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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc./Maxim Integrated MAX1110EPP+

Name: MAX1110EPP+
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX1110EPP+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX1110EPP+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Analog to Digital Converters (ADC)

Package:: 20-DIP (0.300", 7.62mm)

Datasheet:: MAX1110EPP+.pdf

Description:: IC ADC 8BIT SAR 20DIP

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Product details

Overview

MAX1110EPP+ from Maxim Integrated is an 8-bit, 8-channel successive-approximation analog-to-digital converter (ADC) with integrated track/hold, 2.048V internal reference, SPI/QSPI/MICROWIRE-compatible 4-wire serial interface, and software-configurable unipolar/bipolar and single-ended/differential input modes. It operates from a single 2.7V–5.5V supply, draws only 85µA at 50ksps, and targets portable data loggers and hand-held measurement devices requiring low power and multichannel sampling.

For engineers reviewing the MAX1110EPP+ datasheet, MAX1110EPP+ pinout, MAX1110EPP+ application, or MAX1110EPP+ equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with documented differences, and supply support tailored for embedded OEMs and industrial sensor systems.

Technical Context

The MAX1110EPP+ implements a successive-approximation register (SAR) architecture with an on-chip track/hold circuit that acquires signals in ≤1µs and supports up to 50ksps sampling using either its internal 400kHz clock or an external serial clock (50kHz–500kHz). Its analog front-end allows software-selectable 8-channel single-ended or 4-channel differential inputs via an 8-bit control byte, with COM pin defining zero-scale reference.

Conversion results are output MSB-first on DOUT synchronized to SCLK falling edges; SSTRB provides end-of-conversion strobe-low-active in internal clock mode, pulse-high in external clock mode. The device supports automatic power-down (2µA software-triggered, 6µA at 1ksps) and hardware shutdown via SHDN pin, with full wake-up in 12ms (internal reference) or 20µs (external reference).

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	8-bit SAR ADC with no missing codes over temperature - ensures monotonicity and deterministic code transitions in closed-loop control.
Sampling Rate	Up to 50ksps with internal clock or external clock - enables real-time monitoring of fast transients in battery-powered diagnostics.
Total Unadjusted Error	±1 LSB (max), ±0.3 LSB (typ) - guarantees accuracy without factory calibration for cost-sensitive portable instrumentation.
Supply Current	85µA at 50ksps; drops to 6µA in power-down at 1ksps - extends battery life in solar-powered remote sensors beyond 5 years.
Reference Voltage	Internal 2.048V ±0.5% (REFOUT), or external 1V–VDD - eliminates need for external precision reference in space-constrained designs.
Input Configuration	8 single-ended or 4 pseudo-differential channels (software-selectable via control byte) - supports flexible signal routing without external multiplexers.
Serial Interface	SPI/QSPI/MICROWIRE-compatible 4-wire interface (CS, SCLK, DIN, DOUT) with SSTRB strobe - simplifies integration with ARM Cortex-M and legacy 8-bit microcontrollers.

Pinout & Package

The MAX1110EPP+ is housed in a 20-pin SSOP package (body size 7.2mm × 5.3mm, 0.65mm pitch), optimized for high-density PCB layouts in handheld instruments.

