LM12458CIV National Semiconductor, LM12458CIV Datasheet - Page 5
LM12458CIV
Manufacturer Part Number
LM12458CIV
Description
A/D Converter (A-D) IC
Manufacturer
National Semiconductor
Datasheet
1.LM12458CIV.pdf
(36 pages)
Specifications of LM12458CIV
Resolution (bits)
13bit
Sampling Rate
114kSPS
Input Channel Type
Differential, Single Ended
Data Interface
Parallel
No. Of Pins
44
Input Channels Per Adc
8
Mounting Type
Surface Mount
No. Of Channels
1
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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DNL
V
V
V
PSS
C
C
t
t
t
t
C
A
Z
CAL
Symbol
IN+
IN−
IN+
REF
IN
Converter Characteristics
The following specifications apply to the LM12454, LM12458, and LM12H458 for V
12-bit + sign conversion mode, f
V
otherwise specified. Boldface limits apply for T
Converter AC Characteristics
The following specifications apply to the LM12454, LM12458, and LM12H458 for V
12-bit + sign conversion mode, f
V
otherwise specified. Boldface limits apply for T
Symbol
REF+
REF+
− V
IN−
and V
and V
Clock Duty Cycle
Conversion Time
Acquisition Time
Auto-Zero Time
Full Calibration Time
Throughput Rate (Note 18)
REF−
REF−
8-Bit + Sign and “Watchdog” Mode
Differential Non-Linearity
8-Bit + Sign and “Watchdog” Mode
Zero Error
8-Bit + Sign and “Watchdog” Full-Scale
Error
8-Bit + Sign and “Watchdog” Mode
DC Common Mode Error
Multiplexer Channel-to-Channel
Matching
Non-Inverting Input Range
Inverting Input Range
Differential Input Voltage Range
Common Mode Input Voltage Range
Power Supply
Sensitivity (Note
15)
V
Selected Multiplexer Channel Input
Capacitance
REF+
≤ 25Ω, fully-differential input with fixed 2.5V common-mode voltage, and minimum acquisition time unless
≤ 25Ω, fully-differential input with fixed 2.5V common-mode voltage, and minimum acquisition time unless
Parameter
/V
REF−
Input Capacitance
Parameter
CLK
CLK
Zero Error
Full-Scale Error
Linearity Error
= 8.0 MHz (LM12H458) or f
= 8.0 MHz (LM12H458) or f
13-Bit Resolution, Sequencer
State S5 (Figure 15)
9-Bit Resolution, Sequencer State
S5 (Figure 15)
Sequencer State S7 (Figure 15)
Built-in minimum for 13-Bits
Built-in minimum for 9-Bits and
“Watchdog” mode
Sequencer State S2 (Figure 15)
Sequencer State S2 (Figure 15)
LM12H458
(Notes 6, 7, 8, 9) (Continued)
A
A
(Notes 6, 7, 8, 9)
= T
= T
Conditions
J
J
After Auto-Zero
V
V
= T
= T
A
REF+
+ = V
MIN
MIN
= 4.5V, V
5
to T
to T
D
CLK
CLK
+ = 5V
Conditions
MAX
MAX
= 5.0 MHz (LM12454/8), R
= 5.0 MHz (LM12454/8), R
; all other limits T
; all other limits T
REF−
±
10%
= GND
4944 (t
(Note 10)
44 (t
21 (t
76 (t
Typical
9 (t
2 (t
142
50
89
CLK
CLK
A
A
CLK
CLK
CLK
+ = V
+ = V
CLK
)
)
)
)
)
)
A
A
D
D
(Note 10)
= T
= T
+ = 5V, V
Typical
+ = 5V, V
4944 (t
±
±
±
±
±
44 (t
21 (t
76 (t
Limits (Note 11)
9 (t
2 (t
0.05
85
75
J
J
1/8
0.2
0.4
0.2
S
S
= 25˚C.
= 25˚C.
CLK
CLK
= 25Ω, source impedance for
= 25Ω, source impedance for
CLK
CLK
CLK
CLK
140
40
60
88
) + 50 ns
) + 50 ns
REF+
REF+
) + 50 ns
) + 50 ns
) + 50 ns
) + 50 ns
(Note 11)
Limits
±
GND
GND
−V
GND
±
±
±
= 5V, V
= 5V, V
V
V
V
V
1.75
±
3/4
1/2
1/2
A
A
A
A
2
A
+
+
+
+
+
REF−
REF−
www.national.com
kHz (min)
kHz (min)
LSB (max)
LSB (max)
LSB (max)
LSB (max)
LSB (max)
% (max)
% (min)
V (max)
V (max)
V (max)
V (max)
V (min)
V (min)
V (min)
V (min)
Units
(max)
(max)
(max)
(max)
(max)
(max)
= 0V,
= 0V,
Units
LSB
LSB
LSB
%
pF
pF