ELECTRICAL CHARACTERISTICS: +2.7V
At TA = –40°C to +85°C, +VDD = +2.7V, VREF = +2.5V, SCL Clock Frequency = 3.4MHz (High-Speed Mode), unless otherwise noted.
ADS7828E
TYP
ADS7828EB
TYP
PARAMETER
CONDITIONS
MIN
MAX
MIN
MAX
UNITS
ANALOG INPUT
Full-Scale Input Scan
Absolute Input Range
Positive Input - Negative Input
Positive Input
0
–0.2
–0.2
VREF
+VDD + 0.2
+0.2
0
–0.2
–0.2
VREF
+VDD + 0.2
+0.2
V
V
V
Negative Input
Capacitance
Leakage Current
25
±1
25
±1
pF
µA
SYSTEM PERFORMANCE
No Missing Codes
Integral Linearity Error
Differential Linearity Error
Offset Error
Offset Error Match
Gain Error
Gain Error Match
Noise
12
12
Bits
LSB(1)
LSB
LSB
LSB
LSB
LSB
µVRMS
dB
±1.0
±1.0
±1.0
±0.2
±1.0
±0.2
33
±2
±0.5
±0.5
±0.75
±0.2
±0.75
±0.2
33
±1
–1, +2
±2
±1
±3
±3
±1
±4
±1
±1
Power-Supply Rejection
82
82
SAMPLING DYNAMICS
Throughput Frequency
High Speed Mode: SCL = 3.4MHz
Fast Mode: SCL = 400kHz
50
8
50
8
kHz
Standard Mode, SCL = 100kHz
2
2
kHz
Conversion Time
6
6
µs
AC ACCURACY
Total Harmonic Distortion
Signal-to-Ratio
Signal-to-(Noise+Distortion) Ratio
Spurious-Free Dynamic Range
Isolation Channel-to-Channel
V
IN = 2.5VPP at 10kHz
–82
72
71
86
120
–82
72
71
86
120
dB(2)
dB
dB
dB
dB
VIN = 2.5VPP at 10kHz
VIN = 2.5VPP at 10kHz
V
IN = 2.5VPP at 10kHz
VOLTAGE REFERENCE OUTPUT
Range
Internal Reference Drift
Output Impedance
2.475
0.05
2.5
15
110
1
2.525
2.475
0.05
2.5
15
110
1
2.525
V
ppm/°C
Ω
GΩ
µA
Internal Reference ON
Internal Reference OFF
Int. Ref. ON, SCL and SDA pulled HIGH
Quiescent Current
850
850
VOLTAGE REFERENCE INPUT
Range
VDD
VDD
V
Resistance
Current Drain
1
20
1
20
GΩ
µA
High Speed Mode: SCL= 3.4MHz
DIGITAL INPUT/OUTPUT
Logic Family
CMOS
CMOS
Logic Levels: VIH
+VDD • 0.7
–0.3
+VDD + 0.5 +VDD • 0.7
+VDD + 0.5
+VDD • 0.3
0.4
V
V
V
µA
µA
VIL
VOL
+VDD • 0.3
–0.3
Min. 3mA Sink Current
VIH = +VDD +0.5
VIL = -0.3
0.4
10
Input Leakage: IIH
IIL
10
–10
–10
Data Format
Straight
Binary
Straight
Binary
ADS7828 HARDWARE ADDRESS
10010
10010
Binary
POWER-SUPPLY REQUIREMENTS
Power-Supply Voltage, +VDD
Quiescent Current
Specified Performance
High Speed Mode: SCL = 3.4MHz
Fast Mode: SCL = 400kHz
Standard Mode, SCL = 100kHz
High Speed Mode: SCL = 3.4MHz
Fast Mode: SCL = 400kHz
Standard Mode, SCL = 100kHz
High Speed Mode: SCL = 3.4MHz
Fast Mode: SCL = 400kHz
Standard Mode, SCL = 100kHz
SCL Pulled HIGH, SDA Pulled HIGH
2.7
3.6
320
2.7
3.6
320
V
225
100
60
675
300
180
70
25
6
400
225
100
60
675
300
180
70
25
6
400
µA
µA
µA
µW
µW
µW
µA
µA
µA
nA
Power Dissipation
1000
1000
Power-Down Mode
w/Wrong Address Selected
Full Power-Down
3000
85
3000
85
TEMPERATURE RANGE
Specified Performance
–40
–40
°C
NOTES: (1) LSB means Least Significant Bit. With VREF equal to 2.5V, 1LSB is 610µV.
(2) THD measured out to the 9th-harmonic.
ADS7828
SBAS181C
3
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TI [ TEXAS INSTRUMENTS ]
