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ADS5421 Arkusz danych(PDF) 3 Page - Texas Instruments

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Numer części ADS5421
Szczegółowy opis  14-Bit, 40MHz Sampling ANALOG-TO-DIGITAL CONVERTER
Download  26 Pages
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

ADS5421 Arkusz danych(HTML) 3 Page - Texas Instruments

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ADS5421
3
SBAS237E
www.ti.com
DIGITAL INPUTS
Clock Input
Rising Edge of Convert Clock
+0.5
+VSD
VPP
Logic Family (other than clock inputs)
+3V/+5V Compatible CMOS
High Level Input Current(5) (VIN = 5V)
100
µA
Low Level Input Current (VIN = 0V)
10
µA
High Level Input Voltage
+2.0
V
Low Level Input Voltage
+1.0
V
Input Capacitance
5pF
DIGITAL OUTPUTS(6)
Logic Family
+3V/+5V Compatible CMOS
Logic Coding
Straight Offset Binary
Low Output Voltage (IOL = 50µA to 0.5mA)
VDRV = 3V
+0.2
V
High Output Voltage (IOH = 50µA to 0.5mA)
+2.5
V
Low Output Voltage (IOL = 50µA to 1.6mA)
VDRV = 5V
+0.2
V
High Output Voltage (IOH = 50µA to 1.6mA)
+2.5
V
3-State Enable Time
OE = LOW
20
40
ns
3-State Disable Time
OE = HIGH
2
10
ns
Output Capacitance
5pF
ACCURACY
Zero Error (Referred to –FS)
at +25
°C
±0.5
±1.0
%FS
Zero Error Drift (Referred to –FS)
15
ppm/
°C
Gain Error(7)
at +25
°C
±0.2
±1.0
%FS
Gain Error Drift(7)
35
ppm/
°C
Power-Supply Rejection of Gain
∆V
S = ±5%
68
dB
Internal REF Tolerance (VREFT, VREFB)
Deviation from Ideal
±10
±50
mV
External REF Voltage Range
(VREFT – VREFB)
1.4
2
2.025
V
Reference Input Resistance
1.0
k
POWER-SUPPLY REQUIREMENTS
Supply Voltage: +VSA, +VSD
Operating, fIN = 10MHz
+4.75
+5.0
+5.25
V
Supply Current: +IS
Operating, fIN = 10MHz
170
mA
Output Driver Supply Current (VDRV)
12
mA
Power Dissipation: VDRV = 5V
900
mW
VDRV = 3V
850
925
mW
Power Down
Operating
40
mW
Thermal Resistance,
θ
JA
LQFP-64
48
°C/W
NOTES: (1) Spurious-Free Dynamic Range refers to the magnitude of the largest harmonic. (2) dBFS means dB relative to Full-Scale. (3) 2-tone intermodulation
distortion is referred to the largest fundamental tone. This number will be 6dB higher if it is referred to the magnitude of the 2-tone fundamental envelope.
(4) Effective Number of Bits (ENOB) is defined by (SINAD – 1.76)/6.02. (5) A 50k
Ω pull-down resistor is inserted internally. (6) Recommended maximum
capacitance loading, 15pF. (7) Includes internal reference.
ELECTRICAL CHARACTERISTICS (Cont.)
TA = specified temperature range, typical at +25°C, +VSA = +VSD = +5V, differential input range = 1.5V to 3.5V each input (4VPP), sampling rate = 40MHz, internal
reference, VDRV = +3V, and –1dBFS, unless otherwise noted.
ADS5421Y
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS


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