Overview
The MAX1422ECM+TD is a 12-bit, 20Msps analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This ADC is designed for low-power, high dynamic performance applications, particularly in imaging and digital communications. It operates from a single 3.3V supply, consuming only 137mW while delivering a 67dB (typ) signal-to-noise ratio (SNR) at a 5MHz input frequency and a 20Msps sampling frequency. The device features a fully differential input, pipelined, 12-stage ADC architecture with wideband track-and-hold (T/H) and digital error correction, ensuring high-speed conversion with minimal power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 bits | |
| Sampling Frequency | 20 Msps | |
| Supply Voltage | 3.3 V | V |
| Power Consumption | 137 mW | mW |
| Signal-to-Noise Ratio (SNR) | 67 dB (typ) at 5 MHz input | dB |
| Input Bandwidth | 400 MHz (small signal -3dB bandwidth) | MHz |
| Reference Voltage | Internal 2.048 V precision bandgap reference | V |
| Package Type | 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) | °C |
Key Features
- Single 3.3V power supply
- Fully differential input, pipelined, 12-stage ADC architecture with wideband track-and-hold (T/H) and digital error correction
- Internal 2.048V precision bandgap reference with flexible reference structure for internal or external reference modes
- Low power consumption with power-down modes (reference power-down and full shutdown)
- Parallel, offset binary, CMOS-compatible three-state outputs
- Small signal -3dB bandwidth of 400 MHz, allowing for high-frequency input signals
Applications
- CCD Pixel Processing
- Data Acquisition
- IF and Baseband Digitization
- Medical Ultrasound Imaging
- Radar
- IR Focal Plane Arrays
Q & A
- What is the resolution and sampling frequency of the MAX1422ECM+TD?
The MAX1422ECM+TD has a resolution of 12 bits and a sampling frequency of 20 Msps.
- What is the power consumption of the MAX1422ECM+TD?
The MAX1422ECM+TD consumes 137 mW of power.
- What is the signal-to-noise ratio (SNR) of the MAX1422ECM+TD at a 5 MHz input frequency?
The SNR is 67 dB (typ) at a 5 MHz input frequency.
- What is the input bandwidth of the MAX1422ECM+TD?
The small signal -3dB bandwidth is 400 MHz.
- What types of reference modes are available for the MAX1422ECM+TD?
The MAX1422ECM+TD supports internal reference mode, buffered external reference mode, and unbuffered external reference mode.
- What are the power-down modes available for the MAX1422ECM+TD?
The device features reference power-down and full shutdown modes to reduce power consumption during idle periods.
- What is the package type and size of the MAX1422ECM+TD?
The MAX1422ECM+TD is packaged in a 48-pin TQFP with dimensions of 7mm x 7mm x 1.4mm.
- What are the typical operating temperature ranges for the MAX1422ECM+TD?
The device operates over the commercial temperature range of 0°C to +70°C and the extended industrial temperature range of -40°C to +85°C.
- What are some common applications of the MAX1422ECM+TD?
Common applications include CCD Pixel Processing, Data Acquisition, IF and Baseband Digitization, Medical Ultrasound Imaging, and Radar.
- Is the MAX1422ECM+TD available in other sampling frequencies?
Yes, pin-compatible higher-speed versions are available, such as the MAX1421 for 40 Msps and the MAX1420 for 60 Msps.
