MT88E41AE 参数 Datasheet PDF下载

Data Sheet

2.0

Applications

MT88E41

The circuit shown in Figure 6 illustrates the use of the MT88E41 device in a typical FSK receiver system. Bellcore

Special Report SR-TSV-002476 specifies that the FSK receiver should be able to receive FSK signal levels as

follows:

Received Signal Level at 1200Hz:

-32dBm to -12dBm

Received Signal Level at 2200Hz:

-36dBm to -12dBm

This condition can be attained by choosing suitable values of R1 and R2. The MT88E41 configured in a unity gain

mode as shown in Fig. 6 meets the above level requirements.

For applications requiring detection of lower FSK signal level, the input op amp may be configured to provide

adequate gain.

VDD

C1

R1

IN +

IN -

GS

R2

VRef

CAP

C2

Notes:

R1, R2 = 100 kΩ 1%

R3, R4 = 100 kΩ 10%

C1, C2, C3 = 0.1µF 20%

X-tal = 3.579545 MHz

X-tal

MT88E41

VDD

IC2

IC1

PWDN

CD

DR

DATA

DCLK

To

Controller

R3

C3

R4

OSC1

OSC2

VSS

Figure 6 - Application Circuit (Single-Ended Input)

SEMICMF.019

7