Typical operating characteristics (continued) – Rainbow Electronics MAX1422 User Manual
Page 7
MAX1422
12-Bit, 20Msps, +3.3V, Low-Power ADC with
Internal Reference
_______________________________________________________________________________________
7
0.5
0.2
-0.1
-0.4
-0.7
-40
10
-15
35
60
85
GAIN ERROR vs. TEMPERATURE,
EXTERNAL REFERENCE (V
REFIN
= +2.048V)
MAX1422
toc19
TEMPERATURE (
°C)
GAIN ERROR (%FSR)
-1.0
50
46
42
38
34
-40
10
-15
35
60
85
ANALOG SUPPLY CURRENT
vs. TEMPERATURE
MAX1422
toc20
TEMPERATURE (
°C)
I
AVDD
(mA)
30
6
5
4
3
2
-40
10
-15
35
60
85
DIGITAL SUPPLY CURRENT
vs. TEMPERATURE
MAX1422
toc21
TEMPERATURE (
°C)
I
DVDD
(mA)
C
L
= 10pF
1
0
90
80
70
60
50
0
8
4
12
SFDR, SNR, THD, SINAD
vs. CLOCK FREQUENCY
MAX1422 toc22
CLOCK FREQUENCY (MHz)
SFDR, SNR, THD, SINAD (dB)
SINAD
SNR
SFDR
16
20
f
IN
= 5MHz
THD
2.05
2.04
2.03
2.02
2.01
3.1
3.3
3.2
3.4
INTERNAL REFERENCE VOLTAGE
vs. ANALOG SUPPLY VOLTAGE
MAX1422 toc23
V
DD
(V)
V
REF
(V)
3.5
2.00
2.00
2.02
2.06
2.04
2.08
2.10
-40
10
-15
35
60
85
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1422 toc24
TEMPERATURE (
°C)
V
REF
(V)
0
10,000
5000
20,000
15,000
25,000
30,000
N-1
N+2
OUTPUT NOISE HISTOGRAM (DC-INPUT)
MAX1422 toc25
DIGITAL OUTPUT NOISE
COUNTS
N-4 N-3
N N+1
N+3
27360
16623
3431
15029
162
22
1
2596
2
310
N-2
N+4 N+5
Typical Operating Characteristics (continued)
(V
AVDD
= V
DVDD
= +3.3V, AGND = DGND = 0, V
IN
= ±1.024V, differential input voltage, f
CLK
= 20MHz (50% duty cycle) digital
output load C
L
= 10pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25
°C.)