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Número de pieza ADS7029-Q1
Descripción SAR ADC
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ADS7029-Q1
SBAS811 – JANUARY 2017
ADS7029-Q1 Small-Size, Low-Power, 8-Bit, 2-MSPS, SAR ADC
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level ±2000 V
– Device CDM ESD Classification Level ±1000 V
• Ultra-Low Power Consumption:
– 1.11 mW (max) at 2 MSPS with 3-V AVDD
– Less Than 1 µW at 1 kSPS with 3-V AVDD
• Miniature Footprint:
– 8-Pin VSSOP Package: 2.30 mm × 2.00 mm
• 2-MSPS Throughput with Zero Data Latency
• Wide Operating Range:
– AVDD: 2.35 V to 3.6 V
– DVDD: 1.65 V to 3.6 V (Independent of AVDD)
– Temperature Range: –40°C to +125°C
• Excellent Performance:
– 8-Bit Resolution with NMC
– ±0.2 LSB DNL; ±0.25 LSB INL
– 49-dB SNR with 3-V AVDD
– –70-dB THD with 3-V AVDD
• Unipolar Input Range: 0 V to AVDD
• Integrated Offset Calibration
• SPI-Compatible Serial Interface: 32 MHz
• JESD8-7A Compliant Digital I/O
2 Applications
• Automotive Infotainment
• Automotive Sensors
• Level Sensors
• Ultrasonic Flow Meters
• Motor Control
• Portable Medical Equipment
3 Description
The ADS7029-Q1 device is a an automotive Q100-
qualified, 8-bit, 2-MSPS, analog-to-digital converter
(ADC). The device supports a wide analog input
voltage range (2.35 V to 3.6 V) and includes a
capacitor-based, successive-approximation register
(SAR) ADC with an inherent sample-and-hold circuit.
The SPI-compatible serial interface is controlled by
the CS and SCLK signals. The input signal is
sampled with the CS falling edge and SCLK is used
for conversion and serial data output. The device
supports a wide digital supply range (1.65 V to 3.6 V),
enabling direct interface to a variety of host
controllers. The ADS7029-Q1 complies with the
JESD8-7A standard for a normal DVDD range
(1.65 V to 1.95 V).
The ADS7029-Q1 is available in an 8-pin, miniature,
VSSOP package and is specified for operation from
–40°C to +125°C. The fast sampling rate of the
ADS7029-Q1, along with miniature form-factor and
low-power consumption, makes this device suitable
for space-constrained and fast-scanning automotive
applications.
PART NAME
ADS7029-Q1
Device Information(1)
PACKAGE
BODY SIZE (NOM)
VSSOP (8)
2.30 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
VIN+
+
±
Typical Application
OPA_AVDD
+R
AINP
AVDD AVDD used as
Reference for device
AVDD
ADS7029-Q1
C
AINM
GND
OPA_AVSS
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

1 page




ADS7029-Q1 pdf
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ADS7029-Q1
SBAS811 – JANUARY 2017
6.5 Electrical Characteristics
at TA = –40°C to 125°C, AVDD = 3 V, DVDD = 1.65 V to 3.6 V, fSAMPLE = 2 MSPS, and VAINM = 0 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP
MAX UNIT
ANALOG INPUT
Full-scale input voltage span(1)
0
AVDD
V
Absolute input
voltage range
AINP to GND
AINM to GND
–0.1
–0.1
AVDD + 0.1
0.1
V
CS Sampling capacitance
SYSTEM PERFORMANCE
15 pF
Resolution
8 Bits
NMC
INL
No missing codes
Integral nonlinearity
AVDD = 3 V
8
–0.5
±0.25
Bits
0.5 LSB(2)
DNL
Differential nonlinearity
AVDD = 3 V
–0.4
±0.2
0.4 LSB
EO
dVOS/dT
EG
Offset error
Offset error drift with temperature
Gain error
Gain error drift with temperature
AVDD = 3 V
No calibration
±0.5
±25
±0.2
±25
LSB
ppm/°C
%FS
ppm/°C
SAMPLING DYNAMICS
tACQ Acquisition time
Maximum throughput rate
32-MHz SCLK, AVDD = 2.35 V to 3.6 V
120
ns
2 MHz
DYNAMIC CHARACTERISTICS
SNR
Signal-to-noise ratio(3)
THD
Total harmonic distortion(3)(4)
SINAD
Signal-to-noise and distortion(3)
SFDR
Spurious-free dynamic range(3)
BW(fp)
Full-power bandwidth
DIGITAL INPUT/OUTPUT (CMOS Logic Family)
VIH High-level input voltage(5)
VIL Low-level input voltage(5)
VOH High-level output voltage(5)
VOL Low-level output voltage(5)
POWER-SUPPLY REQUIREMENTS
fIN = 2 kHz, AVDD = 3 V
fIN = 2 kHz, AVDD = 3 V
fIN = 2 kHz, AVDD = 3 V
fIN = 2 kHz, AVDD = 3 V
At –3 dB, AVDD = 3 V
At Isource = 500 µA
At Isource = 2 mA
At Isink = 500 µA
At Isink = 2 mA
48.5
48.5
0.65 × DVDD
–0.3
0.8 × DVDD
DVDD – 0.45
0
0
49 dB
–70 dB
49 dB
75 dB
25 MHz
DVDD + 0.3
0.35 × DVDD
DVDD
DVDD
0.2 × DVDD
0.45
V
V
V
V
AVDD
Analog supply voltage
2.35
3
3.6 V
DVDD
Digital I/O supply voltage
1.65
3
3.6 V
IAVDD
IDVDD
PD
Analog supply current
Digital supply current
Power dissipation
At 2 MSPS with AVDD = 3 V
AVDD = 3 V, no load, no transitions
At 2 MSPS with AVDD = 3 V
335
10
1.005
370
1.11
µA
µA
mW
(1) Ideal input span; does not include gain or offset error.
(2) LSB means least significant bit.
(3) 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.
(4) Calculated on the first nine harmonics of the input frequency.
(5) Digital voltage levels comply with the JESD8-7A standard for DVDD from 1.65 V to 1.95 V; see the Digital Voltage Levels section for
more details.
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: ADS7029-Q1
Submit Documentation Feedback
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ADS7029-Q1 arduino
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ADS7029-Q1
SBAS811 – JANUARY 2017
Typical Characteristics (continued)
at TA = 25°C, AVDD = 3 V, DVDD = 1.8 V, and fSAMPLE = 2 MSPS (unless otherwise noted)
50 50
49.8 49.75
49.6
49.5
49.4
49.2 49.25
49 49
48.8 48.75
48.6
48.5
48.4
48.2 48.25
48
0
500
1000
1500
2000
Sampling rate (kSPS)
D030
AVDD = DVDD = 3.3 V
48
0
500
1000
1500
Sampling rate (kSPS)
AVDD = DVDD = 3.3 V
Figure 26. SNR vs Sampling Rate
-72
Figure 27. SINAD vs Sampling Rate
2000
D031
-71.5
-71
-70.5
-70
0
500
1000
1500
Sampling rate (kSPS)
AVDD = DVDD = 3.3 V
Figure 28. THD vs Sampling Rate
2000
D032
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: ADS7029-Q1
Submit Documentation Feedback
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