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Analog Devices Inc./Maxim Integrated MAX966ESA+
- Part No.:
- MAX966ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX966ESA+.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,213
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Product details
Overview
MAX966ESA+ from Maxim Integrated is a dual micropower comparator with rail-to-rail inputs and open-drain outputs, operating from +1.6V to +5.5V single supply, drawing 6.0–10.0 µA per comparator (typical 7.0 µA at +25°C), and featuring -0.25V to VCC input common-mode range. It is designed for ultra-low-voltage 2-cell battery-powered systems requiring precise threshold detection without internal reference or programmable hysteresis.
For engineers reviewing the MAX966ESA+ datasheet, MAX966ESA+ pinout, MAX966ESA+ application, or MAX966ESA+ equivalent, this page delivers verified electrical specs, SO-8 package layout, dual-comparator timing behavior, and validated alternatives for portable voltage monitoring, window detection, and level translation designs.
Technical Context
The MAX966ESA+ implements two independent comparators with fully differential rail-to-rail input stages capable of operation down to +1.6V supply, where input common-mode extends from -0.25V to (VCC – 0.25V) over full temperature range. Its open-drain outputs support pull-up voltages up to +6.0V, enabling voltage-level translation across disparate supply domains.
No internal reference or HYST pin is present-unlike MAX965/967/968-so external hysteresis requires three-resistor positive feedback. Propagation delay is 10 µs (50 mV overdrive) and output low voltage is 0.2 V at 100 µA sink load under 1.6–2.7 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.6V to +5.5V - supports direct operation from 2-cell alkaline or Li-ion batteries without regulation. |
| Supply Current per Comparator | 6.0–10.0 µA - enables multi-year battery life in always-on sensing nodes. |
| Input Common-Mode Range | -0.25V to (VCC – 0.25V) - allows detection below ground and near-rail thresholds in low-voltage systems. |
| Propagation Delay | 10 µs @ 50 mV overdrive - suitable for slow-to-moderate speed monitoring (e.g., battery voltage sag, supply brownout). |
| Output Type | Open-drain - permits wired-OR logic, level shifting to higher rails (up to +6V), and flexible pull-up selection. |
| Input Offset Voltage | 7.0 mV (SO package, full temp range) - sets minimum detectable differential for precision thresholding. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and portable outdoor equipment environments. |
Pinout & Package
MAX966ESA+ is housed in an 8-pin SO (Small Outline) package (package code S8-2), RoHS-compliant, with standard 1.27 mm pitch and 5.0 mm × 6.2 mm body size.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Open-drain output of comparator A - requires external pull-up; sinks current when active low. |
| 2 | GND | Analog/digital ground reference - must be low-impedance connection for stable comparison. |
| 3 | N.C. | No internal connection - left unconnected; not used for signal or bypass. |
| 4 | INA− | Inverting input of comparator A - accepts signals within -0.25V to (VCC – 0.25V). |
| 5 | INA+ | Noninverting input of comparator A - differential pair input with rail-to-rail common-mode capability. |
| 6 | INB− | Inverting input of comparator B - electrically identical to INA−; independent channel. |
| 7 | INB+ | Noninverting input of comparator B - supports separate threshold configuration from comparator A. |
| 8 | VCC | Positive supply pin - powers both comparators; decoupling capacitor recommended at pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Enables accurate threshold detection at sub-100mV margins near supply rails or ground in 1.6V systems. |
| Ultra-low quiescent current | 7.0 µA typical per comparator allows integration into energy-harvesting or coin-cell-powered devices. |
| Open-drain output architecture | Supports mixed-voltage interfacing (e.g., 1.8V comparator driving 3.3V or 5V logic) without level-shifter ICs. |
| Wide supply voltage range | +1.6V to +5.5V operation eliminates need for LDO pre-regulation in multi-battery configurations. |
| Robust input fault tolerance | Withstands continuous short-circuit to either rail - simplifies protection design in noisy industrial environments. |
Applications
| Battery Voltage Monitor | Window Comparator |
|---|---|
Use Scenario: Monitoring 2-cell alkaline battery discharge from 3.2V to 1.8V to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Dual comparator independently compares battery voltage against upper and lower thresholds using resistor dividers. Use Value: Enables precise, low-power state-of-charge estimation without microcontroller intervention or reference IC. | Use Scenario: Validating that a sensor output remains within safe operational bounds (e.g., 1.0V–2.5V) in medical wearable devices. IC Role / Device Role / Timing Role: One comparator detects upper limit breach; the other detects lower limit breach - outputs combined via OR logic. Use Value: Provides fail-safe envelope checking with <10 µA total supply current, extending wearable runtime. |
| Supply Rail Supervisor | Voltage-Level Translator |
