AVDD

OPA_AVDD

AINP

AINM

GND

AVDD

Device

OPA_AVSS

+

R

C

+

±

Actual Device Size

1.5 x 1.5 x 0.35(H) mm

1.5

mm

1.5

m

m

RUG (8)

AVDD used as

Reference for device

AVDD/2

R

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Reference

Design

ADS7043

SBAS681D – NOVEMBER 2014 – REVISED DECEMBER 2015

ADS7043 Ultra-Low Power, Ultra-Small Size, 12-Bit, 1-MSPS, SAR ADC

1 Features

3 Description

The

ADS7043

is

a

1-MSPS,

analog-to-digital

1

•

Industry's First SAR ADC with Nanowatt Power

converter (ADC). The device supports a wide analog

Consumption:

input voltage range (±0.825 V to ±1.8 V) and includes

–

243 µW at 1 MSPS with 1.8-V AVDD

a capacitor-based, successive-approximation register

–

780 µW at 1 MSPS with 3-V AVDD

(SAR) ADC with an inherent sample-and-hold circuit.

The SPI-compatible serial interface is controlled by

–

78 µW at 100 kSPS with 3-V AVDD

the CS and SCLK signals. The input signal is

–

Less than 1 µW at 1 kSPS with 3-V AVDD

sampled with the CS falling edge and SCLK is used

•

Industry's Smallest SAR ADC:

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

•

1-MSPS Throughput with Zero Data Latency

controllers. The device complies with the JESD8-7A

•

Wide Operating Range:

standard for normal DVDD range (1.65 V to 1.95 V).

–

AVDD: 1.65 V to 3.6 V

The device is available in 8-pin, miniature, leaded,

–

DVDD: 1.65 V to 3.6 V (Independent of AVDD)

and X2QFN packages and is specified for operation

from –40°C to 125°C. Miniature form-factor and

–

Temperature Range: –40°C to 125°C

extremely low-power consumption make this device

•

Excellent Performance:

suitable

for

space-constrained,

battery-powered

–

12-Bit Resolution with NMC

applications.

–

±1-LSB (Max) DNL and INL

Device Information(1)

–

70-dB SNR with 3-V AVDD

PART NAME

PACKAGE

BODY SIZE (NOM)

–

–80-dB THD with 3-V AVDD

X2QFN (8)

1.50 mm × 1.50 mm

•

Unipolar, Pseudo-Differential Input Range:

ADS7043

VSSOP (8)

2.30 mm × 2.00 mm

–AVDD / 2 to AVDD / 2

(1) For all available packages, see the orderable addendum at

•

Integrated Offset Calibration

the end of the datasheet.

•

SPI™-Compatible Serial Interface: 16 MHz

space

•

JESD8-7A Compliant Digital I/O

space

2 Applications

space

•

Low-Power Data Acquisition

Typical Application

•

Battery-Powered Handheld Equipment

•

Level Sensors

•

Ultrasonic Flow Meters

•

Motor Controls

•

Wearable Fitness

•

Portable Medical Equipment

•

Hard Drives

•

Glucose Meters

NOTE: The device 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.