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Xilinx XC7K410T-2FFG676i Technical Detail

The Xilinx XC7K410T-2FFG676i FPGA belongs to the Kintex-7 family and is available in different speed grades such as -2L, -1L, -1, -2, and -3. The -3-speed grade is with the highest possible performance. Whereas, -2L speed grade is preferred to be utilized for applications where requirements for low maximum possible static power are required. This device is capable of operating in low core voltages. The industrial temperature devices of -2L are capable of operating at VCCINT to be 0.95V only. The extended temperature devices of -2L can perform at VCCINT=0.9V and sometimes at 1.0V too. The devices of -2LE speed grade can perform at VCCINT=1.0V. The devices of -2LI can operate at VCCINT=0.95V. The specifications for -2LI devices are almost the same as that for -2 devices with an exception of some points. The dynamic power, static power, and speed consideration are reduced for -2LE devices when these operate in the VCCINT to be 0.9V. The military temperature devices -1L are having the same speed consideration as that for -1 military temperature devices.

The Xilinx XC7K410T-2FFG676i AC and DC features are divided into temperature ranges of commercial, expanded, industrial, military, and extended. An exception is considered for the operating temperature range, apart from that all of its AC and DC characteristics and electrical parameters are similar for a specific speed grade device. For example, characteristics of timing for devices of -1 speed grade are the same as for -1 devices of commercial temperature speed grade. Nevertheless, a selected range of devices or their speed grades is available for every range of temperature. For instance, -1Q is available for the Kintex-7 XA family and -1M is available only for the Kintex-7 defense-grade family.

Absolute Maximum Rating of Xilinx XC7K410T-2FFG676i

If any stress or force is applied to the Xilinx XC7K410T-2FFG676i device beyond mentioned absolute maximum rating may or may not result in damaging the IC forever. Furthermore, constant and regular exposure of the device to its absolute maximum ratings may also result in its non-reliable performance. For the device, its lower absolute voltage specifications are also always applied. The maximum possible limit of the device applies to DC signals and its minimum and maximum overshoot and undershoot specifications for AC voltages must be considered. Following thermal and soldering guidelines are also important to get the maximum benefit out of the device.

Recommended Conditions of Operation

There are certain recommended operating conditions for Xilinx XC7K410T-2FFG676i which must be followed such as the voltages applied must be relative to ground. For designing the system of power distribution, pin planning, and PCB design guides must be consulted. The VCCBRAM and VCCINT must have a connection to the same point of the same supply. The data of configuration is retained in the device even if VCCO has dropped to 0V. The supported VCCO ranges of the device comprise 3.3V, 1.2V, 2.5V, 1.35V, 1.8V, and 1.5V. The specifications for lower absolute voltages must also be followed for the device. For each bank of the device, the current must not exceed 200mA. The VCCBATT is only needed when bitstream encryption is utilized. In case of the battery is not utilized, then VCCBATT must be connected to VCCAUX or GND. A filtering circuit is required for every voltage range that is listed and for the data rates above 10.3125 Gb/s, VMGTAVCC must be equivalent to 1.0V to consume less power. Furthermore, for less power consumption, VMGTAVCC must also be 1.0V for the entire frequency range of CPLL.

Power Supply Sequence of Xilinx XC7K410T-2FFG676i

There is a specific powering ON sequence required for the Xilinx XC7K410T-2FFG676i that is starting with VCCINT, followed by VCCBRAM, VCCAUX, VCCAUX_IO, and ends at VCCO. This is how the device can minimum possible drawl of current for ensuring the inputs/outputs to be at 3-state during power ON condition. The power OFF sequence is in reverse to that of the power ON condition. In case if VCCBRAM and VCCINT are having similar voltages that are recommended then both of them could be powered through the same supply. Now, if the VCCO, VCCAUX_IO, and VCCAUX are having similar voltages that are recommended then both can be in power ON status through the same supply and can also be ramped together.

The Measurements of Output Delay

The delays at the output of the Xilinx XC7K410T-2FFG676i device are measured with minor output traces. The device is making use of a standard termination for testing. The propagation delay of traces is considered distinctly and then deducted from the measurements that are finalized. This is why the measurement mechanism is not included in the generic test setup for the device. Different parameters such as VMEAS, VREF, CREF, and RREF are describing the testing conditions of every input/output standard. The precise prediction for the propagation delay through a given application is being obtained through the simulation in the IBIS tool. The simulation is conducted in a specific way such that the output driver of a specific choice is to be simulated into a generalized test setup through the use of various values. The VMEAS is to be recorded. The output driver must be simulated into traces of PCB and then loaded through the utilization of an appropriate model at IBIS or with the value of capacitance representing the load. After that VMEAS must be recorded.

Performance of GTX Transceiver

VCCINT is the specified voltage for all speed grades of the device Xilinx XC7K410T-2FFG676i. the devices of -1 speed grade are requiring an internal data width of 4 bytes for its operation beyond 5.0 Gb/s. The device of -2LE speed grade is requiring an internal data width of 4 bytes for its operation beyond 3.8 Gb/s. However, the data rates for the devices are not available among 8.0 Gb/s up to 9.8 Gb/s. The line rates that are beyond 10.3125 Gb/s, the VMGTAVCC is to be 1.05V at the nominal case.

Specifications of XADC

The gain and offset errors are eradicated by enabling the XADC gain through the calibration feature of Xilinx XC7K410T-2FFG676i. However, the values are only specified after the feature is enabled. In case of a variation in reference voltages from any of its nominal values VREFN is to be OV and VREFP is to be 1.25V to result in a slight change from the ideal transfer function. This is also supposed to impact the precision of the measurements of internal sensors such as power supply and temperature.