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Analog Devices Inc./Maxim Integrated MAX11662AUB+
- Part No.:
- MAX11662AUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX11662AUB+.pdf
- Description:
- IC ADC 8BIT SAR 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:102
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Product details
Overview
MAX11662AUB+ from Maxim Integrated is an 8-bit, dual-channel, single-ended successive approximation ADC with 500ksps throughput, 2.2V–3.6V supply operation, and integrated 2:1 analog MUX. It features external reference input (REF), separate digital I/O supply (OVDD), and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface - designed for space-constrained, low-power data acquisition in portable instrumentation and battery-operated systems.
For engineers reviewing the MAX11662AUB+ datasheet, MAX11662AUB+ pinout, MAX11662AUB+ application, or MAX11662AUB+ equivalent, key selection considerations include its dual-channel 8-bit resolution, 10-pin FMAX-EP package with exposed pad, -40°C to +125°C operating range, 1.3µA power-down current, and support for variable OVDD (1.5V–3.6V) enabling direct interfacing with mixed-voltage digital systems.
Technical Context
The MAX11662AUB+ implements a successive approximation register (SAR) architecture with internal sample-and-hold, delivering no pipeline delay and deterministic 1.56µs conversion time. Its dual single-ended inputs (AIN1/AIN2) are routed via an internal 2:1 MUX to a shared ADC core, enabling channel-selectable sampling under CHSEL control.
It supports flexible voltage domains: analog section powered by VDD (2.2V–3.6V), digital interface powered by OVDD (1.5V–3.6V), and reference sourced externally at REF (1V to VDD+0.05V). Timing is synchronized to SCLK (up to 8MHz), with CS-controlled frame initiation and DOUT three-state output compliant with SPI timing conventions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - delivers 256 discrete output codes with guaranteed no missing codes (DNL < ±0.25 LSB). |
| Throughput Rate | 500 ksps - enables real-time sampling of signals up to 250 kHz Nyquist bandwidth with full accuracy. |
| Supply Voltage (VDD) | 2.2 V to 3.6 V - compatible with single-cell Li-ion, 3.3 V, and 2.5 V system rails. |
| Power Consumption | 3.3 mW at 500 ksps - includes 1.67 mA VDD current and 0.1 mA OVDD current, enabling ultra-low-energy operation. |
| Reference Input | External REF pin (1 V to VDD+0.05 V) - allows precision ratiometric or absolute measurement using stable external references. |
| Operating Temperature | -40°C to +125°C - qualified for industrial, automotive, and harsh-environment embedded applications. |
| Power-Down Current | 1.3 µA - enables rapid entry/exit from low-power state without loss of configuration or calibration. |
Pinout & Package
MAX11662AUB+ is housed in a 10-pin FMAX-EP® package (3mm × 5mm, 0.5mm pitch) with exposed thermal pad (EP) that must be soldered to ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AIN1 | Analog Input Channel 1 | Single-ended input referenced to AGND; voltage range 0 V to VREF; 20 pF track capacitance. |
| 2 AIN2 | Analog Input Channel 2 | Second single-ended input with identical specs to AIN1; selected via CHSEL or automatic sequencing. |
| 3 AGND | Analog Ground | Separate ground return for analog circuitry; must be tied to system AGND with low-impedance path. |
| 4 REF | External Reference Input | Accepts precision reference voltage (1 V to VDD+0.05 V); leakage < 1 nA ensures minimal loading. |
| 5 CS | Chip Select | Active-low frame sync signal; falling edge initiates conversion and enables DOUT output driver. |
| 6 SCLK | Serial Clock | Master-controlled clock (0.08–8 MHz); defines timing for data transfer and sampling aperture. |
| 7 CHSEL | Channel Select | Controls MUX routing: logic high selects AIN2, low selects AIN1; optional for auto-sequencing mode. |
| 8 DOUT | Serial Data Output | Three-state CMOS output; outputs MSB-first 8-bit result after CS assertion; compatible with 1.5V–3.6V logic. |
| 9 OVDD | Digital I/O Supply | Independent supply for SCLK, CS, CHSEL, and DOUT; enables level-shifting between analog and digital domains. |
| 10 VDD | Analog/Digital Core Supply | Primary supply for ADC core, reference buffer, and internal logic; also sets default VREF when REF unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay SAR architecture | Enables deterministic 1.56 µs conversion time and immediate data availability - critical for closed-loop control. |
| Dual single-ended analog inputs with 2:1 MUX | Reduces external component count and PCB area vs. two discrete ADCs; supports interleaved or alternating sampling. |
| Variable OVDD (1.5 V to 3.6 V) | Eliminates level-shifters when interfacing with 1.8 V or 2.5 V microcontrollers or FPGAs. |
| External reference input (REF) | Supports high-accuracy ratiometric sensing or absolute measurements using precision external references (e.g., REF5025). |
| 1.3 µA power-down current | Extends battery life in intermittent-sampling applications such as sensor nodes and portable loggers. |
| −40°C to +125°C operation | Validated performance across full industrial temperature range without derating or calibration drift compensation. |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 100 Hz intervals over weeks. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing two analog sensor outputs sequentially via internal MUX; CS-triggered conversions synchronized to MCU sleep/wake cycles. Use Value: 3.3 mW active power and 1.3 µA shutdown current maximize battery runtime; 10-pin FMAX-EP footprint minimizes board area. |
Use Scenario: Handheld ECG front-end acquiring lead-II and lead-III signals simultaneously for arrhythmia detection. IC Role / Device Role / Timing Role: Dual-channel SAR ADC capturing synchronized biopotential waveforms with no latency; REF pin enables calibrated amplitude scaling against medical-grade reference. Use Value: 500 ksps throughput supports >200 kHz effective bandwidth; −40°C to +125°C rating ensures reliability during sterilization and field use. |
| Battery-Operated Systems | Industrial Sensor Interface |
