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Analog Devices Inc./Maxim Integrated MAX1108EUB-TG069
- Part No.:
- MAX1108EUB-TG069
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1108EUB-TG069.pdf
- Description:
- 2-CHANNEL, SERIAL 8-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX1108EUB-TG069 from Maxim Integrated is a low-power, 8-bit, dual-channel successive-approximation analog-to-digital converter (ADC) with integrated track/hold, internal +2.048V reference, and SPI/QSPI/MICROWIRE-compatible 4-wire serial interface. It operates from +2.7V to +3.6V, consumes 105µA at 50ksps, supports software-configurable unipolar/bipolar and single-ended/differential inputs, and includes VDD monitoring mode - ideal for portable data loggers and hand-held medical instruments.
For engineers reviewing the MAX1108EUB-TG069 datasheet, MAX1108EUB-TG069 pinout, MAX1108EUB-TG069 application, or MAX1108EUB-TG069 equivalent, key selection considerations include its 10-pin µMAX package, 50ksps conversion rate with ±0.15LSB INL, 49dB SINAD, and support for external reference input from 1V to VDD - critical for battery-powered precision sensing systems requiring minimal power and board space.
Technical Context
The MAX1108EUB-TG069 employs a charge-redistribution SAR architecture with an integrated track/hold circuit and auto-zero rail referenced to VDD/2. Its conversion process is fully software-controlled via an 8-bit configuration byte that selects input mode (CH0/CH1, COM reference), polarity (unipolar/bipolar), clock source (internal or external), and power-down state.
It features dual analog input channels (CH0, CH1), a common-mode input range of 0V to VDD, and supports pseudo-differential acquisition where only the sampled input (SI) is held while the reference input (RI) must remain stable within ±0.5LSB. Acquisition time is fixed at 1µs at 2MHz SCLK, and aperture jitter is <50ps - enabling accurate sampling of transient signals up to 1.5MHz small-signal bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit SAR with no missing codes over temperature - ensures monotonic output and deterministic digital representation across full operating range. |
| Sampling Rate | Up to 50ksps using internal or external clock - supports real-time monitoring of fast-changing sensor outputs in portable instrumentation. |
| INL / DNL | ±0.15LSB / ±0.5LSB typical - enables high linearity for precise voltage measurement without calibration in most embedded applications. |
| SINAD / SFDR | 49dB / 68dB at 10kHz - sufficient for 7.5 effective bits, suitable for medium-accuracy industrial and medical signal acquisition. |
| Supply Current | 105µA at 3V and 50ksps; 0.5µA in power-down - extends battery life in solar- or 4–20mA-powered remote systems. |
| Reference Voltage | +2.048V internal (±0.8ppm/°C tempco); external range 1V to VDD - allows flexible scaling for 0–2.048V unipolar or ±1.024V bipolar full-scale ranges. |
| Input Bandwidth | 1.5MHz small-signal, 0.8MHz full-power - supports undersampling of RF or transient events while maintaining accuracy. |
Pinout & Package
The MAX1108EUB-TG069 is housed in a 10-pin µMAX package (3mm × 3mm, 0.5mm pitch), occupying only 20% of an 8-pin plastic DIP footprint - optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts +2.7V to +3.6V; powers internal reference, T/H, and logic; PSR ±0.4mV/V ensures stable conversion under supply ripple. |
| CH0 (Pin 2) | Analog input channel 0 | Sampled input (SI) in selected mode; common-mode range 0V to VDD; input capacitance 18pF requires low-impedance drive for <1µs acquisition. |
| CH1 (Pin 3) | Analog input channel 1 | Second independent analog input; shares same configuration and timing as CH0; channel-to-channel offset matching ±0.1LSB. |
| GND (Pin 4) | Analog/digital ground | Single ground pin for all circuits; decoupling required near VDD and REF to minimize noise coupling into T/H node. |
| REF (Pin 5) | Reference voltage terminal | Outputs +2.048V internal reference or accepts external 1V–VDD reference; requires 1µF bypass capacitor to GND for stability. |
| COM (Pin 6) | Common-mode reference | Sets zero-code point in single-ended mode; must remain stable within ±0.5LSB during conversion to avoid error. |
| CS (Pin 7) | Active-low chip select | Enables serial interface; DOUT enters high-impedance state when CS = high - allows multi-device SPI bus sharing. |
