Datasheet

REV. A–4–
AD8304–Typical Performance Characteristics
1.6
0
V
LOG
– V
1.4
0.8
0.6
0.4
0.2
1.2
1.0
–40C
+25C
+85C
INPUT – A
100p 10m1n 10n 100n 1 10 100 1m
T
A
= –40C, +25C, +85C
V
N
= –0.5V
0C
+70C
TPC 1. V
LOG
vs. I
PD
INPUT – A
2.0
–2.0
100p 10m1n
ERROR – dB (10mV/dB)
10n 100n 1 10 100 1m
1.5
0
–0.5
–1.0
–1.5
1.0
0.5
+25C
–40C
T
A
= –40C, +25C, +85C
V
N
= –0.5V
0C
+70C
+85C
TPC 2. Logarithmic Conformance (Linearity) for V
LOG
2.0
–2.0
ERROR FROM IDEAL OUTPUT – dB (10mV/dB)
1.5
0
–0.5
–1.0
–1.5
1.0
0.5
5.5V
5.0V
4.5V
INPUT – A
100p 10m1n 10n 100n 1 10 100 1m
V
P
= 4.5V, 5.0V, 5.5V
V
N
= –0.1V
TPC 3. Absolute Deviation from Nominal Speci-
fied Value of V
LOG
for Several Supply Voltages
0.510
V
SUM
– V
0.508
0.502
0.500
0.506
0.504
+85C
+25C
–40C
INPUT – A
100p 10m1n 10n 100n 1 10 100 1m
T
A
= –40C, +25C, +85C
TPC 4. V
SUM
vs. I
PD
INPUT – mA
2.8
1.4
0.6
0101
V
PDB
– V
23456 789
2.6
1.6
1.2
0.8
2.0
1.8
1.0
2.4
2.2
–40C
+25C
+85C
T
A
= –40C, +25C, +85C
TPC 5. V
PDB
vs. I
PD
INPUT – A
2.4
0.6
100p 10m1n
V
OUT
– V
10n 100n 1 10 100 1m
2.2
1.6
1.4
1.2
1.0
2.0
1.8
+85C
+25C
–40C
0.8
1.25
–1.00
ERROR – dB (10mV/dB)
1.00
0.25
0
–0.25
–0.50
0.75
0.50
–0.75
T
A
= –40C, +25C, +85C
V
P
= 3.0V
TPC 6. Logarithmic Conformance (Linearity) for a
3 V
Single Supply (See Figure 6)
(V
P
= 5 V, V
N
= 0 V, T
A
= 25C, unless otherwise noted.)