Use Scenario: Wireless smart meter measuring voltage and current on AC mains using isolated shunt and transformer-based sensing. IC Role / Device Role / Timing Role: Digitizing two isolated analog channels (VSENSE, ISENSE) with independent gain stages; OVDD = 1.8 V interfaces directly with RF SoC's GPIO. Use Value: Variable OVDD eliminates level translation; external REF ensures metrology-grade linearity despite VDD variation. |
Use Scenario: Programmable logic controller (PLC) analog input module conditioning 4–20 mA and 0–10 V industrial signals. IC Role / Device Role / Timing Role: High-temperature-stable ADC converting dual process signals with channel-to-channel gain matching ≤0.01 LSB for differential measurements. Use Value: Guaranteed −40°C to +125°C operation avoids thermal derating; crosstalk < −90 dB prevents inter-channel interference in noisy factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, low-power SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 200 ksps, single-supply (2.7–5.25 V), no OVDD pin, internal reference only. | Lacks external REF and variable OVDD; limited to simpler, lower-speed systems without mixed-voltage interfaces. | Select when cost sensitivity outweighs flexibility; avoid if REF control or 1.5 V logic interfacing is required. |
| AD7476AARMZ | 12-bit, 1 MSPS, single-channel, 2.35–5.25 V supply, SPI-only interface, no MUX. | Higher resolution and speed but no dual-input capability; requires external multiplexer for multi-channel use. | Choose for higher-precision single-channel needs; not suitable as drop-in replacement due to pinout and channel count mismatch. |
Compared with ADS7822U and AD7476AARMZ, MAX11662AUB+ uniquely combines dual-channel MUX, external REF, and independent OVDD in a 10-pin package - making it optimal for compact, mixed-voltage, multi-sensor systems where integration and power efficiency are prioritized over raw resolution or speed.
Availability
MAX11662AUB+ is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, battery-operated systems, industrial sensor interfaces, and communication system monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX11662AUB+ 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 demanding industrial, automotive, and medical applications.
The MAX11662AUB+ belongs to the MAX11661–MAX11666 family of low-power, serial SAR ADCs engineered for space-constrained, battery-sensitive data acquisition systems requiring high accuracy, wide temperature operation, and flexible digital interfacing.
FAQ
What is the maximum sampling rate supported by the MAX11662AUB+?
The MAX11662AUB+ supports a maximum throughput rate of 500 ksps, achieved with an 8 MHz SCLK and proper CS timing. This corresponds to a fixed 1.56 µs conversion time per sample and enables accurate digitization of input signals up to 250 kHz (Nyquist limit). The device maintains full DC and dynamic specifications - including SNR of 49.7 dB and SFDR of 67 dB - at this maximum rate.
Does the MAX11662AUB+ require an external reference voltage?
The MAX11662AUB+ supports both internal and external reference configurations. When the REF pin is left unconnected, the device uses VDD as the reference source. However, for improved accuracy, stability, and ratiometric measurement capability, an external reference (1 V to VDD+0.05 V) can be applied to the REF pin - a feature explicitly enabled in the MAX11662AUB+ variant per the datasheet ordering table and electrical characteristics.
Can the MAX11662AUB+ interface directly with a 1.8 V microcontroller?
Yes. The MAX11662AUB+ includes a dedicated OVDD pin that accepts 1.5 V to 3.6 V, allowing its digital interface pins (SCLK, CS, CHSEL, DOUT) to operate at 1.8 V logic levels without external level shifters. The DOUT output is specified to drive 0.85×OVDD high and 0.15×OVDD low at 200 µA, ensuring robust compatibility with 1.8 V MCU GPIOs.
What is the purpose of the exposed pad (EP) on the MAX11662AUB+ package?
The exposed pad (EP) on the MAX11662AUB+'s 10-pin FMAX-EP package must be soldered to a grounded copper plane. It serves dual purposes: (1) thermal dissipation to maintain junction temperature within limits under continuous 500 ksps operation, and (2) reduction of analog ground noise by providing a low-impedance return path for AGND. Failure to connect EP to ground will cause functional failure per the datasheet warning.
How does channel selection work on the MAX11662AUB+?
Channel selection on the MAX11662AUB+ is controlled by the CHSEL pin: logic high selects AIN2, logic low selects AIN1. Alternatively, the device supports auto-sequencing mode where consecutive conversions automatically alternate between AIN1 and AIN2 without CHSEL toggling - simplifying firmware for dual-sensor polling. Both modes retain full 8-bit accuracy and timing compliance per the datasheet timing diagrams.
MAX11662AUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 2
- 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
- Voltage - Supply, Analog:
- 2.2V ~ 3.6V
- Voltage - Supply, Digital:
- 2.2V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 10-uMAX-EP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11662AUB+ FAQ
1.How can I place an order for MAX11662AUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11662AUB+ 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 MAX11662AUB+ reliable?
The price and inventory of MAX11662AUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11662AUB+ is usually 5 days.
3.What payment methods are accepted for MAX11662AUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11662AUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11662AUB+?
MAX11662AUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11662AUB+ 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 MAX11662AUB+?
For technical support, including MAX11662AUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11662AUB+ requirements.
6.How does Aetrix verify that MAX11662AUB+ is sourced from the original manufacturer or authorized distributors?
All MAX11662AUB+ 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 MAX11662AUB+ meets industry standards.
7.What is the process for return or replacement of MAX11662AUB+?
All MAX11662AUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11662AUB+, 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 MAX11662AUB+ part is unused and in its original packaging.
Return procedure for MAX11662AUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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