TDA8050 查看數據表（PDF） - Philips Electronics

零件编号

产品描述 (功能)

比赛名单

TDA8050

QPSK transmitter

Philips Electronics 

Philips Semiconductors

QPSK transmitter

Product specification

TDA8050

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP. MAX. UNIT

Serial control clock

fclk

tsu

th(CLK)

td(strt)

td(stp)

clock frequency

input data to CLK set-up time

input data to CLK hold time

delay to rising clock edge

delay from last clock edge

see Fig.3

see Fig.3

see Fig.3

see Fig.3

−

330 −

kHz

−

2

−

µs

−

1

−

µs

−

3

−

µs

−

3

−

µs

Notes

1. All specification points of the output section and the overall circuit are measured after the 2 : 1 transformer

(siemens V944) connected with a load of 75 Ω.

2. Overall phase noise converter: Icp = 0.36 mA; fref = 12.5 kHz; VI(diff) = 100 mV; VO(diff) = 100 mV; VO = 55 dBmV;

DAC = 28; fi = 26.5 MHz.

3. Crystal oscillator; the crystal oscillator uses a 4, 2 or 1 MHz crystal in series with a capacitor. The crystal is serial

resonant with load a capacitance of 18 to 20 pF. The connection to VCC is preferred but can also be to GND.

Notes to the characteristics

handbook, full pagewidth

IF_FILT

imbalance

LO(sup)

FCE183

measure 2 fi(Q)

measure 1 fi(I)

frequency

The amplitude imbalance and the LO suppression are measured in the spectrum of the signal measured at the output IF_FILT and are defined in the

following conditions:

Measure 1: I input frequency = 500 kHz. I input level = 400 mV (p-p) sine wave. Unused input as 0 V differential.

Measure 2: Q input frequency = 500 kHz. Q input level = 400 mV (p-p) sine wave. Unused input as 0 V differential.

Fig.3 Imbalance and LO suppression.

1999 Dec 14

9

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