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Analog Devices Inc./Maxim Integrated MAX11666AUB/V+T
- Part No.:
- MAX11666AUB/V+T
- 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:
-
MAX11666AUB/V+T.pdf
- Description:
- IC ADC 12BIT SAR 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,081
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Product details
Overview
MAX11666AUB/V+T from Maxim Integrated is a 12-bit, dual-channel, single-ended successive approximation ADC with 500ksps throughput, 72.5dB SNR, and 2.2V–3.6V supply operation. It features external reference input, 1.3µA power-down current, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface - designed for high-precision sensor signal acquisition in automotive-grade embedded systems.
For engineers reviewing the MAX11666AUB/V+T datasheet, MAX11666AUB/V+T pinout, MAX11666AUB/V+T application, or MAX11666AUB/V+T equivalent, key selection considerations include its dual-channel 12-bit resolution, -40°C to +125°C automotive qualification, external reference support, low-noise analog front-end, and µMAX-EP package compatibility with space-constrained PCB layouts.
Technical Context
The MAX11666AUB/V+T implements a fully differential sample-and-hold stage followed by a 12-bit SAR core, accepting two independent single-ended analog inputs (AIN1/AIN2) routed via an internal 2:1 MUX. Its architecture supports simultaneous channel-to-channel offset matching (±0.4 LSB) and gain matching (±0.05 LSB), enabling accurate differential measurements without external calibration.
It uses a dedicated OVDD pin for digital I/O voltage scaling (1.5V–3.6V), decoupling logic interface levels from analog supply (VDD), and includes an isolated REF input for precision external reference sourcing - distinguishing it from single-channel variants that derive reference internally from VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 1 LSB = VREF/4096 quantization step for high-fidelity sensor digitization |
| Throughput Rate | 500 ksps - enables real-time sampling of signals up to 2.5 MHz full-linear bandwidth (SINAD > 68 dB) |
| SNR | 72.5 dB typical - supports >11.7 effective number of bits (ENOB) at 250 kHz input frequency |
| Power-Down Current | 1.3 µA - minimizes standby power in battery-critical automotive subsystems during sleep modes |
| Analog Input Range | 0 V to VREF - accepts externally supplied reference up to VDD + 0.05 V for flexible scaling |
| Operating Temperature | -40°C to +125°C - qualified per AEC-Q100 for under-hood and ADAS sensor interface applications |
| Aperture Jitter | 15 ps - limits sampling uncertainty to <0.03 LSB at 250 kHz, preserving dynamic performance |
Pinout & Package
MAX11666AUB/V+T is housed in a 10-pin µMAX-EP package (3 mm × 5 mm, 0.8 mm height) with exposed pad (EP) requiring connection to AGND for thermal and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AIN1 | Analog Input Channel 1 | Single-ended input referenced to AGND; 0 V to VREF range; 20 pF track capacitance |
| 2 - AIN2 | Analog Input Channel 2 | Second independent single-ended input; shares same reference and dynamic specs as AIN1 |
| 3 - OVDD | Digital I/O Supply | Independent 1.5V–3.6V rail for SCLK/CS/CHSEL/DOUT - isolates digital noise from analog section |
| 4 - AGND | Analog Ground | Separate ground return for analog circuitry; must be tied to system AGND, not DGND |
| 5 - CHSEL | Channel Select Control | Active-high logic input selecting AIN1 (low) or AIN2 (high); enables sequential dual-channel reads |
| 6 - REF | External Reference Input | High-impedance input accepting 1 V to VDD + 0.05 V; 5 pF capacitance; enables ratiometric or precision absolute measurement |
| 7 - CS | Chip Select | Active-low enable for serial interface; falling edge initiates conversion and defines aperture timing |
| 8 - SCLK | Serial Clock Input | Accepts 8 MHz max clock; 40–60% duty cycle; controls bit transfer timing and conversion rate |
| 9 - DOUT | Serial Data Output | 3-state CMOS output; tri-states when CS is high; data valid 15 ns after SCLK falling edge |
| 10 - VDD | Analog/Digital Core Supply | Primary 2.2V–3.6V supply powering SAR core, sample-and-hold, and internal logic; 3.3 mW total active power |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True successive approximation architecture ensures deterministic 1.56 µs conversion time - critical for closed-loop control timing predictability |
| Dual single-ended inputs with MUX | Internal 2:1 analog multiplexer allows interleaved sampling of two sensors without external switching components or layout complexity |
| Variable I/O voltage (1.5V–3.6V) | OVDD pin enables direct interfacing to 1.5V, 1.8V, 2.5V, or 3.0V microcontrollers - eliminates level-shifter components |
| Low-noise 73 dB SNR | Optimized analog front-end achieves 72.5 dB typical SNR at 250 kHz - suitable for high-resolution temperature, pressure, and current sensing |
| Automotive-grade qualification | /V suffix confirms AEC-Q100 Grade 1 qualification (-40°C to +125°C), including HTOL, ESD, and thermal cycling validation |
Applications
| Automotive Sensor Interface | Industrial Process Monitoring |
|---|---|
|
Use Scenario: Digitizing outputs from dual-axis MEMS accelerometers and pressure transducers in engine control units. IC Role / Device Role / Timing Role: Dual-channel 12-bit ADC performing synchronized sampling at 500 ksps with <4 ns aperture delay for phase-coherent vibration analysis. Use Value: Eliminates need for two separate ADCs or external MUX, reducing BOM count and PCB area while maintaining channel matching within ±0.4 LSB offset. |
Use Scenario: High-accuracy analog input module for programmable logic controller (PLC) analog input cards. IC Role / Device Role / Timing Role: Precision ADC converting 4–20 mA loop signals and thermocouple outputs with external reference for ratiometric accuracy. Use Value: External REF pin enables traceable calibration against stable voltage references, achieving <±1 LSB total unadjusted error over industrial temperature range. |
| Portable Medical Instrumentation | Battery-Powered Data Loggers |
|