| DIN (Pin 8) | Serial data input | Receives 8-bit control byte on rising SCLK edges; configures input mode, clock source, and power state before conversion. |
| DOUT (Pin 9) | Serial data output | Three-state output; delivers 8-bit result MSB-first on falling SCLK edges; compatible with 3V/5V logic regardless of VDD. |
| SCLK (Pin 10) | Serial clock input | Clocks data in/out; in external mode sets conversion speed (50–500kHz); internal mode uses 400kHz oscillator for autonomous operation. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input modes | Single-ended unipolar, pseudo-differential unipolar/bipolar, and VDD monitoring - eliminates external multiplexers and level-shifters in multi-sensor systems. |
| Integrated track/hold and reference | No external hold capacitor or reference IC needed - reduces BOM count and PCB area while ensuring matched timing and drift performance. |
| Ultra-low power consumption | 105µA active, 0.5µA shutdown - enables >1-year battery life in intermittent-sampling applications like environmental sensors. |
| SPI/QSPI/MICROWIRE compatibility | Direct interface to microcontrollers without level-shifting or glue logic - simplifies firmware integration and reduces debug time. |
| Small 10-pin µMAX package | 3mm × 3mm footprint - fits in wearable devices and handheld test equipment where board space is at premium. |
Applications
| Portable Data Logging | Hand-Held Medical Instruments |
|---|---|
Use Scenario: Battery-powered field recorder capturing temperature, humidity, and pressure from multiple sensors at 10–50Hz. IC Role / Device Role / Timing Role: Dual-channel ADC digitizes two analog sensor outputs per cycle; internal 400kHz clock enables autonomous 50ksps sampling without MCU intervention. Use Value: 105µA supply current and software power-down extend AA battery life to >2 years; 1.5MHz input bandwidth supports anti-alias filtering for clean DC-coupled measurements. | Use Scenario: Portable blood glucose meter with electrochemical sensor and LCD display powered by coin-cell battery. IC Role / Device Role / Timing Role: Converts analog current from biosensor to 8-bit digital value; VDD monitoring mode verifies battery health before each reading. Use Value: ±0.15LSB INL ensures consistent calibration across batches; unipolar/bipolar configurability accommodates both amperometric and potentiometric sensor interfaces. |
| Solar-Powered Remote Systems | 4–20mA-Powered Remote Systems |
Use Scenario: Wireless soil moisture and solar irradiance monitor deployed in off-grid agricultural sites with intermittent sunlight. IC Role / Device Role / Timing Role: ADC samples photodiode and resistive sensor outputs; power-down mode activated between transmissions to conserve energy harvested by small PV panel. Use Value: 0.5µA shutdown current minimizes dark-current drain; 1µF REF bypass ensures stable reference despite variable solar input voltage. | Use Scenario: Loop-powered industrial transmitter converting thermocouple or RTD signals to 4–20mA output using microcontroller and DAC. IC Role / Device Role / Timing Role: Provides isolated analog front-end digitization; internal +2.048V reference eliminates need for precision external reference in tight loop-power budget. Use Value: 10-pin µMAX package fits inside compact DIN-rail housing; 50ksps rate supports fast response to process transients without oversampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit dual-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 200ksps, +2.7V to +5.25V supply, internal 2.5V reference, SPI interface, SO-8 package | Higher speed but larger SO-8 footprint; no software-configurable bipolar mode; lacks VDD monitoring | Choose for higher throughput where board space permits and bipolar input not required. |
| MAX1110EUB+ | 8-bit, 50ksps, +2.7V to +3.6V, internal 2.048V reference, SPI, same 10-pin µMAX package | Pin-compatible upgrade with improved INL (±0.1LSB), lower power (95µA), and enhanced ESD protection | Prefer for new designs requiring tighter linearity or longer battery life; drop-in replacement for MAX1108EUB-TG069. |
Compared with ADS7822U and MAX1110EUB+, the MAX1108EUB-TG069 offers unique VDD monitoring and software-selectable bipolar operation in the smallest footprint, while MAX1110EUB+ provides superior linearity and efficiency for cost-insensitive upgrades.
