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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:1,747
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Product details
Overview
The MAX120EWG from Maxim Integrated is a 12-bit, 500ksps BiCMOS sampling analog-to-digital converter with integrated track/hold and -5V buried-zener reference, operating from ±5V analog input range and -10.8V to -15.75V dual supplies, designed for high-speed data acquisition in digital-signal processing and spectrum analysis systems.
For engineers reviewing the MAX120EWG datasheet, MAX120EWG pinout, MAX120EWG application, or MAX120EWG equivalent, key selection criteria include its 1.6µs conversion time, ±1 LSB integral nonlinearity over -40°C to +85°C, 24-pin wide SO package, TTL/CMOS-compatible µP interface, and bipolar two's-complement output format.
Technical Context
The MAX120EWG implements successive approximation architecture with on-chip track/hold circuitry featuring 350ns acquisition time and 10ns aperture delay. Its internal -5V reference exhibits ±25ppm/°C drift and requires 22µF || 0.1µF bypassing at VREF to AGND.
It supports five µP interface modes (full-control, stand-alone, slow-memory, ROM, continuous-conversion) via MODE, CONVST, RD, and CS inputs, and delivers 70dB minimum SINAD and -77dB maximum THD at 100kHz input under 500ksps sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with no missing codes over temperature |
| Conversion Time | 1.6µs - enables 500ksps sustained throughput with minimal dead time between samples |
| Analog Input Range | ±5V - supports bipolar signals without external level-shifting; tolerant to ±15V overvoltage |
| Reference Output | -5.00V ±2mV - low-drift buried-zener source requiring 22µF + 0.1µF bypass for stable ADC accuracy |
| Supply Voltages | VDD = +4.75V to +5.25V; VSS = -10.8V to -15.75V - dual-supply operation essential for full ±5V input swing |
| SINAD | 70dB min at 100kHz - defines usable dynamic range for baseband signal fidelity in DSP applications |
| Power Dissipation | 210mW typical - enables operation in thermally constrained embedded systems without forced cooling |
Pinout & Package
MAX120EWG is housed in a 24-pin wide SO (Small Outline) package, RoHS-compliant and rated for -40°C to +85°C industrial operation.
| 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 single-conversion BUSY mode |
| 2 (VSS) | Negative power supply | Accepts -10.8V to -15.75V; must be decoupled to AGND with 0.1µF + 10µF capacitors |
| 3 (VDD) | Positive power supply | Accepts +4.75V to +5.25V; bypassing critical for noise-sensitive comparator performance |
| 4 (AIN) | Analog input | ±5V bipolar input with 6kΩ || 10pF equivalent impedance; overvoltage tolerant to ±15V |
| 5 (VREF) | Internal reference output | -5.00V reference requiring 22µF electrolytic || 0.1µF ceramic bypass to AGND |
| 6 (AGND) | Analog ground | Must be isolated from DGND except at single-point low-impedance supply return |
| 7–11, 13–19 (D11–D0) | Three-state data outputs | 12-bit two's-complement parallel bus; compatible with 12-bit or wider µP data buses |
| 12 (DGND) | Digital ground | Separate plane from AGND; tied only at power supply entry point per layout best practice |
| 20 (CONVST) | Convert start input | Falling-edge triggered; initiates conversion and places T/H into hold mode |
| 21 (CLKIN) | External clock input | TTL-compatible; accepts 0.1MHz to 8MHz for MAX120EWG; determines conversion timing precision |
| 22 (INT/BUSY) | Status output | Configurable as interrupt (low pulse on completion) or busy flag (low during conversion) |
| 23 (CS) | Chip-select input | Active-low; enables data outputs when RD is low; can initiate conversion with RD and CONVST |
| 24 (RD) | Read input | Active-low; enables data outputs when CS is low; can initiate conversion with CS and CONVST |
Key Features
| Feature | Design Value |
|---|---|
| On-chip track/hold | Eliminates need for external hold capacitor; 350ns acquisition time enables 500ksps throughput |
| Integrated -5V reference | 20ppm/°C drift (typical), ±25ppm/°C max; reduces BOM count and improves system-level accuracy |
| Five µP interface modes | Supports direct FIFO/DMA interfacing (mode 2/5), wait-state µPs (mode 3), and ROM-style access (mode 4) |
| Bipolar two's-complement output | Direct representation of ±5V input range; simplifies DSP arithmetic and eliminates post-processing sign extension |
| Overvoltage-tolerant analog input | Withstands ±15V transients without latch-up or damage; enhances robustness in industrial sensor front-ends |
Applications
| Audio and Telecom Processing | Digital-Signal Processing |
|---|---|
Use Scenario: Digitizing voice-band signals (300Hz–3.4kHz) and wideband telecom channels up to 100kHz in baseband receivers and channel banks. IC Role / Device Role / Timing Role: Primary ADC capturing analog line signals with 70dB SINAD and low THD to preserve SNR in real-time encoding. Use Value: Enables high-fidelity PCM encoding without external op-amp buffering or reference conditioning circuits. | Use Scenario: Real-time FFT-based spectral analysis of vibration, RF, or audio signals in test equipment and embedded analyzers. IC Role / Device Role / Timing Role: High-throughput sampling engine delivering 500ksps with deterministic 1.6µs conversion latency for coherent time-domain capture. Use Value: Supports 100kHz Nyquist bandwidth with sufficient ENOB (>11.6 bits) to resolve fine spectral features in 1024-point FFTs. |
