Overview
The AD6684BCPZ-500 is a high-performance, 135 MHz quad intermediate frequency (IF) receiver produced by Analog Devices Inc. This device is optimized for wide input bandwidth, excellent linearity, and low power consumption, making it suitable for various high-frequency signal processing applications. The AD6684 features a differential pipelined architecture with integrated output error correction logic and supports a variety of user-selectable input ranges. It also includes an integrated voltage reference, which simplifies design considerations. The device is packaged in a 72-lead Lead Frame Chip Scale Package (LFCSP), ensuring a compact and efficient design.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 14 | - | - | Bits |
| Offset Error | 0 | - | - | % FSR |
| Gain Error | -5.0 | - | +5.0 | % FSR |
| Differential Nonlinearity (DNL) | -0.7 | ±0.4 | +0.7 | LSB |
| Integral Nonlinearity (INL) | -5.1 | ±1.0 | +5.1 | LSB |
| Temperature Drift - Offset Error | - | - | 8 | ppm/°C |
| Temperature Drift - Gain Error | - | - | 214 | ppm/°C |
| Internal Voltage Reference | - | 0.5 | - | V |
| Input Referred Noise | - | 2.6 | - | LSB rms |
| Analog Input Voltage Range | 1.44 | 1.80 | 2.16 | V p-p |
| Common-Mode Voltage (VCM) | - | 1.34 | - | V |
| Differential Input Capacitance | - | 1.75 | - | pF |
| Differential Input Resistance | - | 200 | - | Ω |
Key Features
- Differential pipelined architecture with integrated output error correction logic.
- Wide bandwidth inputs supporting user-selectable input ranges.
- Integrated voltage reference for simplified design.
- Excellent linearity and low power consumption.
- 72-lead Lead Frame Chip Scale Package (LFCSP) for compact design.
- Each ADC connected internally to two Digital Down-Converters (DDCs) through a crossbar mux.
- Up to five cascaded signal processing stages in each DDC, including a 48-bit frequency translator, NCO, and up to four half-band decimation filters.
- NSR (Noise Shaping Requantizer) circuitry for improved SNR performance within a limited frequency band.
- Supports two different output modes selectable via the serial port interface (SPI).
Applications
The AD6684BCPZ-500 is designed for various high-frequency signal processing applications, including:
- GSM, LTE, and W-CDMA receivers.
- Wideband IF receivers in communication systems.
- High-frequency data acquisition systems.
- Radar and electronic warfare systems.
- Other applications requiring high-bandwidth, high-linearity ADCs.
Q & A
- What is the resolution of the AD6684BCPZ-500?
The AD6684BCPZ-500 has a resolution of 14 bits. - What is the operating temperature range of the AD6684BCPZ-500?
The device operates over a temperature range of −40°C to +105°C. - What type of package does the AD6684BCPZ-500 come in?
The AD6684BCPZ-500 is packaged in a 72-lead Lead Frame Chip Scale Package (LFCSP). - Does the AD6684BCPZ-500 have an integrated voltage reference?
Yes, the AD6684BCPZ-500 includes an integrated voltage reference. - What are the key features of the analog inputs on the AD6684BCPZ-500?
The analog inputs are differential, with programmable input voltage ranges and a common-mode voltage of 1.34 V. The inputs also have a differential input capacitance of 1.75 pF and a differential input resistance of 200 Ω. - How does the NSR feature improve performance in the AD6684BCPZ-500?
The NSR (Noise Shaping Requantizer) circuitry improves SNR performance within a limited frequency band within the Nyquist bandwidth. - What types of signal processing stages are included in the DDCs of the AD6684BCPZ-500?
Each DDC consists of up to five cascaded signal processing stages, including a 48-bit frequency translator, NCO, and up to four half-band decimation filters. - Can the output modes of the AD6684BCPZ-500 be configured?
Yes, the AD6684BCPZ-500 supports two different output modes that can be selected via the serial port interface (SPI). - What are some typical applications for the AD6684BCPZ-500?
The AD6684BCPZ-500 is used in GSM, LTE, W-CDMA receivers, wideband IF receivers, high-frequency data acquisition systems, and radar and electronic warfare systems. - How is the clock input treated in the AD6684BCPZ-500?
The clock input should be treated as an analog signal to avoid aperture jitter affecting the dynamic range.
