ISO806 Datasheet, PDF (4/12 Pages) Burr-Brown (TI) – Isolated 12-Bit Sampling ANALOG-TO-DIGITAL CONVERTER

PIN #
NAME
DIGITAL
I/O
DESCRIPTION
1
RC
I
2
BUSY
O
3
+5V_DIG2
10
+5V_DIG1
11
+5V_ANA
12
R1_IN
13
NC
14
R2_IN
15
CAP
16
REF
17
AGND
18 SB/BTC
I
19
DGND1
26
DGND2
27 DATACLK
O
28
SDATA
O
Read/Convert. With BUSY high, a falling edge on R/C initiates a new conversion.
At the start of conversion BUSY goes LOW and stays LOW until conversion is complete.
Isolated Digital Supply Volts.
Digital Supply Volts.
Analog Supply Volts.
Analog Input.
No Connection. Leave unconnected.
Analog Input.
Reference Buffer Output. 2.2µF tantalum capacitor to ground.
Reference Input/Output. 2.2µF tantalum capacitor to ground.
Analog Ground.
Selects Straight Binary or Binary Two’s Complement for Output Data Format.
Digital Ground.
Isolated Ground.
Data Clock Output.
Serial Output Synchronized to DATACLK.
TABLE I. Pin Assignments.
PIN CONFIGURATION
R/C 1
BUSY 2
+5V_DIG2 3
28 SDATA
27 DATACLK
26 DGND2
ANALOG
INPUT
RANGE
±10V
0V to 5V
0V to 4V
CONNECT R1_IN
VIA 200Ω
TO
V_IN
AGND
V_IN
CONNECT R2_IN
VIA 100Ω
TO
CAP
V_IN
V_IN
IMPEDANCE
45.7kΩ
20.0kΩ
21.4kΩ
TABLE II. Input Range Connections. See also Figure 3.
ISO806
+5V_DIG1 10
+5V_ANA 11
R1_IN 12
NC 13
R2_IN 14
19 DGND1
18 SB/BTC
17 AGND
16 REF
15 CAP
R/C BUSY DATACLK OPERATION
↓
1
Output Initiates conversion “n”. Valid data from conversion “n-1” clocked out on SDATA.
0
↑
X
New conversion initiated without acquisition of a new signal. Data will be invalid. R/C must be HIGH when BUSY goes HIGH.
X
0
X
New convert commands ignored. Conversion “n” in progress.
TABLE III. Control Functions
®
ISO806
4