC MS-012AC outline.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection | Internally unconnected; leave floating or tie to GND per layout best practice to suppress parasitic coupling. |
| 2 | IN− | Inverting input terminal - accepts differential input signals up to 100mV beyond rails; referenced to common-mode voltage. |
| 3 | IN+ | Noninverting input terminal - primary signal input for threshold comparison; matched impedance to IN−. |
| 4 | GND | Analog/digital ground reference - must connect to low-inductance PCB ground plane for stable high-speed operation. |
| 5 | SHDN | Active-high shutdown control - drives device into low-power state (270μA) when logic high; tie to GND for normal operation. |
| 6 | VCC | Positive supply input - accepts 2.7V–5.5V; requires local 0.1μF ceramic decoupling capacitor placed adjacent to pin. |
| 7 | Q | TTL/CMOS-compatible output - open-drain capable, sinks/sources 4mA, swings within 0.52V of rails; no complementary output provided. |
| 8 | No Connection | Internally unconnected; same handling as Pin 1 - avoid routing signals or traces to this pad. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast propagation delay | 4.5ns typical ensures minimal latency in real-time signal conditioning and clock edge detection. |
| Beyond-the-Rails™ input range | ±100mV beyond VCC/GND enables direct connection to sensors or transducers operating outside supply domain. |
| Integrated 3.5mV hysteresis | Eliminates need for external positive feedback resistors, reducing BOM count and board space in threshold detectors. |
| Shutdown mode with 270μA ICC | Enables dynamic power gating in battery-operated systems without compromising wake-up speed (tON = 250ns). |
| TTL/CMOS-compatible output | Drives standard logic loads directly - avoids level translators or buffer ICs in mixed-voltage digital interfaces. |
Applications
| GPS Receivers | High-Speed Sampling Circuits |
|---|---|
Use Scenario: Converting analog IF or baseband signals from GPS front-end into clean digital pulses for correlation and timing acquisition. IC Role / Device Role / Timing Role: High-speed comparator performing zero-crossing or threshold detection on RF-derived waveforms with nanosecond-level timing fidelity. Use Value: 4.5ns propagation delay and 3.5mV hysteresis ensure jitter-free pulse generation essential for precise code-phase alignment in GPS correlators. | Use Scenario: Digitizing fast transient events in oscilloscopes, data loggers, or automated test equipment using flash or pipeline ADC front-ends. IC Role / Device Role / Timing Role: Comparator acting as strobe generator or window detector triggering sample capture at exact voltage thresholds. Use Value: Rail-to-rail output swing and sub-5ns delay enable accurate timing synchronization between analog event and digital sampling clock edges. |
| Threshold Detectors | Line Receivers |
Use Scenario: Monitoring battery voltage, temperature sensor outputs, or fault signals in portable medical devices and IoT edge nodes. IC Role / Device Role / Timing Role: Single-supply comparator detecting overvoltage, undervoltage, or out-of-range conditions with hysteresis to prevent chatter. Use Value: Internal 3.5mV hysteresis and Beyond-the-Rails input allow direct sensing of voltages slightly above VCC or below GND without external biasing networks. | Use Scenario: Receiving differential or single-ended communication signals in industrial fieldbus or legacy serial links where signal integrity degrades over long traces. IC Role / Device Role / Timing Role: High-speed line receiver converting attenuated or noisy analog line signals into clean digital logic levels. Use Value: 5mA output drive and 0.52V rail margin guarantee reliable logic-level translation even under heavy capacitive loading or marginal signal swing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX961ESA | Includes latch-enable (LE) and complementary outputs (Q/Q̄); otherwise identical speed, hysteresis, and supply specs. | Required where output state must be held asynchronously (e.g., peak detection, gated sampling); adds complexity and pin count. | Select MAX961ESA only if latch function is needed; MAX997ESA-T offers simpler interface and lower pin count for basic threshold decisions. |
| LMH7322MA/NOPB | Higher 2.5ns propagation delay, dual-channel, no internal hysteresis, requires external feedback; 3.3V-only supply. | Suitable for ultra-low-latency dual-path systems but mandates external hysteresis design and lacks rail-exceeding input range. | Choose LMH7322MA/NOPB only when <3ns delay is mandatory and design can accommodate external hysteresis and tighter supply constraints. |
Compared with MAX961ESA, MAX997ESA-T removes latch logic and complementary output to reduce cost and simplify PCB layout, while retaining identical speed, hysteresis, and rail-exceeding input capability; versus LMH7322MA/NOPB, it trades raw speed for integrated hysteresis, wider supply range, and Beyond-the-Rails operation - making it more robust for general-purpose high-speed detection.
