Rainbow Electronics MAX1422 - 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.)