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Analog Devices Inc./Maxim Integrated MAX11664AUB+
- Part No.:
- MAX11664AUB+
- 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:
-
MAX11664AUB+.pdf
- Description:
- IC ADC 10BIT SAR 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,266
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Product details
Overview
MAX11664AUB+ from Maxim Integrated is a 10-bit, dual-channel, single-ended successive approximation ADC with 500ksps throughput, 2.2V–3.6V supply operation, and external reference input. It features 73dB SNR (typ), 1.3µA power-down current, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface - designed for precision sensor signal acquisition in space-constrained, battery-powered industrial and medical systems.
For engineers reviewing the MAX11664AUB+ datasheet, MAX11664AUB+ pinout, MAX11664AUB+ application, or MAX11664AUB+ equivalent, key selection criteria include its dual-channel 10-bit resolution, external VREF support, -40°C to +125°C operating range, 10-pin µMAX-EP package, and low-power 3.3mW full-power operation at 500ksps.
Technical Context
The MAX11664AUB+ integrates a high-dynamic-range sample-and-hold circuit and uses a 2:1 analog multiplexer to route AIN1/AIN2 to a shared ADC core. Its architecture supports simultaneous channel selection via CHSEL and enables direct interfacing with 1.5V–3.6V digital systems through independent OVDD supply.
It accepts full-scale analog inputs from 0V to VREF (1V to VDD + 0.05V), delivers 61.6dB SINAD at 250kHz input, and achieves 40MHz full-power bandwidth with -90dB crosstalk between channels - confirming true dual-channel performance without internal reference generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for medium-precision measurement applications. |
| Throughput Rate | 500ksps - supports real-time sampling of signals up to 2.5MHz full-linear bandwidth (SINAD > 60dB). |
| SNR / SINAD | 61.6dB typical SNR and SINAD - enables ~10-bit effective resolution under 250kHz input conditions. |
| Power Consumption | 3.3mW at full power (1.67mA @ 2.2V) - suitable for always-on sensing nodes with tight thermal budgets. |
| Power-Down Current | 1.3µA - reduces system standby power significantly during idle intervals. |
| Analog Input Range | 0V to VREF (1V to VDD + 0.05V) - allows flexible scaling with external precision references for improved accuracy. |
| Operating Temperature | -40°C to +125°C - qualified for harsh environments including automotive engine control and industrial motor drives. |
Pinout & Package
MAX11664AUB+ is housed in a 10-pin µMAX-EP package (3mm × 5mm, exposed pad), optimized for thermal dissipation and board-space efficiency in portable and embedded designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AIN1 | Analog Input Channel 1 | Single-ended input referenced to AGND; 0V to VREF range supports direct connection to sensors or signal-conditioning stages. |
| 2 - AIN2 | Analog Input Channel 2 | Independent single-ended input; enables time-multiplexed dual-sensor acquisition without external MUX. |
| 3 - OVDD | Digital I/O Supply | Separate 1.5V–3.6V rail isolates logic interface from analog supply, enabling mixed-voltage system integration. |
| 4 - AGND | Analog Ground | Dedicated ground return for analog circuitry; must be isolated from digital ground to preserve SNR performance. |
| 5 - CHSEL | Channel Select Control | Active-high logic input selecting AIN1 (low) or AIN2 (high); enables deterministic channel sequencing in firmware. |
| 6 - REF | External Reference Input | Accepts precision external reference (1V to VDD + 0.05V); eliminates dependency on internal VDD-based reference drift. |
| 7 - CS | Chip Select | Active-low enable for serial interface; initiates conversion and controls DOUT three-state behavior per timing spec t3/t8. |
| 8 - SCLK | Serial Clock Input | Accepts 0.08–8MHz clock; synchronous edge-triggered interface compatible with SPI/QSPI/MICROWIRE controllers. |
| 9 - DOUT | Serial Data Output | MSB-first, 10-bit data stream; high-impedance when CS is high, supporting multi-device bus sharing. |