Pin	Circuit Role	Design Meaning
1–4, 5–8	Analog Input Channels CH0–CH7	Software-mapped single-ended inputs or differential pairs (CH0/CH1, CH2/CH3, etc.) - enables simultaneous multi-sensor acquisition with shared COM reference.
9	COM	Common-mode reference for single-ended mode; sets zero-code voltage - must be stable to ±0.5 LSB, typically tied to AGND or VREFIN/2 for bipolar operation.
10	SHDN	Three-level shutdown control: high-Z = active, DGND = 10µA power-down, VDD = reference disabled - allows dynamic power gating without external logic.
11	REFIN	Analog reference input - connect to REFOUT for internal 2.048V reference or to external source (1V–VDD) for custom full-scale range.
12	REFOUT	2.048V reference output - requires 1µF bypass capacitor to AGND for stability and noise rejection during conversion.
13	AGND	Analog ground - separate from DGND to minimize digital switching noise coupling into sensitive analog front-end.
14	DGND	Digital ground - return path for CS, SCLK, DIN, DOUT, and SSTRB; must be connected to AGND at single point near device.
15	DOUT	Serial data output - three-state, MSB-first, clocked on SCLK falling edge; high-impedance when CS is high.
16	SSTRB	Serial strobe output - indicates end-of-conversion: low-active in internal clock mode, two-cycle pulse in external clock mode - drives interrupt lines directly.
17	DIN	Serial data input - accepts control byte (8 bits) on SCLK rising edge; tolerant to 5.5V inputs regardless of VDD.
18	CS	Active-low chip select - enables serial interface and controls DOUT/SSTRB output state; voltage-tolerant up to 5.5V.
19	SCLK	Serial clock input - clocks data in/out and governs conversion speed in external clock mode; 5.5V-tolerant, 45–55% duty cycle required.
20	VDD	Positive supply - powers analog and digital sections from 2.7V to 5.5V; PSR of ±4mV ensures immunity to supply ripple in noisy environments.

Key Features

Feature	Design Value
Single 2.7V–5.5V supply	Eliminates dual-rail power design complexity and reduces BOM count in 3.3V/5V mixed-signal systems.
Internal 2.048V reference	Provides stable, factory-trimmed reference without external components - saves PCB area and improves long-term drift performance.
Software-configurable input modes	Unipolar/bipolar and single-ended/differential selection via control byte bits - enables one firmware build to support multiple sensor types.
2µA software power-down	Reduces average current to sub-µA levels in duty-cycled data loggers - extends coin-cell battery life by >10× versus always-on operation.
±1 LSB total unadjusted error	Meets accuracy requirements for Class I medical instruments and industrial process monitoring without post-fabrication trimming.
SPI/QSPI/MICROWIRE compatibility	Interoperates with standard microcontroller peripherals - avoids custom driver development and accelerates prototyping.

Applications

Portable Data Logging	Hand-Held Measurement Devices
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and CO₂ every 10 seconds. IC Role / Device Role / Timing Role: 8-channel ADC digitizing analog outputs from four analog sensors plus two auxiliary inputs for supply monitoring and calibration references. Use Value: 85µA active current and 6µA power-down enable >3-year operation on two AA alkaline cells while maintaining 50ksps burst capability for transient capture.	Use Scenario: Pocket-sized multimeter with auto-ranging voltage, current, and resistance measurement. IC Role / Device Role / Timing Role: Core ADC acquiring multiplexed analog front-end signals under microcontroller control, using COM-referenced single-ended mode for DCV and differential mode for low-level mV ranges. Use Value: Internal 2.048V reference and ±1 LSB TUE eliminate need for external voltage reference IC, reducing bill-of-materials and board area by 30%.
Medical Instruments	Solar-Powered Remote Systems
Use Scenario: Portable ECG monitor capturing lead-I, II, III signals with patient isolation and motion artifact rejection. IC Role / Device Role / Timing Role: Pseudo-differential ADC sampling electrode pairs (CH0/CH1, CH2/CH3) with COM tied to right-leg drive reference to reject common-mode interference. Use Value: 800kHz small-signal bandwidth and <1µs acquisition time support accurate R-wave detection even during high-frequency muscle noise.	Use Scenario: Off-grid weather station transmitting wind speed, solar irradiance, and battery voltage via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Low-power ADC powering up only during sensor readout windows, using SHDN pin to gate VDD to analog section and reduce leakage. Use Value: 12ms wake-up time from internal reference and 20µs from external reference allow rapid sampling bursts without sacrificing energy efficiency in intermittent operation.

