U1AFS250-2FG256YI
| Model | U1AFS250-2FG256YI |
| Description | Field Programmable Gate Array, |
| PDF file | Total 334 pages (File size: 18M) |
| Chip Manufacturer | MICROSEMI |
Fusion Family of Mixed Signal FPGAs
Analog-to-Digital Converter Block
At the heart of the Fusion analog system is a programmable Successive Approximation Register (SAR)
ADC. The ADC can support 8-, 10-, or 12-bit modes of operation. In 12-bit mode, the ADC can resolve
500 ksps. All results are MSB-justified in the ADC. The input to the ADC is a large 32:1 analog input
multiplexer. A simplified block diagram of the Analog Quads, analog input multiplexer, and ADC is shown
in
The ADC offers multiple self-calibrating modes to ensure consistent high performance
both at power-up and during runtime.
V
CC
(1.5 V)
AV0
AC0
AG0
AT0
ATRETURN01
AV1
AC1
AG1
AT1
AV2
AC2
AG2
AT2
ATRETURN23
AV3
AC3
AG3
AT3
AV4
AC4
AG4
AT4
ATRETURN45
AV5
AC5
AG5
AT5
AV6
AC6
AG6
AT6
ATRETURN67
AV7
AC7
AG7
AT7
AV8
AC8
AG8
AT8
ATRETURN89
AV9
AC9
AG9
AT9
Pads
Analog
Quad 0
Analog
Quad 1
Analog
Quad 2
Analog
Quad 3
Analog
Quad 4
Analog
Quad 5
Analog
Quad 6
Analog
Quad 7
Analog
Quad 8
Analog
Quad 9
0
1
These are hardwired
connections within
Analog Quad.
Analog MUX
(32 to 1)
12
ADC
Digital Output to FPGA
31
Temperature
Monitor
CHNUMBER[4:0]
Internal Diode
Figure 2-79 •
ADC Block Diagram
Revision 3
2- 99
