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ADS7230I Datasheet(PDF) 6 Page - Texas Instruments

Part # ADS7230I
Description  LOW-POWER, 12-BIT, 1MHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADS7230I Datasheet(HTML) 6 Page - Texas Instruments

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ADS7229
ADS7230
SBAS437 – MAY 2008........................................................................................................................................................................................................ www.ti.com
ELECTRICAL CHARACTERISTICS: VREF = 2.5V (continued)
At TA = –40°C to +85°C, +VA = 2.7V to 3.6V, +VBD = 1.65V to 1.5x(+VA), VREF = 2.5V, fSAMPLE = 1MHz for 3V ≤ +VA ≤ 3.6V,
and fSAMPLE = 900kHz for 3V < +VA ≤ 2.7V using external clock, unless otherwise noted.
ADS7229, ADS7230
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DYNAMIC CHARACTERISTICS
VIN = 2.5VPP at 10kHz
–96.8
THD
Total harmonic distortion (4)
dB
VIN = 2.5VPP at 100kHz
–88.4
VIN = 2.5VPP at 10kHz
72
73.2
SNR
Signal-to-noise ratio
dB
VIN = 2.5VPP at 100kHz
72
VIN = 2.5VPP at 10kHz
73.1
SINAD
Signal-to-noise + distortion
dB
VIN = 2.5VPP at 100kHz
72.1
VIN = 2.5VPP at 10kHz
95.9
SFDR
Spurious-free dynamic range
dB
VIN = 2.5VPP at 100kHz
91.5
–3dB small-signal bandwidth
30
MHz
CLOCK
Internal conversion clock frequency
21
23
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–)]
3.6V
≥ +VA ≥ 2.7V
2.475
2.5
2.525
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 ≥ 1.65V
0.65
× (+VBD)
+VBD + 0.3
V
VIL
Low-level input voltage
(+VA
× 1.5)V ≥ +VBD ≥ 1.65V
–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 ≥ 1.65V,
VOH
High-level output voltage
+VBD – 0.6
+VBD
V
IO = 100µA
(+VA
× 1.5)V ≥ +VBD ≥ 1.65V,
VOL
Low-level output voltage
0
0.4
V
IO = 100µA
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 ≤ 1MHz
3
3.6
voltage
+VA
V
fs ≤ 900kHz
2.7
3.6
1MHz sample rate,
4.5
6.0
3V
≤ +VA ≤ 3.6V
900kHz sample rate,
mA
4.2
Supply current
2.7V
≤ +VA ≤ 3V
Nap or Auto Nap mode
0.25
0.4
PD Mode
0.001
1
µA
1MSPS, BVDD = 1.8V
0.1
0.5
Buffer I/O supply current
mA
1MSPS, BVDD = 3V
0.5
1.2
AVDD = 3V, BVDD = 1.8V
13.7
18.9
Power dissipation
mW
AVDD = 3V, BVDD = 3V
15.0
21.6
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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Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): ADS7229 ADS7230


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