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Analog Devices Inc./Maxim Integrated MAX1113EEE+
- Part No.:
- MAX1113EEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1113EEE+.pdf
- Description:
- IC ADC 8BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,749
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Product details
Overview
The MAX1113EEE+ from Maxim Integrated is a low-power, 4-channel, 8-bit successive-approximation analog-to-digital converter (ADC) with integrated track/hold, 4.096V internal reference, SPI/QSPI/MICROWIRE-compatible serial interface, and software-configurable unipolar/bipolar and single-ended/differential input modes. It operates from a single 4.5V–5.5V supply, draws only 135µA at 50ksps, and supports industrial temperature range (–40°C to +85°C) in a 16-pin QSOP package.
For engineers reviewing the MAX1113EEE+ datasheet, MAX1113EEE+ pinout, MAX1113EEE+ application, or MAX1113EEE+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in portable instrumentation and remote data acquisition, and two validated alternative parts with documented functional and application-level differences.
Technical Context
The MAX1113EEE+ implements a successive-approximation register (SAR) architecture with an on-chip track/hold circuit enabling up to 50ksps sampling. Conversion timing is governed by either the internal 400kHz clock or an external serial clock (50kHz–500kHz), with full conversion requiring 10 clock cycles in external mode or fixed 25µs in internal mode.
Its analog front end supports four single-ended or two pseudo-differential input channels, with common-mode voltage referenced to COM pin. Input configuration (unipolar/bipolar, SGL/DIF) is fully controlled via an 8-bit software-programmable control byte, and the internal 4.096V reference can be overridden by an external 1V–VDD reference applied to REFIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit SAR - delivers 256 discrete output codes with monotonic transfer function and no missing codes over temperature. |
| Sampling Rate | Up to 50ksps - enables real-time capture of signals up to 25kHz (Nyquist) or higher via undersampling techniques. |
| Total Unadjusted Error | ±1 LSB (max), ±0.3 LSB (typ) - ensures accurate digitization without factory calibration for many embedded sensing applications. |
| Supply Current | 135µA at 50ksps; drops to 13µA in software power-down at 1ksps - critical for battery-powered portable instruments. |
| Input Range | 0V to 4.096V (unipolar single-ended); ±2.048V (bipolar differential) - matches standard sensor output ranges and industrial 4–20mA loop interfaces. |
| Reference | Internal 4.096V ±0.8ppm/°C drift - eliminates need for external precision reference in cost-sensitive designs. |
| Serial Interface | SPI/QSPI/MICROWIRE-compatible 4-wire protocol - interoperates directly with most microcontrollers without level-shifting or glue logic. |
Pinout & Package
The MAX1113EEE+ is housed in a 16-pin QSOP (Quad Small Outline Package) with 1.27mm pitch, footprint compatible with industry-standard 16-pin SOIC but 30% smaller area. Thermal resistance θJA = 120°C/W; rated for continuous power dissipation of 667mW at +70°C (derated above).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–4 (CH0–CH3) | Analog Input Channels | Selectable as single-ended inputs or paired as CH0/CH1 and CH2/CH3 for pseudo-differential measurement. |
| 5 (COM) | Common-Mode Reference | Sets zero-code voltage in single-ended mode; must be stable to ±0.5 LSB; tied to AGND or VREFIN/2 for bipolar operation. |
| 6 (REFIN) | Reference Input | Accepts external 1V–VDD reference; connect to REFOUT to enable internal 4.096V reference. |
| 7 (REFOUT) | Internal Reference Output | Provides 4.096V reference; requires 1µF bypass capacitor to AGND for stability and noise rejection. |
| 8 (AGND) | Analog Ground | Separate ground return for analog circuitry; must be star-connected to DGND at single point to minimize noise coupling. |
| 9 (DGND) | Digital Ground | Ground return for digital I/O and logic; isolated from AGND except at system-level single-point connection. |
| 10 (SHDN) | Three-Level Shutdown Control | High-impedance = active; pulled low = 10µA shutdown; pulled high = internal reference disabled - enables flexible power management. |
| 11 (CS) | Active-Low Chip Select | Enables serial interface; DOUT enters high-impedance state when CS is high - allows multi-device SPI bus sharing. |
| 12 (SCLK) | Serial Clock Input | Drives data transfer and (in external mode) controls conversion speed; 50kHz–500kHz range; 45–55% duty cycle required. |
