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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:3,328
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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 both rails - 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 shutdown capability (270μA quiescent), TTL/CMOS-compatible push-pull output sinking/sourcing 4mA to within 0.52V of GND/VCC, and guaranteed operation across –40°C to +85°C in 8-pin SO package.
Technical Context
This comparator employs a current-driven output stage enabling rapid slew rate and rail-to-rail output swing without external pull-ups. Its internal 3.5mV hysteresis eliminates need for external feedback resistors and suppresses noise-induced oscillation near trip points.
The device integrates shutdown control (SHDN pin) that places outputs in high-impedance state and reduces supply current to 270μA per comparator. Input stage includes diode-based differential protection limiting voltage across IN+/IN– to ≤2.1V and supporting common-mode operation from –0.1V to VCC + 0.1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 4.5ns at 5mV overdrive - enables sub-5ns decision timing in high-speed sampling and clock recovery. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interface with modern low-voltage logic and battery-powered systems. |
| Input Common-Mode Range | –0.1V to VCC + 0.1V - allows detection of signals below GND or above VCC without level-shifting circuitry. |
| Output Drive Capability | Sinks/sources 4mA to within 0.52V of GND or VCC - ensures robust TTL/CMOS logic compatibility without external buffers. |
| Hysteresis | 3.5mV input-referred - provides noise immunity and eliminates external hysteresis resistors in threshold detection. |
| Shutdown Current | 270μA per comparator - enables power-gating in portable systems during idle periods. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive-adjacent embedded applications. |
Pinout & Package
MAX997ESA+T is housed in an 8-pin SO (Small Outline) package with exposed pad not present; RoHS-compliant lead-free finish denoted by '+' suffix.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No internal connection - must be left floating or tied to GND per layout best practice to prevent parasitic coupling. |
| 2 | IN− | Inverting input - accepts signals up to 100mV beyond rails; differential input impedance is 8kΩ. |
| 3 | IN+ | Noninverting input - same rail-to-rail common-mode range as IN−; input bias current ±15µA max. |
| 4 | GND | Analog/digital ground reference - requires low-inductance plane for stable high-speed operation. |
| 5 | N.C. | No internal connection - identical handling requirement as Pin 1. |
| 6 | VCC | Positive supply input - must be decoupled with 0.1µF ceramic capacitor placed adjacent to pin. |
| 7 | Q | TTL/CMOS-compatible active-high output - drives loads directly; output capacitance is 4pF. |
| 8 | SHDN | Active-high shutdown control - pulls output to high-Z and reduces ICC to 270μA when logic high. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast propagation delay | 4.5ns typ. at 5mV overdrive - meets timing budgets in >200MHz sampling and line receiver designs. |
| Beyond-the-Rails™ input range | –0.1V to VCC + 0.1V - enables direct sensing of signals crossing supply boundaries without clamping diodes. |
| Integrated 3.5mV hysteresis | Eliminates external resistor network - reduces BOM count and PCB area in precision threshold detectors. |
| Shutdown mode | 270μA per comparator quiescent - extends battery life in portable GPS and instrumentation systems. |
| TTL/CMOS-compatible output | Drives 4mA load to within 0.52V of rails - interfaces directly with FPGA I/O banks and microcontroller GPIOs. |
Applications
| GPS Receivers | High-Speed Sampling Circuits |
|---|---|
Use Scenario: Converting analog IF or baseband signals into digital logic levels for correlation and timing recovery in GNSS front-ends. IC Role / Device Role / Timing Role: High-speed comparator performing zero-crossing detection on band-limited RF-derived waveforms. Use Value: 4.5ns propagation delay and 3.5mV hysteresis ensure jitter-free edge alignment critical for code-phase measurement accuracy. | Use Scenario: Capturing transient events in oscilloscopes, time-domain reflectometers, and automated test equipment. IC Role / Device Role / Timing Role: Threshold detector triggering sample-and-hold or ADC start-of-conversion with minimal latency. Use Value: Sub-5ns delay and rail-to-rail output drive enable precise timing capture at >200MSPS effective rates. |
| Threshold Detectors | Portable/Battery-Powered Systems |
