My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX9691ESA
- Part No.:
- MAX9691ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9691ESA.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,486
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX9691ESA from Maxim Integrated is a single-channel, ultra-fast ECL-output comparator with 1.2ns typical propagation delay, ±11.5mV input offset voltage, and dual-rail operation at +5V and -5.2V. It features differential inputs, complementary open-emitter outputs compatible with 50Ω-terminated transmission lines, and operates across -40°C to +85°C - enabling high-speed line receivers and threshold detection in RF test equipment.
For engineers reviewing the MAX9691ESA datasheet, MAX9691ESA pinout, MAX9691ESA application, or MAX9691ESA equivalent, this device is selected for sub-2ns timing-critical decision circuits requiring ECL-level output drive, low dispersion (150ps), and stable DC matching at GHz-scale signal rates.
Technical Context
The MAX9691ESA implements a BiCMOS-based high-gain, wide-bandwidth comparator core optimized for minimal propagation delay skew (100ps) and dispersion (150ps) under 10–100mV input overdrive. Its input stage uses matched transistor pairs to maintain <±11.5mV offset across temperature, while the ECL output stage delivers fast rise/fall times (500ps) into 50Ω loads referenced to -2V.
Unlike latch-enabled variants (MAX9692/MAX9693), the MAX9691ESA omits latch-enable functionality and has no LE pin - confirmed by its 8-pin SO package pinout and Selector Guide. Its two ground pins (GND1 for input biasing, GND2 for output biasing) require separate low-inductance connections to a solid ground plane per layout guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 1.2ns typical (2.0ns max); enables clean decision sampling at >600MHz signal rates. |
| Input Offset Voltage | ±11.5mV max over -40°C to +85°C; ensures accurate threshold comparison without calibration. |
| Supply Voltages | +5V (VCC) and -5.2V (VEE); supports standard ECL logic interface and termination schemes. |
| Output Type | Complementary open-emitter (Q/Q̄); requires external 50–200Ω pull-down resistors to -2V or -5.2V. |
| Propagation Delay Skew | 100ps max between Q and Q̄ outputs; guarantees matched edge timing for differential signaling. |
| Dispersion | 150ps max over 10–100mV input overdrive; maintains consistent delay across varying signal amplitudes. |
| Common-Mode Range | -2.5V to +3.0V; accommodates wide-swing AC-coupled or DC-biased inputs in high-speed systems. |
Pinout & Package
MAX9691ESA is housed in an 8-pin SO (Small Outline) package per outline 21-0041, with gull-wing leads, RoHS-compliant finish, and 1.27mm pitch. Thermal derating is 7.4mW/°C above +70°C (588.2mW max at +70°C).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply (+5V); must be bypassed to GND with 0.1µF ceramic capacitor placed adjacent to pin. |
| 2 | IN+ | Noninverting input; differential pair node accepting high-speed analog or logic-level signals. |
| 3 | IN- | Inverting input; forms matched differential input pair with IN+ for noise rejection. |
| 4 | VEE | Negative supply (-5.2V); requires local 0.1µF ceramic decoupling to minimize ground bounce. |
| 5 | Q OUT | True output (open emitter); sinks current when active; requires external pull-down resistor. |
| 6 | Q OUT | Complementary output (open emitter); provides inverted logic state relative to Q OUT. |
| 7 | GND2 | Output-stage ground; connects to solid copper ground plane to stabilize ECL output bias. |
| 8 | GND1 | Input-stage ground; isolated from GND2 to prevent coupling of output switching noise into input path. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low propagation delay | 1.2ns typical enables real-time decision making in >600MHz signal paths without pipeline latency. |
| Matched differential outputs | 100ps skew between Q and Q̄ ensures precise timing alignment for ECL clock/data recovery circuits. |
| Stable DC matching | ±11.5mV input offset over full temperature range eliminates need for dynamic offset correction. |
| High common-mode input range | -2.5V to +3.0V supports direct interfacing with AC-coupled sources and varied bias networks. |
| Open-emitter ECL outputs | Drive 50Ω transmission lines directly with proper pull-down; simplifies integration into existing ECL backplanes. |
Applications
| High-Speed Line Receivers | Peak Detectors |
|---|---|
|
Use Scenario: Recovering NRZ data from lossy coaxial or microstrip channels operating above 500MHz. IC Role / Device Role / Timing Role: Decision circuit sampling incoming waveform at optimal eye-center point with sub-2ns resolution. Use Value: 1.2ns propagation delay and 150ps dispersion preserve jitter margin in 1–2 Gbps serial links. |
Use Scenario: Capturing maximum amplitude of pulsed RF envelope signals in spectrum analyzers. IC Role / Device Role / Timing Role: Fast comparator detecting instantaneous signal peaks against a reference voltage. Use Value: 100ps skew and matched Q/Q̄ outputs enable precise zero-crossing detection for peak-hold control loops. |
| Threshold Detectors | High-Speed Triggers |
|
Use Scenario: Monitoring analog sensor outputs (e.g., laser diode monitor photodiodes) for fault-level excursions. IC Role / Device Role / Timing Role: Precision voltage comparator asserting digital alarm when input exceeds programmable threshold. Use Value: ±11.5mV input offset ensures repeatable trip points across industrial temperature range without trimming. |
Use Scenario: Generating synchronous strobes for time-of-flight measurements in LIDAR or particle detectors. IC Role / Device Role / Timing Role: Edge-triggered comparator converting fast transient events into deterministic logic pulses. Use Value: 500ps rise/fall time and 1.2ns delay allow sub-nanosecond time-stamping resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast ECL-output comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9691EUA | Identical electrical specs but in 8-pin µMAX (3mm × 3mm) package; 4.8mW/°C thermal derating vs. SO's 7.4mW/°C. | Preferred where PCB area is constrained; requires tighter layout control due to smaller footprint and higher thermal resistance. | Select MAX9691EUA only if space savings outweigh thermal management complexity in high-power-density designs. |
| ADCMP572BCPZ-R7 | 1.1ns propagation delay, but PECL-compatible (not ECL); requires -2.0V VEE and +3.3V VCC; 1.5mA lower ICC. | Used in mixed-signal FPGA clocking; lacks open-emitter outputs - drives 50Ω loads via internal 50Ω series termination. | Choose ADCMP572BCPZ-R7 when interfacing with modern FPGAs using PECL I/O standards and lower power is prioritized. |
Compared with MAX9691ESA, MAX9691EUA offers identical performance in a smaller package but reduced thermal headroom, while ADCMP572BCPZ-R7 trades ECL compatibility for PECL support and lower supply current - making it suitable for newer digital systems but incompatible with legacy ECL backplanes.
