the HMC1122 needs only 6 bit for programming, but the standart SPI transmitts 8 bit. Can I clock two "don't care bits" first or does it work only if there are actually 6 bits clocked in?
this is the block diagram of HMC1122, when I was testing this IC using multimeter
I found that:
1. pin 5 and pin 6 are connected with package base GND.
2. pin 7,8 to pin 12 are connected together with pin 6 and pin 13 in DC.
3. pin 7,8 to pin…
HMC1122 digital step attenuator - settling time is 250ns. I would like to know switching control frequency - the max rate at which attenuator control word can be given.
We are going to buy a DSA evaluation board. I am beginner with these stuff... We are between HMC472a , HMC1122 & HMC624a.
1) Could you please help choosing? Which DSA is best for our specifications? We will buy the evaluation board of one of…
I have a technical question about this product.
We are going to connect this device to SPI bus.
Is is okay to connect directly SEROUT to SPI bus (MISO). Do we need a tri-state buffer ?
Thank you in advance.
In datasheet, it says we should pull down or D0-D5 when it is in serial mode. But what about digital port in parallel mode? Should we let them float or pull them low. Thanks.
What are the differences between glitch free, safe state and no protection transitions in digital step attenuators (DSA)?
Digital Step Attenuators usually have an array of attenuator stages internally and turning on or off the different stages…