SPECIFICATION: +2.7V
At T
A
= –40°C to +85°C, +V
CC
= +2.7V, V
REF
= +2.5V, f
SAMPLE
= 125kHz, and f
CLK
= 16 • f
SAMPLE
= 2MHz, unless otherwise noted.
ADS7844E, N
PARAMETER
ANALOG INPUT
Full-Scale Input Span
Absolute Input Range
Capacitance
Leakage Current
SYSTEM PERFORMANCE
Resolution
No Missing Codes
Integral Linearity Error
Differential 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
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion
(2)
Signal-to-(Noise + Distortion)
Spurious Free Dynamic Range
Channel-to-Channel Isolation
REFERENCE INPUT
Range
Resistance
Input Current
V
IN
V
IN
V
IN
V
IN
=
=
=
=
2.5Vp-p
2.5Vp-p
2.5Vp-p
2.5Vp-p
at
at
at
at
10kHz
10kHz
10kHz
50kHz
0.1
DCLK Static
f
SAMPLE
= 12.5kHz
DCLK Static
DIGITAL INPUT/OUTPUT
Logic Family
Logic Levels
V
IH
V
IL
V
OH
V
OL
Data Format
POWER SUPPLY REQUIREMENTS
+V
CC
Quiescent Current
5
13
2.5
0.001
CMOS
| I
IH
|
≤
+5µA
| I
IL
|
≤
+5µA
I
OH
= –250µA
I
OL
= 250µA
+V
CC
• 0.7
–0.3
+V
CC
• 0.8
Straight Binary
Specified Performance
f
SAMPLE
= 12.5kHz
Power-Down Mode
(3)
, CS = +V
CC
Power Dissipation
TEMPERATURE RANGE
Specified Performance
T
Same specifications as ADS7844E, ADS7844N.
NOTE: (1) LSB means Least Significant Bit. With V
REF
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.
–40
2.7
280
220
3.6
650
3
1.8
+85
T
T
T
T
5.5
+0.8
0.4
T
T
T
T
T
T
V
µA
µA
µA
mW
°C
T
T
T
CONDITIONS
MIN
TYP
MAX
MIN
T
T
T
T
T
T
T
±0.8
0.15
0.1
30
70
±2
±3
1.0
±4
1.0
±0.5
T
T
T
T
±1
±1
T
T
±3
T
ADS7844EB, NB
TYP
MAX
T
T
T
UNITS
Positive Input - Negative Input
Positive Input
Negative Input
0
–0.2
–0.2
25
±1
12
12
V
REF
+V
CC
+0.2
+0.2
V
V
V
pF
µA
Bits
Bits
LSB
(1)
LSB
LSB
LSB
LSB
LSB
µVrms
dB
Clk Cycles
Clk Cycles
kHz
ns
ns
ps
dB
dB
dB
dB
12
3
125
500
30
100
–75
71
78
100
+V
CC
40
3
T
T
T
T
T
T
T
T
T
–77
72
80
T
T
T
T
T
T
T
V
GΩ
µA
µA
µA
T
T
T
V
V
V
V
®
3
ADS7844
BURR-BROWN [ BURR-BROWN CORPORATION ]
