AK2401 Datasheet, PDF (25/103 Pages) Asahi Kasei Microsystems – Direct Conversion Transceiver

[AK2401]
13. Functional Descriptions
13.1. Power Management
Power management of the AK2401 is controlled by the RX_PDN and the TX_PDN pins and <Address
0x2E> power down register. Figure 13 shows 11 blocks that are controlled by these settings.
LNAIN
LNACONT
RFOUT_P
RFOUT_N
BIAS1
BIAS2
VREF2
VREF1
TEST2
MIXER [2] PGA
AAF
LNA
[3]
I⁺
24-bit
I^{- ΔΣ ADC}
[1]
Q⁺
24-bit
Q^{- ΔΣ ADC}
AGC
DRIVER AMP
+90
0
(LNA & PGA)
LOCAL
[9]
[8] ^DIVIDER
FRACTIONAL-N
PLL SYNTHESIZER
1/4
1/(1,2,4,8)
[11]
ΔΣ
MODULATOR
R COUNTER
VREF
[10]
LDO
[7]
LOCAL
BUFFER
N DIVIDER
[6]
PHASE
FREQUENCY
DETECTOR
CHARGE
PUMP
[5] CLOCK
BUFFER
DIGITAL FILTER
DC OFFSET
CAL
DC OFFSET
CAL
ADC
P/S
IF
AD_SDO
AD_SCL
AD_FS
RSSI
DAC
S/P
IF
DA_SDI
DA_SCLK
12-bit
DAC
DA_FS
[4]
SMF
DIGITAL CONTROL
SMFOUT
TEST1
Figure 13. Power Management Block
No.
Management Blocks
[1]
LNA
[2]
MIXER, PGA, AAF
[3]
ADC, DIGITAL FILTER, RSSI, AGC, ADC P/S IF
[4]
DAC S/P IF, DAC, SMF
[5]
CLOCK BUFFER
[6]
PLL SYNTHESIZER
[7]
LOCAL BUFFER
[8]
LOCAL DIVIDER
[9]
DRIVER AMP
[10]
LDO
[11]
VREF
017003093-E-00
25
2017/3