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Analog Devices Inc./Maxim Integrated MAX1415EWE
- Part No.:
- MAX1415EWE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX1415EWE.pdf
- Description:
- 16-BIT 2-CHAN, SIGMA-DELTA ADC
- Quantity:
- Payment:
- Shipping:
Inventory:216
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Product details
Overview
MAX1415EWE 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 ±0.0015% INL (max), 98dB 50Hz/60Hz rejection, and operates from 2.7V to 3.6V - optimized for high-accuracy industrial sensor interfaces such as weigh scales and strain-gauge measurements.
For engineers reviewing the MAX1415EWE datasheet, MAX1415EWE pinout, MAX1415EWE application, or MAX1415EWE equivalent, this device supports SPI/QSPI/MICROWIRE-compatible serial communication, offers on-demand offset/gain self-calibration, and serves as a pin-compatible upgrade to MX7705/AD7705 in buffered or unbuffered differential input configurations.
Technical Context
The MAX1415EWE implements a second-order sigma-delta modulator with digital filtering to achieve 16-bit resolution without missing codes. Its architecture includes a programmable gain amplifier (PGA), selectable input buffering, and dual fully-differential analog input channels (AIN1±, AIN2±) with configurable unipolar/bipolar ranges referenced to an external 1.00V–1.75V differential reference.
It features two internal clock options (1MHz or 2.4576MHz), supports external clocking up to 2.5MHz, and provides >130dB input common-mode rejection at gain ≥8. The device achieves typical RMS noise as low as 0.62µV (buffered, gain=128, fCLKIN=1MHz, ODR=20Hz) and maintains ±4% internal clock accuracy over 0°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage for precision measurement systems. |
| INL (max) | ±0.0015% FSR - enables <1 LSB error across full scale, critical for calibration-critical instrumentation. |
| Supply Voltage | 2.7V to 3.6V - compatible with single 3V battery or regulated 3.3V rails in portable and loop-powered systems. |
| Power Consumption | 1.2mW (max) at 3V - allows continuous operation in power-constrained applications like handheld meters. |
| 50/60Hz Rejection | >98dB - eliminates mains interference without external notch filters, simplifying front-end design. |
| PGA Gain Range | 1 to 128 - supports direct interface to µV-level sensors (e.g., load cells, RTDs) without external amplification. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and process control. |
Pinout & Package
MAX1415EWE is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch), thermally enhanced for stable performance in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply | 2.7V–3.6V main power rail; decoupling capacitor required near pin for noise immunity. |
| GND | Ground reference | Analog/digital common return; separate AGND/DGND not used - single ground plane recommended. |
| SCLK | Serial clock input | Accepts up to 5MHz CMOS clock for SPI/QSPI/MICROWIRE read/write timing control. |
| DIN | Serial data input | Loads configuration registers (e.g., gain, buffer enable, clock select) during CS assertion. |
| DOUT | Serial data output | Three-state output delivering conversion results and status bits; tri-stated when CS high. |
| CS | Chip select | Active-low enables serial interface; must be held low for entire frame transfer (min 100ns setup). |
| DRDY | Data ready indicator | Open-drain output pulses low when conversion completes; used for interrupt-driven sampling. |
| RESET | Hardware reset | Asynchronous active-low signal that clears registers and restarts internal state machine. |
| CLKIN | External clock input | Connect to GND to enable internal oscillator; otherwise accepts 400kHz–2.5MHz CMOS clock. |
| CLKOUT | Crystal/resonator connection | Drives crystal (e.g., 2.4576MHz) between CLKIN and CLKOUT when internal oscillator selected. |
| AIN1+, AIN1− | Differential channel 1 input | Fully differential pair; supports buffered/unbuffered modes via S1/S2 switch control. |
| AIN2+, AIN2− | Differential channel 2 input | Independent second channel; multiplexed internally with AIN1 for sequential conversions. |
| REF+, REF− | Differential reference input | Accepts 1.00V–1.75V external reference; sets full-scale range for both input channels. |
| S1, S2 | Buffer mode control | Internally controlled switches: open in buffered mode, closed in unbuffered mode. |
Key Features
| Feature | Design Value |
|---|---|
| On-demand self-calibration | Offset and gain calibration initiated by register write - eliminates system-level drift without host intervention. |
| Programmable input buffering | Configurable per-channel buffer enable/disable - optimizes input impedance (≥1GΩ unbuffered vs ~100kΩ buffered) for sensor matching. |
| Integrated PGA | Gain 1–128 with <0.5ppm/°C drift - replaces discrete op-amp stages and reduces board area/cost. |
| High-rejection digital filter | Notch at 25/50Hz or 20/60Hz - suppresses line-frequency interference in medical and industrial settings. |
| Low-power shutdown | 2µA typical power-down current - extends battery life in intermittent-sampling applications. |
Applications
| Industrial Weigh Scales | Strain-Gauge Measurement Systems |
|---|---|
|
Use Scenario: High-resolution weight measurement in platform scales and hopper load cells using mV/V bridge outputs. IC Role / Device Role / Timing Role: Primary ADC digitizing differential bridge signals with PGA gain scaling and 50/60Hz line rejection. Use Value: Achieves ≤1mg resolution at 10kg full scale with ±0.0015% INL and on-chip calibration eliminating manual zero/span adjustments. |
Use Scenario: Static and dynamic strain monitoring in structural health and test benches with quarter/half/full Wheatstone bridges. IC Role / Device Role / Timing Role: Dual-channel sigma-delta ADC acquiring synchronized strain and temperature compensation signals. Use Value: Enables ratiometric measurement with shared REF+ and eliminates external instrumentation amplifiers via integrated PGA and buffer. |
