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Analog Devices Inc./Maxim Integrated MAX1415AEWE+
- Part No.:
- MAX1415AEWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX1415AEWE+.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,392
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Product details
Overview
The MAX1415AEWE+ from Maxim Integrated is a 16-bit, low-power, 2-channel sigma-delta analog-to-digital converter (ADC) with integrated PGA (gain 1–128), on-chip input buffer, and internal oscillator (1MHz or 2.4576MHz). It delivers no missing codes, ±0.0015% INL (max), and >98dB 50Hz/60Hz rejection - optimized for precision industrial sensing in weigh scales, strain-gauge systems, and loop-powered transmitters.
For engineers reviewing the MAX1415AEWE+ datasheet, MAX1415AEWE+ pinout, MAX1415AEWE+ application, or MAX1415AEWE+ equivalent, this device supports SPI/QSPI/MICROWIRE serial interface, operates from 2.7V to 3.6V, features on-demand offset/gain self-calibration, and targets high-accuracy DC measurement applications requiring stable reference rejection and low power (<1.2mW typical).
Technical Context
The MAX1415AEWE+ implements a second-order sigma-delta modulator with digital filter, achieving 16-bit resolution without missing codes across two fully differential analog inputs (AIN1±, AIN2±). Its architecture includes programmable gain amplifier (PGA), optional input buffering, and dual-clock operation (internal or external CLKIN up to 2.4576MHz).
It supports unipolar/bipolar input ranges referenced to an external differential reference (REF±), provides user-programmable offset/gain registers, and enables system-level calibration via dedicated DRDY, CS, DIN, DOUT, and RESET signals - all synchronized to the selected clock source and data rate configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage for precision DC measurements. |
| INL (max) | ±0.0015% FSR at gain = 1, bipolar/unbuffered - ensures sub-1-LSB linearity error over full scale. |
| Power consumption | 1.2mW max at 3V - enables battery or loop-powered operation without thermal derating. |
| 50/60Hz rejection | >98dB normal-mode - eliminates mains interference in industrial environments without external notch filters. |
| Supply range | 2.7V to 3.6V - compatible with single-cell Li-ion, 3.3V logic rails, and isolated supply domains. |
| PGA gain | 1 to 128 programmable - allows direct interfacing with µV-level sensor outputs (e.g., load cells, RTDs). |
| Operating temp | –40°C to +85°C - qualified for industrial-grade embedded instrumentation and field-deployed sensors. |
Pinout & Package
MAX1415AEWE+ is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch), thermally enhanced for stable operation in compact industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCLK | Serial clock input | Synchronizes all serial data transfers; supports up to 2.4576MHz external clock or internal oscillator output. |
| 2 DIN | Serial data input | Accepts command and configuration bits (e.g., gain, channel select, calibration mode) during CS low. |
| 3 DOUT | Serial data output | Tri-state output delivering conversion results and status flags; driven only when CS is low and SCLK active. |
| 4 CS | Chip select | Active-low enable for serial interface; initiates frame sync and controls DOUT output state. |
| 5 RESET | Hardware reset | Asynchronous active-low signal that clears internal registers and forces default configuration on rising edge. |
| 6 DRDY | Data ready indicator | Open-drain output pulses low when conversion result is valid and ready for readout. |
| 7 CLKIN | External clock input | Accepts 400kHz–2.5MHz square wave; disables internal oscillator when driven externally. |
| 8 CLKOUT | Internal clock output | Provides buffered internal oscillator output (1MHz or 2.4576MHz) for system clock distribution. |
| 9 VDD | Positive supply | 2.7V–3.6V analog/digital supply; decoupling required at pin for noise-sensitive sigma-delta operation. |
| 10 GND | Analog/digital ground | Single ground plane recommended; separates reference and digital return paths internally. |
| 11 REF+ | Differential reference positive | Accepts 1.00V–1.75V external reference voltage; sets full-scale input range with PGA gain scaling. |
| 12 REF- | Differential reference negative | Reference return node; must be tied to clean ground or bias point matching REF+ common-mode. |
| 13 AIN1+ | Channel 1 differential input (+) | High-impedance input for first fully differential sensor pair; supports buffered/unbuffered modes. |
| 14 AIN1- | Channel 1 differential input (–) | Paired with AIN1+; common-mode range shifts with PGA gain and buffer selection (GND+50mV to VDD−1.5V). |
| 15 AIN2+ | Channel 2 differential input (+) | Second independent differential input; identical electrical specs and routing rules as AIN1±. |
| 16 AIN2- | Channel 2 differential input (–) | Paired with AIN2+; shares same PGA, filter, and calibration resources as AIN1± path. |
Key Features
| Feature | Design Value |
|---|---|
| On-demand self-calibration | Offset and gain calibration initiated via serial command - eliminates drift-induced errors without external hardware. |
| Programmable input buffering | Buffer enabled/disabled per channel - trades input impedance (>1GΩ unbuffered) for common-mode rejection (130dB at high gain). |
| Dual internal clock options | Selectable 1MHz or 2.4576MHz oscillator - matches standard UART baud rates and simplifies timing in isolated systems. |
| Flexible reference interface | Supports 1.00V–1.75V differential reference - enables use of precision bandgap or ratiometric sensor references. |
| Low-power shutdown mode | 2µA typical power-down current - preserves system energy budget during idle intervals in portable instrumentation. |
| SPI/QSPI/MICROWIRE compatibility | Standard 4-wire serial protocol with CS, SCLK, DIN, DOUT - integrates seamlessly with ARM Cortex-M, PIC, and FPGA controllers. |
Applications
| Weigh Scales | Strain-Gauge Measurements |
|---|---|
Use Scenario: High-resolution weight measurement in platform scales and hopper load cells using mV/V bridge outputs. IC Role / Device Role / Timing Role: Precision ADC digitizing low-level differential signals with PGA gain up to 128 and 50/60Hz notch filtering. Use Value: Delivers 16-bit noise-free resolution at 60Hz ODR with <0.7µV RMS noise (gain=128, buffered), enabling 1:100,000 dynamic range. |
