TL441AM

LOGARITHMIC AMPLIFIER

SLFS038 – JUNE 1976 – REVISED FEBRUARY 1989

3

POST OFFICE BOX 655303

PARAMETER

TEST

FIGURE

MIN

TYP

MAX

UNIT

Differential output offset voltage

1

± 25

± 70

mV

Quiescent output voltage

2

5.45

5.6

5.85

V

DC scale factor (differential output), each 3-dB stage, – 35 dBV to – 5 dBV

3

7

8

11

mV/dB

AC scale factor (differential output)

8

mV/dB

DC error at – 20 dBV (midpoint of – 35 dBV to – 5 dBV range)

3

1

2.6

dB

Input impedance

500

Ω

Output impedance

200

Ω

Rise time, 10% to 90% points, CL = 24 pF

4

20

35

ns

Supply current from VCC+

2

14.5

18.5

23

mA

Supply current from VCC –

2

– 6

– 8.5

– 10.5

mA

Power dissipation

2

123

162

201

mW

noted)

PARAMETER

TEST

FIGURE

MIN

MAX

UNIT

Differential output offset voltage

1

± 100

mV

Quiescent output voltage

2

5.3

5.85

V

DC scale factor (differential output) each 30-dB stage, – 35 dBV to – 5 dBV

3

7

11

mV/dB

DC error at

20 dBV (midpoint of

35 dBV to

5 dBV range)

TA = – 55°C

3

4

dB

DC error at – 20 dBV (midpoint of – 35 dBV to – 5 dBV range)

TA = 125°C

3

3

dB

Supply current from VCC+

2

10

31

mA

Supply current from VCC –

2

– 4.5

– 15

mA

Power dissipation

2

87

276

mW

PARAMETER MEASUREMENT INFORMATION

Figure 1

VCC+

VCC–

CA2 CA2

′ VCC + VCC –

Y

Y

Z

Z

DVM

CB2 CB2

′ GND

A1

A2

B1

B2

Figure 2

CA2 CA2

′ VCC+ VCC–

Y

Y

Z

Z

CB2 CB2

′ GND

A1

A2

B1

B2

VCC+

VCC–

ICC +

ICC –

VO