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Home > Products > Integrated Circuits (ICs) > Linear > Comparators

Analog Devices Inc./Maxim Integrated MAX970ESD

Name: MAX970ESD
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX970ESD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX970ESD

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Comparators

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: MAX970ESD.pdf

Description:: IC COMPARATOR 4 GEN PUR 14SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MAX970ESD from Maxim Integrated is a quad micropower comparator with rail-to-rail inputs/outputs, no internal reference, and no programmable hysteresis-designed for ultra-low-voltage single-supply operation from +1.6V to +5.5V. It draws only 11–18 µA total supply current (2.75–4.5 µA per comparator), features open-drain outputs capable of sinking beyond VCC up to 6V, and operates across –40°C to +85°C in a 14-pin SO package (S14-4). It is used in 2-cell battery-powered threshold detection where low quiescent current and rail-to-rail input range are critical.

For engineers reviewing the MAX970ESD datasheet, MAX970ESD pinout, MAX970ESD application, or MAX970ESD equivalent, this page delivers verified electrical specs, validated pin functions, confirmed package mapping (14-pin SO), real-world use cases in portable voltage monitoring, and two technically documented alternative parts with explicit functional and application-level differences.

Technical Context

The MAX970ESD implements four independent comparators with rail-to-rail input common-mode range (–0.25V to VCC – 0.25V) and open-drain outputs requiring external pull-up. Its input stage supports operation down to 1.6V supply while maintaining full input range, and its output sink capability degrades gradually below 1.6V but remains functional down to ~1.0V.

Unlike MAX965/967/968/969 variants, MAX970ESD omits both the 1.235V ±1.5% internal reference and HYST pin-eliminating on-chip reference sourcing/sinking and programmable hysteresis. Hysteresis must be added externally via positive feedback, increasing component count and affecting response time versus HYST-enabled variants.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	+1.6V to +5.5V - enables direct use with 2-cell alkaline/NiMH (2.4–3.2V) or Li-ion (3.0–4.2V) batteries without regulation.
Total Supply Current	11 µA (min) to 18 µA (max) at TA = –40°C to +85°C - ensures multi-year battery life in always-on sensing nodes.
Input Common-Mode Range	–0.25V to (VCC – 0.25V) - supports ground-sensing and high-side supply monitoring without level-shifting.
Propagation Delay	10 µs (typical, 50mV overdrive) - sufficient for slow-varying battery voltage or temperature thresholds, not high-speed signal discrimination.
Output Type	Open-drain - allows wired-OR logic, level translation to higher voltages (up to 6V), and flexible pull-up configuration.
Input Offset Voltage	7.0 mV (max, SO package, full temp range) - sets minimum detectable voltage difference in precision threshold applications.
Operating Temperature	–40°C to +85°C - qualified for industrial and extended-temperature portable equipment environments.

Pinout & Package

MAX970ESD is housed in a 14-pin Small Outline (SO) package (package code S14-4), RoHS-compliant, with standard 1.27 mm pitch and 8.65 mm × 3.90 mm body dimensions.

Pin	Circuit Role	Design Meaning
1	OUTA	Comparator A open-drain output - requires external pull-up; sinks current when IN+ < IN−.
2	OUTB	Comparator B open-drain output - independent control; compatible with shared or separate pull-ups.
3	VCC	Positive supply input - accepts +1.6V to +5.5V; decoupling capacitor recommended near pin.
4	INA−	Comparator A inverting input - accepts voltages from –0.25V to (VCC – 0.25V); high-impedance (±5 nA bias).
5	INA+	Comparator A noninverting input - same voltage range and impedance as INA−; differential pair input node.
6	INB−	Comparator B inverting input - electrically identical to INA−; supports dual independent threshold detection.
7	INB+	Comparator B noninverting input - matches INA+ characteristics; enables mirrored or staggered trip points.
8	GND	Analog/digital ground reference - common return for all comparators and supply; must be low-impedance.
9	INC−	Comparator C inverting input - third independent channel; shares same input specs and noise performance.
10	INC+	Comparator C noninverting input - fully rail-to-rail; usable for window or sequential monitoring schemes.
11	IND−	Comparator D inverting input - fourth channel; enables quad-threshold systems (e.g., battery SOC quartiles).
12	IND+	Comparator D noninverting input - supports simultaneous evaluation of four distinct voltage conditions.
13	OUTC	Comparator C open-drain output - independent output; may share pull-up with other channels if logic permits.
14	OUTD	Comparator D open-drain output - final channel output; supports discrete fault signaling or status encoding.

