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ADS8329 Datasheet(PDF) 6 Page - Texas Instruments

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No. de Pieza. ADS8329
Descripción  LOW POWER, 16-BIT, 1-MHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE
Descarga  40 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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ADS8329 Datasheet(HTML) 6 Page - Texas Instruments

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ADS8329
ADS8330
SLAS516 – DECEMBER 2006
SPECIFICATIONS (continued)
T
A = –40°C to 85°C, +VBD = +VA × 1.5 to +1.65 V, Vref = 2.5 V, fSAMPLE = 1 MHz for 3 V ≤ +VA ≤ 3.6 V, fSAMPLE = 900 kHz for
3 V < +VA
≤ 2.7 V using external clock (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DYNAMIC CHARACTERISTICS
VIN = 2.5 Vpp at 10 kHz
–102
THD
Total harmonic distortion (4)
dB
VIN = 2.5 Vpp at 100 kHz
–93
VIN = 2.5 Vpp at 10 kHz
89
SNR
Signal-to-noise ratio
dB
VIN = 2.5 Vpp at 100 kHz
88
VIN = 2.5 Vpp at 10 kHz
88.5
SINAD
Signal-to-noise + distortion
dB
VIN = 2.5 Vpp at 100 kHz
88
VIN = 2.5 Vpp at 10 kHz
104
SFDR
Spurious free dynamic range
dB
VIN = 2.5 Vpp at 100 kHz
94.2
-3dB Small signal bandwidth
30
MHz
CLOCK
Internal conversion clock frequency
21
22.3
23.5
MHz
Used as I/O clock only
42
SCLK External serial clock
MHz
As I/O clock and conversion clock
1
42
EXTERNAL VOLTAGE REFERENCE INPUT
Vref[REF+ – (REF–)]
3.6 V
≥ +VA ≥ 2.7 V
2.475
3
Input reference
Vref
V
range
(REF–) – AGND
–0.1
0.1
Resistance (5)
Reference input
40
k
DIGITAL INPUT/OUTPUT
Logic family — CMOS
VIH
High-level input voltage
(+VA × 1.5) V
≥ +VBD ≥ 1.65 V
0.65
× (+VBD)
+VBD + 0.3
V
VIL
Low-level input voltage
(+VA × 1.5) V
≥ +VBD ≥ 1.65 V
–0.3
0.35
× (+VBD)
V
II
Input current
VI = +VBD or BDGND
-50
50
nA
Ci
Input capacitance
5
pF
(+VA × 1.5) V
≥ +VBD ≥ 1.65 V,
VOH
High-level output voltage
+VBD – 0.6
+VBD
V
IO = 100 µA
(+VA × 1.5) V
≥ +VBD ≥ 1.65 V,
VOL
Low-level output voltage
0
0.4
V
IO = 100 µA
CO
Output capacitance
5
pF
CL
Load capacitance
30
pF
Data format — straight binary
POWER SUPPLY REQUIREMENTS
+VBD
1.65
+VA
1.5 × (+VA)
V
Power supply
fs ≤ 1 MHz
3
3.6
voltage
+VA
V
fs ≤ 900 kHz
2.7
3.6
1-MHz Sample rate,
5.1
6.1
3 V
≤ +VA ≤ 3.6 V
900-kHz Sample rate,
mA
4.84
Supply current
2.7 V
≤ +VA ≤ 3 V
Nap mode
0.25
0.4
PD Mode
2
50
nA
Buffer I/O supply current
1 MSPS, +VBD = 1.8 V
0.05
mA
+VBD = 1.8 V, 3 V
≤ +VA ≤ 3.6 V
15.5
19
Power dissipation
mW
+VBD = 1.8 V, 2.7 V
≤ +VA ≤ 3 V
13.2
TEMPERATURE RANGE
TA
Operating free-air temperature
–40
85
°C
(4)
Calculated on the first nine harmonics of the input frequency
(5)
Can vary ±30%
6
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