16-Bit Latchup Protected Analog to Digital Converter
7809LP
TABLE 12. 7809LP CONTROL LINE FUNCTIONS FOR READ AND CONVERT
DATACL
SPECIFIC FUNCTION
CS
R/C
BUSY EXT/INT
PWRD SB/BTC OPERATION
K
Selecting Output
Format
x
x
x
x
x
x
x
x
x
0
3
Serial data is output in
Binary Two’s Comple-
ment format.
x
x
x
1
Serial data is output in
Straight Binary format.
1. See Figure 4 for constraints on previous data valid during conversion.
TABLE 13. 7809LP INPUT RANGE CONNECTION
CONNECT R1IN VIA 200Ω CONNECT R2IN VIA 100Ω
CONNECT R3IN TO
ANALOG INPUT RANGE
IMPEDANCE
TO
TO
±10V
±5V
V
AGND
CAP
CAP
22.9 kΩ
13.3 kΩ
10.7 kΩ
13.3kΩ
10.0 kΩ
10.7 kΩ
IN
AGND
V
IN
±3.3V
V
V
CAP
IN
IN
0V to 10V
0V to 5V
0V to 4V
AGND
AGND
V
AGND
IN
AGND
AGND
V
IN
V
V
IN
IN
TABLE 14. 7809LP CONVERSION AND DATA TIMING
(T = -40 °C TO 85 °C UNLESS OTHERWISE SPECIFIED)
A
SYMBOL
DESCRIPTION
SUBGROUPS
MIN
TYP
MAX
UNIT
t1
t2
Convert Pulse Width
BUSY Delay
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
40
--
--
--
6000
65
8
ns
ns
µs
ns
ns
µs
µs
µs
ns
ns
ns
ns
t3
BUSY LOW
--
--
t4
BUSY Delay after End of Conversion
Aperture Delay
--
220
40
7.6
--
--
t5
--
--
t6
Conversion Time
--
8
t7
Acquisition Time
--
2
t6 + t7
t8
Throughput Time
--
9
10
--
R/C Low to DATACLK Delay
DATACLK Period
--
450
440
75
125
t9
--
--
t10
t11
Data Valid to DATACLK HIGH Delay
20
100
--
Data Valid after DATACLK LOW
Delay
--
t12
External DATACLK
9, 10, 11
100
--
--
ns
01.11.05 Rev 7
All data sheets are subject to change without notice
8
©2005 Maxwell Technologies
All rights reserved.
MAXWELL [ MAXWELL TECHNOLOGIES ]
