TL441EP

LOGARITHMIC AMPLIFIER

SGLS268 − OCTOBER 2004

4

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

ELECTRICAL CHARACTERISTICS OVER OPERATING FREE-AIR TEMPERATURE RANGE,

VCC± = ±6 V (unless otherwise noted)

PARAMETER

TEST FIGURE

MIN

MAX

UNIT

Differential output offset voltage

1

±125

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

6

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

PD = VCC+ • ICC+ + VCC− • ICC−