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PDF KT0913 Data sheet ( Hoja de datos )
| Número de pieza | KT0913 | |
| Descripción | Monolithic Digital AM/FM Receiver | |
| Fabricantes | KTMicro | |
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Hay una vista previa y un enlace de descarga de KT0913 (archivo pdf) en la parte inferior de esta página. Total 27 Páginas | ||
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Monolithic Digital AM/FM Receiver
Radio-on-a-Chip™
KT0913
Features
Worldwide full band FM/AM support
FM: 32MHz-110MHz
AM: 500KHz-1710KHz
Fully integrated frequency synthesizer with no external
components
High Sensitivity
1.6uVEMF for FM
16uVEMF for AM
High Fidelity
SNR (FM/AM): 60dB/55dB
THD: 0.3%
Low Supply Current
22mA (operating)
<15uA (standby)
Advanced features
Automatic antenna tuning
Adjustable AM channel filters (2/4/6KHz)
Automatic Frequency Control (AFC)
Automatic Gain Control (AGC)
Embedded FM SNR meter
Fast seek/Tune
Integrated stereo headphone driver
I2C control interface for MCU
Special Features:
Support traditional dial and digital key for
frequency tuning and volume control
Memorize channel and volume in standby mode
Low supply voltage: 2.1V to 3.6V, can be supplied by 2
AAA batteries
Support both 32.768KHz and 38KHz crystal
Support continuous reference frequency from 32.768KHz
to 26MHz
Small form factor SSOP16L package
RoHS Compliant
Applications
Desktop and portable radio, mini/portable audio systems,
clock radio, campus radio, PMP docking station, car audio
system, toy and gift.
Rev. 1.2
Information furnished by KT Micro is believed to be accurate and reliable.
However, no responsibility is assumed by KT Micro for its use, nor for any
infringements of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patent or patent
rights of KT Micro, Inc.
FMAGC
FMINP
FMLNA
FM Mixer
ADC
VCO
LO syntehsizer
ADC
DAC
Clas
sAB
DAC
Clas
sAB
LOUT
ROUT
AMINP
AMINN
AM LNA
AMAGC
VCO
AM Mixer
SysPLL
XTAL
Control Interface
Reg bank
KT0913 System Diagram
Description
The KT0913 is a fully integrated digital AM/FM radio
receiver chip with patented technologies that offer full band
AM/FM functionality, high quality audio performance,
simple design and low BOM cost thanks to the minimum
external components required and direct frequency and
volume control interface without requiring customers to
modify existing exterior module.
Thanks to the patented tuning technology, the receiver
maintains good signal reception even with short antennas.
The chip consumes merely 22mA current and can be
powered by 2 AAA batteries. Another useful feature is that
the volume and channel information can be preserved in
standby mode without external memories. KT0913
supports a wide range of reference clocks from 32.768KHz
to 26MHz, hence can share system clocks with a varieties
of MCUs further reducing the system BOM cost.
With high audio performance, fully integrated features and
low BOM cost, KT0913 is ideal for various applications
and products.
KT Micro, Inc.
22391 Gilberto, Suite D
Rancho Santa Margarita, CA 92688
Tel: 949.713.4000
Fax: 949.713.4004 Copyright ©2010, KT Micro, Inc.
www.aitendo.com
1 page  
Table 4: AM Receiver Characteristics
(Unless otherwise noted Ta = -30~70℃, AVDD= 2.1V to 3.6V)
Parameter
AM Frequency Range
Sensitivity1,2
Symbol
Frx
Sen
Test/Operating
Condition
(S+N)/N=26dB
Min Typ
500
15
Audio Output Voltage1,2,3,4
32ohm load
Audio Mono S/N1,2,3,4
Audio THD1,2,4,6
Antenna inductance
L
Notes:
1. FMOD=1KHz
2. Modulation index is 30%
3. VEMF=1mV, Frequency=500KHz~1710KHz
4. VOLUME<4:0>=11111
60
55
0.3
280 350
Max
1710
0.6
420
Units
KHz
uVemf
mVRMS
dB
%
uH
Copyright ©2010, KT Micro, Inc.
5
5 Page 
Each time VOLP/VOLM key is pressed, the volume increases/decreases by 2dB. If the
VOLP/VOLM key is pressed and held, the volume will continue to increase/decrease at
2dB steps until the key is released.
When configured in Key Mode, KT0913’s channel selection has two working modes.
Mode A:
If KEY_MODE<1:0> is set to 00, Mode A is selected. In this mode, each time the CHP
(CHM) is pressed, the channel frequency increases (decreases) by one step. The step
sizes are defined by FMSPACE<1:0> and AMSPACE<1:0>. If the CHP (CHM) key is
pressed for and held for a certain time (defined by TIME1<1:0>), the channel frequency
will continue to increase (decrease) automatically at a certain pace (as defined by
TIME2<2:0>) until the key is released.
Mode B:
If KEY_MODE<1:0> is set to 01, Mode B is selected. In this mode, each time the CHP
(CHM) is pressed, the channel increases (decreases) by one step. The step sizes are
defined by FMSPACE<1:0> and AMSPACE<1:0>. If the CHP (CHM) key is pressed
and held for a specific time (TIME1<1:0>), the channel will continue to increase
(decrease) automatically at a certain pace (TIME2<2:0>) even if the key is released. The
movement is stopped when the key is pressed again.
3.8.3. Dial Mode
KT0913 supports a unique Dial Mode whose application circuit is shown in Figure 3.
The dial is implemented by a variable resistor with the center tap connected to the chip.
KT0913 measures the divider ratio of two parts of the variable resistor and maps the
result to the real control parameters, such as channel frequency, volume, etc.
The channel controller enters dial mode by setting register GPIO1<1:0> to 10. The
illustration circuit is shown in Figure 3 错误！未找到引用源。. If the center-tap of the
variable resistor is located in the write area, the tuned channel could be expressed as:
ftune
=
X
X +Y
( ftop
−
fbot
+ 2 × N guard
×
fstep ) −
N guard
×
f step
+
f bot
Where fstep is the channel step, ftop and fbot are the upper and lower bound of the band,
as described in section 3.8.1. Nguard is the number of guard channel in channel step to
prevent mechanical limit of the wheels, which is configured by register
USER_GUARD<8:0>. When the center tap goes in the shaded guard area, the tuned
channel stays at the upper or lower bound of band.
Copyright ©2010, KT Micro, Inc.
11
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| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet KT0913.PDF ] | |
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