Overview
The AD9250BCPZRL7-250 is a dual, 14-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed to support communications applications where low cost, small size, wide bandwidth, and versatility are essential. The AD9250 features a multistage, differential pipelined architecture with integrated output error correction logic, ensuring high accuracy and performance. It operates with sampling speeds of up to 250 MSPS and supports a variety of user-selectable input ranges. An integrated voltage reference and a duty cycle stabilizer are also included to ease design considerations and maintain excellent performance despite variations in the ADC clock duty cycle.
Key Specifications
| Parameter | Temperature | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | Full | 14 | 14 | 14 | Bits |
| Sampling Rate | - | - | - | 250 | MSPS |
| Offset Error | Full | -16 | - | +16 | mV |
| Gain Error | Full | -6 | - | +2.5 | %FSR |
| Differential Nonlinearity (DNL) | Full | ±0.75 | - | ±0.75 | LSB |
| Integral Nonlinearity (INL) | Full | ±2.1 | - | ±3.5 | LSB |
| Input Span | Full | 1.75 | - | 1.75 | V |
| Input Resistance | Full | 12 | 16 | 20 | kΩ |
| Operating Temperature | - | -40 | - | +85 | °C |
| Package Type | - | - | - | 48-Lead LFCSP | - |
| Power Supply | - | - | - | 1.8 V | - |
Key Features
- Integrated dual, 14-bit ADC with sampling speeds of up to 250 MSPS.
- Multistage, differential pipelined architecture with integrated output error correction logic.
- Wide bandwidth inputs supporting various user-selectable input ranges.
- Integrated voltage reference and duty cycle stabilizer for improved performance.
- JESD204B high-speed serial interface with CML voltage levels, reducing board routing and pin count requirements.
- Flexible power-down options for significant power savings.
- Programmable overrange level detection via dedicated fast detect pins.
- 3-wire SPI-compatible serial interface for setup and control.
- On-chip phase-locked loop (PLL) for ADC sampling clock multiplication.
- Optional RF clock input to ease system board design.
- Proprietary differential input maintaining excellent SNR performance for input frequencies up to 400 MHz.
Applications
The AD9250 is primarily designed for communications applications, including but not limited to:
- Wireless infrastructure and base stations.
- Software-defined radios.
- Medical imaging and diagnostic equipment.
- High-speed data acquisition systems.
- Test and measurement instruments.
The device's versatility, low cost, and small size make it suitable for a wide range of applications requiring high-speed and high-accuracy analog-to-digital conversion.
Q & A
- What is the resolution of the AD9250 ADC?
The AD9250 is a 14-bit analog-to-digital converter.
- What are the sampling rates supported by the AD9250?
The AD9250 supports sampling rates of up to 250 MSPS.
- What type of serial interface does the AD9250 use?
The AD9250 uses the JESD204B high-speed serial interface.
- What is the operating temperature range of the AD9250?
The AD9250 operates over an industrial temperature range of -40°C to +85°C.
- What is the package type of the AD9250?
The AD9250 is available in a 48-lead LFCSP package.
- Does the AD9250 have integrated power-down options?
Yes, the AD9250 has flexible power-down options for significant power savings.
- How is the AD9250 programmed and controlled?
The AD9250 is programmed and controlled using a 3-wire SPI-compatible serial interface.
- What is the purpose of the duty cycle stabilizer in the AD9250?
The duty cycle stabilizer compensates for variations in the ADC clock duty cycle, ensuring excellent performance.
- Does the AD9250 support overrange level detection?
Yes, the AD9250 supports programmable overrange level detection via dedicated fast detect pins.
- What is the power supply requirement for the AD9250?
The AD9250 operates from a single 1.8 V power supply.