| 13 (DIN) | Serial Data Input | Receives 8-bit control byte on SCLK rising edge; first logic '1' defines MSB - supports flexible command framing. |
| 14 (DOUT) | Serial Data Output | Outputs 8-bit conversion result on SCLK falling edge in MSB-first format; high-impedance when CS is high. |
| 15 (SSTRB) | Serial Strobe Output | Signals end-of-conversion: pulses high for 2 clocks (external mode) or goes high after 25µs (internal mode) - usable as interrupt source. |
| 16 (VDD) | Positive Supply | 4.5V–5.5V single supply; requires local 0.1µF + 1µF ceramic bypass capacitors to AGND - essential for PSR performance. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input mode | Single-ended/differential and unipolar/bipolar selection via control byte - eliminates hardware jumpers and simplifies firmware-driven sensor reconfiguration. |
| Integrated track/hold and reference | Eliminates need for external sample-and-hold amplifier and precision voltage reference - reduces BOM count and PCB area by ≥3 components. |
| 2µA automatic power-down | Reduces supply current to 13µA at 1ksps - extends battery life in solar-powered remote sensors and handheld meters. |
| SPI/QSPI/MICROWIRE compatibility | Direct interface with STM32, PIC, MSP430, and NXP microcontrollers using standard peripheral drivers - no custom bit-banging required. |
| Low aperture jitter (≤50ps) | Preserves SNR in high-frequency signal acquisition - enables accurate measurement of 10kHz sine waves with 49dB SINAD. |
Applications
| Portable Data Logging | Hand-Held Measurement Devices |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and light intensity every 10 seconds. IC Role / Device Role / Timing Role: ADC digitizes conditioned analog outputs from multiple sensors; internal reference and low quiescent current enable >1-year operation on two AA cells. Use Value: Eliminates external reference and reduces active current to 135µA, extending runtime while maintaining ±1 LSB accuracy across –40°C to +85°C. |
Use Scenario: Pocket-sized multimeter acquiring DC voltage, AC RMS, and resistance readings with auto-ranging. IC Role / Device Role / Timing Role: Configures CH0–CH3 for different sensor front ends; uses bipolar mode for AC measurements and unipolar for DC; SSTRB triggers MCU interrupt on completion. Use Value: Single-chip solution replaces discrete op-amp + reference + ADC; 4-channel flexibility supports multi-function design without layout changes. |
| Medical Instruments | Solar-Powered Remote Systems |
Use Scenario: Portable ECG front-end capturing lead-II differential signals at 250Hz with baseline wander correction. IC Role / Device Role / Timing Role: Operates in pseudo-differential mode (CH0/CH1) with COM biased at mid-supply; internal T/H holds signal during conversion to prevent aliasing. Use Value: 800kHz small-signal bandwidth and <1 LSB INL ensure fidelity of low-amplitude bio-signals; QSOP package fits compact wearable form factor. |
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: Powers down between samples; wakes on timer interrupt; performs burst acquisition of 4 sensors in <1ms; shuts down before radio transmission. Use Value: 13µA shutdown current minimizes dark-current drain; internal reference avoids temperature drift errors in unregulated solar charging environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit multi-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 4-channel, SPI interface; 200ksps max; no internal reference - requires external 2.5V ref; 10-pin VSSOP package. | Better speed but higher power (1.2mA at 200ksps); lacks software-configurable bipolar mode and automatic power-down. | Choose ADS7822U only if >50ksps sampling is required and external reference is already present in design. |
| MCP3204-I/P | 12-bit, 4-channel, SPI interface; 100ksps; internal 4.096V reference; 14-pin PDIP package; no SHDN pin or software power-down. | Higher resolution but larger package and fixed 2.5mW power at 100ksps; lacks three-level shutdown and COM pin for bipolar offset control. | Choose MCP3204-I/P when 12-bit resolution is mandatory and board space permits DIP footprint; not suitable for ultra-low-power or bipolar sensor interfaces. |
Compared with ADS7822U and MCP3204-I/P, the MAX1113EEE+ uniquely combines 8-bit precision, 50ksps throughput, integrated reference, software-selectable input modes, and sub-15µA shutdown - making it optimal for space-constrained, battery-operated systems requiring flexible analog input handling without external support components.
