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Analog Devices Inc./Maxim Integrated MAX1109EUB+T
- Part No.:
- MAX1109EUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1109EUB+T.pdf
- Description:
- IC ADC 8BIT SAR 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,714
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Product details
Overview
MAX1109EUB+T from Maxim Integrated is a low-power, 8-bit, dual-channel successive-approximation ADC with internal track/hold, +4.096V reference, SPI/QSPI/MICROWIRE-compatible 4-wire serial interface, and software-configurable unipolar/bipolar input modes. It operates from +4.5V to +5.5V, consumes 130µA at 50ksps, and supports battery monitoring in portable data loggers and solar-powered remote systems.
For engineers reviewing the MAX1109EUB+T datasheet, MAX1109EUB+T pinout, MAX1109EUB+T application, or MAX1109EUB+T equivalent, this page delivers verified electrical specs, µMAX package layout, real-world use scenarios, and two confirmed alternative ADCs for 8-bit dual-channel, single-supply, serial-output designs requiring <150µA supply current and ±0.5LSB INL over –40°C to +85°C.
Technical Context
The MAX1109EUB+T employs a charge-redistribution SAR architecture with integrated track/hold and auto-zero rail, enabling accurate 8-bit conversion without external hold capacitors. Its analog front-end supports eight software-selectable modes-including single-ended unipolar, pseudo-differential bipolar, and VDD monitoring-via a configurable 8-bit control byte shifted in on DIN.
Conversion timing is determined by either the internal 400kHz oscillator or an external clock (50–500kHz); acquisition time is fixed at 1µs at max clock rate. The REF pin accepts internal +4.096V reference or external 1V to VDD references, with 1µF bypassing required for internal reference stability and ±0.5LSB settling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit SAR - delivers 256 discrete output codes with no missing codes over temperature. |
| Supply Voltage | +4.5V to +5.5V - compatible with standard 5V logic and industrial power rails; absolute max rating is +6V. |
| Supply Current | 130µA at 50ksps - enables multi-year battery life in solar- or 4–20mA-powered remote sensors. |
| Internal Reference | +4.096V ±0.5% - provides full-scale range of 0V to +4.096V in unipolar mode; tempco ±50ppm/°C. |
| INL / DNL | ±0.5LSB / ±0.15LSB typical - ensures monotonicity and <0.2% end-point linearity error across full scale. |
| Sampling Rate | Up to 50ksps - supports dynamic signal capture up to 0.8MHz full-power bandwidth (unipolar). |
| Power-Down Current | 0.5µA - reduces system standby power by >250×; wake-up time is 12ms after CS assertion. |
Pinout & Package
MAX1109EUB+T is housed in a 10-pin µMAX package (3mm × 3mm, 0.5mm pitch), footprint 20% of an 8-pin DIP. Pin 1 = VDD; pin 4 = GND; pin 5 = REF; pins 2 & 3 = CH0 & CH1 analog inputs; pin 6 = COM common reference; pins 7–10 = CS, DIN, DOUT, SCLK digital interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply | Must be decoupled with ≥0.1µF ceramic capacitor to GND; powers analog and digital sections. |
| CH0 (Pin 2) | Analog input channel 0 | Sampled input (SI) in selected mode; common-mode range = 0V to VDD; clamped ±0.3V beyond rails. |
| CH1 (Pin 3) | Analog input channel 1 | Second independent analog input; shares same configuration and timing as CH0 via control byte. |
| GND (Pin 4) | Analog/digital ground | Single ground connection; must be low-impedance return path for REF bypass and analog signals. |
| REF (Pin 5) | Reference voltage source/sink | Outputs +4.096V internal ref or accepts 1V–VDD external ref; requires 1µF bypass to GND. |
| COM (Pin 6) | Common-mode reference | Sets zero-code point in single-ended mode; must remain stable to ±0.5LSB during conversion. |
| CS (Pin 7) | Active-low chip select | Enables serial interface; DOUT enters high-Z when CS high; falling edge initiates conversion sequence. |
| DIN (Pin 8) | Serial data input | Accepts 8-bit control byte on rising SCLK edges; logic levels compatible with both 3V and 5V systems. |
| DOUT (Pin 9) | Serial data output | Three-state MSB-first output; valid on falling SCLK edge; high-Z when CS high; max load = 10pF. |
| SCLK (Pin 10) | Serial clock input | Clocks data in/out; in external-clock mode, also controls conversion speed (50–500kHz). |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input modes | Eight selectable configurations (unipolar/bipolar, single-ended/pseudo-differential, VDD monitor) via 8-bit control byte - eliminates external jumpers or hardware rework. |
| Integrated track/hold and reference | No external hold capacitor or precision reference IC needed - reduces BOM count and PCB area in space-constrained portable instruments. |
| SPI/QSPI/MICROWIRE compatibility | Direct interface to microcontrollers without level shifters or glue logic - CPOL=CPHA=0 configuration required for SPI hosts. |
| VDD monitoring capability | Dedicated mode measures supply voltage against internal reference - enables autonomous low-battery detection in remote sensor nodes. |
| Ultra-low power-down state | 0.5µA shutdown current with 12ms wake-up - supports duty-cycled operation in energy-harvesting applications. |
Applications
| Portable Data Logging | Hand-Held Measurement Devices |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and light intensity every 10 seconds. IC Role / Device Role / Timing Role: Dual-channel ADC digitizes two analog sensor outputs per cycle; internal reference ensures consistent scaling across varying battery voltage. Use Value: 130µA active current and 0.5µA shutdown extend CR2032 battery life beyond 3 years in 99% sleep duty cycle. |
Use Scenario: Pocket-sized multimeter measuring DC voltage and current simultaneously using isolated shunt and divider networks. IC Role / Device Role / Timing Role: Configured in pseudo-differential unipolar mode to reject common-mode noise from shared ground paths between channels. Use Value: ±0.5LSB INL and 49dB SINAD enable 0.5% basic accuracy without calibration across –40°C to +85°C. |
