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Analog Devices Inc./Maxim Integrated MAX912ESE+T
- Part No.:
- MAX912ESE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX912ESE+T.pdf
- Description:
- IC COMPARATOR 2 W/LATCH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,490
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Product details
Overview
MAX912ESE+T from Maxim Integrated is a dual, ultra-fast, low-power precision TTL comparator with differential inputs and complementary TTL outputs. It operates from single +5V or dual ±5V supplies, delivers 10ns typical propagation delay, draws only 6mA per comparator at +5V, and features stable linear-region operation-making it ideal for high-speed switching regulators and V/F converters in industrial and embedded systems.
For engineers reviewing the MAX912ESE+T datasheet, MAX912ESE+T pinout, MAX912ESE+T application, or MAX912ESE+T equivalent, key selection criteria include latch-enable functionality per channel, input common-mode range extending below the negative rail (–0.2V to +3.5V on single +5V), stable linear-region behavior without hysteresis, and compatibility with TTL-level logic interfaces in timing-critical sampling circuits.
Technical Context
The MAX912ESE+T integrates two independent high-speed comparators sharing a common supply architecture but featuring separate latch-enable (LEA/LEB) controls. Its bipolar process enables fast propagation (10ns typ) while maintaining low offset voltage (0.8mV typ) and wide input common-mode range (–0.2V to +3.5V on +5V supply).
Unlike conventional high-speed comparators, it eliminates output instability in the linear region by design-no minimum input slew rate required-and avoids power-supply current spiking during transitions. Each comparator supports transparent/latched operation via dedicated TTL-compatible enable pins, enabling synchronized sampling in multi-channel systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 10ns typical (ΔVIN = 100mV, VOD = 20mV); ensures sub-100MHz signal edge detection in real-time control loops. |
| Supply Voltage Range | +4.5V to +5.5V (single) or ±5V (dual); supports robust operation across industrial voltage tolerances. |
| Input Offset Voltage | 0.8mV typical at +25°C; enables accurate zero-crossing detection with <1mV resolution error. |
| Input Common-Mode Range | –0.2V to +3.5V on +5V supply; allows direct interfacing with ground-referenced sensors and DACs. |
| Supply Current per Comparator | 6mA typical at +5V; enables dual-channel high-speed comparison with minimal thermal load in space-constrained designs. |
| Output Type | Complementary TTL (QA/QA, QB/QB); drives standard logic loads without level-shifting circuitry. |
| Latch Enable Threshold | VIH ≥ 2.0V, VIL ≤ 0.8V; compatible with standard TTL and CMOS logic families for synchronous sampling. |
Pinout & Package
MAX912ESE+T is housed in a 16-pin narrow SO (SOICN) package, 3.9mm × 9.9mm body size, with 1.27mm pitch, RoHS-compliant, and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | QA / QB | True TTL output for comparator A/B; sinks/sourcing capability supports direct connection to logic gates or microcontroller inputs. |
| 2, 15 | QA / QB | Complementary TTL output for comparator A/B; enables differential signaling or latched state monitoring without external inverters. |
| 3, 14 | GND | Dedicated logic ground pins; must be connected to system ground plane to minimize noise coupling into analog inputs. |
| 4, 13 | LEA / LEB | Latch-enable inputs for comparator A/B; TTL-high or floating enables latching; TTL-low enables transparent mode for real-time response. |
| 5, 12 | N.C. | No internal connection; left unconnected per datasheet-no routing or termination required. |
| 6 | V− | Negative supply terminal; tied to GND for single +5V operation or –5V for dual supply; requires local 0.1µF ceramic bypass. |
| 7, 9 | INA− / INB+ | Inverting input for A, noninverting for B; differential pair configuration supports flexible signal routing and polarity inversion. |
| 8, 10 | INA+ / INB− | Noninverting input for A, inverting for B; full differential pairing enables balanced signal acquisition and noise rejection. |
