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LM12454CIV View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
LM12454CIV 12-Bit + Sign Data Acquisition System with Self-Calibration National-Semiconductor
National ->Texas Instruments National-Semiconductor
LM12454CIV Datasheet PDF : 36 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Converter AC Characteristics (Notes 6, 7, 8, 9) (Continued)
The following specifications apply to the LM12454, LM12458, and LM12H458 for VA+ = VD+ = 5V, VREF+ = 5V, VREF− = 0V,
12-bit + sign conversion mode, fCLK = 8.0 MHz (LM12H458) or fCLK = 5.0 MHz (LM12454/8), RS = 25, source impedance for
VREF+ and VREF− 25, fully-differential input with fixed 2.5V common-mode voltage, 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
(Note 10)
Limits (Note 11)
Units
“Watchdog” Mode
tWD
Comparison Time
Sequencer States S6, S4, and S5
(Figure 15)
11 (tCLK)
11 (tCLK) + 50 ns
(max)
VIN = ±5V
DSNR
Differential Signal-to-Noise
fIN = 1 kHz
77.5
dB
Ratio
fIN = 20 kHz
75.2
dB
fIN = 40 kHz
74.7
dB
VIN = 5 Vp-p
SESNR Single-Ended Signal-to-Noise fIN = 1 kHz
69.8
dB
Ratio
fIN = 20 kHz
69.2
dB
fIN = 40 kHz
66.6
dB
VIN = ±5V
Differential Signal-to-Noise +
DSINAD
fIN = 1 kHz
76.9
dB
Distortion Ratio
fIN = 20 kHz
73.9
dB
fIN = 40 kHz
70.7
dB
VIN = 5 Vp-p
Single-Ended Signal-to-Noise
SESINAD
fIN = 1 kHz
69.4
dB
+ Distortion Ratio
fIN = 20 kHz
68.3
dB
fIN = 40 kHz
65.7
dB
VIN = ±5V
DTHD
Differential Total Harmonic
fIN = 1 kHz
−85.8
dB
Distortion
fIN = 20 kHz
−79.9
dB
fIN = 40 kHz
−72.9
dB
VIN = 5 Vp-p
SETHD Single-Ended Total Harmonic fIN = 1 kHz
−80.3
dB
Distortion
fIN = 20 kHz
−75.6
dB
fIN = 40 kHz
−72.8
dB
VIN = ±5V
Differential Effective Number
DENOB
fIN = 1 kHz
12.6
Bits
of Bits
fIN = 20 kHz
12.2
Bits
fIN = 40 kHz
12.1
Bits
VIN = 5 Vp-p
Single-Ended Effective
SEENOB
fIN = 1 kHz
11.3
Bits
Number of Bits
fIN = 20 kHz
11.2
Bits
fIN = 40 kHz
10.8
Bits
VIN = ±5V
Differential Spurious Free
DSFDR
fIN = 1 kHz
87.2
dB
Dynamic Range
fIN = 20 kHz
78.9
dB
fIN = 40 kHz
72.8
dB
Multiplexer
VIN = 5 VP-P, fIN = 40 kHz,
−76
LM12454 MUXOUT Only
dB
Channel-to-Channel
Crosstalk
VIN = 5 VP-P, fIN = 40 kHz,
−78
dB
LM12(H)458 MUX plus Converter
tPU
Power-Up Time
tWU
Wake-Up Time
10
ms
10
ms
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