The AD6636 is a 150 MSPS, wideband, digital downconverter (DDC) product from Analog Devices. The product supports 4/6 independent wideband processing channels, and can process 6 wideband carriers (UMTS, CDMA2000). It also features 4 single-ended or 2 LVDS parallel input ports (16 linear bits plus 3-bit exponent), running at 150 MHz. The AD6636 also supports 300 MSPS input using external interface logic, and has three 16-bit parallel output ports, operating up to 200 MHz. The AD6636 supports real or complex input ports, and can perform quadrature correction and dc correction for complex inputs. The product also supports output rates up to 34 MSPS per channel, and can monitor RMS/peak power of input ports. The AD6636 also has programmable attenuator control, for external gain ranging. The product also features 3 programmable coefficient FIR filters per channel, as well as 2 decimating half-band filters per channel. The AD6636 also has 6 programmable digital AGC loops, with a dynamic range of 96 dB. The product also supports synchronous serial I/O operation (SPI®-, SPORT-compatible), and supports 8-bit or 16-bit microport data formats.
The AD6636 is a 150 MSPS, wide‑band digital downconverter designed for multicarrier, multimode radio receivers such as UMTS, CDMA2000, and WiMAX. It offers up to six independent processing channels, four input ports, and three 16‑bit parallel output ports, with programmable FIR, half‑band, and CIC filters, as well as digital AGC and self‑test features.
The document includes recommended operating conditions, electrical characteristics, timing specifications for parallel, microport, and serial interfaces, pin configurations, and detailed functional block diagrams. Ordering information for both 4‑channel and 6‑channel versions is also provided.
| VDDIO voltage range | 3.0 V – 3.6 V |
|---|---|
| Operating temperature range | -40 °C to +85 °C |
| Maximum input data rate per port | 150 MSPS (300 MSPS with two ports and external logic) |
| Maximum output port clock rate | 200 MHz |
| Signal‑to‑noise ratio | 101 dB |
| Spurious free dynamic range | 110 dB |
| AGC range | 96 dB |
Each input port can accept data at up to 150 MSPS, and two ports can be combined for up to 300 MSPS with external interface logic.
The AD6636 provides six independent digital filtering channels (four‑channel version disables channels 4 and 5).
The device supports a synchronous serial I/O port compatible with SPI, SPORT, and SSR standards.