ELECTRICAL CHARACTERISTICS
At T
A
= –40°C to +85°C, +V
CC
= +2.7V, V
REF
= +2.5V, f
SAMPLE
= 125kHz, f
CLK
= 16 • f
SAMPLE
= 2MHz, 12-bit mode, and digital inputs = GND or +V
CC
, unless otherwise
noted.
ADS7843E
PARAMETER
ANALOG INPUT
Full-Scale Input Span
Absolute Input Range
Capacitance
Leakage Current
SYSTEM PERFORMANCE
Resolution
No Missing Codes
Integral Linearity Error
Offset Error
Offset Error Match
Gain Error
Gain Error Match
Noise
Power-Supply Rejection
SAMPLING DYNAMICS
Conversion Time
Acquisition Time
Throughput Rate
Multiplexer Settling Time
Aperture Delay
Aperture Jitter
Channel-to-Channel Isolation
SWITCH DRIVERS
On-Resistance
Y+, X+
Y–, X–
REFERENCE INPUT
Range
Resistance
Input Current
1.0
CS = GND or +V
CC
f
SAMPLE
= 12.5kHz
CS = +V
CC
DIGITAL INPUT/OUTPUT
Logic Family
Logic Levels, Except PENIRQ
V
IH
V
IL
V
OH
V
OL
PENIRQ
V
OL
Data Format
POWER-SUPPLY REQUIREMENTS
+V
CC
Quiescent Current
Specified Performance
f
SAMPLE
= 12.5kHz
Shutdown Mode with
DCLK = DIN = +V
CC
+V
CC
= +2.7V
–40
2.7
280
220
3.6
650
3
1.8
+85
V
µA
µA
µA
mW
°C
5
13
2.5
0.001
CMOS
| I
IH
|
≤
+5µA
| I
IL
|
≤
+5µA
I
OH
= –250µA
I
OL
= 250µA
T
A
= 0°C to +85°C, 100kΩ Pull-Up
Straight Binary
+V
CC
• 0.7
–0.3
+V
CC
• 0.8
+V
CC
+0.3
+0.8
0.4
0.8
CONDITIONS
MIN
TYP
MAX
UNITS
Positive Input – Negative Input
Positive Input
Negative Input
0
–0.2
–0.2
25
0.1
12
11
V
REF
+V
CC
+0.2
+0.2
V
V
V
pF
µA
Bits
Bits
LSB
(1)
LSB
LSB
LSB
LSB
µVrms
dB
Clk Cycles
Clk Cycles
kHz
ns
ns
ps
dB
0.1
0.1
30
70
±2
±6
1.0
±4
1.0
12
3
125
500
30
100
100
V
IN
= 2.5Vp-p at 50kHz
5
6
+V
CC
40
3
Ω
Ω
V
GΩ
µA
µA
µA
V
V
V
V
Power Dissipation
TEMPERATURE RANGE
Specified Performance
NOTE: (1) LSB means Least Significant Bit. With V
REF
equal to +2.5V, 1LSB is 610µV.
ADS7843
SBAS090B
3
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