Overview
The AD9257BCPZ-40 is an octal, 14-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed for low cost, low power, small size, and ease of use, making it ideal for applications where high dynamic performance and compact packaging are critical.
The AD9257 operates at conversion rates of up to 65 MSPS and features an on-chip sample-and-hold circuit. It requires a single 1.8 V power supply and supports LVPECL-, CMOS-, and LVDS-compatible sample rate clocks. The ADC also includes features such as automatic sample rate clock multiplication for the appropriate LVDS serial data rate and individual channel power-down capabilities.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14-bit | |
| Conversion Rate | Up to 65 MSPS | |
| Power Supply | 1.8 V | |
| Power Consumption per Channel | 55 mW at 65 MSPS | |
| Signal-to-Noise Ratio (SNR) | 75.5 dB (to Nyquist) | |
| Spurious-Free Dynamic Range (SFDR) | 91.6 dBc (to Nyquist) | |
| Differential Nonlinearity (DNL) | ±0.6 LSB (typical) | |
| Integral Nonlinearity (INL) | ±1.1 LSB (typical) | |
| Input Resistance | 30 kΩ at 25°C | |
| Input Capacitance | 2 pF at 25°C | |
| Package | 64-Lead LFCSP (9mm x 9mm w/ EP) | |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- Low power consumption: 55 mW per channel at 65 MSPS with scalable power options.
- High dynamic performance: SNR = 75.5 dB (to Nyquist) and SFDR = 91.6 dBc (to Nyquist).
- Serial LVDS output with ANSI-644 compliance and reduced signal option similar to IEEE 1596.3.
- Individual channel power-down capability, consuming less than 2 mW when all channels are disabled.
- No external reference or driver components required for many applications.
- Programmable clock and data options for flexibility.
- Data clock output (DCO) and frame clock output (FCO) for data capture and signaling.
Applications
- Medical imaging equipment: Suitable for high-resolution imaging applications.
- Communications receivers: Ideal for IF sampling in WCDMA, CDMA-One, CDMA-2000, and TDS-CDMA systems.
- Battery-powered instruments: Low power consumption makes it suitable for portable devices.
- Hand-held scopemeters and spectrum analyzers: Compact size and high performance are beneficial for these applications.
- Power-sensitive military applications: The low power and high dynamic range make it suitable for military use.
Q & A
- What is the resolution of the AD9257BCPZ-40?
The AD9257BCPZ-40 has a resolution of 14 bits.
- What are the conversion rates supported by the AD9257BCPZ-40?
The AD9257BCPZ-40 supports conversion rates up to 65 MSPS.
- What is the power supply requirement for the AD9257BCPZ-40?
The AD9257BCPZ-40 requires a single 1.8 V power supply.
- What is the typical power consumption per channel at 65 MSPS?
The typical power consumption per channel at 65 MSPS is 55 mW.
- What is the Signal-to-Noise Ratio (SNR) of the AD9257BCPZ-40?
The SNR of the AD9257BCPZ-40 is 75.5 dB (to Nyquist).
- What is the Spurious-Free Dynamic Range (SFDR) of the AD9257BCPZ-40?
The SFDR of the AD9257BCPZ-40 is 91.6 dBc (to Nyquist).
- What is the typical Differential Nonlinearity (DNL) of the AD9257BCPZ-40?
The typical DNL of the AD9257BCPZ-40 is ±0.6 LSB.
- What is the typical Integral Nonlinearity (INL) of the AD9257BCPZ-40?
The typical INL of the AD9257BCPZ-40 is ±1.1 LSB.
- What is the package type and size of the AD9257BCPZ-40?
The AD9257BCPZ-40 comes in a 64-Lead LFCSP package with dimensions of 9mm x 9mm w/ EP.
- What is the operating temperature range of the AD9257BCPZ-40?
The operating temperature range of the AD9257BCPZ-40 is -40°C to +85°C.
