ADS7887M_14 Datasheet, PDF (7/19 Pages) Texas Instruments – 10-BIT 1.25-MSPS MICRO-POWER MINIATURE SAR ANALOG-TO-DIGITAL CONVERTER

ADS7887M
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SUPPLY CURRENT
vs
SUPPLY VOLTAGE
1.8
1.7
f_s = 1.25 MSPS,
f_SCLK = 25 MHz
1.6
255C
1.5
1255C
1.4
1.3
−405C
1.2
1.1
1
2.35
3.075
3.8
4.525
V_DD − Supply Voltage − V
Figure 4.
TYPICAL CHARACTERISTICS
SUPPLY CURRENT
vs
SCLK FREQUENCY
1.80
T_A = 255C
1.60
1.40
5 V V_DD
1.20
1
0.80
2.35 V V_DD
0.60
0.40
0.20
5.25
0
0
5
10
15
20
25
f_SCLK − SCLK Frequency − MHz
Figure 5.
ANALOG INPUT
LEAKAGE CURRENT
vs
FREE-AIR TEMPERATURE
30
20
10
@ 5 V Input
0
−10
−20
@ 0 V Input
−30
−40
−40 −20
0 20 40 60 80 100 120
TA − Free-Air Temperature − 5C
Figure 7.
SIGNAL-TO-NOISE
AND DISTORTION
vs
INPUT FREQUENCY
61.9
61.7
f_s = 1.25 MSPS,
T_A = 255C,
V_DD = 5 V
61.5
61.3
61.1
60.9
60.7
60.5
1
10
100
f_i − Input Frequency − kHz
1000
Figure 8.
TOTAL HARMONIC DISTORTION
vs
INPUT FREQUENCY
−80
f_s = 1.25 MSPS,
−81 ^TA ^{= 255C,}
V_DD = 5 V
−82
−83
−84
−85
−86
−87
−88
−89
−90
1
10
100
f_i − Input Frequency − kHz
Figure 10.
TOTAL HARMONIC DISTORTION
vs
SUPPLY VOLTAGE
−80
f_s = 1.25 MSPS,
−81 f_i = 100 kHz,
T_A = 255C
−82
−83
−84
−85
−86
−87
−88
−89
−90
2.35
3.075
3.8
4.525
5.25
V_DD − Supply Voltage − V
Figure 11.
SLAS750A – JUNE 2011 – REVISED JUNE 2011
SUPPLY CURRENT
vs
SAMPLE RATE
1.4
V_DD = 5 V,
f_SCLK = 25 MHz,
1.2 T_A = 255C,
Power Down SCLK = Free Running
1
0.8
0.6
0.4
0.2
0
0 50 100 150 200 250 300 350 400 450
f_s − Sample Rate − KSPS
Figure 6.
SIGNAL-TO-NOISE
AND DISTORTION
vs
SUPPLY VOLTAGE
62
61.9
61.8
f_s = 1.25 MSPS,
f_i = 100 kHz,
T_A = 255C
61.7
61.6
61.5
61.4
61.3
61.2
61.1
61
2.35
3.075
3.8
4.525
5.25
V_DD − Supply Voltage − V
Figure 9.
SPURIOUS FREE DYNAMIC RANGE
vs
INPUT FREQUENCY
85
84.5
84
f_s = 1.25 MSPS,
T_A = 255C,
V_DD = 5 V
83.5
83
82.5
82
81.5
81
80.5
80
1
10
100
f_i − Input Frequency − kHz
Figure 12.
Copyright © 2011, Texas Instruments Incorporated
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