Overview
The AD9643BCPZ-170 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 AD9643 features a multistage, differential pipelined architecture with integrated output error correction logic and wide bandwidth inputs supporting various user-selectable input ranges. It operates from a single 1.8 V supply and includes a separate digital output driver supply for LVDS outputs. The device is available in a 64-lead LFCSP package and is specified over the industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Resolution | Bits | 14 | 14 | 14 |
| Sample Rate | MSPS | 170 | - | - |
| SNR | dBFS | - | 70.6 | - |
| SFDR | dBc | - | 85 | - |
| Input Noise | dBFS/Hz | - | −151.6 | - |
| Total Power Consumption | mW | - | 785 | - |
| Supply Voltage | V | 1.8 | 1.8 | 1.8 |
| Output Type | - | LVDS (ANSI-644 levels) | - | - |
| Input Clock Rate | MHz | 625 | 625 | 625 |
| Aperture Delay | ns | 1.0 | 1.0 | 1.0 |
| Aperture Uncertainty (Jitter) | ns | - | - | - |
Key Features
- Integrated dual, 14-bit ADCs with sampling speeds of up to 170 MSPS.
- Operation from a single 1.8 V supply and a separate digital output driver supply accommodating LVDS outputs.
- Proprietary differential input maintains excellent SNR performance for input frequencies of up to 400 MHz.
- SYNC input allows synchronization of multiple devices.
- 3-pin, 1.8 V SPI port for register programming and register readback.
- Pin compatibility with the AD9613, AD6649, and AD6643, allowing simple migration between different bit resolutions.
- Flexible analog input range: 1.4 V p-p to 2.0 V p-p (1.75 V p-p nominal).
- Internal ADC voltage reference and duty cycle stabilizer.
- Energy saving power-down modes.
- Serial port control for setup and control.
- 95 dB channel isolation/crosstalk.
Applications
The AD9643 is primarily designed for communications applications where high-speed data conversion is critical. It is suitable for various use cases such as:
- Wireless infrastructure and base stations.
- Software-defined radios (SDRs).
- Medical imaging and diagnostic equipment.
- High-speed data acquisition systems.
- Radar and surveillance systems.
Q & A
- What is the resolution of the AD9643 ADC?
The AD9643 is a dual, 14-bit analog-to-digital converter.
- What are the sampling rates available for the AD9643?
The AD9643 supports sampling speeds of up to 170 MSPS, 210 MSPS, and 250 MSPS.
- What is the supply voltage for the AD9643?
The AD9643 operates from a single 1.8 V supply and includes a separate digital output driver supply for LVDS outputs.
- What type of output does the AD9643 use?
The AD9643 uses LVDS (ANSI-644 levels) outputs.
- How is the AD9643 programmed and controlled?
Programming for setup and control is accomplished using a 3-wire SPI-compatible serial interface.
- What is the temperature range for the AD9643?
The AD9643 is specified over the industrial temperature range of −40°C to +85°C.
- What are the key features of the AD9643's analog input?
The AD9643 features proprietary differential inputs that maintain excellent SNR performance for input frequencies up to 400 MHz and supports a flexible analog input range of 1.4 V p-p to 2.0 V p-p (1.75 V p-p nominal).
- Can multiple AD9643 devices be synchronized?
Yes, the SYNC input allows synchronization of multiple devices.
- What is the power consumption of the AD9643 at 170 MSPS?
The total power consumption of the AD9643 at 170 MSPS is approximately 785 mW.
- Is there an evaluation board available for the AD9643?
Yes, the AD9643-250EBZ is an evaluation board for the AD9643, which provides all the necessary support circuitry to operate the device in various modes and configurations.
