Part Number: LMH6881 The datasheet says that there is a 8 bit SPI command field consisting of a read/write bit, 3 bits reserved, and a 4 bit address field, but it does not explain the command field. For the read/write bit, is 0=read or is 0=write. For…
Part Number: LMH6881 Hello,
I cannot found specification for dc common voltage input range. I use LMH6881 as single ended amplifier, one input for signal 500 mVpp and second for dc compensation (DAC +/-500 mVDC).
So what input voltage range?
Hi Marco,
Sorry for the delay in reply.
The input impedance plotted in the datasheet is taken using the LMH6881 EVM that takes into account the input pcb traces. The ripple seen in the input impedance curve is probably due to not de-embedding the…
Hi ,Loren,
I`m sorry that I cannot use the lmh6881 very well.One board I make is seems ok to work ,but still have some questions,when the spi pins connect to vcc(5v) with 1.5k ohm resisters,the ID I cannot read.when the spi pins are all floating ,the…
Part Number: LMH6881 Other Parts Discussed in Thread: TINA-TI , Tool/software: TINA-TI or Spice Models Hello,
I have a question about LMH6881 TINA-TI Model.
[Q]
Please tell me how to simulate OIP3 and NF by using TINA or TINA-TI.
The TINA-TI reference…
Other Parts Discussed in Thread: LMH6881 Hi,
The LMH6881 is missing the following DC specifications:
1) Output Voh (max) and Vol (min). I like to check if an over-loaded LMH6881 could damage my ADC
2) OCM input current. I like to know whether I…
Hi Rohit,
Thanks for your thoughts.
We are actually measuring just the output of the amplification stage on a 1GHz oscilloscope.
So the signal chain goes: Voltage signal ---> LMH6881 ---> (Mini-Circuits zx60-3018g) ---> oscilloscope.
The LMH6881 eval…
Other Parts Discussed in Thread: LMH6881 Dear Sir,
May I ask what is Vcm (V) when OCM=1V? And what is Vcm when OCM=1.5V?
LMH6881 Datasheet has only example of OCM=1.25V (Vcm=2.5V).
<Background of question>
The DS says;
" There is a DC gain…
Other Parts Discussed in Thread: LMH6881 Dear Sir,
LMH6881 sometimes keeps Amp Power Off situation after Vcc powering up under Serial Mode (SPI Compatible) until writing Register 2 to power on.
Pin connections are as follows;
SPI pin : directly…
