Datasheet

3Maxim Integrated
MAX14920/MAX14921
High-Accuracy 12-/16-Cell Measurement AFEs
DC ELECTRICAL CHARACTERISTICS (continued)
(V
P
= +65V, DGND = AGND, V
L
= V
EN
= +3.3V, V
A
= +5V, C
SAMPLE
= 1FF, T
A
= -40°C to +85°C, unless otherwise noted. Typical
values are at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
P
UVLO UV_V
PVTH
V
P
rising +6 V
UVLO Hysteresis UV_V
PHYST
200 mV
LDOIN UVLO UV_LDOIN
VT
V
LDOIN
rising +5.25 +6 V
V
A
UVLO UV_V
AVTH
V
A
rising +4.7 V
V
L
UVLO UV_V
LVTH
V
L
rising +1.6 V
LDO Output Voltage V
A_LDO_OUT
0 < I
LOAD
< 10mA +4.75 +5 +5.25 V
ANALOG INPUTS (T1, T2, T3)
Input Signal Range V
T
Reference to AGND 0 V
A
V
On-Resistance R
ONA
200
I
Input Leakage Current I
T_LEAK
T_ route to buffer amplifier -1 +1
FA
T_ route to AOUT -1 +1
CAPACITOR INPUTS (CT_)
Capacitor Discharge Current I
LT_
Hold phase, SAMPL = low -1 +1
FA
ANALOG INPUTS (CV_)
Differential Input Signal Range
for Guaranteed Accuracy
V
Dn
V
CVn
– V
CVn-1
(Note 3) +0.5 +4.5 V
CV1 Input Voltage Range V
CV1
0 +5 V
CV2–CV12 Input Voltage Range
(MAX14920)
V
CVn
n ≥ 2, V
CVn
≥ V
CVn-1
(Note 3) +1.5 +65 V
CV2–CV16 Input Voltage Range
(MAX14921)
V
CVm
m ≥ 2, V
CVm
≥ V
CVm-1
(Note 3) +1.5 +65 V
Input Leakage Current
I
LS_
During sampling phase -1 +1
FA
I
LH_
During holding phase -1 +10
I
LC_
During calibration -1 +10
I
LD_
During diagnostics, DIAG = 1 10
Balancing Input Current I
LB_
BA_ active, V
CVn
- V
CVn-1
= +4.5V
(Note 3)
6.5 12 mA
Sample Switch On-Resistance
R
SAMPLE
V
CVn
> +2V, I
SINK
= 2mA (Note 3) 80 150
I
V
CVn
> +1.5V, I
SINK
= 1mA (Note 3) 90
R
SWCAL
V
CVn
> +2V, I
SINK
= 2mA (Note 3) 800 16,000
Cell Undervoltage Threshold UV_V
CVTH
An undervoltage sets the associated SPI
Cn bit
+1.4 +1.5 +1.6 V
Cell Overvoltage Threshold OV_V
CVTH
An overvoltage sets the associated SPI
Cn bit
V
A
V