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ADS7844EBG4 Datasheet(PDF) 3 Page - Texas Instruments

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Part # ADS7844EBG4
Description  ANALOG-TO-DIGITAL CONVERTER
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADS7844EBG4 Datasheet(HTML) 3 Page - Texas Instruments

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ADS7844
3
SBAS100A
www.ti.com
SPECIFICATION: +2.7V
At TA = –40°C to +85°C, +VCC = +2.7V, VREF = +2.5V, fSAMPLE = 125kHz, and fCLK = 16 • fSAMPLE = 2MHz, unless otherwise noted.
ADS7844E, N
ADS7844EB, NB
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
ANALOG INPUT
Full-Scale Input Span
Positive Input - Negative Input
0
VREF
✻✻
V
Absolute Input Range
Positive Input
–0.2
+VCC +0.2
✻✻
V
Negative Input
–0.2
+0.2
✻✻
V
Capacitance
25
pF
Leakage Current
±1
µA
SYSTEM PERFORMANCE
Resolution
12
Bits
No Missing Codes
12
Bits
Integral Linearity Error
±2
±1
LSB(1)
Differential Linearity Error
±0.8
±0.5
±1
LSB
Offset Error
±3
LSB
Offset Error Match
0.15
1.0
✻✻
LSB
Gain Error
±4
±3
LSB
Gain Error Match
0.1
1.0
✻✻
LSB
Noise
30
µVrms
Power Supply Rejection
70
dB
SAMPLING DYNAMICS
Conversion Time
12
Clk Cycles
Acquisition Time
3
Clk Cycles
Throughput Rate
125
kHz
Multiplexer Settling Time
500
ns
Aperture Delay
30
ns
Aperture Jitter
100
ps
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion(2)
VIN = 2.5VPP at 10kHz
–75
–77
dB
Signal-to-(Noise + Distortion)
VIN = 2.5VPP at 10kHz
71
72
dB
Spurious Free Dynamic Range
VIN = 2.5VPP at 10kHz
78
80
dB
Channel-to-Channel Isolation
VIN = 2.5VPP at 50kHz
100
dB
REFERENCE INPUT
Range
0.1
+VCC
✻✻
V
Resistance
DCLK Static
5
G
Input Current
13
40
✻✻
µA
fSAMPLE = 12.5kHz
2.5
µA
DCLK Static
0.001
3
✻✻
µA
DIGITAL INPUT/OUTPUT
Logic Family
CMOS
Logic Levels
VIH
| IIH | ≤ +5µA+VCC • 0.7
5.5
✻✻
V
VIL
| IIL | ≤ +5µA
–0.3
+0.8
✻✻
V
VOH
IOH = –250µA+VCC • 0.8
V
VOL
IOL = 250µA
0.4
V
Data Format
Straight Binary
POWER SUPPLY REQUIREMENTS
+VCC
Specified Performance
2.7
3.6
✻✻
V
Quiescent Current
280
650
✻✻
µA
fSAMPLE = 12.5kHz
220
µA
Power-Down Mode(3), CS = +VCC
3
µA
Power Dissipation
1.8
mW
TEMPERATURE RANGE
Specified Performance
–40
+85
✻✻
°C
✻ Same specifications as ADS7844E, ADS7844N.
NOTE: (1) LSB means Least Significant Bit. With VREF equal to +2.5V, one LSB is 610mV. (2) First five harmonics of the test frequency. (3) Auto power-down mode
(PD1 = PD0 = 0) active or SHDN = GND.


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