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KT0922 の電気的特性と機能

KT0922のメーカーはKTMicroです、この部品の機能は「Monolithic Dial-tuned AM/FM Receiver」です。


製品の詳細 ( Datasheet PDF )

部品番号 KT0922
部品説明 Monolithic Dial-tuned AM/FM Receiver
メーカ KTMicro
ロゴ KTMicro ロゴ 




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KT0922 Datasheet, KT0922 PDF,ピン配置, 機能
Monolithic Dial-tuned AM/FM Receiver
Radio-on-a-Chip™
KT0922
Features
Single-chip AM/FM radio solution
Built-in MCU
Support analog mechanical tuning
Worldwide FM/AM band support
Maximum three FM bands with configurable
aitendofrequency range within 32MHz-110MHz
Configurable AM frequency range within 500KHz -
1710KHz
High Sensitivity
1.6uVEMF for FM
16uVEMF for AM
High Fidelity
SNR (FM/AM): 60dB/55dB
THD: 0.3%
Low Supply Current
25mA (operating)
<15uA (standby)
Integrated stereo indicator
Programmable sensitivity and hysteresis threshold
Integrated tuning indicator
Programmable sensitivity and hysteresis threshold
Low supply voltage
2.2V to 3.6V, can be supplied with 2 AAA batteries
Integrated low power crystal oscillator
Support 32.768KHz and 38KHz crystal
Arbitrary reference clock supported
From 30KHz to 40MHz with 1Hz step
One audio line-in channel
Small form factor SSOP20L package
RoHS Compliant
Applications
Desktop and portable radio, boom box, clock radio, MP3
speaker, campus radio and other applications with
mechanical tuning.
KT0922 System Diagram
Description
The KT0922 is KT Micro’s 2nd generation of proprietary
fully integrated AM/FM receiver chip supporting
mechanical tuning without MCU. The new features include
improved tuning feel, new ST and Tuning light signal,
improved EMI/EMC, improved FM stereo separation and
one audio line-in channel.
Thanks to its advanced architecture, KT0922 offers an
excellent user listening experience with high sensitivity,
high signal-to-noise ratio, low distortion and low sensitivity
to interference.
KT0922 provides direct and simple interface to support
mechanical tuning. A pre-programmed low cost EEPROM
can be used to configure the radio settings to differentiate
product designs and accommodate standards in various
regions. No external MCU is required.
Thanks to its high integration level and efficient user
interface design, KT0922 lowers the system cost, simplifies
design and improves product reliability and
manufacturability. KT0922 can operate with two AAA
batteries, making it ideal for low-power portable radio.
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 Beijing KT Micro, Ltd.
Beijing KT Micro, Ltd.
BeiWu New Technology Park, Building #4, 23 BeiWuCun
Road, Haidian District, Beijing, China.
Tel: +86-10-88891955 http://www.ktmicro.com.cn
Fax: +86-10-88891977
Copyright 2012, Beijing KT Micro, Ltd.
www.aitendo.com

