MAX1185_11 Datasheet, PDF (6/21 Pages) Maxim Integrated Products – Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with
Internal Reference and Multiplexed Parallel Outputs
Typical Operating Characteristics
(V_DD = 3V, OV_DD = 2.5V, V_REFIN = 2.048V, differential input at -0.5dBFS, f_CLK = 20MHz, C_L ≈ 10pF, T_A = +25°C, unless otherwise noted.)
FFT PLOT CHA (DIFFERENTIAL INPUT,
8192-POINT DATA RECORD)
0
-10
f_CLK = 20.0005678MHz
f_INA = 5.9742906MHz
CHA
-20 ^{fINB = 7.5343935MHz}
A_INA = -0.525dBFS
-30
-40
-50
-60 ^HD3
-70
HD2
-80
-90
-100
0
1 2 3 4 5 6 7 8 9 10
ANALOG INPUT FREQUENCY (MHz)
FFT PLOT CHB (DIFFERENTIAL INPUT,
8192-POINT DATA RECORD)
0
-10
f_CLK = 20.0005678MHz
f_INA = 7.5343935MHz
CHB
-20 ^fINB ^{= 11.9852035MHz}
A_INA = -0.471dBFS
-30
-40
-50
-60
HD3
-70
HD2
-80
-90
-100
0
1 2 3 4 5 6 7 8 9 10
ANALOG INPUT FREQUENCY (MHz)
SIGNAL-TO-NOISE AND DISTORTION
vs. ANALOG INPUT FREQUENCY
62
60
CHB
58
CHA
56
54
0
5 10 15 20 25 30 35 40 45
ANALOG INPUT FREQUENCY (MHz)
FFT PLOT CHB (DIFFERENTIAL INPUT,
8192-POINT DATA RECORD)
0
-10
f_CLK = 20.0005678MHz
f_INA = 5.9742906MHz
CHB
-20 ^fINB ^{= 7.5243935MHz}
A_INA = -0.462dBFS
-30
-40
-50
-60
HD3
-70
HD2
-80
-90
-100
0
1 2 3 4 5 6 7 8 9 10
ANALOG INPUT FREQUENCY (MHz)
TWO-TONE IMD PLOT (DIFFERENTIAL INPUT,
8192-POINT DATA RECORD)
0
-10
f_CLK = 20.0005678MHz
f_IN1 = 11.9852035MHz
-20 ^fIN2 ^{= 12.8934324MHz}
-30 ^{AIN = -6.5dBFS}
f_IN1
-40
-50
f_IN2
-60
-70
IM2
IM3
IM3
-80
-90
-100
0
1 2 3 4 5 6 7 8 9 10
ANALOG INPUT FREQUENCY (MHz)
TOTAL HARMONIC DISTORTION
vs. ANALOG INPUT FREQUENCY
-60
-64
CHA
-68
-72
CHB
-76
-80
0
5 10 15 20 25 30 35 40 45
ANALOG INPUT FREQUENCY (MHz)
FFT PLOT CHA (DIFFERENTIAL INPUT,
8192-POINT DATA RECORD)
0
-10
f_CLK = 20.0005678MHz
f_INA = 7.5343935MHz
CHA
-20 ^fINB ^{= 11.9852035MHz}
A_INA = -0.489dBFS
-30
-40
-50
-60
HD3
-70
HD2
-80
-90
-100
0
1 2 3 4 5 6 7 8 9 10
ANALOG INPUT FREQUENCY (MHz)
SIGNAL-TO-NOISE RATIO
vs. ANALOG INPUT FREQUENCY
61
60
CHB
59
58
CHA
57
56
55
0
5 10 15 20 25 30 35 40 45
ANALOG INPUT FREQUENCY (MHz)
SPURIOUS-FREE DYNAMIC RANGE
vs. ANALOG INPUT FREQUENCY
80
76
CHB
72
68
CHA
64
60
0
5 10 15 20 25 30 35 40 45
ANALOG INPUT FREQUENCY (MHz)
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