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PDF T4260 Data sheet ( Hoja de datos )
| Número de pieza | T4260 | |
| Descripción | AM/FM Front End IC | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de T4260 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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Features
• AM/FM Tuner Front End with Integrated PLL
• AM Up-conversion System (AM-IF: 10.7 MHz)
• FM Down-conversion System (FM-IF: 10.7 MHz)
• IF Frequencies up to 25 MHz
• Fine-tuning Steps: AM = 1 kHz and FM = 50 kHz/25 kHz/12.5 kHz
• Fast Fractional PLL (Lock Time < 1 ms) Inclusive Spurious Compensation
• Fast RF-AGC, Programmable in 1-dB Steps
• Fast IF-AGC, Programmable in 2-dB Steps
• Fast Frequency Change by 2 Programmable N-divider
• Two DACs for Automatic Tuner Alignment
• High S/N Ratio
• 3-wire Bus (Enable, Clock and Data; 3V and 5V Microcontrollers-compatible)
1. Description
The T4260 is an advanced AM/FM receiver with integrated fast PLL as a single-chip
solution based on Atmel®’s high-performance BICMOS II technology. The low-imped-
ance driver at the IF output is designed for the A/D of a digital IF. The fast tuning
concept realized in this part is based on patents held by Atmel and allows lock times
less than 1 ms for a jump over the FM band with a step width of 12.5 kHz. The AM
up-conversion and the FM down-conversion allows an economic filter concept. An
automatic tuner alignment is provided by built-in DACs for gain and offset compensa-
tion. The frequency range of the IC covers the FM broadcasting band as well as the
AM band. The low current consumption helps the designers to achieve economic
power consumption concepts and helps to keep the power dissipation in the tuner low.
www.DataSheet4U.com
AM/FM Front
End IC
T4260
4528M–AUDR–03/08
1 page  
T4260
www.DataSheet4U.com
4. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
All voltages are referred to GND
Parameters
Symbol
Value
Unit
Analog supply voltage, pins 15 and 41
Maximum power consumption
Ambient temperature range
Storage temperature range
Junction temperature
VST, VSPLL
Ptot
Tamb
Tstg
Tj
10
1.0
–40 to +85
–40 to +150
150
V
W
°C
°C
°C
5. Thermal Resistance
Parameters
Junction ambient, soldered to PCB
Symbol
RthJA
Value
52
Unit
K/W
6. Operating Range
Parameters
Symbol
Supply voltage range(1), pins 15 and 41
VST, VSPLL
Ambient temperature
Tamb
Oscillator frequency, pin 21
Rfi
Note: 1. VST and VSPLL must have the same voltage.
Min.
8
–40
60
Typ.
8.5
Max.
10
85
175
Unit
V
°C
MHz
7. Electrical Characteristics
Test conditions (unless otherwise specified): VST/VSPLL = +8.5V, Tamb = +25°C
No. Parameters
Test Conditions
Pin Symbol
Min.
Typ.
Max.
Unit Type*
1 Power Supply
1.1 Supply voltage
15,
41
VS
8 8.5 10
VC
1.2 Supply current
2 PLL Divider
AM and FM mode,
VS = 10V
15,
41
IS
70 85 110 mA A
2.1
Programmable
R-divider
14-bit register
3
16383
A
Programmable (VCO)
2.2 N-divider
(1 kHz step frequency)
2-bit × 18-bit register
switchable via bit 5
3
262143
A
2.3
Reference oscillator
input voltage
f = 0.1 MHz to 3 MHz
27
100
mVrms
B
2.4 Reference frequency
FM
AM
120 150 10000 kHz
120 2850 10000 kHz
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note: 1. Minimum and maximum limits are characterized for entire temperature range (–40°C to +85°C) but are tested at +25°C
4528M–AUDR–03/08
5
5 Page 
Figure 8-2. 3-wire Bus Timing Diagram
tF
Enable
tS
tR
Data
Clock
tHDA
tS
tR
tH tL
T4260
www.DataSheet4U.com
tR
tHEN
tF
VHigh
VLow
VHigh
VLow
tF
VHigh
VLow
4528M–AUDR–03/08
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet T4260.PDF ] | |
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