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PDF AK2365A Data sheet ( Hoja de datos )
| Número de pieza | AK2365A | |
| Descripción | FM IF Detector | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK2365A]
AK2365A
FM IF Detector with Narrow Band Filter
1. Features
The AK2365A includes 2nd-Mixer, AGC+BPF, PLL FM detector, noise squelch, and RSSI circuit.
This device can eliminate E to J type ceramic filters, quadrature discriminator, and other external
components.
• Low operating voltage: VDD = 2.6 to 5.5 V
• Wide operating temperature: Ta = -40 to 85 C
• High sensitivity: -102dBm at 12dB SINAD *De-emphasis + BPF
• Built-in PGA and 2nd Mixer
• Local frequency: 45.9MHz, 50.4MHz, 57.6MHz (Triple of 15.3, 16.8 and 19.2MHz)
• Built-in programmable AGC+BPF circuits corresponding to E to J type ceramic filters
• Built-in PLL FM detector
• RSSI function
• Built-in noise squelch circuits
• Low consumption current: 6mA
• Compact plastic packaging: 32-pin QFNJ (4.0 x 4.0 x 0.75mm, 0.4mm pitch)
2. Applications
• Narrowband high performance professional digital wireless systems
(Channel spacing for 6.25kHz,12.5kHz)
• Digital convenience radio systems
MS1591-E-03
-1-
2015/4
1 page  
[AK2365A]
6. Pin/Function
Package
Pin No Name
1 IFIP
2 NC
3 NC
4 NC
5 NC
6 VREFA
7 AVSS
8 AVDD
9 BIAS
10 NRECTO
11 NAMPO
12 NAMPI
13 AUDIOOUT
14 DISCOUT
15 PDOUT
16 RSSIOUT
17 IFOUT
18 AVSS2
19 PDN
20 RSTN
21 CSN
22 SCLK
23 SDATA
24 DETO
25 DVDD
26 DVSS
27 VREFD
28 AVSS3
29 AGNDOUT
30 AGNDIN
31 LOCAP
32 LOIN
Signal
Type
AI
AIO
AIO
AIO
AIO
AO
PWR
PWR
AO
AI
AO
AI
AO
AO
AO
AO
AO
PWR
DI
DI
DI
DI
DB
DO
PWR
PWR
AO
PWR
AO
AI
AI
AI
Conditions
at power
down
Note 1)
Z
Z
Z
Z
Low
-
-
Z
Note 2)
Z
Z
Note 3)
Note 4)
Z
Z
Note 5)
-
Z
Z
Z
Z
Z
Z
-
-
Low
-
Low
Low
Note 6)
Note 6)
Function
IF signal input pin
NC pin
NC pin
NC pin
NC pin
LDO reference pin
Connect the capacitor to stabilize LDO reference voltage.
Analog VSS power supply pin
Analog VDD power supply pin
Output pin to connect bias resistor for reference voltage
Output pin for the rectification circuit
Output pin for noise squelch amplifier
Input pin for noise squelch amplifier
Demodulated audio signal output pin
Pin2 for Discriminator Low-pass filter
Pin1 for Discriminator Low-pass filter
Output pin to connect capacitor for Received Signal Strength
Indicator(RSSI)
Output pin for IFBUF
Analog VSS power supply pin
Power down pin for LDO
Hardware reset pin
Chip select input pin for serial data
Clock input pin for serial data
Input and output pin for serial data
Signal detect output pin
Digital VDD power supply pin.
Digital VSS power supply pin.
LDO reference pin
Connect the capacitor to stabilize LDO reference voltage.
Analog VSS power supply pin
Analog ground output pin.
Connect the capacitor to stabilize the analog ground level.
Analog ground input pin.
Connect the capacitor to stabilize the analog ground level.
Local signal input pin
Local signal input pin
Note A: Analog, D: Digital, PWR: Power, I: Input, O: Output, B: Bidirectional, Z: High-Z, L: Low
Note 1) Connecting internally to VSS pin by 50k
Note 2) Connecting internally to VDD pin by 720k
Note 3) Connecting internally to VSS pin by 830k
MS1591-E-03
-5-
2015/4
5 Page 
11. Power-up Sequence
[AK2365A]
PDN (LDO)
On-chip LDO
(1.8V operation)
RSTN
Write to the register
700s 1s
The register can be written
1.8V
Internal register values are set.
Note) After PDN is set to “High”, registers remain undefined. In order to initialize them, RSTN is
set to “High”
12. System Reset
Parameter
Hardware reset signal
input width
Software reset
Symbol
tRSTN
Condition
RSTN pin
SRST
register
Min.
1
Typ.
Max.
Unit Remarks
µs *1)
*2)
*1) After power-on, be sure to perform a hardware reset operation (register initialization). The
system is reset by a low pulse input of 1s (min.) and enters the normal operation state. At this
moment, the digital (DI) pins are set as follows: RSTN pin to High, SCLK pin to Low, SDATA pin
to Low, CSN pin to Low.
tRSTN
RSTN
VIH
VIL
*2) When data 0x04:10101010 is written to the SRST[7:0] register, software reset is performed.
This setting initializes the registers and the operation mode is set to mode 2 (Standby 2).
After software reset is completed, this register comes to “0”.
MS1591-E-03
- 11 -
2015/4
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK2365A.PDF ] | |
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