ADS8883_14 Datasheet, PDF (4/49 Pages) Texas Instruments – 18-Bit, 680-kSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Analog-to-Digital Converter

ADS8883
SBAS567A – MAY 2013 – REVISED DECEMBER 2013
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
All minimum and maximum specifications are at T_A = –40°C to +85°C, AVDD = 3 V, DVDD = 3 V, V_REF = 5 V,
V_CM = V_REF / 2 V, and f_SAMPLE = 680 kSPS, unless otherwise noted.
Typical specifications are at T_A = +25°C, AVDD = 3 V, and DVDD = 3 V.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
DYNAMIC CHARACTERISTICS
SINAD Signal-to-noise + distortion⁽⁶⁾
SNR Signal-to-noise ratio⁽⁶⁾
THD Total harmonic distortion⁽⁶⁾⁽⁷⁾
SFDR Spurious-free dynamic range⁽⁶⁾
BW_–3dB –3-dB small-signal bandwidth
EXTERNAL REFERENCE INPUT
At 1 kHz, V_REF = 5 V
At 10 kHz, V_REF = 5 V
At 100 kHz, V_REF = 5 V
At 1 kHz, V_REF = 5 V
At 10 kHz, V_REF = 5 V
At 100 kHz, V_REF = 5 V
At 1 kHz, V_REF = 5 V
At 10 kHz, V_REF = 5 V
At , V_REF = 5 V
At 1 kHz, V_REF = 5 V
At 10 kHz, V_REF = 5 V
At 100 kHz, V_REF = 5 V
98
99.9
98.7
93.3
98.5
100
99.5
93.5
–115
–112
–102
115
112
102
30
V_REF Input range
2.5
5
Reference input current
During conversion, 680-kHz sample rate, mid-code
160
Reference leakage current
250
C_REF
Decoupling capacitor at the REF
input
10
22
POWER-SUPPLY REQUIREMENTS
Power-supply
voltage
AVDD
DVDD
Analog supply
Digital supply range
2.7
3
3.6
1.65
1.8
3.6
Supply current
AVDD
680-kHz sample rate, AVDD = 3 V
1.4
1.8
680-kHz sample rate, AVDD = 3 V
4.2
5.4
P_VA
Power dissipation
100-kHz sample rate, AVDD = 3 V
0.6
10-kHz sample rate, AVDD = 3 V
60
IA_PD
Device power-down current⁽⁸⁾
50
DIGITAL INPUTS: LOGIC FAMILY (CMOS)
V_IH
High-level input voltage
1.65 V < DVDD < 2.3 V
2.3 V < DVDD < 3.6 V
0.8 × DVDD
0.7 × DVDD
DVDD + 0.3
DVDD + 0.3
V_IL
Low-level input voltage
1.65 V < DVDD < 2.3 V
2.3 V < DVDD < 3.6 V
–0.3
0.2 × DVDD
–0.3
0.3 × DVDD
I_LK
Digital input leakage current
DIGITAL OUTPUTS: LOGIC FAMILY (CMOS)
±10
±100
V_OH
High-level output voltage
V_OL
Low-level output voltage
TEMPERATURE RANGE
I_O = 500-μA source, C_LOAD = 20 pF
I_O = 500-μA sink, C_LOAD = 20 pF
0.8 × DVDD
0
DVDD
0.2 × DVDD
T_A
Operating free-air temperature
–40
+85
UNIT
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
MHz
V
μA
nA
µF
V
V
mA
mW
mW
μW
nA
V
V
V
V
nA
V
V
°C
(6) All specifications expressed in decibels (dB) refer to the full-scale input (FSR) and are tested with an input signal 0.5 dB below full-scale,
unless otherwise specified.
(7) Calculated on the first nine harmonics of the input frequency.
(8) The device automatically enters a power-down state at the end of every conversion, and remains in power-down during the acquisition
phase.
4
Submit Documentation Feedback
Product Folder Links: ADS8883
Copyright © 2013, Texas Instruments Incorporated