@ Adam Taylor blog
The Zynq SoC’s XADC block contains two 12-bit analog-to-digital converters. These ADCs are capable of sampling at up to 1 Msample/sec, with an ideal effective input signal bandwidth of 500kHz (250 kHz on the auxiliary inputs). The XADC can multiplex among 17 analog inputs with additional input channels connected to on-chip voltages and temperature sensors. If your design is pin-limited in terms of available analog-capable inputs for external signals, you can configure the XADC to drive an external analog multiplexer.
文章だと参照性が悪いので箇条書きにする。
- 2 x 12bit ADC
- up to 1 Msample/sec
- effective input signal bandwidth: 500kHz (250kHz on the auxiliary inputs)
- can multiplex among 17 analog inputs
- additional > on-chip voltages sensors
- additional > on-chip temperatura sensors
- can configure to drive an external analog multiplexer
The XADC is capable of unipolar or bipolar measurements—each analog input is differential. The 17 differential inputs are split between one dedicated analog input pair referred to as VP/VN and 16 auxiliary inputs that can be configured as either analog or digital I/O pins, referred to as VAuxP/VAuxN. The effective input signal bandwidth depends upon whether you are using the dedicated VP/VN differential input pair, in which case it is 500kHz, or the auxiliary inputs, in which case the maximum bandwidth is 250KHz.
- each input: differential
- 17 inputs
- 1 for [VP/VN]
- 16 auxiliary for analog or digital I/O pins [VAuxP/VAuxN]
- effective input signal bandwidth depends ...