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Analog Devices Inc./Maxim Integrated MAX11626EEE+
- Part No.:
- MAX11626EEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX11626EEE+.pdf
- Description:
- IC ADC 12BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,830
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Product details
Overview
The MAX11626EEE+ from Maxim Integrated is a 12-bit, 300ksps serial-output analog-to-digital converter with integrated 4.096V reference, 4-channel single-ended analog input multiplexer, on-chip FIFO, and SPI/QSPI/MICROWIRE-compatible interface. It operates from a +4.75V to +5.25V supply, features ±1 LSB INL/DNL, and supports system supervision and industrial data acquisition in compact QSOP-16 packages.
For engineers reviewing the MAX11626EEE+ datasheet, MAX11626EEE+ pinout, MAX11626EEE+ application, or MAX11626EEE+ equivalent, key selection criteria include its 4-channel count, internal 4.096V reference, 16-entry FIFO, AutoShutdown™ current reduction to 0.2–5µA, and guaranteed no missing codes over –40°C to +85°C.
Technical Context
This SAR ADC integrates a track-and-hold circuit optimized for unipolar 0–VREF inputs, with 1MHz small-signal bandwidth enabling undersampling of transient events. Its internal oscillator (±10% accuracy at 4.4MHz) supports clock modes 00/01/10, while clock mode 11 enables externally timed 300ksps sampling using SCLK up to 4.8MHz.
The device implements configurable scan sequencing, internal averaging (1–16 samples), and conversion start via CNVST pin or serial command. Input protection includes ESD diodes clamping to VDD/GND, and analog inputs tolerate –0.3V to VDD+0.05V-critical for robust industrial signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR architecture delivering 4096 discrete output levels with monotonic transfer function. |
| Sampling Rate | Up to 300ksps using external SCLK; internally clocked modes support lower deterministic rates with autonomous scan control. |
| INL / DNL | ±1 LSB integral and differential nonlinearity ensures accurate code transitions and absence of missing codes across temperature. |
| Reference Voltage | Fixed 4.096V internal reference (±20ppm/°C TC), eliminating need for external precision reference in many applications. |
| FIFO Depth | 16-entry first-in/first-out buffer stores full 16-bit conversion results, decoupling acquisition from serial readout timing. |
| Supply Current | 2300–2550µA at 300ksps with internal reference; drops to 0.2–5µA in AutoShutdown™ mode for power-sensitive systems. |
| Digital Interface | 10MHz 3-wire SPI-/QSPI-/MICROWIRE-compatible port with CS, SCLK, DIN, DOUT, and EOC-no additional level-shifting required for 5V µP interfacing. |
Pinout & Package
The MAX11626EEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch) with exposed pad for thermal performance. Pin functions are validated per Maxim's official datasheet Rev 5 (19-5323).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN3 | Analog Input Channels | Four dedicated single-ended voltage inputs referenced to GND; support unipolar 0–4.096V range with 24pF input capacitance. |
| REF | Reference Output | Provides stable 4.096V internal reference; requires 0.1µF bypass capacitor to GND for noise suppression and settling stability. |
| VDD / GND | Power Supply | +4.75V to +5.25V operation; 0.1µF local bypassing mandatory at each pin to maintain PSRR > –70dB and minimize sampling error. |
| CS / SCLK / DIN / DOUT | Serial Interface | Standard 3-wire SPI protocol: CS enables interface, SCLK clocks data (≤10MHz), DIN loads commands, DOUT outputs results MSB-first. |
| EOC | End-of-Conversion Flag | Active-low open-drain output signals completion of conversion sequence; used for interrupt-driven µP polling or DMA triggering. |
| CNVST | Conversion Start | Active-low hardware trigger for single-shot or scan-mode conversions; configurable via setup register CKSEL bits. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 4.096V reference | Eliminates external reference IC and associated layout complexity while maintaining ±20ppm/°C drift for stable full-scale calibration. |
| 16-entry FIFO buffer | Enables burst acquisition of up to 16 conversions without µP intervention, reducing serial bus contention in real-time monitoring systems. |
| AutoShutdown™ mode | Reduces supply current to sub-5µA between conversions-critical for battery-powered data loggers requiring multi-day operation. |
| Scan mode with internal averaging | Supports programmable channel sequencing (NSCAN1/NSCAN0) and 1–16-sample averaging per result to improve SNR in noisy industrial environments. |
| Internal track-and-hold | Integrated T/H circuit with 1MHz bandwidth captures fast transients; acquisition time scales predictably with source impedance (tACQ = 9×(RS+1.5kΩ)×24pF + 1µs). |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous voltage monitoring of 4 sensor outputs (temperature, pressure, flow, level) in PLC-based control cabinets. IC Role / Device Role / Timing Role: 4-channel ADC digitizing analog sensor outputs at ≤10ksps with FIFO buffering to accommodate variable µP response latency. Use Value: Internal 4.096V reference ensures consistent full-scale accuracy across channels without trimming; AutoShutdown™ cuts idle power by >99% versus continuous conversion. | Use Scenario: Portable ECG front-end acquiring lead I, II, III, and respiration signals in clinical-grade patient monitors. IC Role / Device Role / Timing Role: Low-noise, low-power ADC capturing biopotential waveforms with 73dB SINAD and <50ps aperture jitter for diagnostic fidelity. Use Value: ±1 LSB INL/DNL guarantees precise amplitude measurement of microvolt-level cardiac signals; 16-entry FIFO prevents data loss during Bluetooth transmission bursts. |
| Data Logging in Harsh Environments | Embedded System Supervision |
Use Scenario: Remote environmental sensor node logging temperature, humidity, and battery voltage over extended periods using coin-cell power. IC Role / Device Role / Timing Role: Autonomous 4-channel acquisition triggered by wake-up timer, storing results in FIFO until µP initiates serial readout. Use Value: 0.2–5µA shutdown current extends battery life to years; internal reference avoids drift-induced calibration drift over wide temperature ranges (–40°C to +85°C). | Use Scenario: Real-time voltage, current, and temperature monitoring of FPGA power rails and thermal zones on industrial compute modules. IC Role / Device Role / Timing Role: Dedicated ADC scanning critical supply nodes at 100ksps with internal averaging to reject switching noise from DC/DC converters. Use Value: 73dB SINAD and –88dBc THD suppress high-frequency noise from digital subsystems; 4.096V reference matches common 12-bit DAC full-scale for closed-loop control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 1MSPS, 16-channel, SPI interface, 2.7–5.25V supply, internal 2.5V ref (not 4.096V) | Higher speed and channel count but lacks AutoShutdown™ and FIFO depth matching; requires external ref for 4.096V scaling | Select when higher throughput or more channels are needed; verify ref voltage compatibility with system gain stages |
| AD7476ARTZ-REEL7 | 12-bit, 1MSPS, single-channel, SPI interface, no FIFO, no internal ref (external ref required), 2.7–5.25V supply | No multiplexing, no FIFO, no internal reference-requires external ref and µP coordination for multi-channel use | Select only for single-input, high-speed applications where simplicity and cost outweigh channel/FIFO needs |
Compared with ADS7953IRHBT and AD7476ARTZ-REEL7, the MAX11626EEE+ uniquely combines 4-channel multiplexing, 16-entry FIFO, AutoShutdown™, and factory-trimmed 4.096V reference in a single 16-pin QSOP-reducing BOM count and PCB area for compact, low-power multichannel acquisition.
Availability
The MAX11626EEE+ is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical instrumentation, remote data logging, and embedded system supervision requiring stable component supply and long-term lifecycle support.
Supply support for MAX11626EEE+ 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 MAX11626EEE+ belongs to Maxim's low-power, multichannel SAR ADC product line engineered for system-level monitoring and data acquisition where integration, accuracy, and power efficiency are critical.
FAQ
What is the maximum sampling rate achievable with the MAX11626EEE+?
The MAX11626EEE+ achieves a maximum sampling rate of 300ksps when using an external clock (SCLK) in clock mode 11. Internally clocked modes support lower deterministic rates-typically ~200ksps-due to ±10% oscillator tolerance and overhead from FIFO management and serial interface handshaking. The 300ksps figure assumes 4.8MHz SCLK, 50% duty cycle, and proper timing margins per datasheet Figure 1.
Does the MAX11626EEE+ require an external reference voltage?
No, the MAX11626EEE+ does not require an external reference voltage-it integrates a factory-trimmed 4.096V internal reference with ±20ppm/°C temperature coefficient. This reference is enabled by default and eliminates external components for most applications. An external reference (1V to VDD) may be applied to the REF pin if higher precision or different full-scale range is needed, but doing so disables the internal reference.
How many analog input channels does the MAX11626EEE+ support?
The MAX11626EEE+ supports exactly four single-ended analog input channels: AIN0, AIN1, AIN2, and AIN3. This is fixed per the device variant-unlike the MAX11632/MAX11633 (16-channel) or MAX11628/MAX11629 (8-channel) siblings. Channel selection is controlled via the CHSEL[3:0] bits in the conversion register, and all four channels are accessible in scan mode using NSCAN1/NSCAN0 configuration.
What package type is used for the MAX11626EEE+?
The MAX11626EEE+ uses a 16-pin QSOP (Quarter Size Outline Package) with 0.65mm lead pitch and dimensions of 5.3mm × 10.2mm. The "+" suffix in the part number denotes RoHS-compliant, lead-free construction. This package provides adequate thermal performance for typical industrial operating conditions and is compatible with standard surface-mount assembly processes.
Can the MAX11626EEE+ operate from a 3.3V supply?
No, the MAX11626EEE+ is specified only for +4.75V to +5.25V supply operation. It belongs to the MAX11626/MAX11628/MAX11632 family subset that requires 5V-compatible supplies and delivers a 4.096V internal reference. For 3.3V operation, the MAX11627EEE+ (same pinout, 2.7–3.6V supply, 2.5V reference) is the functional counterpart-but it is a distinct orderable part, not a voltage-range variant of MAX11626EEE+.
MAX11626EEE+ 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:
- 12
- Sampling Rate (Per Second):
- 300k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- 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:
- -
MAX11626EEE+ FAQ
1.How can I place an order for MAX11626EEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11626EEE+ 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 MAX11626EEE+ reliable?
The price and inventory of MAX11626EEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11626EEE+ is usually 5 days.
3.What payment methods are accepted for MAX11626EEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11626EEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11626EEE+?
MAX11626EEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11626EEE+ 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 MAX11626EEE+?
For technical support, including MAX11626EEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11626EEE+ requirements.
6.How does Aetrix verify that MAX11626EEE+ is sourced from the original manufacturer or authorized distributors?
All MAX11626EEE+ 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 MAX11626EEE+ meets industry standards.
7.What is the process for return or replacement of MAX11626EEE+?
All MAX11626EEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11626EEE+, 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 MAX11626EEE+ part is unused and in its original packaging.
Return procedure for MAX11626EEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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