Portable Data Logging

Hand-Held Measurement Devices

Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and CO₂ every 10 seconds.

IC Role / Device Role / Timing Role: 8-channel ADC digitizing analog outputs from four analog sensors plus two auxiliary inputs for supply monitoring and calibration references.

Use Value: 85µA active current and 6µA power-down enable >3-year operation on two AA alkaline cells while maintaining 50ksps burst capability for transient capture.

Use Scenario: Pocket-sized multimeter with auto-ranging voltage, current, and resistance measurement.

IC Role / Device Role / Timing Role: Core ADC acquiring multiplexed analog front-end signals under microcontroller control, using COM-referenced single-ended mode for DCV and differential mode for low-level mV ranges.

Use Value: Internal 2.048V reference and ±1 LSB TUE eliminate need for external voltage reference IC, reducing bill-of-materials and board area by 30%.

Medical Instruments

Solar-Powered Remote Systems

Use Scenario: Portable ECG monitor capturing lead-I, II, III signals with patient isolation and motion artifact rejection.

IC Role / Device Role / Timing Role: Pseudo-differential ADC sampling electrode pairs (CH0/CH1, CH2/CH3) with COM tied to right-leg drive reference to reject common-mode interference.

Use Value: 800kHz small-signal bandwidth and <1µs acquisition time support accurate R-wave detection even during high-frequency muscle noise.

Use Scenario: Off-grid weather station transmitting wind speed, solar irradiance, and battery voltage via LoRaWAN every 15 minutes.

IC Role / Device Role / Timing Role: Low-power ADC powering up only during sensor readout windows, using SHDN pin to gate VDD to analog section and reduce leakage.

Use Value: 12ms wake-up time from internal reference and 20µs from external reference allow rapid sampling bursts without sacrificing energy efficiency in intermittent operation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit multichannel ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADS7822U	8-bit, 4-channel, SPI-only interface; no internal reference; requires external 2.5V ref; 1.25mW typical power at 50ksps.	Lacks bipolar mode and software-configurable differential inputs; limited to single-ended sensing with external reference dependency.	Select when board space permits external reference and system uses only 4 channels - lower cost but higher design overhead.
MAX1113EUA+	8-bit, 4-channel, same family; 16-pin µMAX package; identical internal reference and power-down; no CH4–CH7 pins.	Halves channel count and removes 4 extra analog inputs - suitable for compact designs where 4 channels suffice.	Choose for footprint reduction and identical performance where full 8-channel capability is unnecessary - drop-in replacement for CH0–CH3 use cases.

Compared with ADS7822U and MAX1113EUA+, the MAX1110EPP+ uniquely delivers 8 software-configurable channels with integrated 2.048V reference and bipolar support in a single SSOP package - making it optimal for space-constrained, battery-operated systems requiring maximum channel density and minimal external components.

Availability

MAX1110EPP+ is available at Aetrix Electronics and suitable for portable data logging, hand-held measurement devices, and medical instruments requiring stable component supply across extended production lifecycles.

Supply support for MAX1110EPP+ 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 demanding industrial, medical, and automotive applications - emphasizing low power, high accuracy, and robust integration.

The MAX1110EPP+ belongs to Maxim's low-power serial ADC product line, engineered specifically for battery-operated instrumentation where channel count, supply flexibility, and reference integration are critical to system-level size and runtime.

FAQ

What is the maximum sampling rate of the MAX1110EPP+ and how is it achieved?

The MAX1110EPP+ achieves a maximum sampling rate of 50ksps using its internal 400kHz clock or an external serial clock up to 500kHz. In external clock mode, conversion timing is governed by the SCLK frequency and control byte format; in internal clock mode, the device self-times conversions and allows flexible readout timing. This dual-clock architecture ensures reliable operation across diverse microcontroller platforms without tight timing constraints on the host processor.

Does the MAX1110EPP+ support bipolar input measurements, and if so, how is it configured?

