Overview
The AD6649BCPZRL7, produced by Analog Devices Inc., is a mixed-signal intermediate frequency (IF) receiver designed for high-performance communications applications. It features dual 14-bit, 250 MSPS analog-to-digital converters (ADCs) and a wideband digital downconverter (DDC). This device is optimized for low cost, small size, wide bandwidth, and versatility, making it ideal for various communication systems such as CDMA2000 and GSM/EDGE.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 14 Bits | - | - | - |
| Sampling Rate | - | 250 | - | MSPS |
| Input Range | - | 1.75 V p-p | - | - |
| Offset Error | - | ±10 mV | - | - |
| Gain Error | -5.5% | - | +2.5% | %FSR |
| Temperature Drift (Offset Error) | - | ±5 ppm/°C | - | - |
| Temperature Drift (Gain Error) | - | ±100 ppm/°C | - | - |
| Input Referred Noise (VREF = 1.75 V, 25°C) | - | 1.32 LSB rms | - | - |
| Supply Voltage | 1.7 V | - | 1.8 V | - |
| Nominal Supply Current | - | 271 mA | - | - |
| Power Dissipation | - | 1.16 W | - | - |
| Package | - | 64-VFQFN Exposed Pad, CSP | - | - |
Key Features
- Dual 14-bit, 250 MSPS ADCs with multistage, differential pipelined architecture and integrated output error correction logic.
- Wideband digital downconverter (DDC) with four cascaded signal processing stages: 32-bit frequency translator (NCO), optional sample rate converter, fixed FIR filter, and fS/4 fixed-frequency NCO.
- Programmable threshold detector for automatic gain control (AGC) and fast detect output bits to monitor incoming signal power.
- Integrated voltage reference and duty cycle stabilizer to maintain excellent ADC performance.
- Support for ANSI or reduced swing LVDS signal levels on the 14-bit output port.
- 1.8 V SPI port for register programming and readback.
Applications
The AD6649BCPZRL7 is designed for various high-performance communications applications, including:
- CDMA2000 and GSM/EDGE systems.
- Wireless infrastructure and base stations.
- Radar and electronic warfare systems.
- Medical imaging and diagnostic equipment.
- High-speed data acquisition systems.
Q & A
- What is the resolution and sampling rate of the AD6649BCPZRL7?
The AD6649BCPZRL7 features dual 14-bit ADCs with a sampling rate of 250 MSPS. - What is the input range of the ADCs?
The ADCs support a variety of user-selectable input ranges, with a typical full-scale input range of 1.75 V p-p. - What is the purpose of the digital downconverter (DDC) in the AD6649BCPZRL7?
The DDC provides processing flexibility with four cascaded signal processing stages: a 32-bit frequency translator (NCO), an optional sample rate converter, a fixed FIR filter, and an fS/4 fixed-frequency NCO. - How does the AD6649BCPZRL7 support automatic gain control (AGC)?
The device includes a programmable threshold detector that monitors the incoming signal power and provides fast detect output bits to adjust the system gain. - What is the package type and number of pins for the AD6649BCPZRL7?
The AD6649BCPZRL7 is packaged in a 64-VFQFN Exposed Pad, CSP with 64 pins. - What are the supply voltage and nominal supply current requirements for the AD6649BCPZRL7?
The device operates with a supply voltage of 1.7 V to 1.8 V and has a nominal supply current of 271 mA. - What is the power dissipation of the AD6649BCPZRL7?
The power dissipation is approximately 1.16 W. - What interface does the AD6649BCPZRL7 use for register programming and readback?
The device uses a 1.8 V SPI port for register programming and readback. - What are the typical applications of the AD6649BCPZRL7?
The AD6649BCPZRL7 is used in CDMA2000 and GSM/EDGE systems, wireless infrastructure, radar and electronic warfare systems, medical imaging, and high-speed data acquisition systems. - What is the significance of the duty cycle stabilizer in the AD6649BCPZRL7?
The duty cycle stabilizer compensates for variations in the ADC clock duty cycle, ensuring excellent performance of the converters.
