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ADS7829IDRBT bảng dữ liệu(PDF) 3 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  ANALOG-TO-DIGITAL CONVERTER
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ADS7829IDRBT bảng dữ liệu(HTML) 3 Page - Texas Instruments

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ADS7826
ADS7827
ADS7829
SLAS388 – JUNE 2003
SPECIFICATIONS
At -40
°C to 85°C, V
CC = 2.7 V, Vref = 2.5 V, unless otherwise specified.
ADS7829IB
ADS7829
ADS7826I
ADS7827I
TEST
PARAMETER
UNIT
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
ANALOG INPUT
Full-scale input
+In - (-In)
0
Vref
0
Vref
0
Vref
0
Vref
V
span
Absolute input
+In
-0.2
VCC +0.2
-0.2
VCC +0.2
-0.2
VCC +0.2
-0.2
VCC +0.2
V
range
-IN
-0.2
1.0
-0.2
1.0
-0.2
1.0
-0.2
1.0
V
Capacitance
25
25
25
25
pF
Leakage current
±1
±1
±1
±1
µA
SYSTEM PERFORMANCE
Resolution
12
12
10
8
Bits
No missing codes
12
11
10
8
Bits
Integral linearity error
-1.25
±0.4
1.25
-2
±0.8
2
-1
±0.3
1
-1
±0.2
1
LSB (1)
Differential linearity error
-1
±0.4
1.25
-2
±0.8
2
-1
±0.3
1
-1
±0.2
1
LSB
Offset error
-3
±0.3
3
-3
±0.6
3
-2
±0.4
2
-1
±0.4
1
LSB
Gain error
-2
±0.3
2
-2
±0.6
2
-1
±0.3
1
-1
±0.2
1
LSB
Noise
33
33
33
33
µVrms
Power supply rejection
82
82
94
98
dB
SAMPLING DYNAMICS
Conversion time
12
12
10
8
DCLOCK
Cycles
Acquisition time
1.5
1.5
1.5
1.5
DCLOCK
Cycles
fDCLOCK
16 x fsample
16 x fsample
14 x fsample
12 x fsample
kHz
Throughput
2.7 V
≤ V
CC
125
125
200
250
kHz
(sample rate)
≤ 5.25 V (2)
fsample
2.0 V
≤ V
CC
75
75
85
100
kHz
< 2.7 V (3) (2)
DYNAMIC CHARACTERISTICS
Total harmonic distortion
-82
-80
-78
-72
dB
SINAD
VIN = 2.5 Vpp at
72
70
62
50
dB
1 kHz
Spurious free
VIN = 2.5 Vpp at
85
82
81
68
dB
dynamic range
1 kHz
(SFDR)
REFERENCE INPUT
Voltage range
2.7 V
≤V
CC≤3.6 V
0.05
VCC-0.2
0.05
VCC-0.2
0.05
VCC-0.2
0.05
VCC-0.2
V
Resistance
CS = GND,
5
5
5
5
G
fSAMPLE = 0 Hz
CS = VCC
5
5
5
5
G
Current drain
Full speed at Vref/2
12
60
12
60
20
100
24
120
µA
fSAMPLE = 7.5 kHz
0.8
0.8
0.8
0.8
µA
CS = VCC
0.001
3
0.001
3
0.001
3
0.001
3
µA
DIGITAL INPUT/OUTPUT
Logic family
CMOS
CMOS
CMOS
CMOS
Logic levels
VIH
IIH = +5 µA
2.0
5.5
2.0
5.5
2.0
5.5
2.0
5.5
V
VIL
IIL = +5 µA
-0.3
0.8
-0.3
0.8
-0.3
0.8
-0.3
0.8
V
(1)
LSB means Least Significant Bit and is equal to Vref / 2
N where N is the resolution of ADC. For example, with V
ref equal to 2.5 V, one
LSB is 0.61 mV for a 12 bit ADC (ADS7829).
(2)
See the Typical Performance Curves for VCC = 5 V and Vref = 5 V.
(3)
The maximum clock rate of the ADS7826/27/29 are less than 1.2 MHz at 2 V
≤V
CC <2.7 V. The recommended regerence voltage is
between 1.25 V to 1.024 V.
3


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