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Analog Devices Inc./Maxim Integrated MAX1116EKA+T
- Part No.:
- MAX1116EKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8
- Datasheet:
-
MAX1116EKA+T.pdf
- Description:
- IC ADC 8BIT SAR SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,328
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Product details
Overview
The MAX1116EKA+T from Maxim Integrated is an 8-bit successive-approximation analog-to-digital converter (ADC) with integrated track/hold, +4.096V internal reference, SPI/QSPI/MICROWIRE-compatible 3-wire serial interface, and AutoShutdown™ power-down mode. It operates from +4.5V to +5.5V, consumes 175µA at 100ksps, and delivers ±1 LSB INL/DNL accuracy in an 8-pin SOT23 package. It is used for precision voltage monitoring in battery-powered remote data-acquisition systems.
For engineers reviewing the MAX1116EKA+T datasheet, MAX1116EKA+T pinout, MAX1116EKA+T application, or MAX1116EKA+T equivalent, key selection criteria include its fixed +4.096V reference, VDD/2 sampling capability, 7.5µs conversion time, SOT23 footprint compatibility, and low-power operation down to <1µA in AutoShutdown mode.
Technical Context
The MAX1116EKA+T uses a single-supply BiCMOS SAR architecture with internal switched-capacitor DAC and auto-zero rail referenced to VDD/2. Its input stage includes a track/hold circuit with 4MHz small-signal bandwidth and supports sampling of CH0 or internal VDD/2.
Conversion is initiated by the falling edge of CNVST and completed in ≤7.5µs using an internal clock; no external timing components are required. The 3-wire serial interface supports idle-high or idle-low SCLK polarity and outputs MSB-first straight-binary data on DOUT's falling edge at up to 5MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes for voltage digitization |
| Internal Reference Voltage | +4.096V - sets full-scale input range (0V to 4.096V), enabling 15.625mV/LSB step size |
| Supply Voltage Range | +4.5V to +5.5V - requires stable 5V rail; not compatible with 3.3V systems |
| Sampling Rate | 100ksps - supports real-time monitoring of signals up to ~40kHz via undersampling |
| INL / DNL Accuracy | ±1 LSB - ensures monotonicity and ≤0.4% full-scale linearity error after calibration |
| Supply Current | 175µA at 100ksps; <1µA in AutoShutdown - enables multi-year battery life in intermittent-sampling applications |
| Conversion Time | ≤7.5µs - allows deterministic timing control and minimal µC intervention per sample |
Pinout & Package
Package: 8-pin SOT23 (3.0mm × 1.7mm footprint, 30% area of standard 8-pin SO). Pin 1 marked with dot; top view shown in datasheet Figure 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Must be +4.5V to +5.5V; powers analog and digital sections; bypass with 0.1µF capacitor near pin |
| CH0 (Pin 2) | Analog input channel | Single-ended input (0V to VREF); source impedance <1.5kΩ required for accurate settling |
| I.C. (Pins 3 & 5) | Internally connected node | Must be connected to GND; not functional I/O; floating violates specification |
| GND (Pin 4) | Analog/digital ground reference | Single-point star ground required; separates analog return path from noisy digital traces |
| CNVST (Pin 6) | Convert/start control input | Falling edge initiates acquisition; second toggle selects VDD/2 sampling; 50ns minimum high pulse width |
| DOUT (Pin 7) | Serial data output | Three-state output; presents MSB immediately post-conversion; high-impedance after 8th SCLK rising edge |
| SCLK (Pin 8) | Serial clock input | Drives data readout; supports up to 5MHz; ignored during conversion; idle-high or idle-low compatible |
Key Features
| Feature | Design Value |
|---|---|
| Integrated +4.096V reference | Eliminates external reference IC and trimming, reducing BOM count and layout area |
| AutoShutdown™ mode | Reduces quiescent current to <1µA between conversions without software or external control logic |
| VDD/2 sampling capability | Enables ratiometric or mid-supply reference measurements without external resistor dividers |
| SPI/QSPI/MICROWIRE compatibility | Direct interface to common microcontroller peripherals-no level shifters or glue logic needed |
| 4MHz input bandwidth | Supports accurate digitization of fast transients and enables undersampling of higher-frequency signals |
Applications
| Battery-Powered Remote Data Acquisition | System Diagnostics in Industrial Controllers |
|---|---|
Use Scenario: 4–20mA loop-powered sensor nodes measuring temperature, pressure, or flow in unattended field installations. IC Role / Device Role / Timing Role: ADC digitizes conditioned analog sensor output; AutoShutdown minimizes average current draw between polling intervals. Use Value: Enables >5-year battery life at 10ksps sampling while maintaining ±1 LSB linearity and eliminating external reference components. |
Use Scenario: Real-time voltage and rail health monitoring inside programmable logic controllers (PLCs) and motor drives. IC Role / Device Role / Timing Role: Monitors VDD/2 and CH0 inputs to detect overvoltage, brownout, or sensor fault conditions with deterministic 7.5µs latency. Use Value: Provides fail-safe diagnostics without adding µC overhead-conversion completes autonomously and result is available via SPI on demand. |
| Low-Power Hand-Held Test Equipment | Receive-Signal-Strength Indicator (RSSI) |
