AK2365 Datasheet, PDF (25/31 Pages) Asahi Kasei Microsystems – dPMR Filterless IF LSI

[AK2365]
16. AGC Operation
AK2365 has two AGC circuits, AGC1 and AGC2. The signal level from IFIP pin is adjustable
automatically by AGC1/2. The following graphs show IFIP input vs. IFOUT output characteristics by
setting {AGC1_STEP}=0/1, {IFOG[1:0]}=00, {AGC_OFF}=0. Setting {AGC_OFF}=1 can disable
automatic gain adjustable operation and also enable manual gain operation by {AGC1_G[5:0]},
{AGC2_G[4:0]} registers.
IFIP level vs. IFOUT level
(VDD=3V, AGC1_STEP=0)
20
10
0
-10
-20
-30
-40
-50
-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
IFIP input level [dBm]
IFIP level vs. IFOUT level
(VDD=3V, AGC1_STEP=1)
20
10
0
-10
-20
-30
-40
-50
-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
IFIP input level [dBm]
MS1453-E-01
- 25 -
2012/10