Overview
The AD9681BBCZRL7-125 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 AD9681 operates at a conversion rate of up to 125 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 device is housed in a 144-ball CSP-BGA package, measuring 10 mm x 10 mm, and is specified over the industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14-bit | |
| Number of Channels | 8 | |
| Conversion Rate | Up to 125 MSPS | |
| Power Consumption per Channel | 110 mW at 125 MSPS | |
| Signal-to-Noise Ratio (SNR) | 74 dBFS (to Nyquist) | |
| Spurious Free Dynamic Range (SFDR) | 90 dBc (to Nyquist) | |
| Differential Nonlinearity (DNL) | ±0.8 LSB (typical) | |
| Integral Nonlinearity (INL) | ±1.2 LSB (typical) | |
| Crosstalk (worst adjacent channel, 70 MHz, −1 dBFS) | −83 dB typical | |
| Analog Input Voltage Range | 2 V p-p differential | |
| Supply Voltage | 1.8 V | |
| Package Type | 144-Ball CSP-BGA (10 mm x 10 mm x 1.7 mm) | |
| Operating Temperature Range | −40°C to +85°C |
Key Features
- Low power consumption with 110 mW per channel at 125 MSPS and scalable power options.
- Serial LVDS (ANSI-644, default) and low power, reduced signal option (similar to IEEE 1596.3).
- Data and frame clock outputs for capturing data and signaling new output bytes.
- 650 MHz full power analog bandwidth and 2 V p-p input voltage range.
- Serial port control with flexible bit orientation and programmable clock and data alignment.
- Built-in and custom digital test pattern generation via SPI interface.
- Power-down and standby modes with individual channel power-down support.
- Small footprint with eight ADCs in a 10 mm x 10 mm package.
Applications
- Medical Imaging: The AD9681 is suitable for high-resolution imaging applications due to its high dynamic performance and low power consumption.
- Communications Receivers: Ideal for wireless communication systems requiring high-speed ADCs with low power and compact packaging.
- Multichannel Data Acquisition: Used in systems that require simultaneous sampling of multiple analog channels with high accuracy and low noise.
Q & A
- What is the resolution and number of channels of the AD9681?
The AD9681 is a 14-bit, octal (8-channel) analog-to-digital converter.
- What is the maximum conversion rate of the AD9681?
The AD9681 operates at a conversion rate of up to 125 MSPS.
- How much power does the AD9681 consume per channel at 125 MSPS?
The device dissipates 110 mW per channel at 125 MSPS.
- What is the signal-to-noise ratio (SNR) of the AD9681?
The SNR is 74 dBFS (to Nyquist).
- What type of package does the AD9681 come in?
The AD9681 is housed in a 144-Ball CSP-BGA package measuring 10 mm x 10 mm x 1.7 mm.
- What is the operating temperature range of the AD9681?
The device operates over the industrial temperature range of −40°C to +85°C.
- Does the AD9681 require external reference or driver components?
No external reference or driver components are required for many applications.
- What types of digital test patterns can the AD9681 generate?
The AD9681 can generate built-in deterministic and pseudorandom patterns, as well as custom user-defined test patterns via the SPI interface.
- What are the key features of the AD9681's serial port control?
The serial port control offers flexible bit orientation, programmable clock and data alignment, and support for power-down and standby modes.
- In which applications is the AD9681 commonly used?
The AD9681 is commonly used in medical imaging, communications receivers, and multichannel data acquisition systems.