Key Features

Feature	Design Value
Rail-to-rail input common-mode range	Operates with inputs from –0.25V to VCC – 0.25V - eliminates need for input biasing resistors in ground-referenced sensing.
Ultra-low quiescent current	11–18 µA total (2.75–4.5 µA per comparator) - extends battery life in maintenance-free IoT sensors and wearables.
Open-drain outputs with 6V tolerance	Sinks up to 10 mA (typical) with VOUT ≤ 6V - enables direct interfacing to 3.3V, 5V, or mixed-voltage logic domains.
No internal reference or hysteresis	Removes reference loading and simplifies layout - reduces BOM count when external references or fixed hysteresis are preferred.
14-pin SO package (S14-4)	Standard footprint compatible with automated assembly - avoids µMAX/QSOP handling complexity while retaining space efficiency.

Applications

Battery Voltage Monitoring	Multi-Zone Threshold Detection
Use Scenario: Monitoring 2-cell alkaline battery (2.0–3.2V) to trigger low-battery warning, shutdown, or mode change before depletion. IC Role / Device Role / Timing Role: Quad comparator independently compares battery voltage against four preset thresholds (e.g., 3.0V, 2.8V, 2.6V, 2.4V) using resistor dividers. Use Value: Enables granular state-of-charge estimation without microcontroller ADC overhead, reducing system power by >100× vs. polling-based methods.	Use Scenario: Detecting out-of-range conditions across four independent analog signals (e.g., temperature, humidity, pressure, light) in environmental sensor nodes. IC Role / Device Role / Timing Role: Each comparator monitors one sensor's conditioned output against a dedicated reference voltage, asserting fault flags asynchronously. Use Value: Provides immediate, deterministic response to critical events without software latency-critical for safety-critical edge devices.
Ground-Sensing Voltage Discriminator	Low-Voltage Logic-Level Translator
Use Scenario: Detecting undervoltage on a 1.8V I/O rail relative to system ground in FPGA or ASIC power sequencing circuits. IC Role / Device Role / Timing Role: Comparator configured with IN− tied to ground and IN+ monitoring rail; open-drain output pulls up to 3.3V for FPGA-compatible alert signal. Use Value: Achieves accurate sub-2V detection with rail-to-rail input - impossible with standard op-amps or comparators lacking negative input capability.	Use Scenario: Converting 1.6–2.5V sensor output (e.g., from low-power MEMS accelerometer) into clean 0/3.3V logic levels for MCU GPIO input. IC Role / Device Role / Timing Role: Comparator acts as voltage translator with VCC = sensor supply and pull-up to MCU VDD (3.3V); OUT drives MCU interrupt pin. Use Value: Eliminates need for dedicated level-shifter ICs - saves board space and reduces BOM cost in compact wearable designs.

Battery Voltage Monitoring

Multi-Zone Threshold Detection

Use Scenario: Monitoring 2-cell alkaline battery (2.0–3.2V) to trigger low-battery warning, shutdown, or mode change before depletion.

IC Role / Device Role / Timing Role: Quad comparator independently compares battery voltage against four preset thresholds (e.g., 3.0V, 2.8V, 2.6V, 2.4V) using resistor dividers.

Use Value: Enables granular state-of-charge estimation without microcontroller ADC overhead, reducing system power by >100× vs. polling-based methods.

Use Scenario: Detecting out-of-range conditions across four independent analog signals (e.g., temperature, humidity, pressure, light) in environmental sensor nodes.

IC Role / Device Role / Timing Role: Each comparator monitors one sensor's conditioned output against a dedicated reference voltage, asserting fault flags asynchronously.

Use Value: Provides immediate, deterministic response to critical events without software latency-critical for safety-critical edge devices.

Ground-Sensing Voltage Discriminator

Low-Voltage Logic-Level Translator

Use Scenario: Detecting undervoltage on a 1.8V I/O rail relative to system ground in FPGA or ASIC power sequencing circuits.

IC Role / Device Role / Timing Role: Comparator configured with IN− tied to ground and IN+ monitoring rail; open-drain output pulls up to 3.3V for FPGA-compatible alert signal.

Use Value: Achieves accurate sub-2V detection with rail-to-rail input - impossible with standard op-amps or comparators lacking negative input capability.

Use Scenario: Converting 1.6–2.5V sensor output (e.g., from low-power MEMS accelerometer) into clean 0/3.3V logic levels for MCU GPIO input.

IC Role / Device Role / Timing Role: Comparator acts as voltage translator with VCC = sensor supply and pull-up to MCU VDD (3.3V); OUT drives MCU interrupt pin.

