|
|
PDF TB2118F Data sheet ( Hoja de datos )
| Número de pieza | TB2118F | |
| Descripción | High Speed PLL For DTS | |
| Fabricantes | Toshiba | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de TB2118F (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
TOSHIBA Bi−CMOS Integrated Circuit Silicon Monolithic
TB2118F
High Speed PLL For DTS
TB2118F
TB2118F is a high−speed phase−locked loop (PLL) LSI for car
audio tuners with a built−in charge pump circuit. All functions
are controlled through serial bus lines. The device is used to
configure high−performance digital tuning systems.
Features
· Built−in high−speed program divider with built−in prescalers.
FM: 30~150MHz (pulse swallowing method)
AM: 1~40MHz (pulse swallowing method)
Weight: 0.31g (typ.)
· Phase comparator outputs are constant current output for both FM and AM. Current values can be switched
using serial data. In high−speed mode for large current output seek, the lockup time between FM band edges
can be set to approx. 500µs by selecting an appropriate VT range and low−pass filter constant.
· RDS supported
N−value data and charge pump output current data (total of 18−bits) can be selected using two resisters.
· Built−in low−pass filter op−amps for FM and AM.
· Built−in 20−bit binary counter for counting IF frequency.
· Crystal oscillator can be used 10.25MHz or 10.35MHz.
· Two output ports (open−collector output) and two I / O ports (CMOS) supported.
· Package is SSOP 24 pin.
(Note) Pins 1 and 24 are susceptible to surge. Take care when handling.
1 2002-10-30
1 page  
Pin Function
Pin
No.
Symbol
Pin Name
20
AM CP
AM charge
pump output
18
FM CP
FM charge
pump output
Function And Operation
Charge pump output for AM
・Serial data input:
When AM / FM = "1" error output
from the phase comparator is output
as constant current.
fREF > fSIG: (-) current output
fREF = fSIG: High impedance
fREF < fSIG: (+) current output
・Serial data:
Output current can be switched using
CR0 and CR1 bits.
・Normally (when using AM op-amp), set
the OP SEL bit to "1".
Charge pump output for FM
・Serial data input:
When AM / FM = "0" error output
from the phase comparator is output
as constant current.
fREF > fSIG: (-) current output
fREF = fSIG: High impedance
fREF < fSIG: (+) current output
・Serial data:
Output current can be switched using
CR0 and CR1 bits.
・Normally (when using FM op-amp), set
the OP SEL bit to "0".
TB2118F
Remarks
VDD
Inverter amp
19
5 2002-10-30
5 Page 
TB2118F
4. Control of phase comparator and charge pumps
The phase comparator compares the phase difference between the reference frequency signal (fREF) and the
programmable counter divisor output (fSIG) and outputs the result.
The constant current driver block outputs phase error signals as a current.
1) Setting charge pumps and op-amps (OPSEL)
The OPSEL bit is used to select a charge pump and an op-amp.
OPSEL
0
1
Charge Pump (CP) Output
DOFM
DOAM
2) Setting current value (CRO)
● AM / FM = "1" (AMIN input)
CR1 CR0
AM CP Out Output Current
00
01
±0.3mA
±0.5mA
Op-Amp
FM amp
AM amp
AM CP Output
FM CP Output
Hz DO
DO Hz
Hz = high impedance
DO = tri-state output
● AM / FM = "0" (FMIN input)
CR1 CR0
FM CP Out Output Current
00
10
±250µA
±5mA
3) Connection example (the filter circuit is an example for reference. Check and design depending on the desired
characteristics for your set.)
AM
CP OUT
20
100 pF
0.47 µF 15 kΩ
VT 19
0.047 µF 3.3 kΩ
FM
CP OUT
18
8200 pF
VT
11 2002-10-30
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet TB2118F.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TB2118F | High Speed PLL For DTS | Toshiba |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |