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Analog Devices Inc./Maxim Integrated MAX11621EEE+T
- Part No.:
- MAX11621EEE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX11621EEE+T.pdf
- Description:
- IC ADC 10BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,481
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Product details
Overview
MAX11621EEE+T from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with integrated 2.5V reference, 8-channel single-ended analog multiplexer, 16-entry FIFO, and SPI/QSPI/MICROWIRE-compatible interface. It operates from a +2.7V to +3.6V supply and targets precision system supervision and industrial data acquisition where low power, on-chip averaging, and scan-mode operation are required.
For engineers reviewing the MAX11621EEE+T datasheet, MAX11621EEE+T pinout, MAX11621EEE+T application, or MAX11621EEE+T equivalent, this page delivers verified electrical specifications, confirmed QSOP-16 package mapping, validated 16-pin terminal roles, real-world use cases in patient monitoring and instrumentation, and two technically documented alternative parts for design flexibility.
Technical Context
The MAX11621EEE+T implements a successive-approximation register (SAR) architecture with on-chip track-and-hold, supporting unipolar 0–2.5V input range referenced to GND. Its internal oscillator enables autonomous scan mode at up to 300ksps, while the 16-deep FIFO decouples conversion from serial readout.
It features four programmable clock modes-including CNVST-triggered internal timing (mode 00) and externally clocked high-speed acquisition (mode 11)-and supports internal averaging across up to 16 samples per result to improve SNR in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR ADC with no missing codes over –40°C to +85°C |
| Sampling Rate | Up to 300ksps using external SCLK ≤10MHz; internally clocked rate configurable via setup register |
| Input Channels | 8 single-ended analog inputs (AIN0–AIN7), with CNVST/AIN7 dual-function pin |
| Reference Voltage | Internal 2.50V ±20mV (±30ppm/°C TC); external reference supported from 1.0V to VDD |
| DC Accuracy | ±1 LSB INL and ±1 LSB DNL; ±0.5 LSB typical offset error; ±0.5 LSB typical gain error |
| Dynamic Performance | 62dB SINAD, –79dBc THD, –81dBc SFDR at 30kHz input; 1MHz full-power bandwidth |
| Supply Current | 1.05–1.2mA at 300ksps with internal reference; 0.2–5µA in AutoShutdown™ mode |
Pinout & Package
MAX11621EEE+T is housed in a 16-pin QSOP (Quad Small Outline Package) with 0.154" body width and standard 0.025" pitch. Pin 1 is marked by a dot or beveled corner; device orientation follows JEDEC MO-137AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4 | AIN0–AIN3 | Analog input channels; support unipolar 0–VREF range; internally connected to T/H and multiplexer |
| 5–7 | N.C. | No connection; not internally bonded; must be left floating or tied to GND per layout guidelines |
| 8 | CNVST/AIN7 | Active-low conversion start input OR analog input 7; function selected via setup register bit CNVST_EN |
| 9 | REF | Reference voltage input/output; bypassed to GND with 0.1µF ceramic capacitor; sources 2.5V internal reference |
| 10 | GND | Analog and digital ground reference; requires low-impedance connection to system ground plane |
| 11 | VDD | +2.7V to +3.6V power supply; bypassed to GND with 0.1µF ceramic capacitor near pin |
| 12 | CS | Active-low chip select; enables serial interface and controls DOUT three-state behavior |
| 13 | SCLK | Serial clock input; accepts 40–60% duty cycle; max 10MHz frequency; clocks DIN and DOUT edges |
| 14 | DIN | Serial data input; command bytes (setup, conversion, averaging registers) loaded on SCLK rising edge |
| 15 | DOUT | Serial data output; 16-bit result (MSB first, 4 leading zeros) clocked on SCLK falling edge |
| 16 | EOC | End-of-conversion open-drain output; goes low when conversion completes; active in clock modes 00/01/10 |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 16-entry FIFO | Enables burst conversion without CPU intervention; prevents data loss during serial bus contention |
| Programmable clock modes (00–11) | Supports flexible timing: CNVST-triggered scans, single-shot conversions, or externally clocked 300ksps acquisition |
| Internal averaging (1–16 samples) | Reduces RMS noise by √N; improves effective resolution for low-frequency sensor signals |
| AutoShutdown™ mode | Reduces supply current to ≤5µA between conversions; ideal for battery-powered system supervision |
| ±1 LSB INL/DNL over temperature | Guarantees monotonicity and linearity across –40°C to +85°C; eliminates calibration in many applications |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensors in PLC-based control cabinets with limited board space and thermal constraints. IC Role / Device Role / Timing Role: 8-channel ADC digitizes analog sensor outputs; FIFO buffers readings during communication gaps; internal clocking reduces MCU overhead. Use Value: Enables deterministic sampling at 100ksps without CPU polling; 2.5V reference ensures consistent scaling across channels; QSOP-16 footprint fits dense industrial PCB layouts. |
Use Scenario: Portable ECG and SpO₂ monitor acquiring multiple biopotential signals with low power budget and strict EMC requirements. IC Role / Device Role / Timing Role: Digitizes amplified analog front-end outputs; internal averaging suppresses 50/60Hz interference; AutoShutdown™ extends battery life between measurements. Use Value: 62dB SINAD meets clinical-grade signal fidelity; ±1 LSB INL ensures accurate amplitude tracking; 0.2–5µA shutdown current minimizes quiescent drain. |
| Data Logging in Harsh Environments | Test & Measurement Instrumentation |
|
Use Scenario: Ruggedized field logger capturing environmental parameters (voltage, current, humidity) across extended temperature ranges and vibration exposure. IC Role / Device Role / Timing Role: ADC interfaces with isolated sensor conditioners; scan mode sequences channels autonomously; internal reference eliminates external REF IC cost and area. Use Value: Specified over –40°C to +85°C; 2.5V reference stability (±30ppm/°C) maintains accuracy across thermal cycling; QSOP package withstands mechanical stress better than SOIC. |
Use Scenario: Benchtop multimeter or modular DAQ module requiring high channel count, repeatable linearity, and fast throughput for automated test systems. IC Role / Device Role / Timing Role: Provides calibrated 10-bit digitization with FIFO buffering; SPI interface allows daisy-chaining multiple units; internal clock simplifies synchronization. Use Value: 300ksps maximum rate supports transient capture; ±1 LSB DNL guarantees no code transitions are missed; 16-pin QSOP eases socketing and rework in lab hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit resolution, 1MSPS, 16-channel, SPI interface, no internal reference; requires external 2.5V REF | Higher resolution and speed but larger 32-pin VQFN package; no FIFO or AutoShutdown™ | Select when >10-bit ENOB or >300ksps throughput is required; verify REF sourcing and layout for higher speed |
| AD7476ARTZ-REEL7 | 12-bit, 1MSPS, single-channel, no FIFO, no internal reference, 6-pin SOT-23 package | Compact size and speed trade off channel count, FIFO, and integrated reference functionality | Choose only for single-signal, space-constrained designs where external multiplexing and REF are already implemented |
Compared with ADS7953IRHBT and AD7476ARTZ-REEL7, MAX11621EEE+T uniquely combines 8-channel capability, on-chip 2.5V reference, 16-deep FIFO, and sub-5µA shutdown in a 16-pin QSOP-making it optimal for compact, low-power, multi-sensor embedded systems where integration reduces BOM count and layout complexity.
Availability
MAX11621EEE+T is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical devices, environmental data logging, and benchtop instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX11621EEE+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX116xx family was designed specifically for low-power, multichannel data acquisition in space-constrained embedded systems-emphasizing integrated references, FIFO buffering, and flexible timing to reduce MCU load and external component count.
FAQ
What is the maximum sampling rate achievable with MAX11621EEE+T?
The MAX11621EEE+T achieves a maximum sampling rate of 300ksps when using an external SCLK up to 10MHz in clock mode 11. In internally clocked modes (00, 01, 10), the rate depends on the programmed oscillator frequency and scan configuration, typically ranging from 10ksps to 100ksps. The MAX11621EEE+T datasheet specifies timing limits for each mode, including tCONV and tACQ dependencies on source impedance.
Does MAX11621EEE+T require an external reference voltage?
No, MAX11621EEE+T does not require an external reference voltage-it integrates a precision 2.50V ±20mV internal reference with ±30ppm/°C temperature coefficient. However, it supports external reference operation from 1.0V to VDD, enabling custom full-scale ranges. When using the internal reference, REF pin must be bypassed with a 0.1µF capacitor to GND.
How many analog input channels does MAX11621EEE+T support?
MAX11621EEE+T supports 8 single-ended analog input channels: AIN0 through AIN7. Pin 8 functions as either CNVST (active-low conversion start) or AIN7, depending on the CNVST_EN bit setting in the setup register. AIN4–AIN6 are no-connect (N.C.) pins on this variant and must remain unconnected.
What package type is used for MAX11621EEE+T?
MAX11621EEE+T is supplied in a 16-pin QSOP (Quad Small Outline Package) with 0.154" body width and 0.025" lead pitch. This RoHS-compliant, lead-free package is designated by the "+T" suffix and is compatible with standard surface-mount assembly processes. Thermal resistance is θJA = 105°C/W on a 4-layer board.
Can MAX11621EEE+T operate with a 5V supply?
No, MAX11621EEE+T is specified only for +2.7V to +3.6V supply operation. It belongs to the low-voltage variant group (MAX11619/MAX11621/MAX11625) with 2.5V internal reference. Using a 5V supply exceeds absolute maximum ratings and may cause permanent damage. For 4.75–5.25V operation, consider the pin-compatible MAX11620EEE+T (same 8-channel QSOP-16, 4.096V reference).
MAX11621EEE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 300k
- Number of Inputs:
- 8
- 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:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11621EEE+T FAQ
1.How can I place an order for MAX11621EEE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11621EEE+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 MAX11621EEE+T reliable?
The price and inventory of MAX11621EEE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11621EEE+T is usually 5 days.
3.What payment methods are accepted for MAX11621EEE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11621EEE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11621EEE+T?
MAX11621EEE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11621EEE+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 MAX11621EEE+T?
For technical support, including MAX11621EEE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11621EEE+T requirements.
6.How does Aetrix verify that MAX11621EEE+T is sourced from the original manufacturer or authorized distributors?
All MAX11621EEE+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 MAX11621EEE+T meets industry standards.
7.What is the process for return or replacement of MAX11621EEE+T?
All MAX11621EEE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11621EEE+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 MAX11621EEE+T part is unused and in its original packaging.
Return procedure for MAX11621EEE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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