Use Value: Eliminates need for dedicated level-shifter ICs - saves board space and reduces BOM cost in compact wearable designs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad comparator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX969EEE	Includes 1.235V ±1.5% internal reference and HYST pin for programmable hysteresis; 16-pin QSOP package.	Reduces external components for reference-based thresholding; supports precise hysteresis tuning without resistor networks.	Select MAX969EEE when reference stability and adjustable hysteresis are required; avoid if board space or BOM simplicity is prioritized.
LM339DR	Quad comparator with ±15V dual-supply or +2V to +36V single-supply range; 2.0 mV max offset; no rail-to-rail inputs; 14-pin SO package.	Higher supply voltage tolerance but limited to 0V–(VCC–1.5V) input range - cannot sense near-ground or above-VCC signals.	Select LM339DR for legacy industrial designs with wide supply margins and no sub-1V sensing needs; avoid for battery-powered rail-to-rail applications.

Compared with MAX970ESD, MAX969EEE adds integrated reference and hysteresis control at the cost of higher quiescent current (14–22 µA) and larger package, while LM339DR offers ruggedness and legacy compatibility but lacks rail-to-rail input capability and ultra-low power - making MAX970ESD optimal for space-constrained, battery-operated systems demanding ground-sensing precision.

Availability

MAX970ESD is available at Aetrix Electronics and suitable for 2-cell battery-powered systems, portable voltage discriminators, and low-power sensor interface circuits requiring stable component supply, long-lifecycle support, and consistent parametric performance across temperature.

Supply support for MAX970ESD 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 power management ICs for industrial, communications, and consumer applications.

The MAX965–MAX970 family was designed specifically for ultra-low-power, rail-to-rail voltage comparison in battery-constrained systems - emphasizing micropower operation (<5 µA/comparator), wide supply range (+1.6V to +5.5V), and robust input/output flexibility.

FAQ

What is the supply voltage range supported by MAX970ESD?

MAX970ESD operates from +1.6V to +5.5V on a single supply. This range supports direct connection to 2-cell alkaline (2.4–3.2V), NiMH (2.0–2.8V), or single Li-ion (3.0–4.2V) batteries without regulation. Operation below 1.6V is possible but degrades propagation delay and output sink strength; the device typically remains functional down to ~1.0V.

Does MAX970ESD include an internal voltage reference?

No, MAX970ESD does not include an internal voltage reference. Unlike MAX965/967/968/969 variants, it omits the 1.235V ±1.5% bandgap reference output (REF pin) and associated reference circuitry. External reference sources must be used for precision thresholding, enabling design flexibility and reduced reference-related noise coupling.

How many comparators does MAX970ESD contain, and what are their output types?

MAX970ESD contains four independent comparators (A–D), each with an open-drain output. All four outputs (OUTA, OUTB, OUTC, OUTD) require external pull-up resistors and can sink current up to 6V beyond ground - supporting wired-OR logic, level translation, and mixed-voltage interfacing without additional components.

Can MAX970ESD be used for ground-sensing applications?

Yes, MAX970ESD supports true ground-sensing due to its rail-to-rail input common-mode range of –0.25V to (VCC – 0.25V). This allows the inverting or noninverting input to be tied directly to ground while the other input monitors a positive voltage - enabling accurate undervoltage detection on low-voltage rails such as 1.8V or lower.

What package type and pin count does MAX970ESD use?

MAX970ESD uses a 14-pin Small Outline (SO) package with package code S14-4. It measures 8.65 mm × 3.90 mm with 1.27 mm lead pitch, is RoHS-compliant, and is compatible with standard surface-mount assembly processes - offering better manufacturability than µMAX or QSOP alternatives while maintaining compact size.

MAX970ESD Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Type:: General Purpose

Number of Elements:: 4

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):: 18µA

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

:: 14-SOIC

MAX970ESD FAQ

1.How can I place an order for MAX970ESD through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX970ESD 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 MAX970ESD reliable?

The price and inventory of MAX970ESD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX970ESD is usually 5 days.

3.What payment methods are accepted for MAX970ESD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX970ESD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX970ESD?

MAX970ESD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX970ESD 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 MAX970ESD?

For technical support, including MAX970ESD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX970ESD requirements.

6.How does Aetrix verify that MAX970ESD is sourced from the original manufacturer or authorized distributors?

All MAX970ESD 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 MAX970ESD meets industry standards.

7.What is the process for return or replacement of MAX970ESD?

All MAX970ESD units undergo pre-shipment inspection (PSI). If there is an issue with MAX970ESD, 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 MAX970ESD part is unused and in its original packaging.

Return procedure for MAX970ESD:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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