Overview
The AD9255BCPZRL7-80 is a 14-bit, 125 MSPS analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed to support high-performance applications in communications, instrumentation, and medical imaging, where low power consumption, small size, and versatility are crucial. The ADC features a multistage, differential pipelined architecture with integrated output error correction logic, ensuring 14-bit accuracy at 125 MSPS data rates and guaranteeing no missing codes over the full operating temperature range.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Resolution | Bits | 14 | 14 | 14 |
| Sample Rate | MSPS | - | - | 125 |
| SNR | dBFS | - | 78.3 @ 70 MHz | - |
| SFDR | dBc | - | 93 @ 70 MHz | - |
| Power Consumption | mW | - | 371 @ 125 MSPS | - |
| Analog Supply Voltage | V | 1.8 | 1.8 | 1.8 |
| Output Supply Voltage | V | 1.8 | 1.8 | 1.8 |
| Operating Temperature Range | °C | -40 | - | +85 |
| Input Impedance | Ω | 200 | - | - |
| Package Type | - | - | 48-Lead LFCSP | - |
Key Features
- Proprietary differential input maintaining excellent SNR performance for input frequencies up to 300 MHz.
- Operation from a single 1.8 V supply and a separate digital output driver supply accommodating 1.8 V CMOS or LVDS outputs.
- Standard serial port interface (SPI) supporting various product features and functions, such as data formatting, enabling the clock DCS, power-down, test modes, and voltage reference mode.
- Optional on-chip dither function to improve SFDR performance with low power analog input signals.
- Integrated ADC sample-and-hold inputs and programmable internal ADC voltage reference.
- Flexible power-down options for significant power savings.
- Pin compatibility with the AD9265, allowing a simple migration up to 16 bits.
Applications
- Communications: Multimode digital receivers (3G), GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, and TD-SCDMA.
- Smart antenna systems.
- General-purpose software radios.
- Broadband data applications.
- Ultrasound equipment.
Q & A
- What is the resolution and sample rate of the AD9255?
The AD9255 is a 14-bit ADC with a sample rate of up to 125 MSPS.
- What are the typical SNR and SFDR values for the AD9255 at 70 MHz and 125 MSPS?
The typical SNR is 78.3 dBFS, and the typical SFDR is 93 dBc at 70 MHz and 125 MSPS.
- What is the power consumption of the AD9255 at 125 MSPS?
The power consumption is approximately 371 mW at 125 MSPS.
- What are the supported output data formats for the AD9255?
The ADC output data format is either parallel 1.8 V CMOS or LVDS (DDR).
- How is the AD9255 programmed for setup and control?
Programming is accomplished using a 3-wire SPI-compatible serial interface.
- What is the operating temperature range of the AD9255?
The operating temperature range is from −40°C to +85°C.
- What package type is the AD9255 available in?
The AD9255 is available in a Pb-free, 48-lead LFCSP.
- Does the AD9255 support on-chip dither functionality?
Yes, the AD9255 has an optional on-chip dither function to improve SFDR performance with low power analog input signals.
- What are some of the key applications for the AD9255?
The AD9255 is suitable for communications, multimode digital receivers, smart antenna systems, general-purpose software radios, broadband data applications, and ultrasound equipment.
- Is the AD9255 pin-compatible with other ADC models?
Yes, the AD9255 is pin-compatible with the AD9265, allowing a simple migration up to 16 bits.