Availability
The MAX1113EEE+ is available at Aetrix Electronics and suitable for portable instrumentation, remote industrial monitoring, and medical diagnostics requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1113EEE+ 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX1113EEE+ belongs to Maxim's precision data-acquisition product line, designed specifically for low-power, multi-channel, microcontroller-interfaced ADC applications in portable and remote sensing systems where size, power, and integration are critical.
FAQ
What is the maximum sampling rate supported by the MAX1113EEE+?
The MAX1113EEE+ supports a maximum sampling rate of 50ksps when using the external serial clock mode with a 500kHz SCLK frequency and 10 clock cycles per conversion. In internal clock mode, the conversion time is fixed at 25µs (typ), yielding ~40ksps effective rate. Exceeding 50ksps risks violating tACQ and degrading accuracy due to insufficient track/hold acquisition time.
Does the MAX1113EEE+ require an external voltage reference?
No, the MAX1113EEE+ includes a precision 4.096V internal reference with ±0.8ppm/°C temperature coefficient, accessible at the REFOUT pin and selectable via connection of REFIN to REFOUT. An external reference (1V to VDD) may be used by applying it to REFIN, but it is not required for basic operation.
How many analog input channels does the MAX1113EEE+ support, and what configurations are possible?
The MAX1113EEE+ supports four analog input channels (CH0–CH3), configurable in single-ended mode (four independent inputs referenced to COM) or pseudo-differential mode (two differential pairs: CH0/CH1 and CH2/CH3). Configuration is controlled entirely by bits in the 8-bit software control byte - no hardware modifications are needed.
What is the purpose of the SHDN pin on the MAX1113EEE+?
SHDN is a three-level shutdown input: high-impedance (default) enables normal operation; pulled low reduces supply current to ≤10µA for ultra-low-power standby; pulled high disables the internal reference while keeping digital logic active. This enables fine-grained power control beyond simple on/off, critical for energy harvesting and battery longevity.
Is the MAX1113EEE+ compatible with standard SPI microcontrollers?
Yes, the MAX1113EEE+ is fully compatible with standard SPI peripherals when configured with CPOL = 0 and CPHA = 0. It supports SPI, QSPI, and MICROWIRE protocols, uses MSB-first data framing, and features tri-state DOUT and SSTRB outputs - allowing direct connection to STM32, PIC, AVR, and ARM Cortex-M devices without level shifters or additional logic.
MAX1113EEE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 50k
- Number of Inputs:
- 2, 4
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1113EEE+ FAQ
1.How can I place an order for MAX1113EEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1113EEE+ 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 MAX1113EEE+ reliable?
The price and inventory of MAX1113EEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1113EEE+ is usually 5 days.
3.What payment methods are accepted for MAX1113EEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1113EEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1113EEE+?
MAX1113EEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1113EEE+ 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 MAX1113EEE+?
For technical support, including MAX1113EEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1113EEE+ requirements.
6.How does Aetrix verify that MAX1113EEE+ is sourced from the original manufacturer or authorized distributors?
All MAX1113EEE+ 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 MAX1113EEE+ meets industry standards.
7.What is the process for return or replacement of MAX1113EEE+?
All MAX1113EEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1113EEE+, 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 MAX1113EEE+ part is unused and in its original packaging.
Return procedure for MAX1113EEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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