My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX968ESA-T
- Part No.:
- MAX968ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX968ESA-T.pdf
- Description:
- IC COMPARATOR 2 WINDW 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,252
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX968ESA-T from Maxim Integrated is a dual micropower comparator with rail-to-rail inputs/outputs, 1.235V ±1.5% internal reference, programmable hysteresis, and operation down to +1.6V single supply. It draws 10–16 µA per comparator (typ. 13 µA), features open-drain outputs swingable beyond VCC to 6V, and targets ultra-low-voltage battery monitoring and window detection in portable systems.
For engineers reviewing the MAX968ESA-T datasheet, MAX968ESA-T pinout, MAX968ESA-T application, or MAX968ESA-T equivalent, key selection criteria include its dual-channel configuration with shared hysteresis control, precision reference accuracy over -40°C to +85°C, rail-to-rail input common-mode range (-0.25V to VCC – 0.25V), and compatibility with 2-cell alkaline/NiMH battery-powered designs requiring <5 µA/channel quiescent current.
Technical Context
The MAX968ESA-T implements two independent comparators in a single 8-pin SO package, each with rail-to-rail input stage enabling full-supply-range sensing and open-drain output stage supporting voltage-level translation up to 6V. Its internal 1.235V bandgap reference is buffered and accessible on pin 7, with ±1.5% accuracy over 0°C to +85°C and ±2.5% over -40°C to +85°C.
Hysteresis is programmable via the HYST pin (pin 6) using external resistors between REF and GND, enabling adjustable hysteresis bands from ±1 mV to ±50 mV; this configuration applies identically to both comparators, making it suitable for matched window comparator topologies without external component duplication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.6V to +5.5V - supports direct 2-cell alkaline (up to 3.2V) or Li-ion (3.0–3.7V) battery operation without regulation. |
| Quiescent Current per Comparator | 10 µA (min) to 16 µA (max) at -40°C to +85°C - enables multi-year battery life in always-on sensor monitors. |
| Input Offset Voltage | 4.0 mV (max, 0°C to +85°C, µMAX/SO) - ensures reliable threshold detection within ±20 mV windows at 3V supply. |
| Propagation Delay | 10 µs (typ., 50 mV overdrive) - sufficient for slow-varying battery voltage or temperature monitoring signals. |
| Reference Voltage Accuracy | ±1.5% (0°C to +85°C), ±2.5% (-40°C to +85°C) - provides stable trip-point calibration across commercial/industrial temperature ranges. |
| Input Common-Mode Range | -0.25V to VCC – 0.25V - allows direct sensing of ground-referenced or rail-referenced signals without level-shifting circuitry. |
| Output Sink Capability | 100 µA @ 0.2V VOL (1.6–2.7V VCC); 500 µA @ 0.4V VOL (2.7–5.5V VCC) - drives standard pull-up resistors (e.g., 100 kΩ to 5V) with low dropout. |
Pinout & Package
MAX968ESA-T is housed in an 8-pin SO (Small Outline) package (package code S8-2), measuring 4.9 mm × 6.0 mm × 1.75 mm, RoHS-compliant, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Open-drain output of Comparator A - requires external pull-up; sinks current when IN+ > IN−; compatible with 1.6–6V logic levels. |
| 2 | VCC | Positive supply input - accepts +1.6V to +5.5V; powers both comparators and internal reference. |
| 3 | INB+ | Inverting input of Comparator B - used as high-threshold input in window comparator configurations. |
| 4 | INB− | Noninverting input of Comparator B - used as low-threshold input in window comparator configurations. |
| 5 | INA− | Inverting input of Comparator A - primary signal input for first comparison channel. |
| 6 | HYST | Hysteresis programming input - connects to REF/GND divider to set identical hysteresis for both comparators (±1–50 mV). |
| 7 | REF | Buffered 1.235V reference output - sources up to 50 µA; bypass with 0.1 µF capacitor for noise reduction. |
| 8 | GND | Analog/digital ground reference - must be low-impedance connection; shared return for all internal circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates from -0.25V to VCC – 0.25V - enables direct measurement of signals referenced to ground or supply rails without attenuation or biasing. |
| Programmable hysteresis (shared) | Single HYST pin configures identical hysteresis for both comparators - simplifies window comparator design and eliminates mismatch-induced trip-point drift. |
| Internal 1.235V ±1.5% reference | Stable, buffered reference available on dedicated pin - removes need for external voltage reference IC or resistor divider in threshold-setting applications. |
| Ultra-low quiescent current | 10–16 µA per comparator across full temperature range - extends battery life in energy-constrained IoT sensors and wearables. |
| Open-drain outputs with 6V tolerance | Outputs sink current while tolerating up to 6V on drain node - supports level translation between 1.8V/3.3V domains and 5V logic or microcontroller I/O. |
Applications
| Battery Voltage Monitor | Window Comparator |
|---|---|
|
Use Scenario: Monitoring 2-cell alkaline battery (2.0–3.2V) to trigger low-battery warning before system brownout. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against upper (e.g., 2.8V) and lower (e.g., 2.2V) thresholds derived from internal 1.235V reference. Use Value: Eliminates external reference and reduces BOM count by 3 components versus discrete solution; hysteresis prevents chatter near trip points. |
Use Scenario: Detecting valid analog sensor output (e.g., thermistor voltage) within safe operating bounds in medical handheld devices. IC Role / Device Role / Timing Role: Configured as window comparator with shared HYST pin - one comparator checks upper limit, the other lower limit, both referenced to same REF. Use Value: Matched hysteresis ensures symmetrical noise immunity on both thresholds; rail-to-rail inputs accept full 0–3.3V sensor range without scaling. |
| Voltage-Level Translator | Supply-Sensing Circuit |
|
Use Scenario: Converting 1.8V logic-level enable signal to 5V-compatible output for driving external peripherals in mixed-voltage systems. IC Role / Device Role / Timing Role: Single comparator channel used with REF as threshold; open-drain output pulled to 5V rail. Use Value: No level-shifter IC required; operates reliably at 1.6V supply, enabling translation even during brownout conditions. |
