Datasheet

7Maxim Integrated
MAX14920/MAX14921
High-Accuracy 12-/16-Cell Measurement AFEs
Typical Operating Characteristics
(V
CVn
- V
CV(n - 1)
= +3.3V (where n = 1–12 (MAX14920) and n = 1–16 (MAX14921)), T
A
= +25°C, unless otherwise noted.)
I
P
vs. V
P
MAX14920 toc01
V
P
(V)
I
P
(µA)
4525
10
20
30
40
50
60
0
56
5
SAMPLE MODE
LDO DISABLED
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
T
A
(°C)
I
P
(µA)
603510-15
10
20
30
40
50
60
0
-40 85
I
P
vs. TEMPERATURE
MAX14920 toc02
SAMPLE MODE
LDO DISABLED
V
P
= 6V
V
P
= 24V
V
P
= 65V
LDO OUTPUT VOLTAGE CHANGE
vs. LOAD CURRENT
MAX14920 toc03
I
OUT
(mA)
CHANGE IN OUTPUT VOLTAGE (%)
8642
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
01
0
V
P
= 10V
VOLTAGE ERROR vs. CELL VOLTAGE
MAX14920 toc04
CELL VOLTAGE (V)
ERROR (mV)
3.52.51.5
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
-0.4
0.5 4.5
V
CVn-1
= 40V
t
SAMPLE
= 4ms
V
CVn-1
= 20V
V
CVn-1
= 60V
V
CVn-1
= 0V
T
A
(°C)
V
AOUT
SETTLING TIME (µs)
603510-15
1
2
3
4
5
6
0
-40 85
V
AOUT
SETTLING TIME
vs. TEMPERATURE
MAX14920 toc05
t
SAMPLE
= 4ms
V
CVn
- V
CVn-1
= 1.5V
V
P
= 24V
SETTLE TO 1mV
V
AOUT
DROOP TIME
vs. TEMPERATURE
MAX14920 toc06
T
A
(°C)
V
AOUT
DROOP TIME (ms)
603510-15
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
-40 85
t
SAMPLE
= 4ms
V
CVn
- V
CVn-1
= 1.5V
V
P
= 24V
T_ ON-RESISTANCE vs. V
T_
MAX14920 toc07
V
T_
(V)
R
ON
(I)
4321
20
40
60
80
100
120
140
160
180
200
0
05
I
T_
= 0.1mA
V
BAn
- V
CVn-1
vs. I
BAn
MAX14920 toc08
I
BAn
(mA)
V
BAn
- V
CVn-1
(V)
4321
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
05
V
CVn
- V
CVn-1
= 3.3V
V
OH
V
L
SUPPLY CURRENT
vs. TEMPERATURE
MAX14920 toc09
T
A
(°C)
V
L
SUPPLY CURRENT (µA)
603510-15
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
-40 85
V
L
= 5V
SAMPL = V
L
V
L
= 3.3V
V
L
= 1.8V