ADC71JG Burr-Brown Corporation, ADC71JG Datasheet - Page 4

• Manufacturer Part Number: ADC71JG
• Description: 16-bit Analog-to-digital Converter
• Manufacturer: Burr-Brown Corporation

FIGURE 1. ADC71 Timing Diagram.
FIGURE 2. Timing Relationship of Serial Data to Clock.
TABLE I. Input Voltages, Transition Values, LSB Values, and Code Definitions.
Binary (BIN)
Output
Analog Input
Voltage Range
Code
Designation
One Least
Significant
Bit (LSB)
Transition Values
MSB
000 ... 000
011 ... 111
111 ... 110
NOTES: (1) COB = Complementary Offset Binary. (2) Complementary Two’s Complement—obtained by inverting the most significant bit MSB (pin 1). (3) CSB
= Complementary Straight Binary. (4) Voltages given are the nominal value for transition to the code specified.
Serial
Clock
Out
Out
Convert Command
LSB
Serial Data Out
(4)
Internal Clock
Status (EOC)
NOTES: (1) The convert command must be at least 50ns wide and must remain low during a conversion. The conversion is initiated
by the “trailing edge” of the convert command. (2) 57 s for 16 bits.
®
ADC71
Bit 10
Bit 11
Bit 12
Bit 13
Bit 14
Bit 15
Bit 16
MBS
Bit 6
Bit 2
Bit 3
Bit 4
Bit 5
Bit 7
Bit 8
Bit 9
(1)
40-125ns
Defined As:
–Full Scale
+Full Scale
Mid Scale
n = 12
n = 13
n = 14
FSR
2
n
“0”
MSB
40-125ns
“0”
1
–10V +1/2LSB
+10V–3/2LSB
“1”
“1”
2
or CTC
4.88mV
2.44mV
1.22mV
COB
20V
10V
2
0
“1”
n
“0”
“1”
3
(1)
(2)
“0”
“0”
4
INPUT VOLTAGE RANGE AND LSB VALUES
–5V +1/2LSB
Maximum Throughput Time
+5V–3/2LSB
“0”
5
or CTC
2.44mV
1.22mV
COB
610 V
10V
2
Conversion Time
5V
0
n
“1”
“1”
6
(1)
(2)
4
“1”
“1”
FIGURE 3. Timing Relationship of Valid Data to Status.
7
–2.5V +1/2LSB
+2.5V–3/2LSB
“1”
“0”
“1”
8
or CTC
Bit 16
1.22mV
Status
COB
610 V
305 V
2.5V
5V
2
0
n
“0”
9
(1)
(2)
(2)
10
“1”
“1”
+10V–3/2LSB
“1”
“0”
11
“1”
0 +1/2LSB
0 to +10V
2.44mV
1.22mV
CSB
610 V
+5V
10V
2
n
12
“0”
(3)
40-125ns
“1”
“0”
“1”
13
+5V–3/2LSB
“0”
0 +1/2LSB
14
“0”
0 to +5V
1.22mV
CSB
610 V
305 V
+2.5V
5V
2
LSB
n
“0”
(3)
15
Bit 16
“1”
Valid
“1”
16
+20V–3/2LSB
0 +1/2LSB
0 to +20V
4.88mV
2.44mV
1.22mV
CSB
+10V
20V
2
n
(3)