Use Scenario: Portable multimeters and handheld oscilloscope probes requiring ultra-low standby power and compact PCB area. IC Role / Device Role / Timing Role: Digitizes front-end amplifier outputs; SOT23 package reduces board space vs. SOIC alternatives. Use Value: Delivers 100ksps throughput and ±1 LSB accuracy in a 3.0mm × 1.7mm footprint-ideal for space-constrained portable designs. |
Use Scenario: RF receiver modules where logarithmic signal strength must be converted to digital for AGC or display. IC Role / Device Role / Timing Role: Converts detector diode output (0–4.096V range) into 8-bit RSSI value synchronized to RF frame timing. Use Value: Internal +4.096V reference matches typical RSSI scaling; 7.5µs conversion enables tight timing alignment with packet reception windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1115EKA+T | +2.048V internal reference; +2.7V to +3.6V supply range | Designed for 3.3V systems; lower full-scale range suits low-voltage sensor outputs | Select when operating from 3.3V rails or measuring sub-2.5V signals with higher resolution per mV |
| ADS7822U | 2.7V–5.25V supply; 2.5V reference; 125ksps; 10-pin MSOP | Larger package; higher speed; no AutoShutdown; requires external reference decoupling | Choose when higher sampling rate or 10-bit resolution is required, and board area permits MSOP |
Compared with MAX1115EKA+T, the MAX1116EKA+T provides double the reference voltage and tighter supply range-making it optimal for 5V systems measuring 0–4V signals. Versus ADS7822U, it trades speed and resolution for ultra-low quiescent current and smaller footprint, prioritizing battery longevity and miniaturization.
Availability
MAX1116EKA+T is available at Aetrix Electronics and suitable for battery-powered test equipment, remote industrial sensors, and hand-held diagnostic tools requiring stable component supply across extended production lifecycles.
Supply support for MAX1116EKA+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 industrial, medical, and communications applications.
The MAX1115/MAX1116 product line targets ultra-low-power, space-constrained data acquisition-delivering integrated reference, track/hold, and serial interface in minimal SOT23 packaging for portable and remote sensing.
FAQ
What is the exact internal reference voltage of the MAX1116EKA+T?
The MAX1116EKA+T features a factory-trimmed internal reference voltage of +4.096V, which defines its full-scale analog input range (0V to 4.096V). This value is specified in the Electrical Characteristics table and confirmed across temperature (–40°C to +85°C) with typical drift of 90ppm/°C. The MAX1116EKA+T does not support external reference override.
Can the MAX1116EKA+T operate from a 3.3V supply?
No, the MAX1116EKA+T is specified only for +4.5V to +5.5V supply operation. Attempting to power it from 3.3V will result in undefined behavior or failure to convert. For 3.3V systems, the pin-compatible MAX1115EKA+T-with +2.048V reference and +2.7V to +3.6V supply range-is the correct variant.
How does the AutoShutdown™ mode function in the MAX1116EKA+T?
The MAX1116EKA+T automatically enters AutoShutdown™ mode (<1µA supply current) immediately after conversion completion and serial data readout. No external signal or register write is needed-it is fully autonomous. The device remains in this state until the next CNVST falling edge triggers a new acquisition cycle.
What is the maximum SCLK frequency supported by the MAX1116EKA+T?
The MAX1116EKA+T supports serial clock (SCLK) frequencies up to 5MHz, as verified in the Timing Characteristics table. At this rate, all 8 bits are clocked out in ≤1.6µs after conversion completion. SCLK may idle high or low, matching SPI CPOL/CPHA = 0/0 or 1/1 configurations without modification.
Does the MAX1116EKA+T support differential input or multiple channels?
No, the MAX1116EKA+T is a single-channel, single-ended ADC with one analog input (CH0). It does not support differential input pairs or multiplexed channel scanning. Its functional diagram and pinout confirm only CH0 as the analog input terminal; all other pins are power, ground, or digital interface.
MAX1116EKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 1
- Input Type:
- 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:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- SOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1116EKA+T FAQ
1.How can I place an order for MAX1116EKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1116EKA+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 MAX1116EKA+T reliable?
The price and inventory of MAX1116EKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1116EKA+T is usually 5 days.
3.What payment methods are accepted for MAX1116EKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1116EKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1116EKA+T?
MAX1116EKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1116EKA+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 MAX1116EKA+T?
For technical support, including MAX1116EKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1116EKA+T requirements.
6.How does Aetrix verify that MAX1116EKA+T is sourced from the original manufacturer or authorized distributors?
All MAX1116EKA+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 MAX1116EKA+T meets industry standards.
7.What is the process for return or replacement of MAX1116EKA+T?
All MAX1116EKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1116EKA+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 MAX1116EKA+T part is unused and in its original packaging.
Return procedure for MAX1116EKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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