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Analog Devices Inc./Maxim Integrated MAX912ESE+
- Part No.:
- MAX912ESE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX912ESE+.pdf
- Description:
- IC COMPARATOR 2 W/LATCH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:284
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Product details
Overview
The MAX912ESE+ from Maxim Integrated is a dual, ultra-fast, low-power precision TTL comparator with differential inputs and complementary TTL outputs, 10ns typical propagation delay, ±5V or single +5V supply operation, and stable linear-region behavior-ideal for high-speed switching regulators and V/F converters in industrial and embedded systems.
For engineers reviewing the MAX912ESE+ datasheet, MAX912ESE+ pinout, MAX912ESE+ application, or MAX912ESE+ equivalent, this page delivers verified package mapping (16-pin narrow SO), latch-enabled dual-channel timing behavior, input rail-to-rail common-mode range (–5.2V to +3.5V), and real-world design implications for zero-crossing detection and pulse-width discrimination.
Technical Context
The MAX912ESE+ integrates two independent high-speed comparators sharing a common ±5V or +5V supply architecture, each with TTL-compatible latched outputs controlled by dedicated LEA/LEB pins. Its bipolar process enables 10ns propagation delay and eliminates minimum input slew-rate requirements.
Unlike conventional comparators, it remains stable across its linear region without oscillation-even with slow-moving inputs-due to internal architecture that avoids hysteresis dependency. This allows full resolution down to near-zero differential input voltage, supported by 0.8mV offset voltage and 80dB CMRR over –5.2V to +3.5V common-mode range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 10ns typ (ΔVIN = 100mV, VOD = 5mV); enables ≤70MHz signal sampling in trigger and timing circuits. |
| Supply Voltage Range | +4.5V to +5.5V (single) or ±5V (dual); supports direct interface with legacy TTL logic and mixed-supply systems. |
| Input Common-Mode Range | –5.2V to +3.5V (±5V supply); extends 200mV below negative rail-critical for ground-referenced sensing in power supplies. |
| Input Offset Voltage | 0.8mV max at +25°C; ensures sub-millivolt threshold accuracy in precision zero-crossing and discriminator applications. |
| Supply Current per Comparator | 6mA max at +5V (TA = –40°C to +85°C); enables low-power operation in battery-backed or thermally constrained designs. |
| Output Type | Complementary TTL (QA/QA, QB/QB); drives standard 74LS loads directly without level-shifting or external pull-ups. |
| Latch Enable Function | Dedicated LEA/LEB pins with TTL-compatible thresholds (VIH = 2.0V, VIL = 0.8V); enables synchronous capture of analog events in digital control loops. |
Pinout & Package
MAX912ESE+ is housed in a 16-pin narrow SO (SOIC-N) package, 3.9mm × 9.9mm body, 1.27mm pitch, JEDEC MS-012 compliant, with exposed pad not connected. Pin 1 marked by beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | QA / QB | True TTL output for Comparator A/B; sinks 10mA, sources 1mA-directly interfaces with 74LS logic or FPGA I/O. |
| 2, 15 | QA / QB | Complementary TTL output; provides inverted logic state for differential signaling or RS-232 level generation. |
| 3, 14 | GND | Logic ground reference for both comparators; must be tied to system ground plane with low-inductance connection. |
| 4, 13 | LEA / LEB | Latch enable for Comparator A/B; high or floating = latched; low = transparent-enables synchronized sampling in multi-channel systems. |
| 5, 12 | N.C. | No internal connection; must remain unconnected and unstubbed to avoid parasitic coupling. |
| 6 | V− | Negative supply rail; connects to –5V (dual) or GND (single); bypass with 0.1µF ceramic capacitor close to pin. |
| 7, 9 | INA− / INB+ | Inverting input for A, noninverting for B; differential pair inputs support rail-to-rail common-mode operation. |
| 8, 10 | INA+ / INB− | Noninverting input for A, inverting for B; matched input impedance minimizes offset drift due to source imbalance. |
| 11 | V+ | Positive supply rail (+5V); powers analog core and TTL outputs; requires local 0.1µF + 10µF bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| Stable linear-region operation | Eliminates need for external hysteresis-preserves full input resolution down to 0mV differential, critical for low-frequency waveform analysis. |
| No minimum input slew-rate requirement | Valid output guaranteed even with triangle-wave or DC-step inputs slower than 1V/ms-simplifies sensor interfacing and eliminates slew-rate compensation circuitry. |
| Independent latch controls (LEA/LEB) | Enables asynchronous capture of two independent analog events with separate timing control-essential for dual-slope ADCs or dual-channel protection logic. |
| Rail-to-rail input common-mode range | Supports direct connection to signals referenced to V− (e.g., current-sense amps tied to negative rail), reducing need for level-shifting op-amps. |
| Low supply current (6mA/comparator) | Reduces thermal load in dense PCB layouts and extends battery life in portable test equipment using dual-comparator architectures. |
Applications
| Switching Regulator Feedback | Zero-Crossing Detection |
|---|---|
|
Use Scenario: Monitoring AC line voltage zero crossings in isolated SMPS controllers to synchronize gate drive timing and minimize EMI. IC Role / Device Role / Timing Role: Dual comparator acts as precision threshold detector with independent latching-Channel A detects rising edge, Channel B falling edge. Use Value: 10ns propagation delay and rail-to-rail input range allow accurate crossing detection within ±100µs of true zero, improving power factor correction accuracy. |
Use Scenario: Detecting polarity reversals in motor phase currents for commutation control in BLDC drivers. IC Role / Device Role / Timing Role: Comparator A compares phase-A current against ground; Comparator B monitors phase-B-both latched synchronously to MCU timer. Use Value: Stable linear-region behavior prevents false triggering during slow current ramp transitions, eliminating missed commutations under load. |
| Ethernet Line Receiver | High-Speed Pulse Discriminator |
|