Yes, the MAX1110EPP+ supports bipolar input measurements through software configuration of the UNI/BIP bit (bit 3) in the 8-bit control byte. When UNI/BIP = 0 and SGL/DIF = 0, the device operates in bipolar differential mode with a full-scale range of ±VREFIN/2. COM must be set to VREFIN/2 (e.g., 1.024V when using internal reference) to establish the correct common-mode voltage - enabling accurate AC-coupled signal acquisition such as audio or ECG waveforms.

How does the power-down mode function on the MAX1110EPP+, and what are its current savings?

The MAX1110EPP+ offers two power-down methods: software-triggered (PD1/PD0 bits in control byte) and hardware-controlled (SHDN pin). Software power-down reduces supply current to 2µA; at 1ksps sampling, current drops to 6µA. Pulling SHDN to DGND cuts current to ≤10µA. These modes preserve register state and allow sub-millisecond wake-up - critical for duty-cycled sensor nodes where the MAX1110EPP+ spends >99% of time in low-power states while maintaining responsiveness.

Can the MAX1110EPP+ interface directly with a 3.3V microcontroller SPI peripheral, and what voltage tolerances apply?

Yes, the MAX1110EPP+ interfaces directly with 3.3V microcontrollers: its CS, SCLK, and DIN inputs tolerate voltages up to 5.5V regardless of VDD, allowing seamless connection to both 3.3V and 5V logic families. DOUT and SSTRB are CMOS-compatible with VDD-referenced output levels, and the device operates down to 2.7V - ensuring reliable communication without level shifters in mixed-voltage systems where the MAX1110EPP+ serves as the analog bridge.

What is the role of the COM pin on the MAX1110EPP+, and how should it be connected in different input modes?

The COM pin on the MAX1110EPP+ serves as the zero-scale reference for single-ended inputs and the common-mode point for differential measurements. In unipolar single-ended mode, COM is tied to AGND; in bipolar mode, it is set to VREFIN/2 (e.g., 1.024V) using a resistor divider or buffer. For differential operation, COM remains at VREFIN/2 to center the input range - improper COM biasing causes gain/offset errors exceeding ±1 LSB, directly impacting the MAX1110EPP+'s specified accuracy.

MAX1110EPP+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 20-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Number of Bits:: 8

Sampling Rate (Per Second):: 50k

Number of Inputs:: 4, 8

Input Type:: Differential, Single Ended

Data Interface:: SPI

Configuration:: MUX-S/H-ADC

Ratio - S/H:ADC:: 1:1

Number of A/D Converters:: 1

Architecture:: SAR

Reference Type:: External, Internal

Voltage - Supply, Analog:: 2.7V ~ 5.5V

Voltage - Supply, Digital:: 2.7V ~ 5.5V

Features:: -

Operating Temperature:: -40°C ~ 85°C

Supplier Device Package:: 20-PDIP

Mounting Type:: Through Hole

Grade:: -

Qualification:: -

MAX1110EPP+ FAQ

1.How can I place an order for MAX1110EPP+ through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX1110EPP+ 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 MAX1110EPP+ reliable?

The price and inventory of MAX1110EPP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1110EPP+ is usually 5 days.

3.What payment methods are accepted for MAX1110EPP+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1110EPP+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX1110EPP+?

MAX1110EPP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX1110EPP+ 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 MAX1110EPP+?

For technical support, including MAX1110EPP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1110EPP+ requirements.

6.How does Aetrix verify that MAX1110EPP+ is sourced from the original manufacturer or authorized distributors?

All MAX1110EPP+ 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 MAX1110EPP+ meets industry standards.

7.What is the process for return or replacement of MAX1110EPP+?

All MAX1110EPP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1110EPP+, 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 MAX1110EPP+ part is unused and in its original packaging.

Return procedure for MAX1110EPP+:

1.Submit a request within 90 days.

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

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