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Analog Devices Inc./Maxim Integrated MAX11603EEE+
- Part No.:
- MAX11603EEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX11603EEE+.pdf
- Description:
- IC ADC 8BIT SAR 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,115
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Product details
Overview
MAX11603EEE+ from Maxim Integrated is an 8-bit, 8-channel, low-power analog-to-digital converter with integrated track/hold, 2.048V internal reference, I²C-compatible 2-wire serial interface, and operation from a single 2.7V–3.6V supply. It delivers 188ksps throughput with 350µA supply current and supports software-configurable unipolar/bipolar and single-ended/pseudo-differential input modes for precision sensor digitization in space-constrained battery-powered systems.
For engineers reviewing the MAX11603EEE+ datasheet, MAX11603EEE+ pinout, MAX11603EEE+ application, or MAX11603EEE+ equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative options - all aligned to the official MAX11603EEE+ specification sheet (Rev 2, March 2010) and Maxim's product documentation.
Technical Context
The MAX11603EEE+ employs successive-approximation architecture with on-chip track/hold and internal 2.048V reference, enabling accurate 8-bit conversion without external support components. Its 2-wire I²C interface operates at up to 1.7MHz (high-speed mode) and supports both internal and external clocking, with configurable channel-scan FIFO for automated multi-channel acquisition.
Input multiplexing allows eight single-ended or four pseudo-differential channels, with software-selectable unipolar/bipolar operation and full-scale range determined by internal or external reference (1V to VDD). Acquisition time is 588ns, and analog input bandwidth is 2.0MHz (small-signal), supporting transient capture and undersampling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital output levels for moderate-precision sensing and monitoring tasks. |
| Sampling Rate | 188ksps - enables real-time sampling of signals up to ~94kHz (Nyquist-limited), suitable for audio-band and fast transients. |
| Supply Voltage | 2.7V to 3.6V - compatible with standard Li-ion/Li-poly and 3.3V logic rails, eliminating need for level-shifting or LDOs. |
| Internal Reference | 2.048V ±120ppm/°C - provides stable, factory-trimmed scaling for consistent ADC full-scale without external voltage reference IC. |
| Total Unadjusted Error | ±1 LSB - guarantees monotonicity and ≤0.4% full-scale error across -40°C to +85°C, critical for calibrated measurement systems. |
| I²C Interface Speed | Up to 1.7MHz (high-speed mode) - reduces data transfer time per sample to <10µs, easing host MCU timing constraints. |
| Power Consumption | 350µA at 188ksps; 1µA in AutoShutdown™ - extends battery life in portable instruments and remote sensors. |
Pinout & Package
MAX11603EEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.635mm pitch), optimized for high-density PCB layouts and reflow compatibility. Pin assignments are validated per Maxim's official pin configuration diagram (page 8, Rev 2 datasheet).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AIN11/REF | Configurable terminal: analog input channel 11 or reference input/output - selected via SEL[2:1] bits in setup register. |
| 2–9 | AIN0–AIN7 | Eight dedicated single-ended analog inputs; also serve as positive/negative pairs in pseudo-differential mode (e.g., AIN0+/AIN1−). |
| 10 | SCL | I²C serial clock input - controls timing of data reads/writes; supports fast (400kHz) and high-speed (1.7MHz) modes. |
| 11 | SDA | I²C bidirectional data line - carries configuration bytes, conversion results, and acknowledge bits; requires external pull-up. |
| 12 | GND | Analog/digital ground reference - must be low-impedance and separated from noisy digital returns to preserve SNR. |
| 13 | VDD | Positive supply input - bypassed with 0.1µF ceramic capacitor to GND to suppress switching noise affecting reference and T/H stability. |
| 14–16 | N.C. | No-connect pins - left unconnected per datasheet; no internal bonding or function. |
Key Features
| Feature | Design Value |
|---|---|
| AutoShutdown™ | Reduces supply current to <1µA between conversions - eliminates need for external power-gating circuitry in low-duty-cycle monitoring. |
| Software-Configurable Input Modes | Single-ended (8 ch) or pseudo-differential (4 ch), unipolar/bipolar - enables flexible signal routing without hardware changes. |
| Integrated Track/Hold & Reference | Eliminates external T/H amplifier and reference IC - reduces BOM count, board area, and calibration complexity. |
| Internal FIFO with Channel-Scan Mode | Automatically sequences through selected channels - simplifies firmware for multi-sensor polling without host intervention. |
| High Analog Input Bandwidth | 2.0MHz small-signal bandwidth - supports accurate digitization of fast pulses and enables undersampling of RF/IF signals. |
Applications
| Handheld Medical Sensors | Battery-Powered Environmental Monitors |
|---|---|
Use Scenario: Portable blood oxygen (SpO₂) or ECG front-end digitizing analog outputs from photodiode and instrumentation amplifiers. IC Role / Device Role / Timing Role: Primary 8-bit ADC capturing multi-channel physiological waveforms at 10–100Hz with ultra-low quiescent current. Use Value: 350µA active current and 1µA shutdown enable >1-week battery life on coin-cell power while maintaining clinical-grade linearity (±1 LSB TUE). |
Use Scenario: Solar-powered soil moisture and temperature node logging data every 5 minutes using resistive/capacitive sensors. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during measurement bursts, interfacing directly to microcontroller over I²C. Use Value: Internal 2.048V reference ensures stable scaling across temperature (-40°C to +85°C), eliminating drift-induced calibration errors in field deployments. |
| Solar-Powered Remote Telemetry | Industrial System Supervision |
