Overview
The MAX1121EGK+D, produced by Analog Devices Inc./Maxim Integrated, is a high-performance 8-bit analog-to-digital converter (ADC) designed for wideband applications. This monolithic ADC operates at conversion rates of up to 250 million samples per second (Msps) and is optimized for outstanding dynamic performance at high intermediate frequencies (IF) up to 500 MHz. It is particularly suited for applications requiring high-speed and high-accuracy signal conversion, such as digital predistortion in cellular base-station transceiver systems, wireless and wired broadband communication, and various test and measurement equipment.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 8-bit | |
| Conversion Rate | Up to 250 Msps | |
| Supply Voltage | 1.8 V | |
| Power Dissipation | 477 mW at 250 Msps | |
| Signal-to-Noise Ratio (SNR) | 48.9 dB at 10 MHz | |
| Spurious-Free Dynamic Range (SFDR) | 68 dBc at 100 MHz input | |
| Analog Input | Differential or single-ended, AC- or DC-coupled | |
| Clock Input | Selectable on-chip divide-by-2 clock circuit, up to 500 MHz | |
| Digital Outputs | LVDS compatible, two’s complement or offset binary format | |
| Package | 68-pin QFN with exposed pad (EP) | |
| Temperature Range | -40°C to +85°C |
Key Features
- High-speed conversion rate of up to 250 Msps
- Excellent signal-to-noise ratio (SNR) of 48.9 dB at 10 MHz
- Spurious-free dynamic range (SFDR) of 68 dBc at 100 MHz input
- Single 1.8 V supply voltage
- Low power dissipation of 477 mW at 250 Msps
- On-chip track-and-hold and internal reference
- Selectable on-chip divide-by-2 clock circuit
- LVDS digital outputs with data clock output
- Evaluation kit available (MAX1124EVKIT)
Applications
- Wireless and wired broadband communication
- Digital oscilloscopes
- Digital predistortion in cellular base-station transceiver systems
- Communications test equipment
- Radar and satellite subsystems
- Antenna array processing
- Instrumentation
Q & A
- What is the maximum conversion rate of the MAX1121?
The MAX1121 has a maximum conversion rate of up to 250 Msps.
- What is the supply voltage requirement for the MAX1121?
The MAX1121 operates on a single 1.8 V supply voltage.
- What is the power dissipation of the MAX1121 at 250 Msps?
The power dissipation of the MAX1121 at 250 Msps is 477 mW.
- What type of analog input does the MAX1121 support?
The MAX1121 supports differential or single-ended analog inputs, which can be AC- or DC-coupled.
- What is the SFDR of the MAX1121 at an input frequency of 100 MHz?
The SFDR of the MAX1121 at an input frequency of 100 MHz is 68 dBc.
- What type of digital outputs does the MAX1121 provide?
The MAX1121 provides LVDS compatible digital outputs in two’s complement or offset binary format.
- What is the package type and temperature range of the MAX1121?
The MAX1121 is available in a 68-pin QFN package with an exposed pad and is specified over the industrial temperature range of -40°C to +85°C.
- Is an evaluation kit available for the MAX1121?
- What are some common applications of the MAX1121?
The MAX1121 is commonly used in wireless and wired broadband communication, digital oscilloscopes, digital predistortion in cellular base-station transceiver systems, communications test equipment, radar and satellite subsystems, antenna array processing, and instrumentation.
- How does the MAX1121 handle clock input?
The MAX1121 features a selectable on-chip divide-by-2 clock circuit, allowing clock frequencies as high as 500 MHz.
