Datasheet

Data Sheet ADM3251E
TYPICAL PERFORMANCE CHARACTERISTICS
12
8
4
0
–4
–8
–12
0 200 400 600 800 1000
LOAD CAPACITANCE (pF)
Tx OUTPUT (V)
07388-004
Tx LOW (V
CC
= 5V)
Tx LOW (V
ISO
= 3.3V)
Tx HIGH (V
CC
= 5V)
Tx HIGH (V
ISO
= 3.3V)
Figure 3. Transmitter Output Voltage High/Low vs. Load
Capacitance at 460 kbps
12
10
8
6
4
2
0
–2
–4
–6
–8
–10
4.5 4.7
4.9
5.1
5.3 5.5
V
CC
(V)
Tx OUTPUT (V)
07388-005
Tx OUTPUT HIGH
Tx OUTPUT LOW
Figure 4. Transmitter Output Voltage High/Low vs. V
CC
, R
L
= 3 kΩ
12
8
4
0
–4
–8
–12
10
6
2
–2
–6
–10
3.0 3.5 4.0 4.5 5.0 5.5
V
ISO
(V)
Tx OUTPUT (V)
07388-009
Tx OUTPUT HIGH
Tx OUTPUT LOW
Figure 5. Transmitter Output Voltage High/Low vs. V
ISO
, R
L
= 3 kΩ
12
10
8
6
4
2
0
–2
–4
–6
–8
–10
–12
0 1 2 3 4
LOAD CURRENT (mA)
Tx OUTPUT (V)
07388-006
Tx OUTPUT LOW (V
CC
= 5V)
Tx OUTPUT LOW (V
ISO
= 3.3V)
Tx OUTPUT HIGH (V
CC
= 5V)
Tx OUTPUT HIGH (V
ISO
= 3.3V)
Figure 6. Transmitter Output Voltage High/Low vs. Load Current
15
10
5
0
–5
–10
–15
0 1 2
3 4
LOAD CURRENT (mA)
V+, V– (V)
07388-007
V+ (V
CC
= 5V)
V– (V
CC
= 5V)
V+ (V
ISO
= 3.3V)
V– (V
ISO
= 3.3V)
Figure 7. Charge Pump V+, V− vs. Load Current
400
V+
V–
350
300
250
200
150
100
50
0
4.50 4.75 5.00 5.25 5.50
V
CC
(V)
CHARGE PUMP IMPEDANCE (Ω)
07388-008
Figure 8. Charge Pump Impedance vs. V
CC
Rev. G | Page 9 of 16