Datasheet

ADS5421
4
SBAS237E
www.ti.com
1+V
SA
Analog Supply Voltage
2+V
SA
Analog Supply Voltage
3+V
SD
Digital Supply Voltage
4+V
SD
Digital Supply Voltage
5+V
SD
Digital Supply Voltage
6+V
SD
Digital Supply Voltage
7 GND Ground
8 GND Ground
9 I CLK Clock Input
10 I CLK Complementary Clock Input
11 GND Ground
12 GND Ground
13 GNDRV Ground
14 GNDRV Ground
15 DNC Do Not Connect
16 DV Data Valid Pulse: HI = Data Valid
17 O B1 Data Bit 1 (D13) (MSB)
18 O B2 Data Bit 2 (D12)
19 O B3 Data Bit 3 (D11)
20 O B4 Data Bit 4 (D10)
21 O B5 Data Bit 5 (D9)
22 O B6 Data Bit 6 (D8)
23 O B7 Data Bit 7 (D7)
24 O B8 Data Bit 8 (D6)
25 O B9 Data Bit 9 (D5)
26 O B10 Data Bit 10 (D4)
27 O B11 Data Bit 11 (D3)
28 O B12 Data Bit 12 (D2)
29 O B13 Data Bit 13 (D1)
30 O B14 Data Bit 14 (D0) (LSB)
31 NC No Internal Connection
32 NC No Internal Connection
33 VDRV Output Driver Supply Voltage
34 VDRV Output Driver Supply Voltage
35 VDRV Output Driver Supply Voltage
36 GNDRV Ground
37 GNDRV Ground
38 GNDRV Ground
39 OE Output Enable: HI = High Impedance
40 I PD
Power Down: HI = Power Down; LO = Normal
41 I BTC HI = Binary Twos Complement
42 GND Ground
43 GND Ground
44 SEL2 Reference Select 2: See Table on Page 5
45 SEL1 Reference Select 1: See Table on Page 5
46 V
REF
Internal Reference Voltage
47 GND Ground
48 GND Ground
49 GND Ground
50 REFB Bottom Reference Voltage Bypass
51 CM Common-Mode Voltage (Midscale)
52 REFT Top Reference Voltage Bypass
53 GND Ground
54 GND Ground
55 GND Ground
56 GND Ground
57 I IN Complementary Analog Input
58 GND Ground
59 I IN Analog Input
60 GND Ground
61 REFBY Reference Bypass
62 GND Ground
63 +V
SA
Analog Supply Voltage
64 +V
SA
Analog Supply Voltage
PIN I/O DESIGNATOR DESCRIPTION PIN I/O DESIGNATOR DESCRIPTION
PIN DESCRIPTIONS
PIN CONFIGURATION
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
GND
GND
V
REF
SEL1
SEL2
GND
GND
BTC
PD
OE
GNDRV
GNDRV
GNDRV
VDRV
VDRV
VDRV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
+V
SA
+V
SA
+V
SD
+V
SD
+V
SD
+V
SD
GND
GND
CLK
CLK
GND
GND
GNDRV
GNDRV
DNC
DV
+V
SA
+V
SA
GND
REFBY
GND
IN
GND
IN
GND
GND
GND
GND
REFT
CM
REFB
GND
B1 (MSB)
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14 (LSB)
NC
NC
64 63 62 61 60 59 58 57 56 55 54
17 18 19 20 21 22 23 24 25 26 27
53 52 51 50 49
28 29 30 31 32
ADS5421Y
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