Use Scenario: Detecting presence/absence of auxiliary 3.3V supply in industrial controller to enable/disable subsystems. IC Role / Device Role / Timing Role: Comparator A monitors 3.3V rail vs. REF; Comparator B monitors ground integrity via sense resistor - both share hysteresis for noise rejection. Use Value: Dual-channel integration reduces PCB area by 40% vs. two separate comparators; internal reference ensures consistent trip points across channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX967ESA | Identical pinout, same 1.235V reference and programmable hysteresis, but configured as dual voltage monitor (common IN−, separate IN+ inputs). | Optimized for dual-rail monitoring (e.g., VCC and VBAT), not independent signal windowing. | Select MAX967ESA if monitoring two separate supply rails with shared threshold; choose MAX968ESA-T for independent signal windowing with matched hysteresis. |
| TLV3702IDR | No internal reference; rail-to-rail I/O; 1.8V min supply; 850 nA typical supply current; no hysteresis pin - requires external feedback network. | Lower power but higher design complexity; lacks integrated reference and programmable hysteresis. | Choose TLV3702IDR only when sub-µA quiescent current is mandatory and board space permits external hysteresis resistors and reference. |
Compared with MAX967ESA and TLV3702IDR, the MAX968ESA-T uniquely combines dual independent comparators, shared programmable hysteresis, and a precision internal reference in an 8-pin SO package - delivering lowest component count for window comparator implementations in battery-powered systems.
Availability
MAX968ESA-T is available at Aetrix Electronics and suitable for battery voltage monitoring, window detection, voltage-level translation, and supply-sensing applications requiring stable component supply across industrial temperature ranges and long-lifecycle production programs.
Supply support for MAX968ESA-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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX965–MAX970 family was engineered specifically for ultra-low-power, single-supply, rail-to-rail comparator applications in portable and battery-operated equipment where supply headroom is constrained below 2V.
FAQ
What is the maximum supply voltage rating for MAX968ESA-T?
The MAX968ESA-T has an absolute maximum supply voltage (VCC) rating of +6V. However, its specified operating range is +1.6V to +5.5V. Operation above +5.5V voids guaranteed performance and may cause permanent damage. For robust 5V-system interfacing, the device's open-drain outputs tolerate up to +6V on the drain node - enabling safe level translation to 5V logic while powered from lower supplies like 3.3V or 2.0V.
Does MAX968ESA-T support true rail-to-rail input operation across its full temperature range?
Yes, the MAX968ESA-T supports rail-to-rail input common-mode voltage from -0.25V to VCC – 0.25V across its full operating temperature range of -40°C to +85°C. This means both inputs can be driven to within 0.25V of either supply rail (GND or VCC) while maintaining correct comparator functionality - critical for direct sensing of battery voltages or ground-referenced sensor outputs without external bias networks.
How is hysteresis programmed on MAX968ESA-T, and does it apply to both comparators?
Hysteresis on the MAX968ESA-T is programmed using the HYST pin (pin 6) connected to a resistor divider between REF (pin 7) and GND. The resulting hysteresis band (±1 mV to ±50 mV) applies identically to both comparators - a key differentiator from generic dual comparators. This shared hysteresis ensures matched noise immunity and eliminates threshold mismatch in window comparator configurations, reducing design risk and component count.
Can MAX968ESA-T operate from a 1.5V supply, and what performance degrades?
The MAX968ESA-T is specified for operation down to +1.6V. At 1.5V, the internal reference ceases to regulate (falls below 1.2V), and comparator propagation delay increases significantly (>50 µs), while output sink capability drops. Input common-mode range remains rail-to-rail, but the device is not guaranteed functional. For reliable operation, maintain VCC ≥ +1.6V - e.g., use fresh 2-cell alkaline (3.0V) or regulated 1.8V/2.5V supplies.
What is the purpose of the REF pin on MAX968ESA-T, and how should it be bypassed?
The REF pin (pin 7) delivers the buffered 1.235V ±1.5% internal reference voltage, capable of sourcing up to 50 µA. To minimize reference noise (which contributes ~1.0 mVpp to comparator decision uncertainty), it must be bypassed with a 0.1 µF ceramic capacitor placed as close as possible to the pin and GND. Omitting this capacitor increases susceptibility to supply ripple and crosstalk, potentially causing false triggering in precision threshold applications.
MAX968ESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Window
- 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):
- 16µA
- 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
MAX968ESA-T FAQ
1.How can I place an order for MAX968ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX968ESA-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 MAX968ESA-T reliable?
The price and inventory of MAX968ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX968ESA-T is usually 5 days.
3.What payment methods are accepted for MAX968ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX968ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX968ESA-T?
MAX968ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX968ESA-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 MAX968ESA-T?
For technical support, including MAX968ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX968ESA-T requirements.
6.How does Aetrix verify that MAX968ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX968ESA-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 MAX968ESA-T meets industry standards.
7.What is the process for return or replacement of MAX968ESA-T?
All MAX968ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX968ESA-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 MAX968ESA-T part is unused and in its original packaging.
Return procedure for MAX968ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX968ESA-T 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…
