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Am79M574 Data Sheet
Power Dissipation BAT = –48 V, Normal Polarity
On-hook Open Circuit state
–1*
35
35
120
80
mW
On-hook OHT state
–1*
135
135
250
200
On-hook Active state
–1*
200
200
400
300
Off-hook OHT state
RL = 600 Ω
500
750
Off-hook Active state
RL = 600 Ω
650
1000
Supply Currents
VCC On-hook supply current
Open Circuit state
OHT state
Active state
3.0
6.0
7.5
4.5
10.0
12.0
mA
VEE On-hook supply current
Open Circuit state
OHT state
Active state
1.0
2.2
2.7
2.3
3.5
6.0
VBAT On-hook supply current
Open Circuit state
OHT state
Active state
0.4
3.0
4.0
1.0
5.0
6.0
Power Supply Rejection Ratio (VRIPPLE = 50 mVrms)
VCC
50 Hz to 3400 Hz
–1*
25
30
45
45
dB
6, 7
3.4 kHz to 50 kHz
–1*
22
25
35
35
VEE
50 Hz to 3400 Hz
–1*
20
25
40
40
6, 7
3.4 kHz to 50 kHz
–1*
10
10
25
25
VBAT
50 Hz to 3400 Hz
–1*
27
30
45
45
6, 7
3.4 kHz to 50 kHz
–1*
20
25
40
40
Off-Hook Detector
Current threshold accuracy
IDET = 365/RD Nominal
–20
+20
%
Ground-Key Detector Thresholds, Active State, BAT = –48 V (See Test Circuit F)
Ground-key resistance threshold B(RING) to GND
2.0
5.0
10.0
k
Ω
Ground-key current threshold
B(RING) to GND
Midpoint to GND
9
9
mA
8
Ring-Trip Detector Input
Bias current
–5
–0.05
µA
Offset voltage
Source resistance 0 to 2 M
Ω
–50
0
+50
mV
13
ELECTRICAL CHARACTERISTICS
(continued)
Description
Test Conditions (See Note 1)
Min
Typ
Max
Unit
Note