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参数资料
| 型号： | DS1244Y |
| 英文描述： | Low-Power, 24-Bit ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 低功耗，24位模拟数字转换器 |
| 文件页数： | 3/19页 |
| 文件大小： | 292K |
| 代理商： | DS1244Y |
ADS1244
SBAS273
3
www.ti.com
ELECTRICAL CHARACTERISTICS
All specifications
–
40
°
C to +85
°
C, AVDD = 5V, DVDD = +3V, f
CLK
= 2.4576MHz, and V
REF
= 2.5V, unless otherwise specified.
ADS1244
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG INPUT
Full-Scale Input Voltage Range
Absolute Input Range
Differential Input Impedance
AINP
–
AINN
±
2V
REF
V
V
AINP, AINN with Respect to GND
f
CLK
= 2.4576MHz
GND
–
0.1
AVDD + 0.1
5
M
SYSTEM PERFORMANCE
Resolution
Data Rate
Integral Nonlinearity (INL)
Offset Error
Offset Error Drift
(3)
Gain Error
Gain Error Drift
(3)
Common-Mode Rejection
No Missing Codes
f
= 2.4576MHz
24
Bits
sps
(1)
% FSR
(2)
ppm of FSR
ppm of FSR/
°
C
%
ppm/
°
C
dB
dB
dB
dB
dB
ppm of FSR, rms
dB
dB
15
Differential Input Signal, End Point Fit
±
0.0002
1
0.01
0.005
0.5
130
±
0.0008
10
0.02
at DC
90
100
100
60
70
f
CM(4)
= 50
±
1Hz, f
CLK
= 2.4576MHz
f
= 60
±
1Hz, f
CLK
= 2.4576MHz
f
SCM
= 50
±
1Hz, f
CLK
= 2.4576MHz
f
SIG
= 60
±
1Hz, f
CLK
= 2.4576MHz
Normal-Mode Rejection
Input Referred Noise
Analog Power-Supply Rejection
Digital Power-Supply Rejection
1
at DC,
AVDD = 5%
at DC,
DVDD = 5%
105
100
VOLTAGE REFERENCE INPUT
Reference Input Voltage (V
)
Negative Reference Input (VREFN)
Positive Reference Input (VREFP)
Voltage Reference Impedance
V
REF
≡
VREFP
–
VREFN
0.5
2.5
AVDD
(6)
VREFP
–
0.5
AVDD + 0.1
V
V
V
GND
–
0.1
VREFN + 0.5
f
CLK
= 2.4576MHz
1
M
DIGITAL INPUT/OUTPUT
Logic Levels
V
IH
(CLK, SCLK)
V
IL
(CLK, SCLK)
V
OH
(
DRDY/DOUT
)
V
(
DRDY/DOUT
)
Input Leakage (CLK, SCLK)
CLK Frequency (f
CLK
)
CLK Duty Cycle
2.1
GND
2.6
5.25
0.9
V
V
V
V
μ
A
MHz
%
I
OH
= 1mA
I
= 1mA
0.4
±
10
6
70
0 < (CLK, SCLK) < DVDD
30
POWER SUPPLY
AVDD
DVDD
AVDD Current
2.5
1.8
5.25
3.6
1
V
V
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
μ
W
Sleep Mode
AVDD = 3V
AVDD = 5V
0.1
85
90
0.1
1.3
4.5
270
150
DVDD Current
Sleep Mode, CLK Stopped
Sleep Mode, 2.4576MHz CLK Running
DVDD = 3V
AVDD = DVDD = 3V
5
10
Total Power Dissipation
NOTES: (1) sps = Samples Per Second. (2) FSR = Full-Scale Range = 4V
. (3) Recalibration can reduce these errors to the level of the noise. (4) f
CM
is the frequency
of the common-mode input. (5) f
SIG
is the frequency of the input signal. (6) It will not be possible to reach the digital output full-scale code when V
REF
> AVDD/2.
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