TDA8780M Datasheet, PDF (8/16 Pages) NXP Semiconductors – True logarithmic amplifier

Philips Semiconductors
True logarithmic amplifier
Product specification
TDA8780M
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Vout
(mV)
800
MLD209
600
Rg = 0
Rg = 3.3 kΩ
400
Rg = ∞
200
0
80
60
40
20
0
20
Vin (dBm, 50 Ω)
V_CC = 5 V; V_ref = 2.5 V; f_in = 10 MHz; T_amb = 25 °C.
Fig.3 Output voltage dependence on R_g.
handbo¹o⁰k,⁰h⁰alfpage
Vout
(mV)
800
MGC118
600
400
200
0
80
60
40
20
0
20
Vin (dBm, 50 Ω)
Fig.4 Typical transfer characteristics.
handboo¹k,⁰h⁰alfpage
Vout
(mV)
75
MGC666
50
Rg = 0 Rg = 3.3 kΩ
25
Rg = ∞
0
0
50
100
Vin (µV)
Fig.5 Typical small signal gain.
1995 Jul 25
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