Features and Benefits
- JESD204B (Subclass 1) coded serial digital outputs
- Lane rates up to 16 Gbps
- 1.6 W total power at 1300 MSPS
- 800 mW per ADC channel
- SNR = 65.6 dBFS at 172 MHz (1.59 VP-P input range)
- SFDR = 78 dBFS at 172.3 MHz (1.59 VP-P input range)
- Noise density
- −153.9 dBFS/Hz (1.59 VP-P input range)
- −155.6 dBFS/Hz (2.04 VP-P input range)
- 0.95 V, 1.8 V, and 2.5 V supply operation
- No missing codes
- Internal ADC voltage reference
- Flexible input range
- 1.36 VP-P to 2.04 VP-P (1.59 VP-P typical)
- 2 GHz usable analog input full power bandwidth
- >95 dB channel isolation/crosstalk
- Amplitude detect bits for efficient AGC implementation
- 2 integrated digital downconverters per ADC channel
- 48-bit NCO
- Programmable decimation rates
- Differential clock input
- SPI control
- Integer clock divide by 2 and divide by 4
- Flexible JESD204B lane configurations
- On-chip dithering to improve small signal linearity
The AD9695 is a dual, 14-bit, 1300 MSPS/625 MSPS analog-to-digital converter (ADC). The device has an on-chip buffer and a sample-and-hold circuit designed for low power, small size, and ease of use. This product is designed to support communications applications capable of direct sampling wide bandwidth analog signals of up to 2 GHz. The −3 dB bandwidth of the ADC input is 2 GHz. The AD9695 is optimized for wide input bandwidth, high sampling rate, excellent linearity, and low power in a small package.
The dual ADC cores feature a multistage, differential pipelined architecture with integrated output error correction logic. Each ADC features wide bandwidth inputs supporting a variety of user-selectable input ranges. An integrated voltage reference eases design considerations. The analog input and clock signals are differential inputs. The ADC data outputs are internally connected to four digital downconverters (DDCs) through a crossbar mux. Each DDC consists of multiple signal processing stages: a 48-bit frequency translator (numerically controlled oscillator (NCO)), and decimation filters. The NCO has the option to select up to 16 preset bands over the general-purpose input/output (GPIO) pins, or use a coherent fast frequency hopping mechanism for band selection. Operation of the AD9695 between the DDC modes is selectable via SPI-programmable profiles.
In addition to the DDC blocks, the AD9695 has several functions that simplify the automatic gain control (AGC) function in a communications receiver. The programmable threshold detector allows monitoring of the incoming signal power using the fast detect control bits in Register 0x0245 of the ADC. If the input signal level exceeds the programmable threshold, the fast detect indicator goes high. Because this threshold indicator has low latency, the user can quickly turn down the system gain to avoid an overrange condition at the ADC input. In addition to the fast detect outputs, the AD9695 also offers signal monitoring capability. The signal monitoring block provides additional information about the signal being digitized by the ADC.
The user can configure the Subclasss 1 JESD204B-based high speed serialized output using either one lane, two lanes, or four lanes, depending on the DDC configuration and the acceptable lane rate of the receiving logic device. Multidevice synchronization is supported through the SYSREF± and SYNCINB± input pins.
The AD9695 has flexible power-down options that allow significant power savings when desired. All of these features can be programmed using a 3-wire serial port interface (SPI) and or PDWN/STBY pin.
The AD9695 is available in a Pb-free, 64-lead LFCSP and is specified over the −40°C to +105°C junction temperature range. This product may be protected by one or more U.S. or international patents.
Note that, throughout this data sheet, multifunction pins, such as FD_A/GPIO_A0, are referred to either by the entire pin name or by a single function of the pin, for example, FD_A, when only that function is relevant.
- Low power consumption per channel.
- JESD204B lane rate support up to 16 Gbps.
- Wide, full power bandwidth supports intermediate frequency (IF) sampling of signals up to 2 GHz.
- Buffered inputs ease filter design and implementation.
- Four integrated wideband decimation filters and NCO blocks supporting multiband receivers.
- Programmable fast overrange detection.
- On-chip temperature diode for system thermal management.
- Diversity multiband, multimode digital receivers
- 3G/4G, TD-SCDMA, WCDMA, GSM, LTE
- General-purpose software radios
- Ultrawideband satellite receiver
- Spectrum analyzers
- Network analyzers
- Integrated RF test solutions
- Electronic support measures, electronic counter measures, and electronic counter-counter measures
- High speed data acquisition systems
- DOCSIS 3.0 CMTS upstream receive paths
- Hybrid fiber coaxial digital reverse path receivers
- Wideband digital predistortion
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
The AD9695-1300EBZ / AD9695-625EBZ supports the AD9695, a 14-bit, 1300MSPS / 625MSPS dual analog-to-digital converter (ADC). The device has an on-chip buffer and a sample-and-hold circuit designed for low power, small size, and ease of use. This device is designed to support direct RF sampling analog signals of up to 2 GHz. The AD9695 is optimized for wide input bandwidth, high sampling rate, excellent linearity, and low power in a small package.
This reference design provides all of the support circuitry required to operate the ADC in its various modes and configurations. It is designed to interface directly with the ADS7-V2EBZ data capture card, allowing users to download captured data for analysis. The device control and subsequent data analyses can now be done using the ACE software package.
The AD9695-1300EBZ can be used to evaluate the AD9697 as the performance is identical except for power consumption.
Features & Benefits
- Full featured evaluation board for the AD9695-1300 / AD9695-625.
- JESD204B coded serial digital outputs with support for lane rates up to 16Gbps/lane.
- Wide full power bandwidth supports IF sampling of signals up to 2GHz.
- Four Integrated wide-band decimation filter and NCO blocks supporting multi-band receivers.
- Flexible SPI interface controls various product features and functions to meet specific system requirements.
- Programmable fast over range detection and signal monitoring.
When connected to a specified Analog Devices high speed adc evaluation board, the ADS8-V1 works as a data acquistion board. Designed to support the highest speed JESD204B A/D Converters, the FPGA on the ADS8-V1 acts as the data receiver, while the ADC is the data transmitter.
Tools & Simulations
Virtual Eval - BETA
Virtual Eval is a web application to assist designers in product evaluation of ADCs, DACs, and other ADI products. Using detailed models on Analog’s servers, Virtual Eval simulates crucial part performance characteristics within seconds. Configure operating conditions such as input tones and external jitter, as well as device features like gain or digital down-conversion. Performance characteristics include noise, distortion, and resolution, FFTs, timing diagrams, response plots, and more.
This command line executable tool generates a Verilog module which implements the JESD204 receive transport layer. The user specifies in a configuration file one or more modes to be supported by the transport layer module. These modes are defined as a set of JESD204 parameter values: L, M, F, S, N', and CF. The transport layer converts JESD204 lane data output from a JESD204 link layer IP to a data bus with a fixed width, containing interleaved virtual converter samples. Both JESD204B and JESD204C link layers are supported.
The JESD204x Frame Mapping Table Generator tool consists of two Windows executables that will allow the user to input any valid combination of JESD204x parameters (L, M, F, S, NP) in order to output a .csv file that illustrates the frame mapping of the JESD204x mode in table format. There is an executable that allows the user to input a single JESD204x mode and another, that allows the user to input the parameters for multiple JESD204x modes in a specified .csv format in order to output a .csv file that illustrates the frame mapping of each of the JESD204x modes that were input into separate tables.
3rd Party Solutions (1)
FPGA Interoperability Reports (2)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Support & Discussions
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.