Preliminary Information

MT8843

5-33

† Electrical characteristics are over recommended operating conditions, unless otherwise stated.

‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.

*Notes

1. Both mark and space have the same amplitude.

2. Band limited random noise (200-3400Hz). Present when FSK signal is present. Note that the BT band is 300-3400Hz, the Bellcore

band is 200-3200Hz.

† AC Electrical Characteristics are over recommended operating conditions, unless otherwise stated.

‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.

a. dBV = decibels above or below a reference voltage of 1Vrms.

b. dBm = decibels above or below a reference power of 1mW into 600 ohms. 0dBm = 0.7746Vrms.

Characteristics

Sym

Min

Max

Units

Test Conditions

1

Input Leakage Current

1

2

Input Resistance

10

M

Ω

3

Input Offset Voltage

25

mV

4

Power Supply Rejection Ratio

PSRR

40

dB

5

Common Mode Rejection

CMRR

40

dB

6

DC Open Loop Voltage Gain

32

dB

7

Unity Gain Bandwidth

0.3

MHz

8

Output Voltage Swing

0.5

Load

≥ 50kΩ

9

Maximum Capacitive Load (GS)

100

pF

10 Maximum Resistive Load (GS)

50

k

Ω

11

Common Mode Range Voltage

1.0

V

Characteristics

Sym

Min

Max

Units

Notes*

1

Input Detection Level

-40

-37.78

10.0

-8

-5.78

398.1

mVrms

1

2

Transmission Rate

1188

1200

1212

baud

3

Input Frequency Detection

Bell 202 1 (Mark)

Bell 202 0 (Space)

CCITT V.23 1 (Mark)

CCITT V.23 0 (Space)

1188

2178

1280.5

2068.5

1200

2200

1300

2100

1212

2222

1319.5

2131.5

Hz

Hz

Hz

Hz

4

Input Noise Tolerance

20

dB

1,2