T4260-ILQH Atmel, T4260-ILQH Datasheet - Page 30

• Manufacturer Part Number: T4260-ILQH
• Description: IC AM/FM FRONT END W/PLL 44SSOP
• Manufacturer: Atmel

Specifications of T4260-ILQH

• Frequency: AM, FM
• Modulation Or Protocol: AM, FM
• Applications: AM/FM Radio Receiver
• Current - Receiving: 85mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 8 V ~ 10 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -

30
T4260
Figure 11-4. External Voltage at AMLF (Pin 17)
The maximum input voltage at the AMLF input (pin 17) depends on the applied supply voltage
as well as on the gain and offset settings. To avoid any damages during the product’s lifetime,
the following formulas regarding SWAMLF voltage, gain and offset settings have to be observed
(see
V
(R
This means when having a gain factor of 2 and an offset value of 1V, the applied SWAMLF volt-
age should be limited to a voltage lower than 0.83V.
SWAMLF voltage < (V
e.g.: maximum SWAMLF voltage = (10V + 3V – 1V)/(2
It is also possible to reduce the gain or offset instead (or along with) the SWAMLF voltage.
SWAMLF
1
+ R
Section 10.22 “Permitted DAC Conditions” on page
2
)/R
([R
2
= 7.25
1
+ R
2
]/R
S
2
)
+ 3V – DAC offset)/(DAC gain factor
DAC gain factor + DAC offset < V
VTUNE or DAC
R
R
1
2
T4260
Gain
T4260
AMLF
24).
7.25) = 0.83V
S
+ 3V
7.25)
4528N–AUDR–11/09