U3500BM-BFLG3 datasheet(5/17 Pages) TEMIC

Part #	U3500BM-BFLG3

Description	Cordless Telephone Signal Processor

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Manufacturer	TEMIC [TEMIC Semiconductors]

Direct Link	http://www.temic.de

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U3500BM

Preliminary Information

Rev. A3, 20-May-98

5 (17)

Parameters

Test Conditions / Pins

Symbol

Min.

Typ.

Max.

Unit

Fig.

RF demodulator

fIF = 450 kHz, fMOD = 1 kHz, VIF = 500

mVrms

BSCR

EDEE

GRX0

GRX1

GRX2

GRX3

ERX1

ERXO

ERX2

1

0

1

01

1

Recovered audio

GDEM = 0,

DfFM = 2.5 kHz

GDEM = 1,

DfFM = 5.0 kHz

0.4

0.8

1.6

Vpp

6

Recovered audio output

voltage drop

VBatt = 3.1 to 5.2 V

–1

+1

dB

6

AM rejection ratio

30% AM

30

35

dB

6

RX audio

Change of RX0 signal

deemphasis bypass

EDEE = 0

–0.5

0

0.5

dB

6

Gain adjust range

12

15

17

dB

6

Gain adjust step

0.8

1

1.2

dB

6

Output signal vs. frequency

relative to 1 kHz (0 dB)

deemphasis bypassed

100 Hz

300 Hz

1800 Hz

3200 Hz

4100 Hz

–7.5

–2.0

–1.3

–0.8

–6.5

–1.0

–0.3

0.2

–5.5

0

0.7

1.2

–60

dB

6

Output signal vs. frequency

relative to 1 kHz (0 dB)

deemphasis enable

EDEE = 1

100 Hz

300 Hz

1800 Hz

3200 Hz

4100 Hz

–0.7

3.7

–5.7

–10

0.3

4.7

–4.7

–9.0

1.3

5.7

–3.7

–8.0

–66

dB

6

Total harmonic distortion

DFM = 250 Hz

DFM = 2.50 kHz

3.5

%

6

Audio mute

DFM = 2.5 kHz, ERXO = 0

ERX1 = 0, ERX2 = 0

65

dB

6

Output impedance

100

W

Expander

EEA

GEA0

GEA1

GEA2

GEA3

GEA4

10

00

11

Gain reference level

VEXIN = –10 dBVrms

GOREC

11

13

15

dB

7

Change of gain when

expander is bypassed

BCOMP = 1

–0.5

0.5

dB

7

Gain tracking

VEXIN = –20 dBVrms

VEXIN = –30 dBVrms

VEXIN = –35 dBVrms

VEXIN = –40 dBVrms

–21

–41

–53

–50

–60

–19

–39

–47

dB

7

Input impedance

9.5

14.5

k

W

7

Gain change vs. supply

voltage

VBatt = 3.1 to 5.2 V

–0.5

0.5

dB

7

Attack time

VEXIN = step

–20 dBVrms

³ –14 dBVrms,

measure time after step, when

output voltage has 0.75 times

the final value

tf

16

ms

7

Release time

VEXIN = step

14 dBVrms

³ –20 dBVrms,

measure time after step, when

output voltage has 1.5 times of

the final value

tf

16

ms

7

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