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Analog Devices Inc./Maxim Integrated MAX997ESA+
- Part No.:
- MAX997ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX997ESA+.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:268
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Product details
Overview
The MAX997ESA+ 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, Beyond-the-Rails™ input range (–0.1V to VCC + 0.1V), and shutdown mode consuming only 270μA - used in GPS receivers, high-speed sampling circuits, and threshold detection where rail-to-rail input margin and nanosecond response are critical.
For engineers reviewing the MAX997ESA+ datasheet, MAX997ESA+ pinout, MAX997ESA+ application, or MAX997ESA+ equivalent, this page delivers verified electrical parameters, SO-8 package terminal mapping, real-world use scenarios, and two validated alternative comparators with documented functional and application differences.
Technical Context
The MAX997ESA+ implements a current-driven output stage enabling TTL/CMOS-compatible outputs that sink or source 4mA within 0.52V of GND or VCC. Its internal 3.5mV hysteresis eliminates external feedback resistors and prevents oscillation near trip points.
It uses a dedicated SHDN pin to enter low-power shutdown (270μA/comparator), placing outputs in high-impedance state. Unlike MAX961/MAX963, it lacks latch-enable functionality 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 or zero-crossing detection. |
| Supply Voltage Range | +2.7V to +5.5V - supports direct integration into 3V and 5V logic domains without level-shifting. |
| Input Common-Mode Range | –0.1V to VCC + 0.1V - accepts signals beyond supply rails, simplifying sensor interface in battery-powered systems. |
| Supply Current (Active) | 5mA per comparator at VCC = 5V - balances speed and power for portable instrumentation. |
| Shutdown Current | 270μA per comparator - reduces system standby power while preserving fast wake-up capability. |
| Output Drive | Sinks/sources 4mA to within 0.52V of GND/VCC - directly drives CMOS/TTL loads without pull-up resistors. |
| Input Hysteresis | 3.5mV - suppresses noise-induced chatter without external components, ensuring clean digital transitions. |
Pinout & Package
MAX997ESA+ is housed in an 8-pin SO (Small Outline) package with exposed pad not connected internally. Pin assignments are fully validated per Maxim's official pin configuration diagram (Rev 8, Dec 2020).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection | Internally unconnected; leave floating or tie to GND per layout best practice to prevent parasitic coupling. |
| 2 | IN− | Inverting input terminal - differential voltage applied here relative to IN+ determines output state. |
| 3 | IN+ | Noninverting input terminal - accepts Beyond-the-Rails signals up to –0.1V or VCC + 0.1V. |
| 4 | GND | Analog/digital ground reference - must connect to low-inductance PCB ground plane for stable high-speed operation. |
| 5 | No Connection | Internally unconnected; same handling as Pin 1. |
| 6 | VCC | Positive supply input - requires local 0.1μF ceramic decoupling capacitor placed adjacent to pin. |
| 7 | SHDN | Active-high shutdown control - drives high to reduce supply current to 270μA and place output in high-Z state. |
| 8 | Q | TTL/CMOS-compatible output - active-high when IN+ > IN− (with hysteresis); sinks 4mA to 0.52V above GND. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast 4.5ns propagation delay | Enables reliable sampling of >200MHz analog signals with deterministic timing margins. |
| Beyond-the-Rails™ input range | Accepts inputs 100mV below GND or above VCC - eliminates need for input biasing in single-supply sensor front-ends. |
| Integrated 3.5mV hysteresis | Prevents metastability and noise-induced toggling without external resistor networks or layout compromises. |
| Shutdown mode (270μA) | Reduces system-level quiescent power by >94% during idle periods while retaining fast reactivation (<250ns). |
| TTL/CMOS-compatible output | Directly interfaces to FPGA I/O banks, microcontroller GPIO, or logic gates without level translators or pull-ups. |
Applications
| GPS Receivers | High-Speed Sampling Circuits |
|---|---|
Use Scenario: Converting weak, noisy IF signals from GPS antenna frontend into clean digital clock edges for baseband processing. IC Role / Device Role / Timing Role: Threshold detector generating precise zero-crossing pulses synchronized to satellite carrier frequency. Use Value: 4.5ns propagation delay and 3.5mV hysteresis ensure jitter-free edge generation even under low-SNR conditions. | Use Scenario: Capturing transient events in oscilloscopes or logic analyzers requiring sub-5ns decision windows. IC Role / Device Role / Timing Role: High-speed comparator triggering ADC sampling clocks or latching data on signal thresholds. Use Value: Nanosecond delay consistency across temperature (±0.3ns skew) guarantees accurate time-of-arrival measurement. |
| Portable/Battery-Powered Systems | Threshold Detectors/Discriminators |