Availability
The MAX1108EUB-TG069 is available at Aetrix Electronics and suitable for portable data logging, hand-held medical instruments, and solar-powered remote systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1108EUB-TG069 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX1108 series belongs to Maxim's precision low-power ADC product line, designed specifically for battery-operated instrumentation where size, power, and configurability outweigh raw resolution requirements.
FAQ
What is the operating temperature range of the MAX1108EUB-TG069?
The MAX1108EUB-TG069 is specified for operation from –40°C to +85°C. This extended industrial temperature range ensures reliable performance in outdoor environmental sensors, automotive diagnostics tools, and industrial handheld testers exposed to wide ambient conditions. The device maintains ±0.15LSB INL and 49dB SINAD across this full range, as verified in the MAX1108 electrical characteristics tables.
Does the MAX1108EUB-TG069 support bipolar input configurations?
Yes, the MAX1108EUB-TG069 supports bipolar operation via software configuration. When configured for bipolar mode, the full-scale range becomes ±VREF/2 (±1.024V with internal reference), and output data is delivered in two's-complement format. This is enabled by setting SEL2–SEL0 bits in the control byte to select pseudo-differential input with COM as reference - allowing measurement of AC-coupled or centered DC signals without external level-shifting circuitry.
How does the power-down mode function in the MAX1108EUB-TG069?
The MAX1108EUB-TG069 enters power-down mode by writing '0' to bit 5 (SHDN) of the configuration register. After completing the current conversion, supply current drops to 0.5µA. Wake-up time is 12ms, after which the device resumes normal operation. This mode is essential for duty-cycled applications like wireless sensor nodes, where the MAX1108EUB-TG069 remains idle >99% of the time yet must retain full functionality upon wake-up.
Can the MAX1108EUB-TG069 use an external reference voltage?
Yes, the MAX1108EUB-TG069 accepts an external reference voltage applied to the REF pin, ranging from 1V to VDD. When using an external reference, the internal +2.048V reference is disabled. This allows scaling the full-scale range to match specific sensor output spans (e.g., 0–3.3V or 0–5V systems) while retaining the same 8-bit resolution and linearity performance - provided the external reference meets stability and noise requirements outlined in the datasheet.
What is the maximum source impedance supported for analog inputs on the MAX1108EUB-TG069?
The MAX1108EUB-TG069 specifies a minimum acquisition time of 1µs at 2MHz SCLK, determined by tACQ = 6(RS + RIN) × 18pF, where RIN = 6.5kΩ. For accurate conversions at full speed, source impedance (RS) should be ≤2.7kΩ. If RS exceeds 3kΩ, the SCLK frequency must be reduced to maintain ≥1µs acquisition time - for example, RS = 10kΩ requires SCLK ≤1.1MHz to preserve 50ksps throughput and ±0.5LSB DNL.
MAX1108EUB-TG069 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 50k
- Number of Inputs:
- 1, 2
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- 4-Wire Serial, Microwire, QSPI, 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:
- Internal Oscillator
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-uMAX
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1108EUB-TG069 FAQ
1.How can I place an order for MAX1108EUB-TG069 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1108EUB-TG069 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 MAX1108EUB-TG069 reliable?
The price and inventory of MAX1108EUB-TG069 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1108EUB-TG069 is usually 5 days.
3.What payment methods are accepted for MAX1108EUB-TG069?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1108EUB-TG069 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1108EUB-TG069?
MAX1108EUB-TG069 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1108EUB-TG069 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 MAX1108EUB-TG069?
For technical support, including MAX1108EUB-TG069 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1108EUB-TG069 requirements.
6.How does Aetrix verify that MAX1108EUB-TG069 is sourced from the original manufacturer or authorized distributors?
All MAX1108EUB-TG069 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 MAX1108EUB-TG069 meets industry standards.
7.What is the process for return or replacement of MAX1108EUB-TG069?
All MAX1108EUB-TG069 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1108EUB-TG069, 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 MAX1108EUB-TG069 part is unused and in its original packaging.
Return procedure for MAX1108EUB-TG069:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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