ELECTRICAL CHARACTERISTICS
At T
A
= –40°C to +85°C, +V
CC
= +2.7V, V
REF
= 2.5V internal voltage, f
SAMPLE
= 125kHz, f
CLK
= 16 • f
SAMPLE
= 2MHz, 12-bit mode, and digital inputs = GND or +V
CC
,
unless otherwise noted.
ADS7846E
PARAMETER
ANALOG INPUT
Full-Scale Input Span
Absolute Input Range
Capacitance
Leakage Current
SYSTEM PERFORMANCE
Resolution
No Missing Codes
Integral Linearity Error
Offset Error
Gain Error
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–
Drive Current
(2)
REFERENCE OUTPUT
Internal Reference Voltage
Internal Reference Drift
Quiescent Current
REFERENCE INPUT
Range
Input Impedance
CONDITIONS
Positive Input-Negative Input
Positive Input
Negative Input
MIN
0
–0.2
–0.2
25
0.1
12
11
±2
±6
±4
70
70
12
3
125
500
30
100
100
TYP
MAX
V
REF
+V
CC
+ 0.2
+0.2
UNITS
V
V
V
pF
µA
Bits
Bits
LSB
(1)
LSB
LSB
µVrms
dB
CLK Cycles
CLK Cycles
kHz
ns
ns
ps
dB
External V
REF
Including Internal V
REF
V
IN
= 2.5Vp-p at 50kHz
5
6
Duration 100ms
2.45
2.50
15
500
50
2.55
Ω
Ω
mA
V
ppm/°C
µA
V
GΩ
Ω
1.0
SER/DFR = 0, PD1 = 0,
Internal Reference Off
Internal Reference On
0.5
10
1
External V
REF
= 2.5V
Internal Reference
–2
–3
–40
Differential Method
(3)
TEMP0
(4)
Differential Method
(3)
TEMP0
(4)
1.6
0.3
±2
±3
CMOS
| I
IH
|
≤
+5µA
| I
IL
|
≤
+5µA
I
OH
= –250µA
I
OL
= 250µA
T
A
= 0°C to +85°C, 50kΩ Pull-Up
Straight Binary
Specified Performance
Operating Range
Internal Reference Off
Internal Reference On
f
SAMPLE
= 12.5kHz
Power-Down Mode with
CS = DCLK = DIN = +V
CC
+V
CC
= +2.7V
2.7
2.2
280
780
220
+V
CC
• 0.7
–0.3
+V
CC
• 0.8
1
250
+V
CC
BATTERY MONITOR
Input Voltage Range
Input Impedance
Sampling Battery
Battery Monitor Off
Accuracy
TEMPERATURE MEASUREMENT
Temperature Range
Resolution
Accuracy
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(5)
Quiescent Current
6.0
V
kΩ
GΩ
%
%
°C
°C
°C
°C
°C
+2
+3
+85
+V
CC
+ 0.3
+0.8
0.4
0.8
V
V
V
V
3.6
5.25
650
3
1.8
–40
+85
V
V
µA
µA
µA
µA
mW
°C
Power Dissipation
TEMPERATURE RANGE
Specified Performance
NOTES: (1) LSB means least significant bit. With V
REF
equal to +2.5V, one LSB is 610µV. (2) Ensured by design, but not tested. Exceeding 50mA source current
may result in device degradation. (3) Difference between TEMP0 and TEMP1 measurement. No calibration necessary. (4) Temperature drift is –2.1mV/°C.
(5) ADS7846 operates down to 2.2V.
ADS7846
SBAS125H
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BURR-BROWN [ BURR-BROWN CORPORATION ]
