Overview
The MAX1422 is a 12-bit, 20Msps analog-to-digital converter (ADC) designed by Analog Devices Inc./Maxim Integrated. This device is optimized for low-power, high dynamic performance applications, particularly in imaging and digital communications. It operates from a single 3.3V supply, making it highly efficient for various high-speed data acquisition needs.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 12 bits |
| Sampling Rate | 20 Msps |
| Supply Voltage | 3.3V |
| Signal-to-Noise Ratio (SNR) | 67 dB at fIN = 5 MHz |
| Input Type | Fully differential, wideband track-and-hold (T/H) amplifier |
| Internal Reference | 2.048V precision bandgap reference |
| Power Consumption | 137 mW (typ), 10 µW (shutdown mode) |
| Package | 48-pin TQFP, 7mm x 7mm x 1.4mm |
| Operating Temperature Range | 0°C to +70°C (commercial), -40°C to +85°C (extended industrial) |
Key Features
- Single 3.3V power supply
- 67 dB SNR at fIN = 5 MHz
- Internal 2.048V precision bandgap reference
- Fully differential, wideband track-and-hold (T/H) amplifier
- Power-down modes: reference power-down and full shutdown
- Parallel, offset binary, CMOS-compatible three-state outputs
- Small signal -3dB bandwidth of 400 MHz
- Flexible reference structure for internal or external reference
Applications
- CCD Pixel Processing
- Data Acquisition
- IF and Baseband Digitization
- Medical Ultrasound Imaging
- Radar
Q & A
- What is the resolution and sampling rate of the MAX1422 ADC?
The MAX1422 has a 12-bit resolution and a sampling rate of 20 Msps.
- What is the power supply requirement for the MAX1422?
The MAX1422 operates from a single 3.3V supply.
- What is the signal-to-noise ratio (SNR) of the MAX1422 at 5 MHz input frequency?
The SNR is 67 dB at an input frequency of 5 MHz.
- Does the MAX1422 have an internal reference?
Yes, it has an internal 2.048V precision bandgap reference.
- What are the power-down modes available in the MAX1422?
The MAX1422 features two power-down modes: reference power-down and full shutdown.
- What is the package type and size of the MAX1422?
The MAX1422 is available in a 48-pin TQFP package, measuring 7mm x 7mm x 1.4mm.
- What are the typical operating temperature ranges for the MAX1422?
The device operates over the commercial (0°C to +70°C) and extended industrial (-40°C to +85°C) temperature ranges.
- Can the MAX1422 be used with single-ended inputs?
Yes, the fully differential input stage can be operated with single-ended inputs.
- What are some of the key applications of the MAX1422?
Key applications include CCD pixel processing, data acquisition, IF and baseband digitization, medical ultrasound imaging, and radar.
- Is there an evaluation kit available for the MAX1422?
Yes, the MAX1420 evaluation kit (EV kit) can be used to evaluate the performance of the MAX1422.
