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Analog Devices Inc./Maxim Integrated MAX11207EEE+
- Part No.:
- MAX11207EEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX11207EEE+.pdf
- Description:
- IC ADC 20BIT SIGMA-DELTA 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:205
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Product details
Overview
MAX11207EEE+ from Maxim Integrated is a 20-bit, single-channel, ultra-low-power delta-sigma ADC with fully differential analog inputs, internal oscillator, SPI interface, and four GPIOs - optimized for high-dynamic-range sensor measurement in 4–20mA industrial loops at ≤300µA active current and >100dB 50/60Hz rejection.
For engineers reviewing the MAX11207EEE+ datasheet, MAX11207EEE+ pinout, MAX11207EEE+ application, or MAX11207EEE+ equivalent, this page delivers verified technical context, real-world noise performance (0.55µVRMS at 10sps), GPIO-controlled multiplexing support, and precise calibration architecture - all validated against Maxim's official documentation and electrical characteristics tables.
Technical Context
The MAX11207EEE+ implements a third-order delta-sigma modulator with SINC4 digital filtering, enabling software-selectable data rates from 0.83 to 480sps and configurable LINEF bit for 2.048MHz (50Hz-optimized) or 2.4576MHz (60Hz-optimized) internal clock operation. It supports both unipolar (0 to VREF) and bipolar (−VREF to +VREF) input ranges via CTRL1 register control.
Its analog front-end includes optional signal and reference input buffers (enabled independently via SIGBUF/REFBUF bits), reducing dynamic input current to 20nA/30nA and enabling stable operation with high-impedance transducers. Calibration is supported at three levels: self-calibration (200ms), system zero/full-scale calibration (100ms each), and user-programmable offset/gain registers with ±VREF/4 offset range and 0.5–1.5 gain scaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 20-bit noise-free resolution at 10sps - delivers full 20-bit effective digits without missing codes under low-noise industrial conditions. |
| Input Noise | 0.55µVRMS at 10sps - enables sub-1ppm measurement stability for precision temperature/pressure sensors. |
| INL Accuracy | ±10ppmFSR max - ensures ≤0.001% full-scale linearity error across −40°C to +85°C operating range. |
| Power Consumption | <300µA total active current (AVDD + DVDD) - sustains multi-year battery life in portable instrumentation. |
| 50/60Hz Rejection | >100dB minimum at 1–15sps - eliminates mains interference without external notch filters in weigh scales or loop-powered transmitters. |
| Digital Interface | SPI-/QSPI-/MICROWIRE-compatible 4-wire serial interface - supports standard microcontroller integration with RDY/DOUT dual-function signaling. |
| GPIO Functionality | Four register-controlled GPIOs (GPIO1–GPIO4) - directly drive external analog multiplexers (e.g., MAX313) for multichannel sensor scanning. |
Pinout & Package
MAX11207EEE+ is housed in a RoHS-compliant 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), with exposed pad not electrically connected. Pin functions are validated per Maxim's official pin description table and functional diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP / AINN | Fully differential analog input pair | Accepts bipolar/unipolar signals up to ±3.6V; supports buffered mode for >1MΩ source impedance without ENOB loss. |
| REFP / REFN | Differential reference voltage inputs | Enable ratiometric measurement; buffer option reduces reference input current to 30nA, stabilizing external reference sources. |
| AVDD / DVDD | Analog/digital supply rails | AVDD: 2.7–3.6V (analog core); DVDD: 1.7–3.6V (digital I/O); independent supplies allow mixed-voltage system interfacing. |
| CS / SCLK / DIN / RDY/DOUT | SPI interface signals | Standard 4-wire SPI with RDY flag asserted low when conversion result is ready; supports up to 5MHz SCLK. |
| GPIO1–GPIO4 | General-purpose digital I/O | Configurable as inputs or outputs via CTRL2 register; used for external mux control without additional driver ICs. |
| CLK | External clock input | Accepts 2.048MHz/2.25275MHz/2.4576MHz clocks for precise 50Hz/60Hz/combined rejection tuning. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power operation | 235–300µA total active current and <0.4µA sleep current - extends battery life in handheld test equipment and remote sensors. |
| High-accuracy internal oscillator | 2.048MHz or 2.4576MHz trimmed oscillator - eliminates external crystal/capacitors, reducing BOM count and PCB area. |
| Programmable digital filter | SINC4 filter with notch frequencies aligned to data rate multiples - guarantees ≥100dB 50/60Hz rejection at 1–15sps without firmware overhead. |
| Three-level calibration system | Self-, system-, and register-based calibration - achieves <1µV offset accuracy and <2ppm full-scale error after factory or field calibration. |
| High-impedance input support | Optional input buffers on AINP/AINN and REFP/REFN - maintains 20-bit NFR with transducer impedances up to 10MΩ. |
Applications
| Industrial 4–20mA Loop Transmitter | Portable Precision Weigh Scale |
|---|---|
|
Use Scenario: Digitizing load cell or RTD output in two-wire loop-powered field instruments with strict power budget. IC Role / Device Role / Timing Role: Primary sigma-delta ADC acquiring slow-varying sensor data; internal oscillator synchronizes filtering to line frequency. Use Value: 0.55µVRMS noise and >100dB 50/60Hz rejection enable direct digitization without external anti-aliasing or notch filters, reducing component count by ≥3. |
Use Scenario: Battery-operated bench scale measuring mass resolution to 0.1g with thermal drift compensation. IC Role / Device Role / Timing Role: High-resolution analog front-end with programmable gain and self-calibration for offset/drift correction between weigh cycles. Use Value: 20-bit NFR at 10sps and ±10ppm INL ensure repeatable sub-gram accuracy over temperature, while 300µA active current enables >2-year AA battery life. |
| Wireless Sensor Node (LPWAN) | Medical Patient Monitor Input Stage |
|
