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Analog Devices Inc./Maxim Integrated MAX120CNG+
- Part No.:
- MAX120CNG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX120CNG+.pdf
- Description:
- IC ADC 12BIT SAR 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,025
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Product details
Overview
MAX120CNG+ 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 requiring only decoupling capacitors. It delivers 1.6µs conversion time, ±1 LSB INL, and 70dB SINAD at 100kHz input - ideal for high-speed data acquisition in digital-signal processing systems.
For engineers reviewing the MAX120CNG+ datasheet, MAX120CNG+ pinout, MAX120CNG+ application, or MAX120CNG+ equivalent, key selection considerations include its 24-pin narrow DIP package, TTL/CMOS-compatible µP interface, continuous-conversion mode support, ±15V overvoltage tolerance on AIN, and compatibility with FIFO-buffered architectures to minimize µP interrupt overhead.
Technical Context
The MAX120CNG+ employs successive approximation architecture with an internal 6kΩ || 10pF analog input impedance and 350ns acquisition time. Its track/hold circuit operates in tracking mode between conversions and transitions to hold mode within 10ns of CONVST falling edge, exhibiting 30ps typical aperture jitter.
It supports five µP interface modes (including full-control, ROM, and continuous-conversion), uses a two's-complement output format, and features a MODE pin that configures INT/BUSY as either interrupt or busy signal - enabling flexible integration with microprocessors, DMA controllers, or FIFO buffers without wait states.
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 throughput at 8MHz clock, suitable for real-time waveform capture |
| Analog Input Range | ±5V bipolar - accepts differential or single-ended signals referenced to AGND, tolerant to ±15V fault conditions |
| Integral Nonlinearity | ±1 LSB - ensures accurate amplitude representation across full scale, critical for precision measurement |
| SINAD | 70dB min at 100kHz - supports >11.3 effective number of bits (ENOB) for high-fidelity signal reconstruction |
| Reference Output | -5.00V ±25ppm/°C - low-drift buried-zener source requiring 22µF || 0.1µF bypassing for stable ADC operation |
| Power Dissipation | 210mW at VDD = +5V, VSS = -12V - enables thermally constrained embedded designs without forced cooling |
Pinout & Package
MAX120CNG+ is housed in a 24-pin narrow plastic DIP (PDIP) package with 0.3-inch body width and through-hole mounting. Pin spacing follows standard 0.1-inch grid; lead finish is lead(Pb)-free/RoHS-compliant.
| 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 - determines status signaling behavior |
| 2 (VSS) | Negative power supply | Accepts -10.8V to -15.75V - powers analog core and reference; must be decoupled to AGND |
| 3 (VDD) | Positive power supply | Accepts +4.75V to +5.25V - powers digital logic and interface; requires 0.1µF + 10µF bypassing |
| 4 (AIN) | Analog input | ±5V bipolar input with 6kΩ || 10pF impedance - overvoltage tolerant to ±15V, eliminating need for external protection |
| 5 (VREF) | Reference output | -5.00V buried-zener source - must be bypassed with 22µF electrolytic || 0.1µF ceramic to AGND for <100mΩ ESR compliance |
| 6 (AGND) | Analog ground | Reference return for analog circuitry - must be isolated from DGND and tied 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 | Return path for digital I/O - kept separate from AGND except at star ground point |
| 20 (CONVST) | Convert start | Falling-edge-triggered - initiates conversion and places T/H into hold mode; asynchronous to CLKIN |
| 21 (CLKIN) | Master clock input | TTL-compatible, 0.1–8MHz - defines conversion timing; 13–14 cycles per conversion depending on synchronization |
| 22 (INT/BUSY) | Status output | Configurable as interrupt (low pulse on completion) or busy (low during conversion) - drives external logic or µP wait state |
| 23 (CS) | Chip select | Active-low enable for data outputs - when low with RD, enables D11–D0; can initiate conversion with CONVST and RD |
| 24 (RD) | Read strobe | Active-low data read control - when CS is low, enables outputs; can initiate conversion if CONVST and CS are low |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold | 350ns acquisition time eliminates need for external sample-hold IC and reduces board space |
| Built-in -5V reference | 20ppm/°C drift (typical) and ±25ppm/°C max - removes dependency on external precision reference |
| Overvoltage-tolerant input | Withstands ±15V on AIN pin - protects against transients in industrial sensor interfaces without clamping diodes |
| FIFO-compatible interface | Direct connection to IDT7200-style FIFOs - enables autonomous data streaming and reduces µP interrupt load by >90% |
| Five configurable interface modes | Supports stand-alone, continuous-conversion, ROM, slow-memory, and full-control - adapts to µP capability and system latency requirements |
Applications
| Digital Signal Processing | Audio and Telecom Processing |
|---|---|
Use Scenario: Real-time spectral analysis of RF front-end signals in baseband receivers using FFT-based algorithms. IC Role / Device Role / Timing Role: High-speed ADC capturing 500ksps I/Q samples with low THD (-77dB) and high SFDR (77dB) to preserve signal integrity. Use Value: Enables accurate detection of adjacent-channel interference and spurious emissions without external amplification or filtering. | Use Scenario: Digitizing analog voice channels in VoIP gateways and telecom line cards with wide dynamic range. IC Role / Device Role / Timing Role: Bipolar ±5V input interface accepting conditioned audio signals; two's-complement output simplifies DSP arithmetic. Use Value: Delivers 70dB SINAD at 50kHz, supporting G.711-compliant 16-bit PCM encoding with minimal quantization noise. |
