MAX1422 Просмотр технического описания (PDF) - Maxim Integrated
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MAX1422 Datasheet PDF : 15 Pages
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12-Bit, 20Msps, 3.3V, Low-Power ADC with
Internal Reference
Typical Operating Characteristics (continued)
(VAVDD = VDVDD = 3.3V, AGND = DGND = 0, VIN = ±1.024V, differential input drive, AIN = -0.5dBFS, fCLK = 20MHz (50% duty
cycle) digital output load CL = 10pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25 °C.)
GAIN ERROR vs. TEMPERATURE,
EXTERNAL REFERENCE (VREFIN = 2.048V)
0.5
0.2
ANALOG SUPPLY CURRENT
vs. TEMPERATURE
50
46
DIGITAL SUPPLY CURRENT
vs. TEMPERATURE
6
CL = 10pF
5
4
-0.1
42
3
-0.4
38
2
-0.7
34
1
-1.0
-40
-15
10
35
60
85
TEMPERATURE (°C)
30
-40 -15
10
35
60
85
TEMPERATURE (°C)
0
-40 -15
10
35
60
85
TEMPERATURE (°C)
SNR/SINAD, THD/SFDR
vs. CLOCK FREQUENCY
80
75
70
SNR
SFDR
THD
65
60
SINAD
55
50
45
40 fIN = 5MHz
5.0 7.5 10.0 12.5 15.0 17.5 20.0
CLOCK FREQUENCY (MHz)
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
2.10
2.08
2.06
2.04
2.02
2.00
-40 -15 10
35
60
85
TEMPERATURE (°C)
INTERNAL REFERENCE VOLTAGE
vs. ANALOG SUPPLY VOLTAGE
2.05
2.04
2.03
2.02
2.01
2.00
3.1
3.2
3.3
3.4
3.5
VDD (V)
OUTPUT NOISE HISTOGRAM (DC-INPUT)
30,000
27360
25,000
20,000
15,000
16623
15029
10,000
5000
3431
2596
22 310
0
162 2 1
N-4 N-3 N-2 N-1 N N+1 N+2 N+3 N+4 N+5
DIGITAL OUTPUT NOISE
_______________________________________________________________________________________ 7
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