Availability
MAX9691ESA is available at Aetrix Electronics and suitable for high-speed line receivers, peak detectors, threshold detectors, high-speed triggers, and RF test instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX9691ESA 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for industrial, communications, and computing applications.
The MAX9691ESA belongs to Maxim's ultra-high-speed comparator product line, designed specifically for GHz-rate signal acquisition, timing-critical decision circuits, and ECL/PECL system interfacing in test equipment and optical infrastructure.
FAQ
What is the maximum operating frequency supported by the MAX9691ESA?
The MAX9691ESA supports signal processing at frequencies exceeding 600MHz, as verified by worst-case propagation delay measurements down to 1.2ns and demonstrated in 100MHz and 600MHz+ application waveforms. Its 1.2ns propagation delay and 500ps rise/fall time ensure reliable decision sampling within the eye diagram of high-speed serial data streams, making MAX9691ESA suitable for real-time RF envelope detection and gigabit line receiver applications.
Does the MAX9691ESA include a latch-enable function?
No, the MAX9691ESA does not include a latch-enable function. Per the Selector Guide and Pin Description, only MAX9692 and MAX9693 variants feature LE inputs; the MAX9691ESA is a single comparator without latch capability and has no LE pin in its 8-pin SO configuration. Its functional diagram shows only IN+, IN-, Q OUT, Q OUT, VCC, VEE, GND1, and GND2 - confirming MAX9691ESA is intended for continuous comparison, not sample-and-hold operation.
What are the required external components for MAX9691ESA output termination?
The MAX9691ESA outputs are open-emitter and require external pull-down resistors. For -2V termination, use 50Ω to 200Ω resistors; for -5.2V termination, use 240Ω to 2000Ω resistors. These resistors must connect to the appropriate negative rail (VT = -2V or VEE = -5.2V) and be placed close to the device. MAX9691ESA's complementary outputs (Q and Q̄) each need independent pull-downs to ensure correct ECL logic levels and impedance matching to 50Ω transmission lines.
How does the dual-ground architecture (GND1 and GND2) improve MAX9691ESA performance?
GND1 biases the input differential pair, while GND2 biases the ECL output stage - isolating sensitive analog input circuitry from noisy digital output switching. This separation reduces crosstalk-induced offset drift and improves propagation delay stability. The MAX9691ESA datasheet mandates connecting both GND1 and GND2 to a solid copper ground plane, not a shared net, to maintain >60dB PSRR and minimize dispersion. This architecture directly contributes to MAX9691ESA's 100ps skew and 150ps dispersion specifications.
Can the MAX9691ESA operate with a single supply?
No, the MAX9691ESA requires dual supplies: +5V (VCC) and -5.2V (VEE). Its BiCMOS process and ECL output stage are designed for bipolar rail operation. Attempting single-supply use violates Absolute Maximum Ratings (VEE must be ≤ -4.7V for specified -PSRR), causes undefined output states, and risks permanent damage. The MAX9691ESA datasheet specifies all electrical characteristics only under dual-rail conditions, and layout guidelines assume separate VCC and VEE decoupling - confirming MAX9691ESA is strictly a dual-supply device.
MAX9691ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- with Latch
- Number of Elements:
- 1
- Output Type:
- Complementary, ECL
- Voltage - Supply, Single/Dual (±):
- -
- :
- 6.5mV @ 5V
- Voltage - Input Offset (Max):
- 20µA @ 5V
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 26mA
- Current - Quiescent (Max):
- 80dB CMRR, 60dB PSRR
- CMRR, PSRR (Typ):
- 1.8ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX9691ESA FAQ
1.How can I place an order for MAX9691ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9691ESA 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 MAX9691ESA reliable?
The price and inventory of MAX9691ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9691ESA is usually 5 days.
3.What payment methods are accepted for MAX9691ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9691ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9691ESA?
MAX9691ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9691ESA 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 MAX9691ESA?
For technical support, including MAX9691ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9691ESA requirements.
6.How does Aetrix verify that MAX9691ESA is sourced from the original manufacturer or authorized distributors?
All MAX9691ESA 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 MAX9691ESA meets industry standards.
7.What is the process for return or replacement of MAX9691ESA?
All MAX9691ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX9691ESA, 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 MAX9691ESA part is unused and in its original packaging.
Return procedure for MAX9691ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX9691ESA Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