| Loop-Powered Transmitters | RTD/Thermocouple Interfaces |
|
Use Scenario: 4–20mA field transmitters powered from 2-wire loop, requiring ultra-low power and high noise immunity. IC Role / Device Role / Timing Role: Low-power ADC converting sensor voltage to digital output while consuming <1.2mW to preserve loop headroom. Use Value: Supports 3.6V max supply and 2µA shutdown mode - fits within 3.5mA loop budget for smart transmitter microcontrollers. |
Use Scenario: Precision temperature sensing using Pt100 RTDs or Type-K thermocouples in HVAC and process control. IC Role / Device Role / Timing Role: ADC with programmable gain and cold-junction compensation reference path handling µV-level thermocouple outputs. Use Value: Delivers 0.1°C RTD accuracy and <1µV RMS noise at gain=128 - meets Class A RTD tolerance without external chopper amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7705BRUZ | 16-bit, 2-channel, 5V-only supply (4.75–5.25V); no internal oscillator; requires external clock and reference. | Lacks integrated oscillator and PGA - needs external components for same functionality as MAX1415EWE. | Select AD7705BRUZ only if existing 5V system lacks space for 3V regulation and can accommodate external clock/reference. |
| ADS1220IPWR | 24-bit, 4-channel, 2.7–5.5V supply; integrated PGA (1–128), VREF, and burn-out current sources; SPI interface. | Higher resolution and channel count but higher power (350µA typ vs 400µA max); no 50/60Hz notch filter. | Choose ADS1220IPWR when 24-bit resolution and 4-channel acquisition outweigh need for built-in line-frequency rejection. |
Compared with AD7705BRUZ and ADS1220IPWR, the MAX1415EWE uniquely combines 16-bit precision, integrated 1/2.4576MHz oscillator, 98dB 50/60Hz rejection, and 2.7–3.6V operation - making it optimal for cost-sensitive, low-power, single-supply industrial sensor nodes where line noise immunity is critical.
Availability
MAX1415EWE is available at Aetrix Electronics and suitable for industrial instruments, weigh scales, and loop-powered systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX1415EWE 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 and mixed-signal ICs for industrial, medical, and communications applications.
The MAX1415EWE belongs to Maxim's high-accuracy sigma-delta ADC product line, engineered specifically for low-noise, low-power sensor signal conditioning in harsh electromagnetic environments.
FAQ
What is the operating voltage range for the MAX1415EWE?
The MAX1415EWE operates from 2.7V to 3.6V. This single-supply range supports battery-powered and 3.3V-regulated industrial systems. Operation outside this range may cause functional failure or permanent damage, as specified in the absolute maximum ratings (VDD to GND: –0.3V to +6V).
Does the MAX1415EWE include an internal oscillator?
Yes, the MAX1415EWE integrates a factory-trimmed internal oscillator selectable between 1MHz and 2.4576MHz via the CLK register bit. When enabled, CLKIN must be tied to GND. External clocking (400kHz–2.5MHz) is also supported for synchronization or higher accuracy requirements.
How does the MAX1415EWE handle 50Hz and 60Hz interference?
The MAX1415EWE uses a digital filter with programmable notches at 25Hz/50Hz or 20Hz/60Hz, achieving >98dB normal-mode and >150dB common-mode rejection. This eliminates the need for external analog notch filters in weigh scales, medical devices, and industrial transmitters.
Can the MAX1415EWE interface directly with RTD or thermocouple sensors?
Yes - the MAX1415EWE supports direct RTD and thermocouple interfacing via its fully differential inputs, programmable PGA (1–128), and optional input buffering. With a stable external reference (e.g., 1.225V), it achieves sub-µV RMS noise and supports ratiometric measurement for high-accuracy temperature systems.
What is the pin-compatible upgrade path from the MAX1415EWE?
The MAX1415EWE is explicitly designed as a pin-compatible upgrade to the MX7705 and AD7705. It retains identical pinout, register map, and serial interface timing while adding internal oscillator, improved INL (±0.0015% vs ±0.003%), and lower power consumption (1.2mW vs ~2.5mW).
MAX1415EWE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500
- Number of Inputs:
- 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- 3-Wire, Microwire, QSPI, SPI
- Configuration:
- MUX-PGA-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- 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:
- Internal Oscillator, PGA
- Operating Temperature:
- -45°C ~ 85°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1415EWE FAQ
1.How can I place an order for MAX1415EWE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1415EWE 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 MAX1415EWE reliable?
The price and inventory of MAX1415EWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1415EWE is usually 5 days.
3.What payment methods are accepted for MAX1415EWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1415EWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1415EWE?
MAX1415EWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1415EWE 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 MAX1415EWE?
For technical support, including MAX1415EWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1415EWE requirements.
6.How does Aetrix verify that MAX1415EWE is sourced from the original manufacturer or authorized distributors?
All MAX1415EWE 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 MAX1415EWE meets industry standards.
7.What is the process for return or replacement of MAX1415EWE?
All MAX1415EWE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1415EWE, 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 MAX1415EWE part is unused and in its original packaging.
Return procedure for MAX1415EWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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