Availability
MAX997ESA-T is available at Aetrix Electronics and suitable for GPS receivers, high-speed sampling circuits, and threshold detectors requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX997ESA-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, mixed-signal, and high-speed interface ICs for industrial, communications, and consumer applications.
The MAX961–MAX964/MAX997/MAX999 family delivers ultra-high-speed comparators optimized for single-supply, low-power, rail-exceeding operation in portable and timing-critical systems.
FAQ
What is the maximum supply voltage for MAX997ESA-T?
The MAX997ESA-T supports a supply voltage range of +2.7V to +5.5V. Absolute maximum rating is +6V on VCC relative to GND. Operation above +5.5V is not guaranteed and may cause permanent damage. The device is fully specified and characterized from +2.7V to +5.5V, including propagation delay, hysteresis, and output drive performance - all verified across the full -40°C to +85°C temperature range for the MAX997ESA-T.
Does MAX997ESA-T have a latch-enable function?
No, the MAX997ESA-T does not include a latch-enable feature. Unlike the MAX961ESA or MAX963ESD, which provide LE pins and complementary outputs, the MAX997ESA-T is a simplified single-output comparator with only IN+, IN−, SHDN, Q, VCC, and GND connections. Its pinout omits latch control logic entirely - confirmed by the Pin Description table and Selector Guide in the official datasheet, where MAX997 is explicitly listed as having "No" for Latch Enable.
What is the input hysteresis value for MAX997ESA-T?
The MAX997ESA-T has a fixed internal input-referred hysteresis of 3.5mV, as specified in the Electrical Characteristics table under "Input-Referred Hysteresis." This value is process-trimmed and stable across temperature and supply voltage. It provides noise immunity without requiring external feedback components - a key differentiator from standard comparators that rely on external resistor networks to implement hysteresis.
Can MAX997ESA-T operate with inputs beyond the supply rails?
Yes, the MAX997ESA-T supports Beyond-the-Rails™ input operation: its input common-mode voltage range extends from -0.1V to VCC + 0.1V. This means either IN+ or IN− can be driven up to 100mV below GND or above VCC without damage or false output inversion - provided the other input remains within the valid common-mode range. This capability is confirmed in both the General Description and Absolute Maximum Ratings sections of the datasheet.
What package type is used for MAX997ESA-T?
The MAX997ESA-T uses an 8-pin SO (Small Outline) package, also referred to as SOIC-8 or SO-8, with JEDEC MS-012AC outline, 1.27mm lead pitch, and RoHS-compliant finish. This is distinct from the μMAX® (U8-1) variant MAX997EUA-T and confirms the "ESA" suffix per Maxim's ordering information table - where "ESA" maps exclusively to the 8-pin SO package.
MAX997ESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- Beyond-the-Rails™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 1.5mV @ 5V
- Voltage - Input Offset (Max):
- 15µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 6.5mA
- Current - Quiescent (Max):
- 80dB CMRR, 86.02dB PSRR
- CMRR, PSRR (Typ):
- 7ns
- Propagation Delay (Max):
- 3.5mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX997ESA-T FAQ
1.How can I place an order for MAX997ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX997ESA-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 MAX997ESA-T reliable?
The price and inventory of MAX997ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX997ESA-T is usually 5 days.
3.What payment methods are accepted for MAX997ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX997ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX997ESA-T?
MAX997ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX997ESA-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 MAX997ESA-T?
For technical support, including MAX997ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX997ESA-T requirements.
6.How does Aetrix verify that MAX997ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX997ESA-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 MAX997ESA-T meets industry standards.
7.What is the process for return or replacement of MAX997ESA-T?
All MAX997ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX997ESA-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 MAX997ESA-T part is unused and in its original packaging.
Return procedure for MAX997ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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