PIN CONFIGURATION
PIN DESCRIPTIONS
PIN
DESIGNATOR DESCRIPTION
Top View
SSOP
1
2
GND
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
CLK
Ground
Data Bit 1 (D7) (MSB)
Data Bit 2 (D6)
3
GND
Bit 1 (MSB)
Bit 2
1
2
3
4
5
6
7
8
9
20 VDRV
19 +VS
4
Data Bit 3 (D5)
5
Data Bit 4 (D4)
6
Data Bit 5 (D3)
18 GND
17 IN
7
Data Bit 6 (D2)
8
Data Bit 7 (D1)
Bit 3
9
Data Bit 8 (D0) (LSB)
Convert Clock
Bit 4
16 IN
10
11
ADS831
RSEL
Input Range Select: HI = 2V; LO = 1V
Bit 5
15 CM
12
13
14
15
16
17
18
19
20
INT/EXT
REFB
REFT
CM
IN
IN
GND
+VS
VDRV
Reference Select: HI = External; LO = Internal
Bottom Reference
Top Reference
Common-Mode Voltage Output
Complementary Input
Analog Input
Ground
+5V Supply
Output Logic Driver Supply Voltage
Bit 6
14 REFT
13 REFB
12 INT/EXT
11 RSEL
Bit 7
Bit 8 (LSB)
CLK 10
TIMING DIAGRAM
N+2
N+1
N+4
N+3
tL
Analog In
N+7
N+5
N
N+6
tH
tD
tCONV
Clock
4 Clock Cycles
N–3 N–2
t2
Data Out
N–4
N–1
N
N+1
N+2
N+3
Data Invalid
t1
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
tCONV
tL
tH
tD
t1
Convert Clock Period
Clock Pulse Low
Clock Pulse High
Aperture Delay
12.5
5.8
5.8
100µs
ns
ns
ns
ns
ns
ns
6.25
6.25
3
Data Hold Time, CL = 0pF
New Data Delay Time, CL = 15pF max
3.9
t2
5.9
12
ADS831
4
SBAS087A
ETC [ ETC ]
