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Analog Devices Inc./Maxim Integrated MAX11662AUB+T
- Part No.:
- MAX11662AUB+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:
-
MAX11662AUB+T.pdf
- Description:
- IC ADC 8BIT SAR 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,232
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Product details
Overview
MAX11662AUB+T 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, battery-powered data acquisition in portable instrumentation and sensor interfaces.
For engineers reviewing the MAX11662AUB+T datasheet, MAX11662AUB+T pinout, MAX11662AUB+T application, or MAX11662AUB+T equivalent, key selection considerations include its 8-bit resolution with ±0.25 LSB INL/DNL, 49.7dB SNR at 250kHz input, dual-channel crosstalk of –90dB, 1.3µA power-down current, and 10-pin FMAX-EP package with exposed pad grounded per spec.
Technical Context
The MAX11662AUB+T implements a successive approximation register (SAR) architecture with internal sample-and-hold and a 2:1 analog multiplexer selecting between AIN1 and AIN2. Conversion is initiated by CS falling edge, with aperture delay of 4ns and jitter of 15ps - enabling precise timing-critical sampling in high-speed sensor systems.
Its digital interface operates with independent OVDD (1.5V–3.6V), allowing direct connection to 1.5V/1.8V/2.5V/3.0V logic without level shifters. The REF pin accepts 1V to (VDD + 0.05V), supporting flexible external reference sourcing while maintaining full-scale linearity across the operating temperature range (–40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - delivers 256 discrete output codes with no missing codes guaranteed. |
| Throughput Rate | 500 ksps - supports real-time sampling of signals up to 250 kHz Nyquist bandwidth. |
| INL / DNL | ±0.25 LSB - ensures monotonicity and ≤0.1% full-scale linearity error over temperature. |
| SNR | 49.7 dB typical at 250 kHz - enables ~8.0 effective number of bits (ENOB) in mid-frequency applications. |
| Power Consumption | 3.3 mW at full operation (1.67 mA @ 2.2V VDD) - optimized for ultra-low-power battery operation. |
| Power-Down Current | 1.3 µA - reduces system standby power in intermittent-sampling architectures. |
| Crosstalk | –90 dB - isolates AIN1 and AIN2 channels, critical for multi-sensor simultaneous sampling. |
Pinout & Package
The MAX11662AUB+T is housed in a 10-pin FMAX® package (3mm × 5mm) with exposed thermal pad (EP) that must be soldered to ground for proper operation and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AIN1 | Analog Input Channel 1 | Single-ended input referenced to AGND; 0V to VREF range; 20pF track capacitance. |
| 2 - AIN2 | Analog Input Channel 2 | Second single-ended input; shares same reference and MUX path as AIN1; –90dB crosstalk isolation. |
| 3 - OVDD | Digital I/O Supply | Independent 1.5V–3.6V supply for SCLK/CS/DOUT - enables mixed-voltage system interfacing. |
| 4 - AGND | Analog Ground | Separate ground return for analog circuitry; must be tied to system ground with low-impedance path. |
| 5 - CHSEL | Channel Select Control | Logic input selecting AIN1 (low) or AIN2 (high); enables software-controlled dual-channel sequencing. |
| 6 - REF | External Reference Input | Accepts precision voltage reference (1V to VDD+0.05V); defines full-scale range and directly impacts gain accuracy. |
| 7 - CS | Chip Select | Active-low conversion trigger; falling edge initiates acquisition; tQ = 4ns quiet time required before SCLK. |
| 8 - SCLK | Serial Clock Input | Supports 0.08–8 MHz clock; 40–60% duty cycle; controls data transfer timing and conversion rate. |
| 9 - DOUT | Serial Data Output | 3-state CMOS output; high-impedance when CS high; VOH/VOL specified relative to OVDD. |
| 10 - VDD | Analog/Digital Core Supply | Main 2.2V–3.6V supply powering ADC core, reference buffer, and internal logic; IVDD = 1.67 mA typical. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture delivers first valid conversion result within one clock cycle after CS assertion - essential for deterministic control loops. |
| Dual single-ended inputs with MUX | Integrated 2:1 analog switch eliminates need for external multiplexer and associated board area, BOM cost, and signal path mismatch. |
| Variable I/O voltage (1.5V–3.6V) | OVDD pin allows direct interfacing with 1.5V/1.8V/2.5V/3.0V microcontrollers without level-shifting components. |
| External reference input | REF pin supports precision external references (e.g., MAX6126) to improve absolute accuracy beyond internal VDD-based scaling. |
| Ultra-low power-down current | 1.3 µA shutdown current enables >1-year battery life in wake-on-event sensor nodes with infrequent sampling. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with dual electrochemical sensor inputs requiring synchronized sampling and low quiescent power. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing analog outputs from two amperometric sensors; CHSEL toggled per measurement cycle to alternate channels. Use Value: –90dB crosstalk prevents cross-interference between sensor channels; 1.3µA power-down extends coin-cell lifetime beyond 18 months. | Use Scenario: Environmental monitoring node logging temperature, humidity, and CO₂ every 10 seconds using discrete analog sensors. IC Role / Device Role / Timing Role: Central ADC acquiring conditioned analog outputs from multiple sensors via external analog switch or direct connection to AIN1/AIN2. Use Value: 500ksps throughput allows oversampling for noise reduction; 2.2V–3.6V VDD range matches Li-ion/Li-SOCl₂ battery discharge profile. |
| Automotive Cabin Sensors | Industrial Predictive Maintenance Nodes |