Use Scenario: Detecting brownout on a +3.3V microcontroller supply during cold temperature startup. IC Role / Device Role / Timing Role: Comparator A monitors VCC against fixed 3.0V threshold derived from resistive divider; output drives reset line. Use Value: Guarantees reliable MCU reset initiation at 3.0V ±7 mV accuracy, even at -40°C ambient. | Use Scenario: Converting a 1.8V logic signal from an ultra-low-power sensor to drive a 5V actuator control input. IC Role / Device Role / Timing Role: Comparator compares 1.8V signal to 1.0V reference; open-drain output pulled to 5V. Use Value: Eliminates discrete MOSFET translator, reducing BOM count while maintaining <10 µs response latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV393IDR | Higher supply current (40 µA/comparator), wider supply range (+2.7V to +5.5V), no sub-2V operation. | Not suitable for 1.6–2.0V battery systems; better for 3.3V/5V-only designs with higher speed needs (400 ns propagation). | Select LMV393IDR only when operating above +2.7V and higher speed or rail-to-rail output swing is required. |
| TLV3702CDR | Lower supply current (1.3 µA/comparator), but narrower input common-mode (0.2V below VCC), no sub-1.8V operation. | Optimized for ultra-low-power 3V systems; lacks true rail-to-rail input - cannot monitor near-GND or near-VCC accurately. | Choose TLV3702CDR for longest battery life in >2.7V applications where input range above GND suffices. |
Compared with LMV393IDR and TLV3702CDR, MAX966ESA+ uniquely supports 1.6V operation with rail-to-rail inputs and 7 µA consumption - making it the only option for precision 2-cell battery monitoring below 2.0V.
Availability
MAX966ESA+ is available at Aetrix Electronics and suitable for battery voltage monitoring, supply supervision, window detection, and voltage-level translation requiring stable component supply across industrial, portable, and medical device programs.
Supply support for MAX966ESA+ 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 power management ICs for demanding industrial, automotive, and communications applications.
The MAX965–MAX970 family targets ultra-low-power, rail-to-rail comparator applications in space-constrained, battery-operated systems where supply voltage may dip below 2.0V.
FAQ
What is the minimum operating voltage for MAX966ESA+?
The MAX966ESA+ is fully specified from +1.6V to +5.5V. While comparator functionality may persist down to +1.0V, performance degrades: propagation delay increases, output sink capability falls, and input common-mode range remains rail-to-rail but reference-free operation limits precision. For guaranteed specifications, use ≥+1.6V.
Does MAX966ESA+ include an internal voltage reference?
No, MAX966ESA+ does not include an internal voltage reference. Unlike MAX965/967/968/969, it omits the REF and HYST pins. Thresholds must be supplied externally via resistor dividers or precision references. This reduces cost and die area while retaining dual-comparator functionality.
How is hysteresis implemented on MAX966ESA+?
Hysteresis on MAX966ESA+ requires external positive feedback using three resistors (R1, R2, R3) per comparator, as detailed in Figure 4 of the datasheet. Unlike HYST-pin devices, this method draws additional current and slows response, but provides full design flexibility for custom trip points and hysteresis bands up to ±50mV.
What is the maximum allowable pull-up voltage on the open-drain outputs of MAX966ESA+?
The MAX966ESA+ open-drain outputs tolerate up to +6.0V on the pull-up rail, independent of VCC. This allows level translation from low-voltage domains (e.g., 1.8V supply) to higher logic families (e.g., 5V TTL) without additional components - provided the output sink current stays within rated limits.
Can MAX966ESA+ operate with inputs below ground?
Yes, MAX966ESA+ supports an input common-mode voltage as low as -0.25V relative to GND across its full temperature range. This enables ground-referenced negative signal detection (e.g., current-sense amplifier outputs) without level-shifting circuitry - a key advantage in low-voltage sensor interfaces.
MAX966ESA+ 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:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Drain, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.6V ~ 5.5V
- :
- 7mV @ 5.5V
- Voltage - Input Offset (Max):
- 0.05µA @ 5.5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 10µA
- Current - Quiescent (Max):
- 56.48dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 20µs
- Propagation Delay (Max):
- ±1mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX966ESA+ FAQ
1.How can I place an order for MAX966ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX966ESA+ 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 MAX966ESA+ reliable?
The price and inventory of MAX966ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX966ESA+ is usually 5 days.
3.What payment methods are accepted for MAX966ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX966ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX966ESA+?
MAX966ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX966ESA+ 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 MAX966ESA+?
For technical support, including MAX966ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX966ESA+ requirements.
6.How does Aetrix verify that MAX966ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX966ESA+ 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 MAX966ESA+ meets industry standards.
7.What is the process for return or replacement of MAX966ESA+?
All MAX966ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX966ESA+, 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 MAX966ESA+ part is unused and in its original packaging.
Return procedure for MAX966ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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