Use Scenario: Monitoring mechanical stress in structural health monitoring systems with quarter/half/full Wheatstone bridges. IC Role / Device Role / Timing Role: Dual-channel sigma-delta converter acquiring synchronized strain readings while rejecting thermal EMF and EMI. Use Value: ±0.0015% INL and on-chip offset calibration ensure traceable accuracy over –40°C to +85°C without recalibration. |
| Loop-Powered Systems | Pressure Transducers |
Use Scenario: 4–20mA transmitter front-end where power budget is limited to <4mA at 24V. IC Role / Device Role / Timing Role: Low-power ADC converting sensor output while consuming only 1.2mW - leaving >15mW for signal conditioning and DAC. Use Value: 2.7V–3.6V operation and 2µA shutdown current allow continuous monitoring with ultra-low quiescent draw. |
Use Scenario: Industrial pressure sensing in HVAC, process control, and hydraulic systems using piezoresistive elements. IC Role / Device Role / Timing Role: High CMR (130dB at gain=128) and programmable PGA reject common-mode noise from long cable runs. Use Value: >98dB 50/60Hz rejection eliminates need for external analog filters, reducing BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7705BRUZ | 16-bit, 2-channel sigma-delta ADC; no internal oscillator; requires external clock; 2.7V–5.25V supply; 0.003% INL (max). | Lacks integrated clock and lower INL spec; suited for designs already using external crystal or where tighter layout control over clock routing is preferred. | Select AD7705BRUZ when migrating legacy AD7705-based designs or when external clock synchronization is mandatory. |
| ADS1220IPWR | 24-bit, 2-channel delta-sigma ADC; integrated PGA (1–128), VREF, and temperature sensor; 2.5V–5.5V supply; 0.0015% INL (max); SPI interface. | Higher resolution and on-chip reference simplify design but increase power (~1.1mW vs. 1.2mW) and cost; not pin-compatible. | Choose ADS1220IPWR for next-generation upgrades requiring extended resolution or integrated diagnostics, accepting non-drop-in replacement. |
Compared with AD7705BRUZ, MAX1415AEWE+ offers integrated clocking and superior INL; versus ADS1220IPWR, it provides lower power and smaller footprint at 16-bit resolution - making it optimal for space-constrained, battery-aware industrial nodes.
Availability
MAX1415AEWE+ is available at Aetrix Electronics and suitable for industrial instruments, weigh scales, and strain-gauge measurement systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MAX1415AEWE+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets.
The MAX1415AEWE+ belongs to Maxim's precision sigma-delta ADC product line, engineered specifically for low-power, high-accuracy DC measurement in harsh industrial environments with strong noise immunity.
FAQ
What is the operating voltage range for the MAX1415AEWE+?
The MAX1415AEWE+ operates from 2.7V to 3.6V on its VDD pin. This single-supply range supports compatibility with 3.3V logic systems and battery-powered instrumentation. Operation outside this range may cause functional failure or permanent damage, as specified in the absolute maximum ratings.
Does the MAX1415AEWE+ support both buffered and unbuffered analog input modes?
Yes, the MAX1415AEWE+ supports both buffered and unbuffered analog input configurations. Buffering improves common-mode rejection (up to 130dB at gain=128) but reduces input voltage range (GND+50mV to VDD−1.5V); unbuffered mode offers wider common-mode range (GND−30mV to VDD+30mV) with lower CMR.
How does the internal oscillator of the MAX1415AEWE+ function, and can it be disabled?
The MAX1415AEWE+ includes an internal oscillator configurable for 1MHz or 2.4576MHz output via the CLK pin. It is automatically disabled when an external clock is applied to CLKIN, allowing flexible timing control. The CLKOUT pin delivers the selected internal frequency for system-wide clock distribution.
What calibration capabilities does the MAX1415AEWE+ provide?
The MAX1415AEWE+ supports on-demand offset and gain self-calibration, plus system calibration using external reference inputs. Calibration coefficients are stored in user-accessible registers, enabling field recalibration without firmware changes. Drift errors are removed by periodic recalibration at operating temperature.
Is the MAX1415AEWE+ pin-compatible with the AD7705 or MX7705?
Yes, the MAX1415AEWE+ is explicitly designed as a pin-compatible upgrade to the AD7705 and MX7705. It retains identical pinout, register map, and serial interface behavior while adding internal clocking, improved INL (±0.0015% vs. ±0.003%), and lower power consumption.
MAX1415AEWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- MUX-PGA-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:
- 2.7V ~ 3.6V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1415AEWE+ FAQ
1.How can I place an order for MAX1415AEWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1415AEWE+ 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 MAX1415AEWE+ reliable?
The price and inventory of MAX1415AEWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1415AEWE+ is usually 5 days.
3.What payment methods are accepted for MAX1415AEWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1415AEWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1415AEWE+?
MAX1415AEWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1415AEWE+ 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 MAX1415AEWE+?
For technical support, including MAX1415AEWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1415AEWE+ requirements.
6.How does Aetrix verify that MAX1415AEWE+ is sourced from the original manufacturer or authorized distributors?
All MAX1415AEWE+ 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 MAX1415AEWE+ meets industry standards.
7.What is the process for return or replacement of MAX1415AEWE+?
All MAX1415AEWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1415AEWE+, 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 MAX1415AEWE+ part is unused and in its original packaging.
Return procedure for MAX1415AEWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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