SPECIFICATIONS
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.
ADS7845E
PARAMETER
RESOLUTION
ANALOG INPUT
Full-Scale Input Span
Absolute Input Range
Capacitance
Leakage Current
SYSTEM PERFORMANCE
No Missing Codes
Integral Linearity Error
Offset Error
Gain Error
Noise
Power Supply Rejection Ratio
SAMPLING DYNAMICS
Conversion Time
Acquisition Time
Throughput Rate
Multiplexer Settling Time
Aperture Delay
Aperture Jitter
Channel-to-Channel Isolation
SWITCH DRIVERS
On-Resistance
UL, UR
LL, LR
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
(2)
f
SAMPLE
= 12.5kHz
Shutdown Mode with
DCLK = DIN = +V
CC
+V
CC
= +2.7V
–40
2.7
280
220
5.5
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
11
±2
±6
±4
30
70
12
3
125
500
30
100
100
Positive Input - Negative Input
Positive Input
Negative Input
0
–0.2
–0.2
25
0.1
CONDITIONS
MIN
TYP
12
V
REF
+V
CC
+0.2
+0.2
MAX
UNITS
Bits
V
V
V
pF
µA
Bits
LSB
(1)
LSB
LSB
µVrms
dB
Clk Cycles
Clk Cycles
kHz
ns
ns
ps
dB
V
IN
= 2.5Vp-p at 50kHz
7
7
+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, one LSB is 610µV. (2) ADS7845 will operate down to 2.0V.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
ADS7845
2
BURR-BROWN [ BURR-BROWN CORPORATION ]
