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Analog Devices Inc./Maxim Integrated MAX1106CUB+
- Part No.:
- MAX1106CUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1106CUB+.pdf
- Description:
- IC ADC 8BIT SAR 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,682
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Product details
Overview
The MAX1106CUB+ from Maxim Integrated is a low-power, single-supply, 8-bit successive-approximation ADC with integrated track/hold, internal +2.048V reference, SPI/QSPI/MICROWIRE-compatible 3-wire serial interface, and pin-selectable unipolar single-ended or pseudo-differential operation. It operates from +2.7V to +3.6V, draws only 96µA at 25ksps, and delivers ±0.15 LSB INL over temperature - ideal for portable data loggers and hand-held medical instruments requiring compact, battery-efficient signal digitization.
For engineers reviewing the MAX1106CUB+ datasheet, MAX1106CUB+ pinout, MAX1106CUB+ application, or MAX1106CUB+ equivalent, key selection criteria include its 25ksps conversion rate with 35µs guaranteed tCONV, 0.5µA shutdown current, 1.5MHz small-signal input bandwidth, and µMAX-10 package compatibility with space-constrained embedded sensor interfaces.
Technical Context
The MAX1106CUB+ employs a charge-redistribution SAR architecture with an integrated auto-zeroed track/hold circuit that acquires signals in ≤1µs (typical) and holds during conversion. Its internal 2.048V bandgap reference is buffered at REFOUT and can be used directly via REFIN connection or replaced by an external 1V–VDD reference.
Digital control is implemented via three dedicated pins: CONVST initiates conversion on falling edge after ≥1µs high pulse; SCLK clocks out 8-bit MSB-first data on falling edges up to 2MHz; SHDN enables 0.5µA power-down mode with 12ms wake-up time when using internal reference. The interface requires no external logic for SPI/QSPI/MICROWIRE host connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit SAR - delivers discrete digital output with 256 distinct codes for basic sensor digitization tasks |
| Conversion Rate | 25ksps maximum - supports real-time sampling of audio-band and industrial control signals |
| INL | ±0.15 LSB (typ), ±0.5 LSB (max) - ensures monotonicity and <0.06% full-scale linearity error across temperature |
| Supply Current | 96µA at 3V/25ksps - enables multi-year operation from coin-cell batteries in remote monitoring systems |
| Shutdown Current | 0.5µA - reduces average power by >99% between conversions in duty-cycled applications |
| Input Bandwidth | 1.5MHz small-signal - allows undersampling of RF or transient events without external anti-alias filter |
| Reference Voltage | +2.048V internal (REFOUT→REFIN) - provides precise, temperature-stable scaling with ±50ppm/°C tempco |
Pinout & Package
The MAX1106CUB+ is housed in a 10-pin µMAX package (3mm × 3mm, 0.5mm pitch), offering 20% footprint vs. 8-pin DIP and thermal performance suitable for handheld devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply rail | Accepts +2.7V to +3.6V; powers analog core, reference, and digital interface |
| IN+ (Pin 2) | Positive analog input | Sampled node; full-scale range = GND to VDD when using internal reference |
| IN− (Pin 3) | Negative analog input | Common-mode reference; must remain stable within ±0.1LSB for pseudo-differential accuracy |
| GND (Pin 4) | Analog/digital ground | Single ground plane required; decoupling capacitor placed adjacent to VDD/GND pins |
| REFOUT (Pin 5) | Internal reference output | 2.048V buffered source; requires 1µF bypass to GND for stability and noise rejection |
| REFIN (Pin 6) | Reference voltage input | Connects to REFOUT for internal reference use; accepts 1V–VDD external references |
| CONVST (Pin 7) | Conversion start trigger | Active-high pulse ≥1µs initiates autozero; falling edge starts conversion sequence |
| SHDN (Pin 8) | Active-low shutdown enable | Pulling low disables bias circuits and forces DOUT into high-Z; wake-up requires 12ms for internal reference settle |
| DOUT (Pin 9) | Serial data output | Three-state, MSB-first output clocked on SCLK falling edge; goes high-Z after 8th bit |
| SCLK (Pin 10) | Serial clock input | Accepts up to 2MHz clock; timing-critical for data readout; must stay low during conversion for best SNR |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | Eliminates need for negative rails or level shifters in battery-powered systems |
| Integrated track/hold | Removes requirement for external hold capacitor and driver op-amp, reducing BOM count and layout area |
| Pin-programmable configuration | Enables field-selectable unipolar single-ended or pseudo-differential mode without firmware change |
| SPI/QSPI/MICROWIRE compatibility | Direct interface to common microcontroller peripherals without glue logic or protocol translation |
| Small 10-pin µMAX package | 3mm × 3mm footprint supports ultra-compact PCB designs in wearables and portable diagnostics |
Applications
| Portable Data Logging | Hand-Held Measurement Devices |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and light levels every 10 seconds. IC Role / Device Role / Timing Role: Digitizes analog sensor outputs with minimal power overhead; internal reference ensures consistent scaling across operating voltage range. Use Value: 96µA active current and 0.5µA shutdown extend battery life to >5 years on a CR2032 cell in 99.9% duty-cycled operation. | Use Scenario: Pocket-sized multimeter acquiring voltage, current, and resistance readings with LCD display update. IC Role / Device Role / Timing Role: Provides fast 25ksps sampling for AC waveform capture and RMS calculation; pseudo-differential mode rejects common-mode noise from probe leads. Use Value: 1.5MHz input bandwidth enables true-RMS measurement of 60Hz–1kHz signals without external anti-alias filter. |
