ADS7040 Datasheet, PDF (1/38 Pages) Texas Instruments – Ultra-Low Power, Ultra-Small Size, 8-Bit, 1-MSPS, SAR ADC

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ADS7040
SBAS676A – NOVEMBER 2014 – REVISED NOVEMBER 2014
ADS7040 Ultra-Low Power, Ultra-Small Size, 8-Bit, 1-MSPS, SAR ADC
1 Features
•1 Industry's First SAR ADC with Nanowatt Power
Consumption:
– 171 µW at 1 MSPS with 1.8-V AVDD
– 555 µW at 1 MSPS with 3-V AVDD
– 56 µW at 100 kSPS with 3-V AVDD
– Less than 1 µW at 1 kSPS with 3-V AVDD
• Industry's Smallest SAR ADC:
– X2QFN-8 Package with 2.25-mm² Footprint
• 1-MSPS Throughput with Zero Data Latency
• Wide Operating Range:
– AVDD: 1.8 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
– ±0.5-LSB (Max) INL, ±0.4-LSB (Max) DNL
– 49 dB SNR
– –70-dB THD
• Unipolar Input Range: 0 V to AVDD
• Integrated Offset Calibration
• SPI™-Compatible Serial Interface: 12 MHz
• JESD8-7A Compliant Digital I/O
2 Applications
• Low-Power Data Acquisition
• Battery-Powered Handheld Equipment
• Level Sensors
• Ultrasonic Flow Meters
• Motor Control
• Wearable Fitness
• Portable Medical Equipment
• Hard Drives
• Glucose Meters
3 Description
The ADS7040 is a 8-bit, 1-MSPS, analog-to-digital
converter (ADC). The device supports a wide analog
input voltage range (1.8 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 ADS7040 complies with the JESD8-
7A standard for a normal DVDD range (1.65 V to
1.95 V).
The ADS7040 is available in 8-pin, miniature, leaded,
and X2QFN packages and is specified for operation
from –40°C to 125°C. Miniature form-factor and
extremely low-power consumption make this device
suitable for space-constrained, battery-powered
applications.
PART NAME
ADS7040
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
X2QFN (8)
1.50 mm × 1.50 mm
VSSOP (8)
2.30 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
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VIN+
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Typical Application
OPA_AVDD
+
R
C
OPA_AVSS
AVDD _{AVDD used as}
Reference for device
AINP
AVDD
Device
AINM
GND
RUG (8)
1.5mm
1.5mm
Actual Device Size
1.5 x 1.5 x 0.35(H) mm
NOTE: The ADS7040 is smaller than a 0805 (2012 metric) SMD
component.
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.