°C, unless otherwise specified)

Note: Testing of all parameters is performed at 25

°C. Characterization, as well as the design rules used

allow correlation of tested performance with actual performance at other temperatures. All pa-

rameters listed here are met in the range 0

°C to +70°C. For applications requiring operations in

the standard temperature range (0

°Cto 70°C) use L3234. If operations are required in the ex-

tended temperature range (-40

°Cto 85°C), use the L3234T.

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Fig.

STAND-BY

Output Voltage at TIP/RING

pins

35.7

39

V

Short Circuit Current

Stand-by, SBY = 1

2

3

4

mA

DC OPERATION

Output Voltage at TIP/RING

pins

35.7

35.2

39

39

V

V

Current Progr.

63

70

77

mA

Current Progr.

8.4K

20

70

mA

On-hook Threshold

5

Off-hook Threshold

10

GK Detector Threshold

10

17

Gklim

Ground Key Current

Limitation

RING to BGND

13

22

mA

Gkov

Ground Key Threshold

Overloap

Gklim-Ilgk

1

mA

Max. Output Current at

TIP/RING

90

140

mA

6.2

8

mA

Iline = 0

1.6

2.1

mA

Iline = 0

2.8

3.6

mA

AC OPERATION

Sending Output Impedance

pin 9 (Tx)

10

Ω

Receiving Input Impedance

pin 12 (Rx)

1

M

Ω

2W Return Loss

f = 300 to 3400Hz

20

36

dB

A1

Thl

Trans Hybrid Loos

f = 300 to 3400Hz

20

36

dB

A2

Sending Gain

5.82

6.02

6.22

dB

A3

Flatness

f = 300 to 3400Hz

-0.2

0.2

dB

Linearity

-20dB to 10dBm

-0.2

0.2

dB

Receiving Gain

0.2

0

0.2

dB

A4

Flatness

f = 300 to 3400Hz

-0.2

0.2

dB

Linearity

-20dBm to +4dBm

-0.2

0.2

dB

Np4W

Psoph. Noise at Tx

-69

-62

dBmp

Np2W

Psoph. Noise at Line

-75

-68

dBmp

Terminal versus Tx Terminal

f = 1020Hz

-30

-24

dB

dB

A5

versus Line Terminal versus

Tx Terminal

f = 1020Hz

-20

-14

dB

dB

L/T Conversion measured at

line Terminals

f = 300 to 3400

49

53(*)

dB

dB

A6

T/L Conversion Measured at

Line Terminals

f = 300 to 3400

46(*)

dB

A7

(*) Selected parts L3235C

L3234 - L3235

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