| 11 | V+ | Positive supply terminal (+5V); powers both analog and digital sections; requires tight local decoupling to maintain propagation delay stability. |
Key Features
| Feature | Design Value |
|---|---|
| Stable linear-region operation | Eliminates need for external hysteresis-preserves full input resolution down to DC and enables accurate low-frequency signal discrimination. |
| Independent latch controls (LEA/LEB) | Allows asynchronous or synchronized sampling of two independent signals without cross-talk or shared timing constraints. |
| No minimum input slew-rate requirement | Valid output guaranteed even with slow-moving triangle or ramp inputs-critical for V/F conversion and precision threshold detection. |
| Wide input common-mode range | Extends 200mV below V− (GND) on single supply-enables direct interface with current-sense amplifiers and shunt-based feedback networks. |
| Low power per comparator | 6mA at +5V enables dual-channel high-speed comparison in thermally constrained applications such as portable test equipment. |
Applications
| Switching Regulators | V/F Converters |
|---|---|
|
Use Scenario: Monitoring feedback voltage against reference in DC-DC buck/boost controllers to trigger PWM gate drivers. IC Role / Device Role / Timing Role: Dual comparator provides independent overvoltage and undervoltage detection with simultaneous latching for fault isolation. Use Value: 10ns propagation delay ensures timely response to transient faults; stable linear-region operation prevents false triggering during soft-start ramps. |
Use Scenario: Converting analog sensor output (e.g., temperature, pressure) into proportional frequency for noise-immune transmission. IC Role / Device Role / Timing Role: Precision comparator forms core of relaxation oscillator; low offset voltage (<0.8mV) maintains linearity across full input range. Use Value: No hysteresis required preserves monotonicity; wide common-mode range accommodates rail-to-rail sensor outputs without level shifting. |
| High-Speed Sampling Circuits | Zero-Crossing Detectors |
|
Use Scenario: Capturing fast transient events in oscilloscopes, data loggers, or power quality analyzers using windowed or edge-triggered sampling. IC Role / Device Role / Timing Role: Dual comparator implements independent upper/lower threshold detection with latch synchronization for glitch-free capture. Use Value: Channel-to-channel delay matching (500ps max) ensures precise time-interval measurement; TTL outputs interface directly with FPGA capture logic. |
Use Scenario: Detecting AC line zero crossings in motor drives, lighting controls, or energy metering to synchronize switching or measurement windows. IC Role / Device Role / Timing Role: One comparator channel monitors phase-neutral voltage; second channel provides hysteresis-free crossing detection with minimal phase error. Use Value: Input range extending below GND (–0.2V) enables direct connection to transformer-coupled AC signals; no external biasing needed. |
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 propagation), no latch, open-collector outputs, wider supply range (2–36V), higher offset (2mV). | Suitable for low-speed, cost-sensitive industrial controls where TTL drive and latching are unnecessary. | Select LM393DR only when speed <100kHz and latch function are not required; MAX912ESE+T offers 130× faster response and integrated latching. |
| TLV3501CDR | Faster (4.5ns), rail-to-rail input, CMOS output, no latch, higher quiescent current (8.5mA), narrower common-mode range (V− to V+ − 1.5V). | Better for ultra-high-speed ADC front-ends or laser pulse detection where sub-5ns timing is critical and latch control is handled externally. | Choose TLV3501CDR for >50MHz edge rates; MAX912ESE+T remains preferred when latch synchronization, TTL compatibility, and linear-region stability are mandatory. |
Compared with LM393DR and TLV3501CDR, the MAX912ESE+T uniquely combines 10ns speed, dual independent latches, stable linear-region operation, and true TTL outputs-making it the only option that simultaneously satisfies high-speed sampling, synchronized fault detection, and hysteresis-free precision thresholding in single +5V systems.
