lna
DESCRIPTION
Default Phonon Front End (No change in active components from Rev A). LNA. PGA. A v @ 100. A v =1..7. V zap. AD797. Squid. Phonon. LT6910. Squid Bias. 3. Gain Sel. A vdc @4. PGA. A v =1..7. LT6910. 3. Squid FB. Gain Sel. FB Synthesizer. AD8130. Option: Use LMP8100. LNA. - PowerPoint PPT PresentationTRANSCRIPT
LNAPGA
GainSel
Vzap
Squid FB
Squid Bias
SquidPhonon
3
PGA
GainSel
3
FB Synthesizer
Default Phonon Front End (No change in active components from Rev A)
Av100Av
AvAvdc
AD8130
LT6910
LT6910
AD797
LNAPGA
GainSel
Vzap
Squid FB
Squid Bias
SquidPhonon
3
PGA
SPI3
FB Synthesizer
Option: Use LMP8100
Av100Av
Av
Avdc
AD8130
LMP8100
LT6910
AD797
The good: Extended gain range, fewer control wires
The bad: Requires ±2.5V Power
LNAPGA
GainSel
Vzap
Squid FB
Squid Bias
SquidPhonon
3
VGA
VGain (24db range)1
FB Synthesizer
Av100Av
AvdbAvdc
AD8130
AD8337 VGA
LT6910
AD8337 LNA
The good: Extended gain range, small footprint, fewer chips
The bad: Higher power, marginal noise performance,
Option: Use AD8337
unknown 1/F corner, requires a DAC channel for gain setting
LNAPGA
GainSel
Vzap
Squid FB
Squid Bias
SquidPhonon
3
PGA
GainSel
2
FB Synthesizer
Option: use AD8250
Av100Av
Av
AD8250
AD8066(e.g.)
LT6910
AD797
Av
The good: Flexible topology, small footprint, fewer control wires
The bad: Limited gain range, 2 devices don’t have enough gain