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PDF TA1296FN Data sheet ( Hoja de datos )
| Número de pieza | TA1296FN | |
| Descripción | Down-Converter IC | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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Preliminary TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA1296FN
TA1296FN
Down-Converter IC with PLL for Satellite Tuner
The TA1296FN is a wideband down-converter which can
operate at input frequency ranging from 850 MHz to 2200 MHz.
Intended primarily for use in satellite tuners, this IC includes an
oscillator, a mixer, an IF amplifier and a PLL.
The I2C bus data format is used as the data control format.
The supply voltage of 5.0 V helps minimize the tuner’s power
www.DataSheetd4iUs.sciopmation, while the compact 30-pin SSOP package allows the
tuner to be kept small.
Features
· Supply voltage: 5.0 V (typ.)
· Wide input frequency range
· Low phase noise oscillator
Weight: 0.17 g (typ.)
· Standard I2C bus format control
· 4-MHz (X’tal) buffer output pin
· Reference oscillator input change-over switch [X’tal or external input]
· 33-V high-voltage tuning amplifier built-in
· 3-bit input port (for read mode)
· 2-bit band switch drive transistor (for write mode)
· 5-level AD converter
· Frequency step: 62.5 kHz or 125 kHz (for 4-MHz X’tal)
· 4-address setting via address selector
· Power-on reset circuit
· ×1/2 prescaler
· Flat compact package: SSOP30-P-300-0.65 (0.65-mm pitch)
Power-On Reset Operation Conditions
· Frequency step: 125 kHz
· Charge pump output current: ±50 mA
· Counter data: all [0]
· Band driver: OFF
· Tuning amplifier: OFF
Note 1: This device can easily be damaged by high voltages or electrical fields. For this reason, please handle it
with care.
1 2002-02-12
1 page  
Pin No.
Pin Name
Function
18 Band 1 Output
19 Band 2 Output
Output can be controlled by setting
band switch data.
20
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GND4
Ground pin for IF amplifier circuit
block
21 IF Output
IF output pin
TA1296FN
VCC2
Interface
18, 19
GND3
¾
VCC3
21
22 VCC3
23 GND5
24 XO Switch
25 ADR Set
26 GND6
Power supply pin for IF amplifier
circuit block
Ground pin for IF amplifier circuit
block
Determines reference signal input.
If connected to ground:
X’tal oscillator.
If open or connected to VCC2:
external input
VCC2
GND4
¾
¾
1 kW
24
GND3
VCC2
The address for hardware bit setting
can be selected by applying voltage to
this pin.
4 programmable address can be
programmed.
100 W 1 kW
25
Ground pin for mixer circuit block
GND3
¾
5 2002-02-12
5 Page 
TA1296FN
Test Conditions
(1) Conversion gain
RF input level = -40dBmW
(2) Noise figure
NF meter direct-reading value (DSB measurement)
(3) IF output power level
Measure maximum IF output level.
(4)
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3rd inter modulation
· fd (fd input level = -40dBmW) · fud = fd + 5 MHz (fud input level = -40dBmW)
Calculate IF output intercept point as follows:
IP3 = S/(N - 1) + P [dBmW]
S: suppression level N: 3 P: IF output level
(5) Conversion gain shift
Conversion gain shift is defined as change in conversion gain when supply voltage exceeds ranges
VCC = 5 V to 4.5 V or VCC = 5 V to 5.5 V.
(6) Frequency shift (PLL OFF)
Frequency shift is defined as change in oscillator frequency when supply voltage exceeds ranges
VCC1 = 5 V to 4.5 V or VCC1 = 5 V to 5.5 V.
(7) Phase noise (offset = 10 kHz)
Measure phase noise at 10-kHz offset.
(8) RF pin local-leak level
Measure worst-case local-leak level for RF pin (with IF output pin open).
(9) IF pin local-leak level
Measure worst-case local-leak level for IF pin (with RF input pins shorted using 50-W resistor).
11 2002-02-12
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet TA1296FN.PDF ] | |
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