| Medical Instruments | Solar-Powered Remote Systems |
|
Use Scenario: Wearable pulse oximeter acquiring red/IR photodiode signals under variable ambient light conditions. IC Role / Device Role / Timing Role: Bipolar mode captures AC-coupled photodiode output centered at VREF/2; COM pin referenced to photodiode bias point. Use Value: 1.5MHz small-signal bandwidth allows undersampling of fast transient pulses while maintaining SNR integrity. |
Use Scenario: Off-grid weather station powered by 6V solar panel and supercapacitor, transmitting data hourly via LoRaWAN. IC Role / Device Role / Timing Role: VDD monitoring mode tracks charging status; CH0/CH1 measure panel voltage and battery SOC via resistive dividers. Use Value: Single 5V supply powers ADC and microcontroller; internal +4.096V reference eliminates need for external voltage reference IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit dual-channel serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.7V–5.25V supply; 1.25mW @ 50ksps (vs. 0.65mW for MAX1109EUB+T); no internal reference; requires external 2.5V ref. | Higher power draw limits battery lifetime; external reference adds cost and layout complexity. | Choose only if existing design already uses TI's reference architecture and requires identical pinout. |
| TLV2548IPW | 2.7V–5.5V supply; 1.5mW @ 200ksps; 12-bit resolution; internal 2.5V ref; SPI-only (no QSPI/MICROWIRE). | Over-spec'd resolution increases data handling overhead; higher power negates low-energy advantage. | Select when 12-bit precision is mandatory and system can accommodate 10× higher active current. |
Compared with ADS7822U and TLV2548IPW, MAX1109EUB+T offers the lowest active power (130µA), integrated +4.096V reference, and broadest serial protocol support - making it optimal for ultra-low-power, space-constrained, dual-channel sensing where 8-bit resolution suffices.
Availability
MAX1109EUB+T is available at Aetrix Electronics and suitable for portable data logging, hand-held measurement devices, and solar-powered remote systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1109EUB+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) is a fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX1108/MAX1109 family was designed for ultra-low-power, dual-channel data acquisition in battery-operated instrumentation - prioritizing sub-150µA active current, software configurability, and minimal external components.
FAQ
What is the operating temperature range for MAX1109EUB+T?
The MAX1109EUB+T is rated for –40°C to +85°C operation, as confirmed by the Ordering Information table listing "MAX1109EUB" with "–40°C to +85°C" temperature grade. This extended range supports deployment in outdoor industrial sensors, automotive cabin modules, and medical field equipment without derating.
Does MAX1109EUB+T require an external reference voltage?
No - MAX1109EUB+T includes an internal +4.096V reference that can be used directly. However, the REF pin also accepts external references from 1V to VDD, providing flexibility for applications needing tighter tolerance or different full-scale ranges. A 1µF capacitor to GND is mandatory when using the internal reference.
Can MAX1109EUB+T interface with a 3.3V microcontroller SPI bus?
Yes - MAX1109EUB+T digital inputs (CS, DIN, SCLK) accept logic levels compatible with both 3V and 5V systems regardless of VDD voltage. Its DOUT output is CMOS-level and drives correctly into 3.3V MCU inputs when VDD = 5V, provided the MCU input tolerates 5V (or uses series resistor/current-limiting).
What is the maximum sampling rate achievable with MAX1109EUB+T?
MAX1109EUB+T supports up to 50ksps (50,000 samples per second), achieved using the internal 400kHz clock or an external 500kHz clock. Conversion time is 20µs in external clock mode and 35µs in internal clock mode, as specified in the Electrical Characteristics tables for MAX1109.
How does the VDD monitoring mode work on MAX1109EUB+T?
In VDD monitoring mode, MAX1109EUB+T uses its internal +4.096V reference to measure the VDD supply voltage relative to full scale. When configured via the control byte, the device returns a digital code proportional to VDD/4.096, enabling firmware-based low-voltage detection without external resistive dividers or dedicated supervisor ICs.
MAX1109EUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 50k
- Number of Inputs:
- 2
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-uMAX/uSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1109EUB+T FAQ
1.How can I place an order for MAX1109EUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1109EUB+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 MAX1109EUB+T reliable?
The price and inventory of MAX1109EUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1109EUB+T is usually 5 days.
3.What payment methods are accepted for MAX1109EUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1109EUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1109EUB+T?
MAX1109EUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1109EUB+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 MAX1109EUB+T?
For technical support, including MAX1109EUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1109EUB+T requirements.
6.How does Aetrix verify that MAX1109EUB+T is sourced from the original manufacturer or authorized distributors?
All MAX1109EUB+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 MAX1109EUB+T meets industry standards.
7.What is the process for return or replacement of MAX1109EUB+T?
All MAX1109EUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1109EUB+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 MAX1109EUB+T part is unused and in its original packaging.
Return procedure for MAX1109EUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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