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6
Am79M574 Data Sheet
ELECTRICAL CHARACTERISTICS
Description
Test Conditions (See Note 1)
Min
Typ
Max
Unit
Note
Analog (VTX) output impedance
3
Ω
Analog (VTX) output offset
0
°C to +70°C
–1*
–40
°C to +85°C
–1
–35
–30
–40
–35
+35
+30
+40
+35
mV
—
—
4
4
Analog (RSN) input impedance
Longitudinal impedance at A or B
300 Hz to 3.4 kHz
1
20
35
Ω
4
—
Overload level
Z2WIN = 600 Ω to 900 Ω
4-wire
2-wire
–3.1
–6.0
+3.1
+6.0
Vpk
—
2
Transmission Performance, 2-Wire Impedance
2-wire return loss
(See Test Circuit D)
300 Hz to 500 Hz
500 Hz to 2500 Hz
2500 Hz to 3400 Hz
26
26
20
dB
4, 14
Longitudinal Balance (2-Wire and 4-Wire, See Test Circuit C)
RL = 600 Ω, longitudinal to
metallic L-T, L-4 (normalized to
unity gain)
300 Hz to 3400 Hz
–1*
48
52
dB
Longitudinal to metallic L-T, L-4
200 Hz to 1 kHz
normal polarity
0
°C to +70°C
–2*
normal polarity –40
°C to +85°C
–2
reverse polarity
–2
63
58
54
—
—
4
—
1 kHz to 3.4 kHz
normal polarity
0
°C to +70°C
–2*
normal polarity –40
°C to +85°C
–2
reverse polarity
–2
58
54
54
—
—
4
—
Longitudinal signal
generation 4-L
300 Hz to 800 Hz
300 Hz to 800 Hz
–1*
40
42
Longitudinal current capability
per wire
Active state
OHT state
25
18
mArms
4
Insertion Loss (2- to 4-Wire and 4- to 2-Wire, See Test Circuits A and B)
Gain accuracy 2- to 4-wire
2- to 4-wire
2- to 4-wire
2- to 4-wire
4- to 2-wire
4- to 2-wire
4- to 2-wire
4- to 2-wire
0 dBm, 1 kHz,
0
°C to +70°C
0 dBm, 1 kHz, –40
°C to +85°C
0 dBm, 1 kHz,
0
°C to +70°C
–1*
0 dBm, 1 kHz, –40
°C to +85°C
–1
5.75
5.65
5.75
5.70
5.85
5.85
5.85
5.85
6.00
6.05
5.95
6.00
dB
—
4
—
4
0 dBm, 1 kHz,
0
°C to +70°C
0 dBm, 1 kHz, –40
°C to +85°C
0 dBm, 1 kHz,
0
°C to +70°C
–1*
0 dBm, 1 kHz, –40
°C to +85°C
–1
–0.15
–0.20
–0.1
–0.15
+0.15
+0.20
+0.1
+0.15
—
4
—
4
Variation with frequency
300 Hz to 3400 Hz
Relative to 1 kHz
0
°C to +70°C
–40
°C to +85°C
–0.1
–0.15
+0.1
+0.15
—
—
—
4
Gain tracking
+7 dBm to –55 dBm, ref 0 dBm
0
°C to +70°C
–40
°C to +85°C
–0.1
–0.15
+0.1
+0.15
—
4
4
Notes:
* P.G. = Performance Grade
–2 grade performance parameters are equivalent to –1 performance parameters except where indicated.