ADS7043 Datasheet, PDF (5/35 Pages) Texas Instruments – Ultra-Low Power, Ultra-Small Size, 12-Bit, 1-MSPS, SAR ADC

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ADS7043
SBAS681A – NOVEMBER 2014 – REVISED NOVEMBER 2014
6.5 Electrical Characteristics
At T_A = –40°C to 125°C, AVDD = 3 V, DVDD = 1.65 V to 3.6 V, f_SAMPLE = 1 MSPS, unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
ANALOG INPUT
Full-scale input voltage span
–AVDD / 2
AVDD / 2
Absolute input
voltage range
AINP to GND
AINM to GND
–0.1
AVDD / 2–0.1
AVDD + 0.1
AVDD / 2 + 0.1
C_S
Sampling capacitance
15
SYSTEM PERFORMANCE
Resolution
12
NMC
No missing codes
12
INL
Integral nonlinearity
AVDD = 3 V
AVDD = 1.8 V
–1
±0.7
1
–2
±1
2
DNL
Differential nonlinearity
AVDD = 3 V
AVDD = 1.8 V
–0.99
±0.5
1
–0.99
±0.7
2
Uncalibrated offset error
AVDD = 1.8 V to 3.6 V
±12
E_O
Calibrated offset error
AVDD = 3 V
AVDD = 1.8 V
–3
±0.5
3
–4
±1
4
dV_OS/dT
E_G
Offset error drift with temperature
Gain error
AVDD = 3 V
AVDD = 1.8 V
5
–0.1
±0.05
0.1
–0.2
±0.1
0.2
Gain error drift with temperature
2
SAMPLING DYNAMICS
t_ACQ
Acquisition time
200
Maximum throughput rate
16-MHz SCLK, AVDD = 1.8 V to 3.6 V
1
DYNAMIC CHARACTERISTICS
SNR
Signal-to-noise ratio
THD
Total harmonic distortion
SINAD
Signal-to-noise and distortion
SFDR
Spurious-free dynamic range
BW_(fp)
Full-power bandwidth
DIGITAL INPUT/OUTPUT (CMOS Logic Family)
f_IN = 2 kHz, AVDD = 3 V
f_IN = 2 kHz, AVDD = 1.8 V
f_IN = 2 kHz, AVDD = 3 V
f_IN = 2 kHz, AVDD = 3 V
f_IN = 2 kHz, AVDD = 1.8 V
f_IN = 2 kHz, AVDD = 3 V
At –3 dB, AVDD = 3 V
69
70
68
–80
68
69.5
67.5
85
25
V_IH
High-level input voltage
V_IL
Low-level input voltage
V_OH
High-level output voltage
V_OL
Low-level output voltage
POWER-SUPPLY REQUIREMENTS
At I_source = 500 µA
At I_source = 2 mA
At I_sink = 500 µA
At I_sink = 2 mA
0.65 DVDD
–0.3
0.8 DVDD
DVDD – 0.45
0
0
DVDD + 0.3
0.35 DVDD
DVDD
DVDD
0.2 DVDD
0.45
AVDD
Analog supply voltage
1.8
3
3.6
DVDD
Digital I/O supply voltage
1.65
3
3.6
At 1 MSPS with AVDD = 3 V
260
I_AVDD
Analog supply current
At 100 kSPS with AVDD = 3 V
At 1 MSPS with AVDD = 1.8 V
26
135
At 1 MSPS with AVDD = 3 V
780
P_D
Power dissipation
At 100 kSPS with AVDD = 3 V
At 1 MSPS with AVDD = 1.8 V
78
243
UNIT
V
V
V
pF
Bits
Bits
LSB
LSB
LSB
LSB
LSB
LSB
LSB
ppm/°C
%FS
%FS
ppm/°C
ns
MHz
dB
dB
dB
dB
dB
dB
MHz
V
V
V
V
V
V
V
V
µA
µA
µA
µW
µW
µW
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