Agilent Technologies 93000 SOC Series User Manual

Lesson 1 – The Training ADC
296
Flash ADC Block Diagram
ADC Input-Output Chart
Linear ADCs have a transfer characteristic as shown below:
Input-Output Chart of an Ideal 3-bit ADC
FS = Full analog scale In case of a 3-bit ADC, as shown above, the analog equivalent to
1 LSB is 1/8 of the full analog scale (FS).
DeviceLSB = FS / 2
n
In general, the analog equivalent to 1 LSB is FS divided by 2
n
,
where n = number of bits. The analog equivalent to 1 LSB is also
called DeviceLSB.
Decode logic
Output register
n
n lines
2 -1
n
Analog
input
comparators
Sampling clock
R
R
R
R
–Vref
+Vref
Analog Input
Binary Output Code
1/4
1/2 FS
1/8
3/8
5/8
3/4
7/8
1 LSB
code
width
code
center
code transition
001
010
011
100
101
110
111
000

Agilent Technologies 93000 SOC Series Specifications

General

Brand	Agilent Technologies
Model	93000 SOC Series
Category	Test Equipment
Language	English