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ADS7822EB Datasheet(PDF) 2 Page - Texas Instruments

Part # ADS7822EB
Description  12-Bit, High-Speed, 2.7V microPower Sampling ANALOG-TO-DIGITAL CONVERTER
PDF  20 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADS7822EB Datasheet(HTML) 2 Page - Texas Instruments

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ADS7822
2
SBAS062A
www.ti.com
SPECIFICATIONS: +VCC = +2.7V
At –40
°C to +85°C, +V
CC = +2.7V, VREF = +2.5V, fSAMPLE = 75kHz, fCLK = 16 • fSAMPLE, unless otherwise specified.
ADS7822
ADS7822B
ADS7822C
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
ANALOG INPUT
Full-Scale Input Span
+In – (–In)
0
VREF
0VREF
0VREF
V
Absolute Input Range
+In
–0.2
VCC +0.2
–0.2
VCC +0.2
–0.2
VCC +0.2
V
–In
–0.2
+1.0
–0.2
+1.0
–0.2
+1.0
V
Capacitance
25
25
25
pF
Leakage Current
±1
±1
±1
µA
SYSTEM PERFORMANCE
Resolution
12
12
12
Bits
No Missing Codes
11
12
11
Bits
Integral Linearity Error
–2
±0.5
+2
–1
±0.5
+1
–0.75
±0.25
+0.75
LSB(1)
Differential Linearity Error
–2
±0.5
+2
–1
±0.5
+1
–0.75
±0.25
+0.75
LSB
Offset Error
–3+3
–3+3
–1+1
LSB
Gain Error
–3+3
–3+3
–1+1
LSB
Noise
33
33
33
µVrms
Power Supply Rejection
82
82
82
dB
SAMPLING DYNAMICS
Conversion Time
12
12
12
Clk Cycles
Acquisition Time
1.5
1.5
1.5
Clk Cycles
Throughput Rate
75
75
75
kHz
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion
VIN = 2.5Vp-p at 1kHz
–82
–82
–82
dB
SINAD
VIN = 2.5Vp-p at 1kHz
71
71
71
dB
Spurious Free Dynamic Range
VIN = 2.5Vp-p at 1kHz
86
86
86
dB
REFERENCE INPUT
Voltage Range
0.05
VCC
0.05
VCC
0.05
VCC
V
Resistance
CS = GND, fSAMPLE = 0Hz
55
5
G
Ω
CS = VCC
55
5
G
Ω
Current Drain
At Code 710h
8
40
8
40
8
40
µA
fSAMPLE = 7.5kHz
0.8
0.8
0.8
µA
CS = VCC
0.001
3
0.001
3
0.001
3
µA
DIGITAL INPUT/OUTPUT
Logic Family
CMOS
CMOS
CMOS
Logic Levels:
VIH
IIH = +5µA
2.0
5.5
2.0
5.5
2.0
5.5
V
VIL
IIL = +5µA
–0.3
0.8
–0.3
0.8
–0.3
0.8
V
VOH
IOH = –250µA
2.1
2.1
2.1
V
VOL
IOL = 250µA
0.4
0.4
0.4
V
Data Format
Straight Binary
Straight Binary
Straight Binary
POWER SUPPLY REQUIREMENTS
VCC
Specified Performance
2.7
3.6
2.7
3.6
2.7
3.6
V
See Notes 2 and 3
2.0
2.7
2.0
2.7
2.0
2.7
V
See Note 3
3.6
5.25
3.6
5.25
3.6
5.25
V
Quiescent Current
200
325
200
325
200
325
µA
fSAMPLE = 7.5kHz(4,5)
20
20
20
µA
fSAMPLE = 75kHz(5)
180
180
180
µA
Power Down
CS = VCC
33
3
µA
TEMPERATURE RANGE
Specified Performance
–40
+85
–40
+85
–40
+85
°C
NOTES: (1) LSB means Least Significant Bit. With VREF equal to +2.5V, one LSB is 0.61mV.
(2) The maximum clock rate of the ADS7822 is less than 1.2MHz in this power supply range.
(3) See the Typical Performance Curves for more information.
(4) fCLK = 1.2MHz, CS = VCC for 145 clock cycles out of every 160.
(5) See the Power Dissipation section for more information regarding lower sample rates.



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