Use Scenario: Signal acquisition in handheld ECG monitors requiring low-noise, low-power analog front-end. IC Role / Device Role / Timing Role: 12-bit ADC capturing biopotential waveforms with 72.5 dB SNR and 1.3 µA power-down current for extended battery life. Use Value: Ultra-low standby current extends operating time between charges; µMAX-EP package fits compact wearable form factors. |
Use Scenario: Environmental sensor node logging temperature, humidity, and gas concentration over weeks on coin-cell power. IC Role / Device Role / Timing Role: Low-power ADC performing periodic wake-up conversions with fast 1-cycle power-up time and minimal quiescent draw. Use Value: Full power-down mode reduces average current to sub-microamp level, enabling multi-year deployment without battery replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 8-channel, SPI interface; 1 MSPS; requires external reference; no OVDD pin; 32-pin VQFN | Higher channel count and speed, but larger footprint and higher power (1.2 mW active); lacks automotive qualification | Select for multi-sensor systems needing >2 channels; avoid where AEC-Q100 compliance or µMAX size is mandatory |
| AD7476AWRMZ-REEL | 12-bit, single-channel, 1 MSPS; no external REF; 6-pin SOT-23; 2.7–5.25 V supply; no OVDD | Smaller package and lower cost, but no dual-channel capability, no external reference, and no automotive grade | Select for cost-sensitive, single-input designs where temperature range is limited to -40°C to +85°C |
Compared with ADS7953IRHBT and AD7476AWRMZ-REEL, the MAX11666AUB/V+T uniquely balances dual-channel 12-bit precision, automotive qualification, variable I/O voltage, and ultra-small µMAX-EP packaging - making it optimal for space- and reliability-constrained embedded sensor nodes.
Availability
MAX11666AUB/V+T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial process monitoring, portable medical instrumentation, and battery-powered data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX11666AUB/V+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 demanding industrial, automotive, and communications applications.
The MAX11666AUB/V+T belongs to the MAX11661–MAX11666 family of low-power, high-speed SAR ADCs engineered specifically for battery-operated and automotive-qualified signal acquisition where size, accuracy, and temperature resilience are critical.
FAQ
What is the maximum sampling rate supported by the MAX11666AUB/V+T?
The MAX11666AUB/V+T supports a maximum throughput rate of 500 ksps, achieved with an 8 MHz SCLK and 1.56 µs conversion time. This rate is guaranteed across the full -40°C to +125°C operating range and enables full-linear bandwidth up to 2.5 MHz (SINAD > 68 dB). The device maintains this performance without pipeline delay, ensuring deterministic timing for real-time control loops.
Does the MAX11666AUB/V+T require an external reference voltage?
Yes, the MAX11666AUB/V+T requires an external reference voltage applied to the REF pin. It accepts 1 V to VDD + 0.05 V and is designed for use with precision external references to achieve optimal DC accuracy and ratiometric measurement capability. Unlike single-channel variants (e.g., MAX11665), it does not generate an internal reference - this design choice enables higher accuracy and flexibility in automotive and industrial applications.
What is the purpose of the OVDD pin on the MAX11666AUB/V+T?
The OVDD pin on the MAX11666AUB/V+T supplies power to the digital I/O interface (SCLK, CS, CHSEL, DOUT), allowing independent voltage scaling from 1.5 V to 3.6 V. This enables direct connection to low-voltage microcontrollers (e.g., 1.8 V or 2.5 V logic) without level shifters, while maintaining full analog performance. OVDD isolation also prevents digital switching noise from coupling into the sensitive analog section powered by VDD.
How does the MAX11666AUB/V+T handle dual-channel sampling?
The MAX11666AUB/V+T uses an internal 2:1 analog multiplexer controlled by the CHSEL pin to select between AIN1 and AIN2. When CHSEL is low, AIN1 is sampled; when high, AIN2 is sampled. Both channels share identical DC and dynamic specifications - including ±0.4 LSB channel-to-channel offset matching and ±0.05 LSB gain matching - enabling precise differential or sequential measurements without external calibration.
Is the MAX11666AUB/V+T qualified for automotive applications?
Yes, the /V suffix in MAX11666AUB/V+T explicitly denotes AEC-Q100 Grade 1 qualification (-40°C to +125°C), including stress testing for high-temperature operating life (HTOL), electrostatic discharge (ESD), and thermal cycling. This makes it suitable for under-hood, ADAS, and body electronics applications where reliability across extreme environmental conditions is mandatory.
MAX11666AUB/V+T 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:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 2
- 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:
- Supply
- 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:
- -
MAX11666AUB/V+T FAQ
1.How can I place an order for MAX11666AUB/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11666AUB/V+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 MAX11666AUB/V+T reliable?
The price and inventory of MAX11666AUB/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11666AUB/V+T is usually 5 days.
3.What payment methods are accepted for MAX11666AUB/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11666AUB/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11666AUB/V+T?
MAX11666AUB/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11666AUB/V+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 MAX11666AUB/V+T?
For technical support, including MAX11666AUB/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11666AUB/V+T requirements.
6.How does Aetrix verify that MAX11666AUB/V+T is sourced from the original manufacturer or authorized distributors?
All MAX11666AUB/V+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 MAX11666AUB/V+T meets industry standards.
7.What is the process for return or replacement of MAX11666AUB/V+T?
All MAX11666AUB/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11666AUB/V+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 MAX11666AUB/V+T part is unused and in its original packaging.
Return procedure for MAX11666AUB/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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