Use Scenario: Monitoring battery voltage or sensor outputs in handheld medical devices or IoT nodes with strict power budgets. IC Role / Device Role / Timing Role: Low-power comparator enabling periodic wake-up from deep sleep via voltage threshold crossing. Use Value: 270μA shutdown current extends battery life; Beyond-the-Rails input allows direct connection to Li-ion cells (2.7–4.2V range). | Use Scenario: Detecting overvoltage/undervoltage conditions in DC-DC converter feedback loops or motor drive protection circuits. IC Role / Device Role / Timing Role: Precision discriminator asserting fault flags when sensed voltage exceeds programmable limits. Use Value: Input offset voltage ≤ ±2.0mV (typ) and CMRR ≥ 0.1mV/V ensure stable trip points despite supply ripple or common-mode noise. |
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); same SO-8 package and 4.5ns delay. | Required where output state must be held asynchronously (e.g., peak-hold circuits, strobed data capture). | Select MAX961ESA+ only if latch function is needed; otherwise MAX997ESA+ offers lower complexity and identical speed/power. |
| TLV3501CD | 4.5ns delay, 2.7–5.5V supply, but no shutdown mode; 6mA supply current; SO-8 package. | Suitable for always-on systems where shutdown is unnecessary; lacks internal hysteresis (requires external feedback). | Choose TLV3501CD when board space permits external hysteresis resistors and shutdown is not required. |
Compared with MAX961ESA+, MAX997ESA+ removes latch logic to reduce propagation skew and simplify timing analysis; versus TLV3501CD, it integrates hysteresis and shutdown - reducing BOM count and enabling adaptive power management in portable designs.
Availability
MAX997ESA+ 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+ 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 demanding industrial, medical, and communications applications.
The MAX961–MAX964/MAX997/MAX999 family targets ultra-high-speed comparator applications requiring nanosecond response, rail-exceeding inputs, and low-power operation in portable and timing-critical systems.
FAQ
What is the operating temperature range for MAX997ESA+?
The MAX997ESA+ is specified over the industrial temperature range of –40°C to +85°C. This rating applies to all E-grade devices including MAX997ESA+, and is guaranteed by design across the full range. No derating is required within these limits, and performance parameters such as propagation delay (4.5ns typ), supply current (5mA), and hysteresis (3.5mV) remain valid across the entire span.
Does MAX997ESA+ include internal hysteresis, and what is its value?
Yes, MAX997ESA+ includes fixed internal hysteresis of 3.5mV, confirmed in the Electrical Characteristics table under "Input-Referred Hysteresis." This value is process-trimmed and temperature-stable, eliminating the need for external hysteresis resistors. It ensures clean switching behavior in noisy environments and prevents oscillation near input trip points - a key differentiator from general-purpose comparators.
Can MAX997ESA+ operate from a 3.3V supply, and what are the output voltage levels?
Yes, MAX997ESA+ operates from +2.7V to +5.5V, fully supporting 3.3V systems. At VCC = 3.3V, the output high voltage (VOH) is guaranteed to be ≥ VCC – 0.52V = 2.78V when sourcing 4mA, and output low voltage (VOL) is ≤ 0.52V when sinking 4mA. These levels are TTL/CMOS-compatible and meet standard logic thresholds for 3.3V interfaces without external level shifting.
How does the shutdown feature work on MAX997ESA+, and what happens to the output?
When the SHDN pin is driven high, MAX997ESA+ enters shutdown mode, reducing supply current to 270μA per comparator. During shutdown, the output (Pin 8, Q) transitions to a high-impedance (high-Z) state - neither sourcing nor sinking current. The output remains in high-Z until SHDN is pulled low and sufficient time elapses (tON = 250ns max) for internal biasing to stabilize and restore valid logic levels.
Is MAX997ESA+ pin-compatible with other comparators in the MAX961–MAX999 family?
No, MAX997ESA+ is not pin-compatible with MAX961ESA+ or MAX962ESA+, despite sharing the same 8-pin SO package. Pin 1 and Pin 5 are No Connect in MAX997ESA+, whereas MAX961ESA+ uses Pin 1 for LE and Pin 5 for Q̄. Substituting without board revision risks incorrect logic behavior or open-circuit inputs. Always verify pin functions using the official Maxim pin configuration diagrams before replacement.
MAX997ESA+ 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:
- Tube
- 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+ FAQ
1.How can I place an order for MAX997ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX997ESA+ 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+ reliable?
The price and inventory of MAX997ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX997ESA+ is usually 5 days.
3.What payment methods are accepted for MAX997ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX997ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX997ESA+?
MAX997ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX997ESA+ 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+?
For technical support, including MAX997ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX997ESA+ requirements.
6.How does Aetrix verify that MAX997ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX997ESA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX997ESA+?
All MAX997ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX997ESA+, 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+ part is unused and in its original packaging.
Return procedure for MAX997ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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