| Medical Instruments | System Diagnostics |
Use Scenario: Portable ECG front-end amplifying and digitizing lead-II differential signals for arrhythmia detection. IC Role / Device Role / Timing Role: Converts conditioned biopotential signals with ±0.15 LSB INL to preserve diagnostic waveform fidelity. Use Value: Internal 2.048V reference eliminates drift-induced baseline shift in long-duration recordings. | Use Scenario: Industrial PLC module monitoring motor winding voltages and currents for predictive maintenance alerts. IC Role / Device Role / Timing Role: Interfaces to isolation amplifiers and shunt resistors; SPI interface synchronizes with controller's scan cycle. Use Value: Pin-selectable configuration allows reuse across voltage-sense (single-ended) and current-sense (pseudo-diff) channels on same PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.7V–5.25V supply; 1MSPS max rate; no internal reference; requires external 2.5V ref | Better speed but higher power (1.2mA); needs precision external reference and decoupling | Select when >25ksps sampling or tighter DC accuracy (±0.5 LSB INL) is required, and board space allows external ref |
| TLV2541CD | 2.7V–5.5V supply; 200ksps; internal 2.5V ref; SPI-only (no QSPI/MICROWIRE) | Higher resolution option (10-bit) with similar power; lacks pseudo-differential input flexibility | Choose for upgrade path to 10-bit precision in same µSO-8 footprint, where single-ended inputs suffice |
Compared with ADS7822U and TLV2541CD, the MAX1106CUB+ offers lowest quiescent current (96µA vs. 1.2mA/1.5mA), built-in 2.048V reference with 50ppm/°C stability, and broader digital interface compatibility - making it optimal for ultra-low-power, space-constrained, and multi-protocol embedded systems.
Availability
MAX1106CUB+ is available at Aetrix Electronics and suitable for portable data logging, hand-held measurement devices, and medical instruments requiring stable component supply with long-term manufacturability.
Supply support for MAX1106CUB+ 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 industrial, medical, and communications applications.
The MAX1106CUB+ belongs to Maxim's low-power serial ADC product line, engineered specifically for battery-operated instrumentation where size, power, and ease of microcontroller integration are critical.
FAQ
What is the maximum sampling rate supported by the MAX1106CUB+?
The MAX1106CUB+ guarantees a maximum conversion rate of 25ksps, corresponding to a worst-case conversion time (tCONV) of 35µs. This is achieved using the internal 400kHz oscillator; external clocking is not supported. At lower rates, power-down mode can be inserted between conversions to reduce average current draw significantly.
Does the MAX1106CUB+ require an external reference voltage?
No - the MAX1106CUB+ includes an internal +2.048V bandgap reference accessible at REFOUT. To use it, connect REFOUT to REFIN and bypass REFOUT with a 1µF capacitor to GND. An external reference from 1V to VDD may also be applied directly to REFIN for improved accuracy or different full-scale ranges.
How does the pseudo-differential input mode work on the MAX1106CUB+?
In pseudo-differential mode, only IN+ is sampled and held; IN− serves as a stable common-mode reference. For ±0.5LSB accuracy, IN− must remain within ±0.1LSB of GND during conversion. A 0.1µF capacitor from IN− to GND is recommended to suppress noise, especially when using DC bias at IN−.
What is the wake-up time from shutdown for the MAX1106CUB+?
When exiting shutdown (SHDN pulled high), the MAX1106CUB+ requires 12ms for the internal reference to fully stabilize if it was fully discharged. With partial discharge or when using an external reference, wake-up can be as fast as 20µs. After wake-up, allow ≥1µs CONVST high pulse before initiating conversion.
Can the MAX1106CUB+ interface directly with a 5V microcontroller SPI port?
Yes - the MAX1106CUB+ digital inputs (SCLK, CONVST, SHDN) accept logic levels compatible with both 3V and 5V systems regardless of VDD (2.7V–3.6V). DOUT output is CMOS-level with VOH ≥ VDD − 0.5V and VOL ≤ 0.4V, so a level shifter is not required for 5V MCU interfacing.
MAX1106CUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 25k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential, 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, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 10-uMAX/uSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1106CUB+ FAQ
1.How can I place an order for MAX1106CUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1106CUB+ 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 MAX1106CUB+ reliable?
The price and inventory of MAX1106CUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1106CUB+ is usually 5 days.
3.What payment methods are accepted for MAX1106CUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1106CUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1106CUB+?
MAX1106CUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1106CUB+ 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 MAX1106CUB+?
For technical support, including MAX1106CUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1106CUB+ requirements.
6.How does Aetrix verify that MAX1106CUB+ is sourced from the original manufacturer or authorized distributors?
All MAX1106CUB+ 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 MAX1106CUB+ meets industry standards.
7.What is the process for return or replacement of MAX1106CUB+?
All MAX1106CUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1106CUB+, 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 MAX1106CUB+ part is unused and in its original packaging.
Return procedure for MAX1106CUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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