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Analog Devices Inc./Maxim Integrated MAX120EWG+
- Part No.:
- MAX120EWG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX120EWG+.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,786
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Product details
Overview
MAX120EWG+ from Maxim Integrated is a 12-bit, 500ksps BiCMOS sampling analog-to-digital converter with integrated track/hold and -5V internal reference, operating over -40°C to +85°C. It accepts ±5V bipolar analog inputs, achieves 1.6µs conversion time, and interfaces directly to 12-bit microprocessor buses or FIFO buffers for high-speed data acquisition systems.
For engineers reviewing the MAX120EWG+ datasheet, MAX120EWG+ pinout, MAX120EWG+ application, or MAX120EWG+ equivalent, key selection considerations include its wide SO-24 package, ±5V input range with ±15V overvoltage tolerance, TTL/CMOS-compatible digital interface, and support for five distinct operational modes including continuous-conversion and stand-alone FIFO interfacing.
Technical Context
The MAX120EWG+ employs successive approximation architecture with an on-chip track/hold circuit featuring 350ns acquisition time and 10ns aperture delay. Its internal -5V buried-zener reference provides 20ppm/°C drift and supports external loading up to 5mA.
Digital control uses asynchronous CONVST, RD, and CS inputs with MODE pin configuring INT/BUSY as interrupt or busy output. Conversion timing is synchronized to CLKIN (0.1–8MHz), with fixed 13-clock-cycle operation achievable via precise edge alignment relative to CLKIN rising edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes over full temperature range (-40°C to +85°C) |
| Conversion Time | 1.6µs - enables 500k samples per second throughput in high-speed acquisition |
| Analog Input Range | ±5V bipolar - compatible with industrial sensor outputs and audio signal chains without level-shifting |
| Reference Output | -5.00V ±2% - internally generated, requires 22µF || 0.1µF bypassing at VREF to AGND |
| Power Supply | +5V (VDD) and -12V to -15.75V (VSS) - dual-rail operation supporting true bipolar signal capture |
| SINAD | 70dB min at 100kHz input - ensures >11.6 effective number of bits (ENOB) for spectral analysis |
| Integral Nonlinearity | ±1 LSB - guarantees monotonicity and precision in closed-loop control feedback paths |
Pinout & Package
MAX120EWG+ is housed in a 24-pin Wide SO (Small Outline) package, RoHS-compliant and lead-free, with 0.300-inch body width and standard JEDEC MO-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MODE) | Mode configuration input | Hardwired to VDD for INT output, DGND for BUSY output, or left open for BUSY - determines status signaling behavior |
| 2 (VSS) | Negative power supply | Accepts -10.8V to -15.75V - powers internal analog circuitry and reference buffer |
| 3 (VDD) | Positive power supply | Accepts +4.75V to +5.25V - supplies digital logic and internal DAC |
| 4 (AIN) | Analog input | ±5V bipolar input with ±15V overvoltage tolerance - connects directly to transducer or op-amp output |
| 5 (VREF) | Reference output | -5.00V reference source - must be bypassed with 22µF electrolytic || 0.1µF ceramic to AGND |
| 6 (AGND) | Analog ground | Separate ground return for analog section - must be tied to DGND at single point near power supply |
| 7–11, 13–19 (D11–D0) | Data outputs | Three-state, TTL/CMOS-compatible 12-bit bus - outputs two's-complement codes with 75ns access time |
| 12 (DGND) | Digital ground | Ground return for digital I/O - isolated from AGND except at system star point |
| 20 (CONVST) | Convert start | Falling-edge-triggered - initiates conversion and places T/H into hold mode |
| 21 (CLKIN) | System clock input | TTL-compatible, 0.1–8MHz - defines conversion rate and synchronizes SAR operation |
| 22 (INT/BUSY) | Status output | Configurable as interrupt (active-low pulse) or busy (active-low assertion during conversion) |
| 23 (CS) | Chip select | Active-low enable for data outputs - also initiates conversion when combined with RD and CONVST |
| 24 (RD) | Read strobe | Active-low - enables data outputs and may initiate conversion depending on mode configuration |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold | Eliminates need for external hold capacitor and reduces board space; 350ns acquisition time enables rapid sampling |
| Bipolar ±5V input range | Supports direct connection to differential sensors and audio codecs without external level-shifting circuitry |
| Five configurable interface modes | Enables flexible integration - from full µP control (Mode 1) to FIFO-driven continuous conversion (Mode 5) |
| On-chip -5V reference | Reduces BOM count and improves system stability; 20ppm/°C drift meets precision instrumentation requirements |
| Overvoltage tolerant inputs | Withstands ±15V on AIN - protects against transient coupling and sensor fault conditions in industrial environments |
Applications
| Industrial Data Acquisition | Audio Signal Digitization |
|---|---|
Use Scenario: High-speed monitoring of motor current, voltage, and temperature in programmable logic controller (PLC) backplanes. IC Role / Device Role / Timing Role: ADC front-end capturing synchronized multi-channel analog signals at 500ksps with deterministic latency. Use Value: Enables real-time FFT-based vibration analysis using the 70dB SINAD and 1.6µs conversion time to preserve signal fidelity. | Use Scenario: Digitizing line-level stereo audio for voice recognition preprocessing in embedded edge devices. IC Role / Device Role / Timing Role: Bipolar 12-bit sampling engine accepting ±5V inputs from op-amp stages prior to DSP processing. Use Value: Delivers 11.6 ENOB at 10kHz, meeting SNR requirements for speech synthesis while supporting FIFO buffering to reduce CPU interrupt load. |