Use Scenario: Occupancy detection module using IR and capacitive proximity sensors in automotive cabin, operating across –40°C to +125°C. IC Role / Device Role / Timing Role: High-temperature-stable ADC converting dual sensor outputs for occupancy classification algorithm. Use Value: Guaranteed operation to +125°C; ±0.25 LSB INL maintains calibration integrity over full automotive temperature range. | Use Scenario: Vibration sensor node on rotating machinery capturing acceleration waveforms for FFT-based fault analysis. IC Role / Device Role / Timing Role: High-fidelity front-end ADC sampling piezoelectric sensor output at 250kHz with minimal harmonic distortion. Use Value: 49.7dB SNR and –75dB THD support ≥8-bit ENOB for reliable spectral feature extraction in edge analytics. |
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, 200ksps, single-supply (2.7–5.25V), no OVDD pin, internal reference only | Lacks dual-channel MUX and external REF; requires higher VDD; lower throughput limits high-frequency sensing | Select when system uses 3.3V-only logic and does not require channel switching or precision external reference. |
| AD7476ARTZ-REEL7 | 12-bit, 1MSPS, single-channel, 2.35–5.25V supply, SPI-only interface | Higher resolution but no dual-input capability; no CHSEL or REF pins; larger 6-lead SOT-23 footprint | Choose for single-sensor, higher-accuracy applications where channel count and low-voltage I/O flexibility are secondary. |
Compared with ADS7822U and AD7476ARTZ-REEL7, the MAX11662AUB+T uniquely combines dual-channel MUX, external reference support, variable OVDD, and guaranteed –40°C to +125°C operation - making it optimal for compact, multi-sensor, battery-powered industrial and automotive endpoints.
Availability
MAX11662AUB+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, automotive cabin monitoring, and industrial predictive maintenance nodes requiring stable component supply, extended temperature operation, and long-term production continuity.
Supply support for MAX11662AUB+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 medical applications.
The MAX1166x family targets ultra-low-power, small-footprint data acquisition systems - specifically engineered for battery-operated instrumentation where resolution, speed, and supply flexibility must coexist within tight thermal and board-area constraints.
FAQ
What is the maximum sampling rate supported by the MAX11662AUB+T?
The MAX11662AUB+T supports a maximum throughput rate of 500 ksps, achieved with an 8 MHz SCLK and proper timing margins. Its conversion time is fixed at 1.56 µs, and acquisition time is 52 ns - enabling reliable sampling of signals up to 250 kHz (Nyquist-limited). This rate is maintained across the full –40°C to +125°C temperature range and 2.2V–3.6V supply range.
Does the MAX11662AUB+T require an external reference voltage?
Yes, the MAX11662AUB+T requires an external reference voltage applied to the REF pin, which sets the full-scale input range (0V to VREF) for both AIN1 and AIN2. The REF pin accepts 1V to (VDD + 0.05V); it cannot operate with internal reference - unlike single-channel variants such as MAX11661. Using a precision external reference (e.g., MAX6126) improves absolute accuracy and temperature stability of the MAX11662AUB+T.
How is channel selection implemented on the MAX11662AUB+T?
Channel selection on the MAX11662AUB+T is controlled by the CHSEL pin: logic low selects AIN1, and logic high selects AIN2. This pin is sampled at the falling edge of CS to determine which analog input is acquired during the subsequent conversion cycle. No SPI command or register write is needed - simplifying firmware and eliminating protocol overhead in resource-constrained microcontrollers interfacing with the MAX11662AUB+T.
What is the purpose of the OVDD pin on the MAX11662AUB+T?
The OVDD pin on the MAX11662AUB+T supplies power to the digital I/O circuitry (SCLK, CS, CHSEL, DOUT), decoupled from the analog VDD domain. It accepts 1.5V to 3.6V, enabling direct interface with 1.5V, 1.8V, 2.5V, or 3.0V logic families without level shifters. This separation improves noise immunity and simplifies system-level voltage domain management in mixed-supply designs using the MAX11662AUB+T.
Is the exposed pad (EP) on the MAX11662AUB+T package required to be connected to ground?
Yes - the exposed pad (EP) on the MAX11662AUB+T's 10-pin FMAX package must be soldered to a solid ground plane. Maxim explicitly states "DEVICES DO NOT OPERATE WHEN EP IS NOT CONNECTED TO GROUND!" This connection provides critical thermal dissipation and analog ground integrity; omitting it causes functional failure and violates Absolute Maximum Ratings. Proper EP grounding is mandatory for reliable operation of the MAX11662AUB+T.
MAX11662AUB+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:
- 8
- 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:
- 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+T FAQ
1.How can I place an order for MAX11662AUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11662AUB+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 MAX11662AUB+T reliable?
The price and inventory of MAX11662AUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11662AUB+T is usually 5 days.
3.What payment methods are accepted for MAX11662AUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11662AUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11662AUB+T?
MAX11662AUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11662AUB+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 MAX11662AUB+T?
For technical support, including MAX11662AUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11662AUB+T requirements.
6.How does Aetrix verify that MAX11662AUB+T is sourced from the original manufacturer or authorized distributors?
All MAX11662AUB+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 MAX11662AUB+T meets industry standards.
7.What is the process for return or replacement of MAX11662AUB+T?
All MAX11662AUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX11662AUB+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 MAX11662AUB+T part is unused and in its original packaging.
Return procedure for MAX11662AUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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