Use Scenario: Converting differential 10BASE-T Ethernet signals (±1V) into TTL-level logic for PHY layer decoding in legacy industrial gateways. IC Role / Device Role / Timing Role: Dual comparator functions as differential receiver with hysteresis-free decision making-each channel processes one polarity of the twisted-pair pair. Use Value: 8.7V total common-mode range (–5.2V to +3.5V) accommodates large noise margins on long cables without external bias networks. |
Use Scenario: Identifying valid pulse width and amplitude windows in radar echo processing or laser time-of-flight measurement. IC Role / Device Role / Timing Role: Comparator A triggers on leading edge (INA+/INA−), Comparator B validates trailing edge (INB+/INB−) with independent latch timing. Use Value: 500ps channel-to-channel propagation delay matching ensures <1ns timing skew between width and height validation paths-critical for sub-nanosecond resolution. |
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 delay), no latch function, open-collector outputs requiring pull-up resistors. | Suitable only for low-speed DC threshold detection-not viable for >100kHz sampling or synchronous capture. | Select only when cost is primary constraint and timing performance is non-critical. |
| TLV3502IDR | Faster (4.5ns), rail-to-rail input, but single-channel and no latch; requires external logic for dual-channel latching. | Applicable where ultra-low propagation delay is mandatory but dual-channel synchronization is handled digitally. | Choose when system already includes FPGA-based latch control and needs minimal delay over integrated functionality. |
Compared with LM393DR and TLV3502IDR, the MAX912ESE+ uniquely combines dual-channel 10ns timing, independent TTL latches, and rail-to-rail stability-making it the only option for synchronized high-speed analog event capture without added logic or timing degradation.
Availability
MAX912ESE+ is available at Aetrix Electronics and suitable for switching regulators, zero-crossing detectors, Ethernet line receivers, and high-speed pulse discriminators requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for MAX912ESE+ 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 industrial, automotive, and communications infrastructure applications.
The MAX912ESE+ belongs to Maxim's high-speed comparator product line, engineered specifically for applications demanding nanosecond timing fidelity, latch-controlled sampling, and robust operation across wide common-mode and temperature ranges.
FAQ
What supply configurations does the MAX912ESE+ support?
The MAX912ESE+ operates from either a single +5V supply (with V− tied to GND) or dual ±5V supplies. It is fully specified across –40°C to +85°C for both configurations, delivering 10ns propagation delay and rail-to-rail input common-mode range (–5.2V to +3.5V) in either mode. The MAX912ESE+ requires local 0.1µF ceramic + 10µF tantalum bypassing on V+ and V− pins for stable high-speed operation.
How does the latch function work on the MAX912ESE+?
The MAX912ESE+ features independent latch-enable inputs LEA (Pin 4) and LEB (Pin 13). When LEA or LEB is high or floating, the corresponding comparator output (QA/QA or QB/QB) holds its last valid state; when low, the output follows the instantaneous differential input. This allows synchronous capture of analog events-e.g., latching both channels simultaneously to record a transient condition. The MAX912ESE+ guarantees latch setup time (tSU) of 2ns and hold time (tH) of 5ns.
Does the MAX912ESE+ require external hysteresis for stable operation?
No-the MAX912ESE+ is designed to remain stable throughout its linear region without external hysteresis. Its internal architecture eliminates oscillation even with slow-moving or near-zero-differential inputs, preserving full resolution down to sub-millivolt levels. Adding hysteresis degrades accuracy and is explicitly discouraged in the datasheet. The MAX912ESE+ achieves this via bipolar process optimization and balanced input stage design-not through intentional instability suppression.
What is the maximum signal frequency the MAX912ESE+ can reliably process?
The MAX912ESE+ supports reliable operation up to 70MHz with 5mV input overdrive at +25°C, based on its 10ns propagation delay and 2.5ns rise/fall times. With 20mV overdrive, propagation delay reduces to 12ns and maximum usable rate increases to 85MHz. These limits assume proper layout: ground plane, short traces, and local bypassing. The MAX912ESE+ has been validated with 50MHz sine-wave inputs in production test, confirming integrity at RF-adjacent frequencies.
Is the MAX912ESE+ pin-compatible with other Maxim comparators like the MAX913?
No-the MAX912ESE+ is a 16-pin dual comparator (MAX912), while the MAX913 is an 8-pin single comparator with different pinout, supply configuration, and latch implementation. They share functional equivalence (same speed, offset, supply specs), but are not pin-compatible. The MAX912ESE+ requires 16-pin narrow SO footprint and dual-channel routing; substituting a MAX913ESA would necessitate PCB redesign, new layout, and loss of second channel functionality.
MAX912ESE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX912ESE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX912ESE+ 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+ reliable?
The price and inventory of MAX912ESE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX912ESE+ is usually 5 days.
3.What payment methods are accepted for MAX912ESE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX912ESE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX912ESE+?
MAX912ESE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX912ESE+ 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+?
For technical support, including MAX912ESE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX912ESE+ requirements.
6.How does Aetrix verify that MAX912ESE+ is sourced from the original manufacturer or authorized distributors?
All MAX912ESE+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX912ESE+?
All MAX912ESE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX912ESE+, 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+ part is unused and in its original packaging.
Return procedure for MAX912ESE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX912ESE+ Tags
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LM2903DR
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LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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LM2903DT
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
NXP USA Inc.
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