Use Scenario: Off-grid weather station measuring wind speed (anemometer), solar irradiance (photodiode), and humidity (capacitive sensor). IC Role / Device Role / Timing Role: Multi-channel ADC with channel-scan FIFO automating sequential acquisition without CPU overhead. Use Value: 8 single-ended inputs reduce external multiplexer requirements, cutting component count and failure points in harsh outdoor enclosures. |
Use Scenario: Embedded controller monitoring rail voltages, fan tachometers, and thermal diodes in network switches or PLCs. IC Role / Device Role / Timing Role: Supervisory ADC providing real-time analog health metrics to host MCU via interrupt-driven I²C reads. Use Value: 1.7MHz I²C speed enables sub-10µs read times per channel, allowing rapid response to overvoltage/overtemperature events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 200ksps, SPI interface, 2.7–5.25V supply, no internal reference - requires external 2.048V ref and level-shifting for 3.3V hosts. | Requires additional ref IC and SPI-capable MCU; better suited for designs already using SPI peripherals and needing marginally higher speed. | Select if SPI is preferred over I²C and external reference is acceptable; avoid if minimizing BOM or using I²C-only microcontrollers. |
| MAX11602EEE+ | Pin-compatible 8-channel variant with 4.096V internal reference and 4.5–5.5V supply range - identical package, timing, and register map. | Designed for 5V systems; not interoperable with 3.3V supply rails without level translation; reference mismatch affects full-scale scaling. | Choose only for 5V applications requiring 4.096V reference; MAX11603EEE+ is not substitutable in MAX11602EEE+ designs due to supply voltage incompatibility. |
Compared with ADS7822U, MAX11603EEE+ saves two components (ref IC + level shifter) and simplifies layout, while MAX11602EEE+ offers identical functionality but mandates 5V operation - making MAX11603EEE+ the optimal choice for compact, 3.3V, I²C-based sensor nodes.
Availability
MAX11603EEE+ is available at Aetrix Electronics and suitable for handheld medical sensors, battery-powered environmental monitors, solar-powered remote telemetry, and industrial system supervision requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX11603EEE+ 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 precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX11600–MAX11605 family was designed for ultra-low-power, multichannel data acquisition in size- and energy-constrained portable and remote systems - emphasizing integration, supply flexibility, and ease of I²C-based firmware implementation.
FAQ
What supply voltage range does the MAX11603EEE+ support?
The MAX11603EEE+ operates from a single 2.7V to 3.6V supply, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This range aligns with common 3.3V logic and Li-ion battery discharge profiles. Operation outside this window is not guaranteed, and exceeding 3.6V risks damage per the absolute maximum rating of +6V on VDD.
Does the MAX11603EEE+ include an internal voltage reference?
Yes, the MAX11603EEE+ integrates a factory-trimmed 2.048V internal reference with ±120ppm/°C temperature coefficient. This reference can be used directly or overridden by an external 1V–VDD source. The internal reference eliminates the need for external reference ICs in most precision sensing applications.
How many analog input channels does the MAX11603EEE+ provide?
The MAX11603EEE+ provides eight analog input channels (AIN0–AIN7), configurable as eight single-ended inputs or four pseudo-differential pairs. This matches the ordering information table confirming "INPUT CHANNELS: 8" for MAX11603EEE+, distinct from the 4- or 12-channel variants in the same family.
What is the maximum I²C clock frequency supported by the MAX11603EEE+?
The MAX11603EEE+ supports I²C Fast Mode (400kHz) and High-Speed Mode (1.7MHz), as confirmed in the Features section and Timing Characteristics tables. At 1.7MHz, it achieves sub-10µs read times per conversion result, reducing host MCU overhead in high-throughput sensor systems.
Is the MAX11603EEE+ pin-compatible with other devices in the MAX11600–MAX11605 family?
The MAX11603EEE+ shares the 16-pin QSOP package and identical pinout with MAX11602EEE+, MAX11604EEE+, and MAX11605EEE+, but differs electrically from MAX11600/MAX11601 (8-pin SOT23). While pinout is identical within the 16-pin group, supply voltage (2.7–3.6V vs. 4.5–5.5V) and internal reference (2.048V vs. 4.096V) prevent direct substitution without design review.
MAX11603EEE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 188k
- Number of Inputs:
- 4, 8
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- I2C
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11603EEE+ FAQ
1.How can I place an order for MAX11603EEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11603EEE+ 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 MAX11603EEE+ reliable?
The price and inventory of MAX11603EEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11603EEE+ is usually 5 days.
3.What payment methods are accepted for MAX11603EEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11603EEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11603EEE+?
MAX11603EEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11603EEE+ 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 MAX11603EEE+?
For technical support, including MAX11603EEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11603EEE+ requirements.
6.How does Aetrix verify that MAX11603EEE+ is sourced from the original manufacturer or authorized distributors?
All MAX11603EEE+ 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 MAX11603EEE+ meets industry standards.
7.What is the process for return or replacement of MAX11603EEE+?
All MAX11603EEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11603EEE+, 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 MAX11603EEE+ part is unused and in its original packaging.
Return procedure for MAX11603EEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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