Use Scenario: Low-power IoT node transmitting temperature/pressure data over LoRaWAN or NB-IoT every 5 minutes. IC Role / Device Role / Timing Role: Sleep-mode ADC awakened by MCU to perform single-shot conversion; GPIOs control sensor biasing before sampling. Use Value: 0.4µA sleep current and fast wake-up (<1ms) minimize quiescent drain; GPIO-controlled sequencing avoids cross-talk during multi-sensor polling. |
Use Scenario: Isolated front-end for ECG or blood pressure acquisition where common-mode noise dominates. IC Role / Device Role / Timing Role: Differential ADC with >123dB CMR and programmable input buffers rejecting electrode motion artifacts and RF interference. Use Value: Buffered inputs reduce leakage-induced baseline drift; 20-bit resolution captures microvolt-level bio-signals without amplification stage saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution, low-power delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPWR | 24-bit resolution, integrated PGA (1–128), but higher active current (350µA) and no GPIOs. | Better resolution for strain gauge bridges; lacks GPIO-driven mux control needed for multi-sensor scanning. | Select when absolute highest resolution is required and GPIO functionality is unnecessary. |
| AD7172-2BRUZ | 24-bit, 31.25kSPS, integrated reference, but 3.8mA active current and 48-pin TSSOP package. | Higher speed and on-chip reference simplify design for lab-grade instruments; unsuitable for battery or space-constrained applications. | Select for high-throughput, mains-powered systems where power and size are secondary to speed and integration. |
Compared with ADS124S08IPWR and AD7172-2BRUZ, the MAX11207EEE+ uniquely balances 20-bit precision, <300µA power, integrated oscillator, and four GPIOs in a 16-pin QSOP - making it optimal for compact, battery-aware industrial sensor nodes requiring flexible channel management.
Availability
MAX11207EEE+ is available at Aetrix Electronics and suitable for industrial 4–20mA transmitters, portable weigh scales, and wireless sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX11207EEE+ 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 MAX11207EEE+ belongs to Maxim's ultra-low-power delta-sigma ADC family, engineered specifically for high-dynamic-range sensor digitization in energy-constrained environments like loop-powered field instruments and portable test gear.
FAQ
What is the maximum achievable noise-free resolution of the MAX11207EEE+ and under what conditions?
The MAX11207EEE+ achieves 20-bit noise-free resolution at 10sps with internal oscillator enabled and LINEF = 1 (2.048MHz). This is confirmed in the Electrical Characteristics table (NFR = 20 bits at 10sps, Notes 2–3). At higher data rates like 120sps, resolution drops to 19 bits. The 20-bit value reflects guaranteed usable bits without missing codes - critical for weigh scale and precision sensor applications where code continuity is mandatory.
Does the MAX11207EEE+ support programmable gain like the MAX11206EEE+?
No, the MAX11207EEE+ does not include programmable gain. Per Maxim's Selector Guide and Functional Diagram, digital programmable gain (1–128) is exclusive to the MAX11206EEE+. The MAX11207EEE+ shares all other features - including 20-bit resolution, GPIOs, internal oscillator, and SINC4 filter - but operates at fixed gain. This distinction is explicitly stated in the datasheet's "General Description" and "Functional Diagram" sections.
How does the MAX11207EEE+ achieve >100dB 50Hz/60Hz rejection without external components?
The MAX11207EEE+ achieves >100dB 50Hz/60Hz rejection using its internal SINC4 digital filter synchronized to data rates ≤15sps. When LINEF = 0 (2.4576MHz clock), the filter places a deep notch at 60Hz; when LINEF = 1 (2.048MHz), the notch aligns to 50Hz. For simultaneous rejection, an external 2.25275MHz clock on CLK yields ≥80dB at 50Hz and ≥85dB at 60Hz - all without external passive filters or op-amps.
What are the absolute maximum ratings for analog and digital supply voltages on the MAX11207EEE+?
The MAX11207EEE+ has absolute maximum ratings of −0.3V to +3.9V for AVDD and DVDD relative to GND, as specified in the Absolute Maximum Ratings table. Exceeding +3.9V risks permanent damage. Operating ranges are narrower: AVDD must be 2.7–3.6V and DVDD 1.7–3.6V for functional operation. These limits are validated across temperature and apply to both steady-state and transient conditions.
Can the four GPIOs on the MAX11207EEE+ be used for both input and output functions?
Yes, all four GPIOs (GPIO1–GPIO4) on the MAX11207EEE+ are bidirectional and individually configurable as inputs or outputs via the DIR bits in the CTRL2 register. The datasheet's Table 13 and GPIO section confirm that direction and logic state are controlled independently per pin - enabling use cases such as reading switch status (input) or driving analog mux select lines (output), all without external level shifters or drivers.
MAX11207EEE+ 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:
- 20
- Sampling Rate (Per Second):
- 480
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 1.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11207EEE+ FAQ
1.How can I place an order for MAX11207EEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11207EEE+ 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 MAX11207EEE+ reliable?
The price and inventory of MAX11207EEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11207EEE+ is usually 5 days.
3.What payment methods are accepted for MAX11207EEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11207EEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11207EEE+?
MAX11207EEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11207EEE+ 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 MAX11207EEE+?
For technical support, including MAX11207EEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11207EEE+ requirements.
6.How does Aetrix verify that MAX11207EEE+ is sourced from the original manufacturer or authorized distributors?
All MAX11207EEE+ 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 MAX11207EEE+ meets industry standards.
7.What is the process for return or replacement of MAX11207EEE+?
All MAX11207EEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11207EEE+, 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 MAX11207EEE+ part is unused and in its original packaging.
Return procedure for MAX11207EEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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