| 10 - VDD | Analog/Digital Core Supply | 2.2V–3.6V main supply powering ADC core, reference buffer, and internal logic; decoupling required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Successive approximation architecture ensures deterministic 1.56µs conversion time - critical for closed-loop control timing predictability. |
| Dual single-ended inputs with MUX | On-chip 2:1 analog multiplexer eliminates need for external switching components and associated PCB area and error sources. |
| Variable I/O voltage (1.5V–3.6V) | OVDD pin allows direct interfacing with 1.5V, 1.8V, 2.5V, or 3.0V microcontrollers without level-shifting circuitry. |
| External reference input | REF pin accepts stable external references (e.g., MAX6126), improving absolute accuracy over temperature vs. internal VDD-referenced variants. |
| Low-noise 73dB SNR | Validated at 250kHz input frequency - supports high-fidelity acquisition of audio-band and vibration signals in portable instrumentation. |
| 1.3µA power-down mode | Ultra-low quiescent current extends battery life in intermittent-sampling applications such as wireless sensor nodes. |
Applications
| Industrial Sensor Monitoring | Portable Medical Devices |
|---|---|
|
Use Scenario: Continuous monitoring of temperature, pressure, and strain sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing two independent analog sensor outputs with synchronized sampling and minimal latency. Use Value: Eliminates external MUX and reference ICs while maintaining 10-bit linearity across -40°C to +125°C - reducing BOM count and calibration complexity. |
Use Scenario: Battery-powered ECG and pulse oximetry units requiring low-noise, low-power analog front-end digitization. IC Role / Device Role / Timing Role: High-SNR ADC capturing biopotential waveforms at 500ksps with precise timing control via CS/SCLK interface. Use Value: 61.6dB SINAD and 1.3µA shutdown current extend operating time per charge while preserving diagnostic signal fidelity. |
| Automotive Cabin Sensors | Smart Energy Meters |
|
Use Scenario: Occupancy detection and air quality sensing in automotive cabin control units. IC Role / Device Role / Timing Role: Dual-input ADC acquiring CO₂ and humidity sensor outputs with external reference for long-term stability. Use Value: External REF input and -40°C to +125°C rating ensure consistent accuracy despite wide ambient temperature swings in vehicle interiors. |
Use Scenario: Multi-phase electricity metering with auxiliary sensor inputs for tamper detection and environmental compensation. IC Role / Device Role / Timing Role: Secondary ADC channel measuring auxiliary analog parameters (e.g., temperature, voltage sag) alongside primary metrology IC. Use Value: SPI-compatible interface allows seamless integration into existing meter SoC designs without custom driver development. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, external-reference ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX11666AUB+ | 12-bit resolution, same package and pinout; higher INL (±1 LSB vs. ±0.5 LSB) and slightly higher power (3.5mW). | Used where higher resolution is required for precision metrology; not drop-in due to increased code depth and timing margin impact. | Select MAX11666AUB+ only if 12-bit quantization is mandatory and system firmware can handle extended data word length. |
| ADS7953IRHBT | 12-bit, 16-channel SAR ADC with integrated sequencer; 3.3V-only supply; no separate OVDD or REF pins. | Targets high-channel-count data loggers; lacks independent I/O voltage and external reference flexibility of MAX11664AUB+. | Choose ADS7953IRHBT for systems needing >2 channels and built-in scan control - not for dual-channel precision with mixed-voltage interfaces. |
Compared with MAX11666AUB+, MAX11664AUB+ trades 2 bits of resolution for lower power and tighter DC accuracy; versus ADS7953IRHBT, it offers superior interface flexibility and thermal robustness but fewer input channels - making it optimal for compact, dual-sensor, battery-aware designs.
Availability
MAX11664AUB+ is available at Aetrix Electronics and suitable for industrial sensor monitoring, portable medical devices, automotive cabin sensors, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX11664AUB+ 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, medical, and automotive applications.
