Overview
The AD6636BBCZ, produced by Analog Devices Inc., is a 150 MSPS wideband digital downconverter (DDC) designed for IF sampling or oversampled baseband radios. This component is optimized for the demanding filtering requirements of various wideband standards such as CDMA2000, UMTS, TD-SCDMA, and WiMAX. It is suitable for radio systems using either IF sampling ADCs or baseband sampling ADCs. The AD6636 features advanced signal processing stages, including frequency translation, cascaded integrated comb filters, FIR and halfband filters, and digital automatic gain control (AGC), making it a versatile solution for complex radio systems.
Key Specifications
| Specification | Value |
|---|---|
| Maximum Input Data Rate | Up to 150 MSPS per input port; up to 300 MSPS with two ports and internal tandem processing |
| Input Ports | Four identical, independent high-speed ADC input ports (A, B, C, D) |
| Input Data Format | 16-bit mantissa and 3-bit exponent (floating-point or fixed-point) |
| Clocking | Internal PLL clock multiplier; clocking on rising or falling edge of input clock |
| Signal Processing Stages | Frequency translator, cascaded integrated comb filter, FIR and halfband filters, programmable coefficient FIR filters, interpolating half-band filter (IHB), digital AGC |
| Interface | Serial or microport interfaces for programming and control |
| Operating Temperature | -40°C to +85°C |
| Package | 256-Lead CSP_BGA |
| Spurious-Free Dynamic Range (SFDR) | Greater than 110 dBc |
Key Features
- Advanced signal processing stages including frequency translation, cascaded integrated comb filters, FIR and halfband filters, and digital AGC.
- Support for multiple input modes: independent inputs, diversity inputs, or complex I/Q inputs.
- High-speed level-detection circuit with minimal latency and maximum flexibility for controlling input signals.
- Input power-monitoring functions and magnitude and phase I/Q correction blocks.
- Internal test signal (PN pseudorandom noise sequence) for built-in self-test (BIST).
- Programmable 16-bit phase-offset word for creating a known phase relationship between multiple AD6636 chips or channels.
- Phase and amplitude dithering to improve spurious performance of the NCO.
Applications
The AD6636BBCZ is designed for use in various radio systems, including those requiring IF sampling or oversampled baseband processing. It is particularly suited for wideband standards such as CDMA2000, UMTS, TD-SCDMA, and WiMAX. Other applications include:
- Baseband and IF sampling radios.
- Wideband communication systems.
- Wireless infrastructure equipment.
- High-performance signal processing systems.
Q & A
- What is the maximum input data rate of the AD6636BBCZ?
The maximum input data rate is up to 150 MSPS per input port, and up to 300 MSPS can be supported using two input ports and internal tandem processing. - How many input ports does the AD6636BBCZ have?
The AD6636BBCZ has four identical, independent high-speed ADC input ports (A, B, C, D). - What is the input data format of the AD6636BBCZ?
The input data format is 16-bit mantissa and 3-bit exponent, supporting both floating-point and fixed-point inputs. - What are the signal processing stages of the AD6636BBCZ?
The signal processing stages include frequency translation, cascaded integrated comb filter, FIR and halfband filters, programmable coefficient FIR filters, interpolating half-band filter (IHB), and digital AGC. - How is programming and control of the AD6636BBCZ accomplished?
Programming and control are accomplished via serial or microport interfaces. - What is the operating temperature range of the AD6636BBCZ?
The operating temperature range is -40°C to +85°C. - What package type is the AD6636BBCZ available in?
The AD6636BBCZ is available in a 256-Lead CSP_BGA package. - What is the Spurious-Free Dynamic Range (SFDR) of the AD6636BBCZ?
The SFDR is greater than 110 dBc. - Does the AD6636BBCZ support phase and amplitude dithering?
Yes, the AD6636BBCZ supports phase and amplitude dithering to improve the spurious performance of the NCO. - Can the AD6636BBCZ be used in multiple radio systems simultaneously?
Yes, the AD6636BBCZ can be used in multiple radio systems, and it supports creating a known phase relationship between multiple chips or channels using a 16-bit phase-offset word.
