LM12454 Datasheet, PDF (7/43 Pages) National Semiconductor (TI) – 12-Bit Sign Data Acquisition System with Self-Calibration

DC Characteristics (Notes 6, 7, 8, 19)
The
f_CLK
following specifications apply
= 8.0 MHz (LM12H454/8) or
to the
f_CLK =
LM12454, LM12458,
5.0 MHz (LM12458),
and
and
LM12H458 for V_A+ =
minimum acquisition
V_D+
time
= 5V,
unless
V_REF+ = 5V, V_REF− = 0V,
otherwise specified. Bold-
face limits apply for T_A = T_J = T_MIN to T_MAX; all other limits T_A = T_J = 25˚C.
Symbol
Parameter
Conditions
Typical
Limits
Unit
(Note 10) (Note 11)
(Limit)
I_D+
V_D+ Supply Current
CS = “1”
LM12454/8
0.55
1.0
mA (max)
LM12H458
0.55
1.2
I_A+
V_A+ Supply Current
CS = “1”
LM12454/8
3.1
5.0
mA (max)
LM12H458
3.1
5.5
I_ST
Stand-By Supply Current (I_D+ + I_A+)
Power-Down Mode Selected
Clock Stopped
10
µA (max)
8 MHz Clock
40
µA (max)
Multiplexer ON-Channel Leakage Current V_A+ = 5.5V
ON-Channel = 5.5V
0.3
OFF-Channel = 0V
0.1
µA (max)
LM12(H)458MEL
0.5
ON-Channel = 0V
0.3
OFF-Channel = 5.5V
0.1
µA (max)
LM12(H)458MEL
0.5
Multiplexer OFF-Channel Leakage Current V_A+ = 5.5V
ON-Channel = 5.5V
0.3
OFF-Channel = 0V
0.1
µA (max)
LM12(H)458MEL
0.5
ON-Channel = 0V
0.3
OFF-Channel = 5.5V
0.1
µA (max)
LM12(H)458MEL
0.5
R_ON
Multiplexer ON-Resistance
Multiplexer Channel-to-Channel
LM12454
V_IN = 5V
V_IN = 2.5V
V_IN = 0V
LM12454
800
1500
Ω(max)
850
1500
Ω(max)
760
1500
Ω(max)
R_ON matching
V_IN = 5V
V_IN = 2.5V
V_IN = 0V
±1.0%
±1.0%
±1.0%
±3.0%
±3.0%
±3.0%
(max)
(max)
(max)
Internal Reference Characteristics (Notes 6, 7, 19)
The following specifications apply to the LM12454, LM12458, and LM12H458
Boldface limits apply for T_A = T_J = T_MIN to T_MAX; all other limits T_A = T_J =
for V_A+
25˚C.
=
V_D+
=
5V
unless
otherwise
specified.
Symbol
Parameter
Conditions
Typical
Limits
Unit
(Note 10) (Note 11)
(Limit)
V_REFOUT Internal Reference Output Voltage
LM12(H)458MEL
2.5
2.5 ±4%
V (max)
2.5 ±6%
∆V_REF/∆T Internal Reference Temperature
Coefficient
40
ppm/˚C
∆_REF/∆I_L Internal Reference Load Regulation
Sourcing (0 < I_L ≤ +4 mA)
Sinking (−1 ≤ I_IL < 0 mA)
∆V_REF
Line Regulation
4.5V ≤ V_A+ ≤ 5.5V
3
I_SC
Internal Reference Short Circuit Current
V_REFOUT = 0V
13
∆V_REF/∆t Long Term Stability
200
0.2
%/mA (max)
1.2
%/mA (max)
20
mV (max)
25
mA (max)
ppm/kHr
7
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