EVAL-CONTROLBRD2 AD [Analog Devices], EVAL-CONTROLBRD2 Datasheet - Page 10

• Manufacturer Part Number: EVAL-CONTROLBRD2
• Description: Differential Input, 1MSPS, 12-Bit ADC in ?SO-8 and S0-8
• Manufacturer: AD [Analog Devices]

TPC 13 shows the change in Zero Code Error versus the
Reference Voltage for V
TPC 13. Change in Zero Code Error vs Reference Voltage
TPC 14 shows a histogram plot for 10000 conversions of
a dc input using the AD7450 with V
log inputs were set to V
code transition.
TPC 14. Histogram of 10000 conversions of a DC Input with
AD7450
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
1
0
2044
0.25
V
DD
= 5V and 3.3 V*
2045
0.75
Fs = 1MSPS
VDD = 5 V
DD
REF
2046
1.25
V
, which is the center of the
DD
= 5V and 3.3V.
10000 Codes
VREF
PRELIMINARY TECHNICAL DATA
= 5V
CODE
VDD = 3.3 V
Fs = 833kSPS
2047
1.75
DD
= 5V. Both ana-
2048
2.25
2.5
2049
–10–
TPC 15 shows a histogram plot for 10000 conversions of
a dc input for V
set to V
the majority of codes appear in one output bin.
TPC 16 shows the Effective Number of Bits (ENOB)
versus the Reference Voltage for V
that the AD7450 has an ENOB of greater than 8-bits typi-
cally when V
*See Reference Section.
TPC 15. Histogram of 10000 conversions of a DC Input with
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
12
11
10
2044
9
8
7
6
0
TPC 16. Change in ENOB vs Reference Voltage
REF
Fs = 1MSPS
VDD = 5V
Fs = 833kSPS
VDD = 3.3V
. Both plots indicate good noise performance as
REF
2045
0.5
DD
= 100mV.
71 Codes
V
of 3V. As in TPC 14, both inputs are
DD
= 5V and 3.3 V*
2046
V
9839 Codes
1
DD
CODE
= 3V
VREF
2047
DD
1.5
90 Codes
5V and 3.3V. Note
2048
2
REV. PrJ
2049
2.5