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KT0922 pdf, ピン配列
KT0922
1. Electrical Specification
Parameter
Power Supply
aitendoAmbient Temperature
Table 1: Operation Condition
Symbol
AVDD
Operating Condition
Relative to AVSS
Min
2.1
Ta -30
Typ
3.3
25
Max Units
3.6 V
70
Table 2: DC Characteristics
Parameter
Symbol Test/Operating
Condition
Min
Typ Max Units
Current
FM Mode IFM
- 24 - mA
Consumption
AM Mode IAM
26 mA
Standby Current
IAPD
15 μA
Table 3: FM Receiver Characteristics
(Unless otherwise noted Ta = -30~70, VDD= 2.1V to 3.6V)
Parameter
FM Frequency Range
Sensitivity1,2,3
Input referred 3rd Order
Intermodulation Production4,5
Symbol Test/Operating
Condition
Min
Typ
Max
Frx 32 110
Sen (S+N)/N=26dB
1.6 2
IIP3 85
Adjacent Channel Selectivity
±200KHz
35
51
Alternate Channel Selectivity
±400KHz
50
70
Image Rejection Radio
AM suppression
RCLK frequency
RCLK frequency Range8
Audio Output Voltage1,2,3,4
32ohm load
35
50
30 32.768 40,000
-100 100
- 96 -
Audio Band Limits1,2,4
±3dB
30
15k
Audio Stereo Separation 1,4,6
Audio Mono S/N1,2,3,4
Audio Stereo S/N1,4,6,7
DBLND=1
40
55 60
64
Audio THD1,2,4,6
De-emphasis Time Constant
DE=0
0.3
75
Audio Common Mode Voltage
Audio Output Load Resistance
Seek/Tune Time
Power-up Time
RL
DE=1
Single-ended
50
0.85
32
50
600
Notes:
1. FMOD=1KHz, 75us de-emphasis
2. MONO=1
3. F=22.5KHz
4. VEMF=1mV, Frx=32MHz~110MHz
5. AGCD=1
6. F=75KHz
7. VOLUME<4:0>=11111
8. The supported RCLK frequency is not continuous. Please refer to application notes.
Units
MHz
uVemf
dBuVE
MF
dB
dB
dB
dB
KHz
ppm
mVRMS
Hz
dB
dB
dB
%
μs
μs
V
ms
ms
Copyright 2012, Beijing KT Micro, Ltd.
3


3Pages


KT0922 電子部品, 半導体
KT0922
3. Function Description
3.1. Overview
KT0922 offers a true single-chip, full-band FM/AM and versatile radio solution by
minimizing the external components and offering a variety of configurations.
3.2. FM Receiver
The FM receiver is based on the architecture of KT Micro’s latest generation FM
receiver chips in mass production. There are no external filters or frequency-tuning
devices thanks to a proprietary digital low-IF architecture consisting of a fully-
integrated LNA, an automatic gain control (AGC), a set of high-performance ADCs,
high-quality analog and digital filters, and an on-chip low-noise self-tuning VCO. The
on-chip high-fidelity Class-AB driver further eliminates the need for external audio
amplifiers and can drive stereo headphones directly.
3.3. AM Receiver
The AM Receiver employs a similar digital low IF architecture and shares many
circuits with the FM receiver. The AM receiver supports arbitrary frequency range
from 500KHz to 1710KHz. The AM channel spacing can be set to 1KHz, 9KHz or
10KHz to address applications in different regions. The bandwidth of the channel
filter can be set to 1KHz to 5KHz to suit various requirements by setting register
FLT_SEL <2:0>.
The AM receiver in KT0922 can provide accurate and automatic antenna tuning
without manual alignment within the frequency range of 500KHz to 1710KHz. It
supports ferrite loop antenna with value between 360uH and 620uH.
3.4. Softmute
There is a Soft Mute feature that is enabled by setting FM_DSFTMUTE to 0 in FM
mode and AM_DSFTMUTE to 0 in AM mode. In this mode, the audio volume is
gradually attenuated when the signal reception is bad (i.e. when the RSSI is below a
certain level as defined by FM_SFTMUTE_LOWTH<2:0> and
AM_SFTMUTE_LOWTH<2:0>, respectively.) The attenuation attack rate can be
configured through SFTMUTER<1:0>. The target volume can be configured through
FM_VOLUMET<2:0> and AM_VOLUMET<2:0>. The volume will be recovery
from FM_VOLUMET<2:0> and AM_VOLUMET<2:0> with a decay rate determined
also by SFTMUTER<1:0> once the signal quality is good enough (i.e. when the RSSI
is higher than a certain level as defined by FM_SFTMUTE_HIGHTH<2:0> and
AM_SFTMUTE_HIGTH<2:0>, respectively.) SNR value can also be used as the
judgment threshold by setting SFTMUTE_MD to 1.
Copyright 2012, Beijing KT Micro, Ltd.
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部品番号部品説明メーカ
KT0922

Monolithic Dial-tuned AM/FM Receiver

KTMicro
KTMicro


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