Use Scenario: Monitoring battery voltage, sensor outputs, or fault conditions in medical wearables and IoT endpoints. IC Role / Device Role / Timing Role: Single-supply comparator generating logic-level alerts when analog inputs cross programmable thresholds. Use Value: Internal hysteresis prevents chatter during slow-moving signals; shutdown mode cuts standby current to 270μA. | Use Scenario: Power management and signal conditioning in handheld test gear, portable radios, and field-deployable sensors. IC Role / Device Role / Timing Role: Low-power, rail-compatible comparator interfacing between analog sensors and 3.3V/5V microcontrollers. Use Value: 2.7V–5.5V supply range and Beyond-the-Rails inputs eliminate level shifters; SO package supports compact layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX961ESA+ | Includes latch-enable (LE) pin and complementary outputs; otherwise identical speed, hysteresis, and shutdown behavior. | Required where output latching is needed for asynchronous event capture or hold functionality. | Select MAX961ESA+ only if latch-enable and Q/Q outputs are required; MAX997ESA+T offers simpler interface and lower pin count. |
| LMH7322MA/NOPB | Higher supply current (11mA), no shutdown mode, 4.3ns delay, but wider supply range (2.7V–12.6V) and higher output drive (±50mA). | Preferred in high-current, wide-VCC industrial systems where power efficiency is secondary to drive strength. | Choose LMH7322MA/NOPB for >12V operation or heavy capacitive loads; MAX997ESA+T is optimal for low-power, 3V/5V portable designs. |
Compared with MAX961ESA+, the MAX997ESA+T removes latch and complementary output complexity while retaining identical speed, hysteresis, and shutdown - simplifying design for basic threshold detection. Versus LMH7322MA/NOPB, it trades higher drive and wider VCC for 5.5x lower quiescent current and integrated shutdown, making it superior for battery-constrained applications.
Availability
MAX997ESA+T is available at Aetrix Electronics and suitable for GPS receivers, high-speed sampling circuits, and portable/battery-powered systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
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 ICs for industrial, communications, and consumer applications.
The MAX997ESA+T belongs to the MAX961–MAX999 ultra-high-speed comparator family, engineered for low-power, single-supply operation in portable and timing-critical systems demanding sub-5ns response and rail-to-rail input flexibility.
FAQ
What is the operating temperature range for MAX997ESA+T?
The MAX997ESA+T is specified for operation from –40°C to +85°C across all electrical parameters. This E-grade qualification makes it suitable for industrial environments and automotive-adjacent applications where thermal stability is essential. The device's input offset voltage and propagation delay remain within guaranteed limits across this full range, as confirmed in the datasheet's Electrical Characteristics tables.
Does MAX997ESA+T support shutdown mode, and how is it controlled?
Yes, MAX997ESA+T supports active-high shutdown via Pin 8 (SHDN). When SHDN is driven high, the comparator enters low-power state drawing only 270μA per comparator and places its output (Pin 7) in high-impedance state. For normal operation, SHDN must be tied to GND. The shutdown disable time (tON) is 250ns, ensuring rapid reactivation in duty-cycled systems.
What is the input common-mode voltage range of MAX997ESA+T?
The MAX997ESA+T features a Beyond-the-Rails™ input common-mode range of –0.1V to VCC + 0.1V. This means either input (IN+ or IN−) can be driven 100mV below GND or 100mV above VCC without damage or false output inversion - provided the other input remains within this range. This capability eliminates level-shifting circuitry in many sensor interface applications.
Can MAX997ESA+T drive standard TTL or CMOS logic directly?
Yes, MAX997ESA+T provides TTL/CMOS-compatible push-pull output (Pin 7, Q) capable of sinking or sourcing 4mA while maintaining VOH ≥ VCC – 0.52V and VOL ≤ 0.52V. This meets standard 3.3V and 5V logic thresholds without external pull-up resistors or buffer stages, simplifying interconnect to FPGAs, microcontrollers, and ASICs.
What package type and footprint does MAX997ESA+T use?
MAX997ESA+T uses an 8-pin SO (Small Outline) package with standard 150-mil body width and 1.27mm pitch. The package code is S8-2, land pattern number 90-0096, and it features RoHS-compliant lead-free termination indicated by the '+' suffix. No exposed thermal pad is present.
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:
- Active
- 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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