| Speech Recognition and Synthesis | High-Speed Data Acquisition |
Use Scenario: Capturing microphone or codec outputs in embedded voice interfaces where low-latency, low-noise digitization is critical. IC Role / Device Role / Timing Role: Front-end ADC providing clean 12-bit samples synchronized to µP DMA transfers via INT/BUSY handshake. Use Value: Eliminates µP interrupt overhead through FIFO-direct operation (mode 2/5), enabling deterministic real-time inference pipelines. | Use Scenario: Monitoring fast transients in motor control feedback loops, power quality analyzers, or oscilloscope front-ends. IC Role / Device Role / Timing Role: Precision sampling node with ±1 LSB INL and ±5V input range, supporting ±15V fault tolerance in noisy industrial environments. Use Value: Delivers calibrated measurement accuracy without external gain/offset trimming across -40°C to +85°C operating range. |
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 throughput, 5MHz max clock; identical pinout and interface logic | Better suited for lower-power or lower-sample-rate systems where 500ksps is unnecessary | Select MAX122EWG+ when thermal budget or clock source limits constrain MAX120EWG's 8MHz requirement |
| ADS7800U | 12-bit, 1.6µs conversion, but requires external reference and separate track/hold; 24-pin DIP only | Lacks integrated reference and T/H, increasing design complexity and board area | Choose ADS7800U only if legacy DIP footprint or TI ecosystem compatibility outweighs integration benefits |
Compared with MAX122EWG+, the MAX120EWG delivers 50% higher throughput at same power cost; compared with ADS7800U, it reduces component count by integrating reference and T/H while enabling wide SO packaging for compact layouts.
Availability
MAX120EWG is available at Aetrix Electronics and suitable for digital-signal processing, high-speed data acquisition, and audio and telecom processing applications requiring stable component supply across industrial 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 MAX120EWG belongs to the MAX120/MAX122 family of high-speed, integrated ADCs engineered for systems demanding self-contained, low-component-count digitization with guaranteed no-missing-codes performance over temperature.
FAQ
What is the operating temperature range of the MAX120EWG?
The MAX120EWG is specified for industrial operation from -40°C to +85°C. This rating is confirmed in the Ordering Information table and applies to all electrical characteristics unless otherwise noted. The "E" suffix in MAX120EWG explicitly denotes this extended temperature grade, distinguishing it from the commercial-grade "C" variants (0°C to +70°C). Thermal derating curves for power dissipation are provided in the Absolute Maximum Ratings section.
Does the MAX120EWG require external components for basic operation?
Yes - the MAX120EWG requires external decoupling and reference bypass capacitors for stable operation. Specifically: 0.1µF + 10µF capacitors on VDD and VSS to AGND, and a 22µF electrolytic || 0.1µF ceramic capacitor from VREF to AGND. No external track/hold capacitor or reference source is needed, as both are integrated. These values are mandated in the Pin Description and Layout sections to ensure specified INL, SINAD, and reference stability.
How does the MODE pin configure the INT/BUSY output on the MAX120EWG?
The MODE pin on the MAX120EWG selects the behavior of pin 22 (INT/BUSY): when tied to VDD, it functions as an interrupt output (active-low pulse upon conversion completion); when left open or tied to DGND, it functions as a busy flag (low during conversion, high when data is ready). This configuration is detailed in the Pin Description and Operating Modes sections, and affects timing relationships for µP read synchronization.
What clock frequency range is supported by the MAX120EWG?
The MAX120EWG accepts TTL-compatible clock inputs from 0.1MHz to 8MHz, as stated in the General Description and Electrical Characteristics tables. This range applies to all five operational modes except continuous-conversion mode (mode 5), where the maximum clock is limited to 6MHz to satisfy the 350ns acquisition time within two clock cycles. The MAX122EWG variant supports only up to 5MHz.
Is the MAX120EWG pin-compatible with other members of the MAX120/MAX122 family?
Yes - the MAX120EWG shares identical pinout, package dimensions, and interface logic with all MAX120 and MAX122 variants (e.g., MAX120CNG+, MAX122EWG+), including the 24-pin wide SO, PDIP, and SSOP packages. This is confirmed in the Pin Configuration diagram and Ordering Information table. Functional differences (e.g., conversion time, clock range) do not affect physical or electrical pin compatibility.
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:
- Obsolete
- 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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