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KT0911 Datasheet PDF - KTMicro


Monolithic Digital AM/FM Receiver

Numéro de référence KT0911
Description Monolithic Digital AM/FM Receiver
Fabricant KTMicro 
Logo KTMicro Logo 
avant-première
1 Page
		
KT0911 Datasheet
KT0911 Fiche technique
1. Electrical Specification
Table 1: Operation Condition
Parameter
Symbol
Operating Condition Min Typ Max Units
Power Supply
AVDD
Relative to AVss
2.2 3.3 3.6 V
Ambient Temperature Ta
-30 25 70
Parameter
Current
Consumption
Standby Current
FM Mode
AM Mode
Table 2: DC Characteristics
Symbol
IFM
IAM
IAPD
Test/Operating
Condition
Min
-
Typ Max Units
21.3 - mA
22 mA
14.5 μA
Table 3: FM Receiver Characteristics
(Unless otherwise noted Ta = -30~70 , VDD= 2.2V to 3.6V)
Parameter
FM Frequency Range
Sensitivity1,2,3
Input referred 3rd Order
Intermodulation Production4,5
Adjacent Channel Selectivity
Symbol Test/Operating
Condition
Min
Typ Max
Frx 32 110
Sen (S+N)/N=26dB
1.6 2
IIP3 85
±200KHz
35
51
Alternate Channel Selectivity
±400KHz
50
70
Image Rejection Radio
AM suppression
RCLK frequency
RCLK frequency Range8
35
50
- 32.768 -
-100 100
Audio Output Voltage1,2,3,4
Audio Band Limits1,2,4
32ohm load
±3dB
90 100 110
30 15K
Audio Stereo Separation 1,4,6
Audio Mono S/N1,2,3,4
Audio Stereo S/N1,4,6,7
Audio THD1,2,4,6
DBLND=1
35
55 60
64
0.3
De-emphasis Time Constant
DE=0
DE=1
75
50
Audio Common Mode Voltage
Audio Output Load Resistance
Power-up Time
RL
Single-ended
0.85
32
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
Copyright ©2010, KT Micro, Inc.
3
KT0911 pdf
3. Function Description
3.1. Overview
KT0911 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 a wide band from 500KHz to 1710KHz
also known as the popular MW bands. 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 2KHz, 4KHz or 6KHz to suit various requirements by setting
register AM_BW<1:0>.
The AM receiver in KT0911 can provide accurate and automatic AM tuning without
manual alignment. It supports 350uH ferrite loop antenna with +/- 25% tolerance.
3.4. Operation Bands
KT0911 supports wide FM bands and MW bands. The FM receiver covers frequencies
from 32MHz to 110MHz and groups them into 3 bands, namely, FM1(86 to 109MHz),
FM2(64MHz to 91MHz) and FM3(32MHz to 64MHz). The FM2 and FM3 band can be
disabled by setting register FM_BAND_NUM<1:0> to 10 or 01. Furthermore, if
FM_BAND_NUM<1:0> is set to 01, the frequency range of the remaining FM band is
determined by register BAND<1:0>. KT0911 supports 3 different channel steps for FM
band, 50KHz, 100KHz and 200KHz, which are specified in register FMSPACE<1:0>.
The MW band is from 500KHz to 1710KHz if the channel step is set to 1KHz or 10KHz
and is from 504KHz to 1710KHz if the channel step is set to 9KHz. The channel step of
MW band is set by register AMSPACE<1:0>.
Copyright ©2010, KT Micro, Inc.
6





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