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LM12H458CIV データシート(PDF) 10 Page - Texas Instruments

部品番号 LM12H458CIV
部品情報  LM12454/LM12458/LM12H458 12-Bit Sign Data Acquisition System with Self-Calibration
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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LM12H458CIV データシート(HTML) 10 Page - Texas Instruments

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LM12454, LM12458, LM12H458
SNAS079A – MAY 2004 – REVISED FEBRUARY 2006
www.ti.com
DC Characteristics
(1) (2) (3)
The following specifications apply to the LM12454, LM12458, and LM12H458 for VA+ = VD+ = 5V, VREF+ = 5V, VREF− = 0V,
fCLK = 8.0 MHz (LM12H454/8) or fCLK = 5.0 MHz (LM12458), and minimum acquisition time unless otherwise specified.
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C.
Symbol
Parameter
Conditions
Typical (4)
Limits (5)
Units
CS = “1”
ID+
VD+ Supply Current
LM12454/8
0.55
1.0
mA (max)
LM12H458
0.55
1.2
mA (max)
CS = “1”
IA+
VA+ Supply Current
LM12454/8
3.1
5.0
mA (max)
LM12H458
3.1
5.5
mA (max)
Stand-By Supply Current (ID+) + (IA+)
Clock Stopped
10
μA (max)
IST
[Power-Down Mode Selected]
8 MHz Clock
40
μA (max)
VA+ = 5.5V
ON-Channel = 5.5V,
0.1
0.3
μA (max)
Multiplexer ON-Channel Leakage
OFF-Channel = 0V
Current
ON-Channel = 0V
0.1
0.3
μA (max)
OFF-Channel = 5.5V
VA+ = 5.5V
ON-Channel = 5.5V
0.1
0.3
μA (max)
Multiplexer OFF-Channel Leakage
OFF-Channel = 0V
Current
ON-Channel = 0V
0.3
0.1
μA (max)
OFF-Channel = 5.5V
LM12454
VIN = 5V
800
1500
Ω(max)
RON
Multiplexer ON-Resistance
VIN = 2.5V
850
1500
Ω(max)
VIN = 0V
760
1500
Ω(max)
LM12454
VIN = 5V
±1.0%
±3.0%
(max)
Multiplexer Channel-to-Channel
RON matching
VIN = 2.5V
±1.0%
±3.0%
(max)
VIN = 0V
±1.0%
±3.0%
(max)
(1)
Two on-chip diodes are tied to each analog input through a series resistor, as shown below. Input voltage magnitude up to 5V above
VA+ or 5V below GND will not damage the LM12454 or the LM12(H)458. However, errors in the A/D conversion can occur if these
diodes are forward biased by more than 100 mV. As an example, if VA+ is 4.5 VDC, full-scale input voltage must be ≤4.6 VDC to ensure
accurate conversions.
(2)
VA+ and VD+ must be connected together to the same power supply voltage and bypassed with separate capacitors at each V
+ pin to
assure conversion/comparison accuracy.
(3)
Accuracy is guaranteed when operating at fCLK = 5 MHz for the LM12454/8 and fCLK = 8 MHz for the LM12H458.
(4)
Typical figures are at TA = 25°C and represent most likely parametric norm.
(5)
Limits are to AOQL (Average Output Quality Level).
10
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Copyright © 2004–2006, Texas Instruments Incorporated
Product Folder Links: LM12454 LM12458 LM12H458


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