ADS901 Datasheet, PDF (4/11 Pages) Burr-Brown (TI) – 10-Bit, 20MHz, +3V Supply ANALOG-TO-DIGITAL CONVERTER

PIN CONFIGURATION
TOP VIEW
SSOP
+V_S 1
LV_DD 2
(LSB) Bit 10 3
Bit 9 4
Bit 8 5
Bit 7 6
Bit 6 7
Bit 5 8
Bit 4 9
Bit 3 10
Bit 2 11
(MSB) Bit 1 12
GND 13
GND 14
ADS901
28 +V_S
27 IN
26 CM
25 LnBy
24 REFB
23 NC
22 REFT
21 LpBy
20 GND
19 GND
18 +V_S
17 Pwrdn
16 OE
15 CLK
PIN DESCRIPTIONS
PIN
DESIGNATOR
1
+V_S
2
LV_DD
3
Bit 10
4
Bit 9
5
Bit 8
6
Bit 7
7
Bit 6
8
Bit 5
9
Bit 4
10
Bit 3
11
Bit 2
12
Bit 1
13
GND
14
GND
15
CLK
16
OE
17
Pwrdn
18
+V_S
19
GND
20
GND
21
LpBy
22
REFT
23
NC
24
REFB
25
LnBy
26
CM
27
IN
28
+V_S
DESCRIPTION
Analog Supply
Output Logic Driver Supply Voltage
Data Bit 10 (D0) (LSB)
Data Bit 9 (D1)
Data Bit 8 (D2)
Data Bit 7 (D3)
Data Bit 6 (D4)
Data Bit 5 (D5)
Data Bit 4 (D6)
Data Bit 3 (D7)
Data Bit 2 (D8)
Data Bit 1 (D9) (MSB)
Analog Ground
Analog Ground
Convert Clock Input
Output Enable, Active Low
Power Down Pin
Analog Supply
Analog Ground
Analog Ground
Positive Ladder Bypass
Top Reference Input
No Connection
Bottom Reference Input
Negative Ladder Bypass
Common-Mode Voltage Output
Analog Input
Analog Supply
TIMING DIAGRAM
Analog In _N
N+1
N+2
N+3
N+4
N+5
N+6
N+7
Clock
t_D
t_CONV
t_L t_H
Data Out
5 Clock Cycles
t₂
N–5
N–4
N–3
N–2
N–1
N
Data Invalid
t₁
N+1
N+2
SYMBOL
DESCRIPTION
MIN
TYP
MAX UNITS
t_CONV
t_L
t_H
t_D
t₁
t₂
Convert Clock Period
50
Clock Pulse Low
24
Clock Pulse High
24
Aperture Delay
Data Hold Time, C_L = 0pF
3.9
New Data Delay Time, C_L = 15pF max
100µs
ns
25
ns
25
ns
3
ns
ns
12
ns
®
ADS901
4