| Speech Recognition Systems | High-Speed Data Acquisition |
Use Scenario: Capturing acoustic waveforms from MEMS microphones in embedded voice assistants for neural network inference. IC Role / Device Role / Timing Role: Low-latency ADC with 1.6µs conversion and 350ns acquisition - synchronizes with wake-word trigger events. Use Value: Supports 16kHz sampling with <1µs timing jitter, ensuring temporal alignment critical for MFCC feature extraction. | Use Scenario: Monitoring voltage/current transients in motor drive inverters for predictive maintenance and fault logging. IC Role / Device Role / Timing Role: Overvoltage-tolerant ±15V input handling fast-rising spikes; continuous-conversion mode streams data to external FIFO. Use Value: Eliminates µP polling overhead and captures sub-microsecond anomalies without data loss at 500ksps sustained rate. |
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 |
|---|---|---|---|
| MAX122CNG+ | 2.6µs conversion time, 333ksps throughput, 5MHz max clock - lower speed but improved THD (-85dB typ) and SFDR (78dB) | Better suited for lower-bandwidth, higher-fidelity applications like spectrum analyzers where SNR dominates over speed | Select MAX122CNG+ when 333ksps suffices and -85dB THD improves harmonic rejection in narrowband signal analysis |
| ADS7822U | 2.5µs conversion, 200ksps, SPI interface, single +5V supply - no negative rail or internal reference required | Targets low-power, space-constrained portable instruments where dual-supply complexity must be avoided | Choose ADS7822U for battery-powered handheld testers needing simplified power design and serial interface, not parallel µP bus |
Compared with MAX122CNG+, the MAX120CNG+ trades 167ksps higher throughput for slightly higher THD; versus ADS7822U, it provides faster parallel interfacing and superior dynamic performance at the cost of dual-supply implementation effort.
Availability
MAX120CNG+ is available at Aetrix Electronics and suitable for digital-signal processing, audio and telecom processing, and high-speed data acquisition requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for MAX120CNG+ 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX120/MAX122 product line was designed specifically for high-throughput, precision data acquisition systems requiring integrated signal conditioning - combining track/hold, reference, and parallel µP interface in a single 24-pin package.
FAQ
What is the maximum clock frequency supported by MAX120CNG+?
The MAX120CNG+ supports a maximum clock frequency of 8MHz in modes 1–4, and 6MHz in continuous-conversion mode (mode 5) to satisfy the 350ns acquisition time requirement. This allows 500ksps throughput in standard operation and enables precise timing control for synchronized sampling applications.
Does MAX120CNG+ require external components for basic operation?
Yes, the MAX120CNG+ requires external decoupling capacitors: 0.1µF and 10µF on VDD, 0.1µF and 22µF (ESR ≤100mΩ) on VREF to AGND, and optional 5Ω resistor in series with noisy +5V supplies. No external track/hold capacitor or reference is needed - all are integrated.
Can MAX120CNG+ operate with a single +5V supply?
No, the MAX120CNG+ requires dual supplies: +4.75V to +5.25V on VDD and -10.8V to -15.75V on VSS. The internal -5V reference and analog front-end architecture depend on the negative rail; operation with only +5V is not supported and will damage the device.
How does the MODE pin affect MAX120CNG+ functionality?
The MODE pin configures the INT/BUSY output: tied to VDD yields interrupt signaling (pulse low on conversion complete), tied to DGND or left open yields busy signaling (low during conversion). This determines how the host processor detects data readiness - critical for optimizing µP wait-state efficiency.
Is MAX120CNG+ RoHS-compliant?
Yes, the MAX120CNG+ carries the '+' suffix indicating a lead(Pb)-free and RoHS-compliant package. It meets EU Directive 2011/65/EU requirements and is suitable for environmentally regulated industrial and medical equipment designs.
MAX120CNG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX120CNG+ FAQ
1.How can I place an order for MAX120CNG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX120CNG+ 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 MAX120CNG+ reliable?
The price and inventory of MAX120CNG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX120CNG+ is usually 5 days.
3.What payment methods are accepted for MAX120CNG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX120CNG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX120CNG+?
MAX120CNG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX120CNG+ 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 MAX120CNG+?
For technical support, including MAX120CNG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX120CNG+ requirements.
6.How does Aetrix verify that MAX120CNG+ is sourced from the original manufacturer or authorized distributors?
All MAX120CNG+ 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 MAX120CNG+ meets industry standards.
7.What is the process for return or replacement of MAX120CNG+?
All MAX120CNG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX120CNG+, 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 MAX120CNG+ part is unused and in its original packaging.
Return procedure for MAX120CNG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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