Overview
The AD9634BCPZ-250, produced by Analog Devices Inc., is a 12-bit analog-to-digital converter (ADC) designed to support a wide range of communications and high-speed applications. This ADC features sampling speeds of up to 250 million samples per second (MSPS), making it suitable for applications requiring low cost, small size, wide bandwidth, and versatility. The AD9634 utilizes a multistage, differential pipelined architecture with integrated output error correction logic, ensuring high performance and accuracy. It also includes an integrated voltage reference and a duty cycle stabilizer to maintain excellent performance across various input frequencies.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 12 bits |
| Sampling Rate | Up to 250 MSPS |
| Signal-to-Noise Ratio (SNR) | 69.7 dBFS at 185 MHz AIN and 250 MSPS |
| Spurious-Free Dynamic Range (SFDR) | 87 dBc at 185 MHz AIN and 250 MSPS |
| Input Noise | −150.6 dBFS/Hz at 185 MHz, −1 dBFS AIN and 250 MSPS |
| Total Power Consumption | 360 mW at 250 MSPS |
| Supply Voltage | 1.8 V |
| Output Type | LVDS (ANSI-644 levels) |
| Input Clock Divider | Integer 1-to-8, 625 MHz maximum input |
| Analog Input Range | 1.4 V p-p to 2.0 V p-p (1.75 V p-p nominal) |
| Package Type | 32-Lead LFCSP (5mm x 5mm x 0.75mm) |
| Operating Temperature Range | −40°C to +85°C |
Key Features
- Integrated 12-bit ADC with sampling speeds of up to 250 MSPS.
- Proprietary differential input maintains excellent SNR performance for input frequencies up to 350 MHz.
- Fast overrange and threshold detect.
- 3-pin, 1.8 V SPI port for register programming and readback.
- Pin compatibility with the AD9642 and AD6672 for easy migration.
- Flexible analog input range of 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.
- LVDS (ANSI-644 levels) outputs.
- Energy-saving power-down modes.
Applications
- Communications systems.
- Diversity radio systems.
- Multimode digital receivers (3G, TD-SCDMA, WiMAX, W-CDMA, CDMA2000, GSM, EDGE, LTE).
- I/Q demodulation systems.
- Smart antenna systems.
- General-purpose software radios.
- Ultrasound equipment.
- Broadband data applications.
Q & A
- What is the maximum sampling rate of the AD9634BCPZ-250?
The AD9634BCPZ-250 has a maximum sampling rate of up to 250 MSPS.
- What is the resolution of the AD9634BCPZ-250?
The AD9634BCPZ-250 is a 12-bit analog-to-digital converter.
- What are the supply voltage requirements for the AD9634BCPZ-250?
The AD9634BCPZ-250 operates on a 1.8 V supply voltage.
- What type of output does the AD9634BCPZ-250 provide?
The AD9634BCPZ-250 provides LVDS (ANSI-644 levels) outputs.
- What is the operating temperature range of the AD9634BCPZ-250?
The operating temperature range is −40°C to +85°C.
- Does the AD9634BCPZ-250 have an integrated voltage reference?
Yes, the AD9634BCPZ-250 includes an integrated ADC voltage reference.
- What is the purpose of the duty cycle stabilizer in the AD9634BCPZ-250?
The duty cycle stabilizer compensates for variations in the ADC clock duty cycle to maintain excellent performance.
- How is programming for setup and control accomplished on the AD9634BCPZ-250?
Programming is accomplished using a 3-wire, SPI-compatible serial interface.
- What are some of the key applications for the AD9634BCPZ-250?
Key applications include communications systems, diversity radio systems, multimode digital receivers, I/Q demodulation systems, smart antenna systems, general-purpose software radios, ultrasound equipment, and broadband data applications.
- Is the AD9634BCPZ-250 pin-compatible with other ADC models?
Yes, it is pin-compatible with the AD9642 and AD6672, allowing for easy migration.