Availability
MAX912ESE+T is available at Aetrix Electronics and suitable for switching regulators, V/F converters, high-speed sampling circuits, and zero-crossing detectors requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for MAX912ESE+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) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-speed interface ICs for industrial, communications, and computing applications.
The MAX912ESE+T belongs to Maxim's high-speed precision comparator product line, designed specifically for applications demanding nanosecond-level timing accuracy, latch-controlled sampling, and stable operation without external hysteresis in single- or dual-supply environments.
FAQ
What is the operating temperature range for MAX912ESE+T?
The MAX912ESE+T is specified for operation from –40°C to +85°C, as indicated by the "E" grade suffix in its part number. This extended temperature range makes it suitable for industrial automation, automotive under-hood sensing, and outdoor instrumentation where ambient conditions exceed commercial-grade limits. All electrical specifications-including propagation delay, offset voltage, and supply current-are guaranteed across this full range.
Does MAX912ESE+T require external hysteresis for stable operation?
No, the MAX912ESE+T does not require external hysteresis. Its internal architecture ensures stable output behavior even when input signals dwell in the linear region-unlike many high-speed comparators that oscillate near zero differential voltage. Adding hysteresis would degrade resolution and is explicitly discouraged in the datasheet. The MAX912ESE+T achieves this through proprietary bipolar design and careful biasing, preserving full DC-coupled accuracy.
Can MAX912ESE+T operate from a single +5V supply?
Yes, the MAX912ESE+T supports single +5V operation: connect V− to GND, and apply +5V to V+. In this configuration, the input common-mode range is –0.2V to +3.5V, and outputs remain fully TTL-compatible. The device draws 6mA per comparator under these conditions. For optimal performance, bypass both V+ and V− (GND) with 0.1µF ceramic capacitors placed close to the pins.
What is the function of the LEA and LEB pins on MAX912ESE+T?
The LEA and LEB pins are independent TTL-compatible latch-enable inputs for comparator A and B, respectively. When pulled high or left floating, they freeze the corresponding QA/QA or QB/QB outputs at their last valid state. When driven low, the comparators operate transparently-outputting real-time results based on INA+/INA− or INB+/INB−. This enables synchronized sampling, glitch-free state capture, and independent control of each channel's timing behavior.
How does MAX912ESE+T differ from the single-channel MAX913ESA?
The MAX912ESE+T integrates two independent comparators with separate latch controls (LEA/LEB), while the MAX913ESA contains only one comparator with a single latch enable (LE). Both share identical speed (10ns), offset (0.8mV), and supply characteristics-but the MAX912ESE+T saves board space and reduces component count in dual-threshold applications like window comparators or redundant fault detection. Pin compatibility is not maintained between the two packages (16-pin SO vs. 8-pin SO).
MAX912ESE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- with Latch
- Number of Elements:
- 2
- Output Type:
- Complementary, TTL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 10V
- :
- 2mV @ ±5V
- Voltage - Input Offset (Max):
- 5µA @ ±5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 10mA
- Current - Quiescent (Max):
- 110dB CMRR, 100dB PSRR
- CMRR, PSRR (Typ):
- 14ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 16-SOIC
MAX912ESE+T FAQ
1.How can I place an order for MAX912ESE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX912ESE+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 MAX912ESE+T reliable?
The price and inventory of MAX912ESE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX912ESE+T is usually 5 days.
3.What payment methods are accepted for MAX912ESE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX912ESE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX912ESE+T?
MAX912ESE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX912ESE+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 MAX912ESE+T?
For technical support, including MAX912ESE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX912ESE+T requirements.
6.How does Aetrix verify that MAX912ESE+T is sourced from the original manufacturer or authorized distributors?
All MAX912ESE+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 MAX912ESE+T meets industry standards.
7.What is the process for return or replacement of MAX912ESE+T?
All MAX912ESE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX912ESE+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 MAX912ESE+T part is unused and in its original packaging.
Return procedure for MAX912ESE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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