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参数资料
| 型号： | T4260ILS |
| 厂商： | ATMEL CORP |
| 元件分类： | 调谐器 |
| 英文描述： | AUDIO TUNER, PDSO44 |
| 封装： | SSO-44 |
| 文件页数： | 23/30页 |
| 文件大小： | 299K |
| 代理商： | T4260ILS |
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3
T4260
4528I–AUDR–08/04
Figure 2. Block Diagram
Functional
Description
The T4260 implements an AM up-conversion reception path from the RF input signal to
the IF output signal. A VCO and an LO prescaler for AM are integrated to generate the
LO frequency to the AM mixer. The FM reception path generates the same LO
frequency from the RF input signal by a down-conversion to the IF output. The IF A/D
output is designed for digital signal processing. The IF can be chosen in the range of
10 MHz to 25 MHz. Automatic gain control (AGC) circuits are implemented to control the
preamplifier stages in the AM and FM reception paths.
For improved performance, the PLL has an integrated special 2-bit shift fractional logic
with spurious suppression that enables fast frequency changes in AM and FM mode by
a low step frequency (f
PDF). In addition, two programmable DACs (Digital to Analog
Converter) support the alignment via a microcontroller.
For a double-tuner concept, external voltage can be applied at the input of the DACs,
the internal PLL can switched off and the OSC buffer (output) can also be used as input.
Several register bits (bit 0 to bit 145) are used to control the circuit’s operation and to
adapt certain circuit parameters to the specific application. The control bits are orga-
nized in four 8-bit, four 16-bit and three 24-bit registers that can be programmed by the
3-wire bus protocol. The bus protocol and the bit-to-register mapping is described in the
section “3-wire Bus Description” on page 9. The meaning of the control bits is mentioned
in the following sections.
AGC
PLL
SUPPLY
AGC
DIV
N DIV
R DIV
PD
RF/IF
SUPPLY
BUS
VCO
FMAGCO
GNDRF
MXAMIB
MXAMIA
MXFMIB
MXFMIA
AMAGCO
AM
FM
43
MXFMOB
MXAMOB
MXAMOA
IFREF
IFINAM
ININFM
IFOUTB
IFOUTA
IFAGCFM
IFAGCA1
VST
VRT
GNDT
VSPLL
VRPLL
GNDPLL
EN
CLK
DATA
SW1
SW2/AGC
VTUNE
AMLF
FMLF
REFFREQ
OSCGND
OSCE
OSCB
OSCBUF
RFAGCA2
RFAGCFM
RFAGCA1
VRVCO
DAC1
DAC2
IFAGCA2
SW-AMLF
MXFMOA
44
39
40
34
35
36
29 30
31 10
32
41
37
38
14
15
26
28
23
24
25
11
13
2
1
16
17
18
22
21 20 19
27
4
5
6
7
8
42
33
12
9
3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| T4260-ILSH | 功能描述:射频无线杂项 COM.RADIO-AM/FM FE DIG.CONCEPT RoHS:否 制造商:Texas Instruments 工作频率:112 kHz to 205 kHz 电源电压-最大:3.6 V 电源电压-最小:3 V 电源电流:8 mA 最大功率耗散: 工作温度范围:- 40 C to + 110 C 封装 / 箱体:VQFN-48 封装:Reel |
| T428P107M028AH | 功能描述:钽质电容器-固体SMD RoHS:否 制造商:AVX 电容:100 uF 电压额定值:20 V ESR: 容差:10 % 外壳代码 - in:2917 外壳代码 - mm:7343 高度:4.1 mm 制造商库存号:E Case 工作温度范围:- 55 C to + 125 C 系列:TBM 产品:Tantalum Solid Low ESR Commercial Grade 封装:Bulk |
| T428P156M050AH | 功能描述:钽质电容器-固体SMD RoHS:否 制造商:AVX 电容:100 uF 电压额定值:20 V ESR: 容差:10 % 外壳代码 - in:2917 外壳代码 - mm:7343 高度:4.1 mm 制造商库存号:E Case 工作温度范围:- 55 C to + 125 C 系列:TBM 产品:Tantalum Solid Low ESR Commercial Grade 封装:Bulk |
| T428P156M050AH6110 | 功能描述:钽质电容器-固体SMD 50volts 15uF 20% RoHS:否 制造商:AVX 电容:100 uF 电压额定值:20 V ESR: 容差:10 % 外壳代码 - in:2917 外壳代码 - mm:7343 高度:4.1 mm 制造商库存号:E Case 工作温度范围:- 55 C to + 125 C 系列:TBM 产品:Tantalum Solid Low ESR Commercial Grade 封装:Bulk |
| T428P156M050AHT500 | 制造商:KEMET Corporation 功能描述:CAP TANT 15UF 50V 20% 2824 |
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