Overview
The MAX1422 is a 12-bit, 20Msps analog-to-digital converter (ADC) designed by Analog Devices Inc./Maxim Integrated. This ADC is optimized for low-power, high dynamic performance applications, particularly in imaging and digital communications. It operates from a single 3.3V supply and features a fully differential input, pipelined, 12-stage ADC architecture with wideband track-and-hold (T/H) and digital error correction.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 bits | |
| Sampling Rate | 20 Msps | |
| Supply Voltage | 3.3 V | |
| Power Consumption | 137 mW (typ) | |
| Signal-to-Noise Ratio (SNR) | 67 dB (typ) at 5 MHz input frequency | |
| Input Bandwidth | 400 MHz (small signal -3dB bandwidth) | |
| Reference Voltage | 2.048 V (internal precision bandgap reference) | |
| Package | 48-pin TQFP | |
| Operating Temperature Range | 0°C to +70°C (commercial), -40°C to +85°C (extended industrial) |
Key Features
- Single 3.3V power supply
- Internal 2.048V precision bandgap reference
- Differential wideband input T/H amplifier
- Power-down modes: reference power-down and full shutdown
- Low power consumption: 130 mW (reference shutdown mode), 10 µW (shutdown mode)
- Parallel, offset binary, CMOS-compatible three-state outputs
- Space-saving 48-pin TQFP package
Applications
- CCD Pixel Processing
- Data Acquisition
- IF and Baseband Digitization
- Medical Ultrasound Imaging
- Radar
Q & A
- What is the resolution of the MAX1422 ADC?
The MAX1422 has a 12-bit resolution.
- What is the sampling rate of the MAX1422?
The MAX1422 operates at a sampling rate of 20 Msps.
- What is the power supply voltage for the MAX1422?
The MAX1422 operates from a single 3.3V supply.
- What is the typical power consumption of the MAX1422?
The typical power consumption is 137 mW.
- What is the signal-to-noise ratio (SNR) of the MAX1422 at 5 MHz input frequency?
The SNR is 67 dB (typ) at a 5 MHz input frequency.
- What is the input bandwidth of the MAX1422?
The small signal -3dB bandwidth is 400 MHz.
- Does the MAX1422 have an internal reference voltage?
Yes, it has an internal 2.048V precision bandgap reference.
- What are the power-down modes available in the MAX1422?
The MAX1422 features reference power-down and full shutdown modes.
- What is the package type of the MAX1422?
The MAX1422 is available in a 48-pin TQFP package.
- What are the operating temperature ranges for the MAX1422?
The operating temperature ranges are 0°C to +70°C (commercial) and -40°C to +85°C (extended industrial).
