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ADS8557I bảng dữ liệu(PDF) 7 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  16-14-12-Bit Six-Channel Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTERS
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Trang chủ  http://www.ti.com
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ADS8557I bảng dữ liệu(HTML) 7 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS: GENERAL
ADS8556
ADS8557
ADS8558
www.ti.com ............................................................................................................................................... SBAS404A – OCTOBER 2006 – REVISED AUGUST 2009
Over recommended operating free-air temperature range of –40°C to +125°C, AVDD = 4.5V to 5.5V, BVDD = 2.7V to 5.5V,
HVDD = 10V to 15V, HVSS = –15V to –10V, VREF = 2.5V (internal), and fDATA = maximum, unless otherwise noted.
ADS8556, ADS8557, ADS8558
PARAMETER
CONDITIONS
MIN
TYP(1)
MAX
UNIT
ANALOG INPUT
RANGE pin/RANGE bit = 0
–4 × VREF
+4 × VREF
V
Bipolar full-scale range
CHXX
RANGE pin/RANGE bit = 1
–2 × VREF
+2 × VREF
V
Input range = ±4 × VREF
10
pF
Input capacitance
Input range = ±2 × VREF
20
pF
Input leakage current
No ongoing conversion
±1
µA
Aperture delay
5
ns
Aperture delay matching
Common CONVST for all channels
250
ps
Aperture jitter
50
ps
EXTERNAL CLOCK INPUT (XCLK)
External clock frequency
fXCLK An external reference must be used for fXCLK > fCCLK
1
18
20
MHz
External clock duty cycle
45
55
%
REFERENCE VOLTAGE OUTPUT (REFOUT)
2.5V operation, REFDAC = 0x3FF
2.485
2.5
2.515
V
2.5V operation, REFDAC = 0x3FF at +25°C
2.496
2.5
2.504
V
Reference voltage
VREF
3.0V operation, REFDAC = 0x3FF
2.985
3.0
3.015
V
3.0V operation, REFDAC = 0x3FF at +25°C
2.995
3.0
3.005
V
Reference voltage drift
dVREF/dT
±10
ppm/°C
Power-supply rejection ratio
PSRR
73
dB
Output current
IREFOUT DC current
–2
2
mA
Short-circuit current(2)
IREFSC
50
mA
Turn-on settling time
tREFON
10
ms
At CREF_x pins
4.7
10
µF
External load capacitance
At REFIO pins
100
470
nF
Tuning range
REFDAC Internal reference output voltage range
0.2 × VREF
VREF
V
REFDAC resolution
10
Bits
REFDAC differential nonlinearity
DNLDAC
–1
±0.1
1
LSB
REFDAC integral nonlinearity
INLDAC
–2
±0.1
2
LSB
REFDAC offset error
VOSDAC VREF = 0.5V (DAC = 0x0CC)
–4
±0.65
4
LSB
REFERENCE VOLTAGE INPUT (REFIN)
Reference input voltage
VREFIN
0.5
2.5
3.025
V
Input resistance
100
M
Input capacitance
5
pF
Reference input current
1
µA
SERIAL CLOCK INPUT (SCLK)
Serial clock input frequency
fSCLK
0.1
36
MHz
Serial clock period
tSCLK
0.0278
10
µs
Serial clock duty cycle
40
60
%
DIGITAL INPUTS(3)
Logic family
CMOS with Schmitt-Trigger
High-level input voltage
0.7 × BVDD
BVDD + 0.3
V
Low-level input voltage
BGND – 0.3
0.3 × BVDD
V
Input current
VI = BVDD to BGND
–50
+50
nA
Input capacitance
5
pF
(1)
All values are at TA = +25°C.
(2)
Reference output current is not limited internally.
(3)
Specified by design.
Copyright © 2006–2009, Texas Instruments Incorporated
7
Product Folder Link(s): ADS8556 ADS8557 ADS8558


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