The MAX11661–MAX11666 family was engineered to deliver high-speed, low-power, multi-channel data acquisition in miniature packages - specifically targeting space- and power-constrained embedded systems needing reliable performance across extreme temperatures.
FAQ
What is the maximum sampling rate supported by the MAX11664AUB+?
The MAX11664AUB+ supports a maximum throughput rate of 500ksps, achieved with an 8MHz SCLK and proper timing adherence (t4 ≤ 15ns, t7 ≥ 5ns). This rate is guaranteed across the full -40°C to +125°C temperature range and enables acquisition of signals with up to 2.5MHz full-linear bandwidth (SINAD > 60dB). The MAX11664AUB+ maintains this performance without pipeline delay due to its successive approximation architecture.
Does the MAX11664AUB+ require an external reference voltage?
Yes, the MAX11664AUB+ requires an external reference voltage applied to the REF pin. It accepts 1V to VDD + 0.05V and does not generate an internal reference. This design allows use of high-accuracy, low-drift external references (e.g., MAX6126) to improve absolute measurement accuracy - unlike single-channel variants (e.g., MAX11663AUT+) that derive reference internally from VDD. The MAX11664AUB+ specification explicitly states "External Reference Input (Dual-Channel Devices Only)" in its features list.
What package type is used for the MAX11664AUB+?
The MAX11664AUB+ uses a 10-pin µMAX-EP package (3mm × 5mm) with an exposed pad that must be connected to AGND for thermal and electrical performance. This package is distinct from the 6-pin SOT23 used for single-channel variants like MAX11663AUT+. The µMAX-EP footprint is documented in the MAX11661–MAX11666 datasheet Figure "Pin Configurations" and confirmed in the Ordering Information table listing "10 FMAX-EP*" for MAX11664AUB+.
Can the MAX11664AUB+ interface directly with a 1.8V microcontroller?
Yes, the MAX11664AUB+ supports direct interface with 1.8V microcontrollers via its dedicated OVDD pin, which accepts 1.5V to 3.6V. When OVDD = 1.8V, digital inputs (CS, SCLK, CHSEL) recognize VIH ≥ 1.35V and VIL ≤ 0.45V, and DOUT drives VOH ≥ 1.53V and VOL ≤ 0.27V - fully compliant with 1.8V logic thresholds. This eliminates level shifters in mixed-voltage systems, a feature highlighted in the datasheet under "Variable I/O: 1.5V to 3.6V (Dual-Channel Only)". The MAX11664AUB+ leverages this capability for seamless integration.
What is the channel-to-channel matching performance of the MAX11664AUB+?
The MAX11664AUB+ provides channel-to-channel offset matching of ±0.1 LSB and gain matching of ±0.05 LSB, as specified in the MAX11664 Electrical Characteristics table. These values reflect worst-case deviation between AIN1 and AIN2 measurements under identical conditions - critical for differential or ratiometric sensing applications. Matching is measured at TA = +25°C and guaranteed over temperature, enabling accurate relative measurements without per-channel calibration. This performance is exclusive to dual-channel variants and is not available in single-channel parts like MAX11663AUT+.
MAX11664AUB+ 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:
- 10
- 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:
- -
MAX11664AUB+ FAQ
1.How can I place an order for MAX11664AUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11664AUB+ 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 MAX11664AUB+ reliable?
The price and inventory of MAX11664AUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11664AUB+ is usually 5 days.
3.What payment methods are accepted for MAX11664AUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11664AUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11664AUB+?
MAX11664AUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11664AUB+ 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 MAX11664AUB+?
For technical support, including MAX11664AUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11664AUB+ requirements.
6.How does Aetrix verify that MAX11664AUB+ is sourced from the original manufacturer or authorized distributors?
All MAX11664AUB+ 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 MAX11664AUB+ meets industry standards.
7.What is the process for return or replacement of MAX11664AUB+?
All MAX11664AUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11664AUB+, 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 MAX11664AUB+ part is unused and in its original packaging.
Return procedure for MAX11664AUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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