| Spectrum Analyzer Front-End | Test & Measurement Instrumentation |
Use Scenario: Real-time RF intermediate frequency (IF) sampling in portable spectrum analyzers operating up to 1.5MHz bandwidth. IC Role / Device Role / Timing Role: High-fidelity digitizer with low THD (-77dB) and spurious-free dynamic range of 77dB for clean spectral representation. Use Value: Supports accurate harmonic distortion measurement due to guaranteed no-missing-codes performance across -40°C to +85°C. | Use Scenario: Precision data logging in environmental monitoring stations requiring long-term calibration stability. IC Role / Device Role / Timing Role: Primary ADC with internal -5V reference and ±1 LSB INL for traceable voltage measurements over extended temperature range. Use Value: Eliminates external reference component while maintaining 20ppm/°C drift - reducing calibration drift and field maintenance intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX122EWG+ | 2.6µs conversion time (333ksps), 5MHz max clock, identical pinout and package | Lower throughput but improved THD (-78dB typ) and SFDR (78dB min) at reduced sample rates | Select MAX122EWG+ when system clock is limited to ≤5MHz and higher dynamic performance at 333ksps is prioritized over speed. |
| ADS7800U | 12-bit, 1.6µs conversion, ±10V input range, requires external reference, SO-24 package | Wider input range but lacks integrated reference and track/hold; higher power (350mW) | Choose ADS7800U only if ±10V input span is mandatory and external reference design is acceptable. |
Compared with MAX122EWG+, the MAX120EWG+ delivers 50% higher throughput at the cost of slightly lower SFDR; versus ADS7800U, it reduces system complexity by integrating reference and T/H but trades off input voltage range flexibility.
Availability
MAX120EWG+ is available at Aetrix Electronics and suitable for industrial data acquisition, audio digitization, spectrum analysis, and test & measurement instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX120EWG+ 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, communications, and computing applications.
The MAX120/MAX122 product line delivers high-speed, high-accuracy ADCs with integrated signal conditioning for applications demanding minimal external components and deterministic timing in harsh thermal environments.
FAQ
What is the operating temperature range for the MAX120EWG+?
The MAX120EWG+ is rated for operation from -40°C to +85°C, making it suitable for industrial and automotive under-hood applications where ambient temperatures exceed commercial-grade limits. This extended temperature grade is confirmed in the Ordering Information table and validated across all electrical specifications in the datasheet.
Does the MAX120EWG+ require external components for basic operation?
Yes - the MAX120EWG+ requires decoupling capacitors on VDD, VSS, and VREF pins: 0.1µF ceramic + 10µF tantalum on VDD/VSS, and 0.1µF ceramic || 22µF electrolytic on VREF to AGND. No external hold capacitor or reference is needed, as both are integrated.
Can the MAX120EWG+ interface directly with a 16-bit microprocessor data bus?
Yes - the MAX120EWG+ features three-state, TTL/CMOS-compatible D11–D0 outputs that connect directly to a 16-bit bus. Its timing parameters (75ns data-access time, 30ns bus-relinquish time) align with common µPs like Intel 80C186 and Motorola 68HC11 without wait states.
How does the MODE pin affect the INT/BUSY function in the MAX120EWG+?
The MODE pin configures the INT/BUSY pin: tied to VDD yields interrupt output (active-low pulse upon conversion completion), while tied to DGND or left open configures it as busy output (active-low during conversion). This setting is fixed at power-up and determines µP polling vs. interrupt-driven data retrieval in the MAX120EWG+.
Is the MAX120EWG+ pin-compatible with other members of the MAX120/MAX122 family?
Yes - the MAX120EWG+ shares identical pinout and package (24-pin Wide SO) with MAX120CWG+, MAX120CAG+, MAX120ENG+, and MAX122EWG+. All variants use the same functional diagram, timing characteristics, and PCB footprint, enabling drop-in replacement within the same temperature grade.
MAX120EWG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V, -10.8V ~ 15.75V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX120EWG+ FAQ
1.How can I place an order for MAX120EWG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX120EWG+ 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 MAX120EWG+ reliable?
The price and inventory of MAX120EWG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX120EWG+ is usually 5 days.
3.What payment methods are accepted for MAX120EWG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX120EWG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX120EWG+?
MAX120EWG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX120EWG+ 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 MAX120EWG+?
For technical support, including MAX120EWG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX120EWG+ requirements.
6.How does Aetrix verify that MAX120EWG+ is sourced from the original manufacturer or authorized distributors?
All MAX120EWG+ 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 MAX120EWG+ meets industry standards.
7.What is the process for return or replacement of MAX120EWG+?
All MAX120EWG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX120EWG+, 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 MAX120EWG+ part is unused and in its original packaging.
Return procedure for MAX120EWG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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