MAX11253 Datasheet, PDF (1/51 Pages) Maxim Integrated Products – Longer Battery Life for Portable Applications

MAX11253
EVALUATION KIT AVAILABLE
16-Bit, 6-Channel, 64ksps, 6.2nV/√Hz PGA,
Delta-Sigma ADC with SPI Interface
General Description
The MAX11253 is a 6-channel, 16-bit delta-sigma ADC
that achieves exceptional performance while consuming
very low power. Sample rates up to 64ksps allow preci-
sion DC measurements. The MAX11253 communicates
via a SPI serial interface and is available in a small (5mm
x 5mm) TQFN package.
The MAX11253 offers a 6.2nV/√Hz noise programmable
gain amplifier (PGA) with gain settings from 1x to 128x.
The integrated PGA provides isolation of the signal inputs
from the switched capacitor sampling network. The PGA
also enables the MAX11253 to interface directly with
high-impedance sources without compromising available
dynamic range.
The MAX11253 operates from a single 2.7V to 3.6V
analog supply, or split ±1.8V analog supplies, allowing
the analog input to be sampled below ground. The digital
supply range is 1.7V to 2.0V or 2.0V to 3.6V, allowing
communication with 1.8V, 2.5V, 3V, or 3.3V logic.
Applications
●● Analog I/O for Programmable Logic Controllers
●● Weigh Scales
●● Pressure Sensors
●● Battery-Powered Instrumentation
Typical Application Circuit
10nF
Benefits and Features
●● High Resolution for Industrial Applications that
Require a Wide Dynamic Range
• 98dB SNR at 1000sps
●● Longer Battery Life for Portable Applications
• 2.2mA Operating Mode Current
• 1μA Sleep Current
●● Single or Split Analog Supplies Provide Input Voltage
Range Flexibility
• 2.7V to 3.6V (Single Supply) or ±1.8V (Split Supply)
●● Enables System Integration
• Low Noise, 6.2nV/√Hz PGA with Gains of 1, 2, 4,
8, 16, 32, 64, 128
• 6-Channel, Fully Differential Input
●● Enables On-Demand Device and System Gain and
Offset Calibration
• User-Programmable Offset and Gain Registers
●● Robust Performance in a Small Package
• -40°C to +125°C Operating Temperature Range
• TQFN Package, 5mm x 5mm
Ordering Information appears at end of data sheet.
2.7V TO 3.6V
REF
1µF
2.0V TO 3.6V
1nF
C0G
AIN0N
AIN5P
1nF
C0G
AIN0P
REFN REFP
AVDD
MAX11253
DVDD
RSTB
CSB
SCLK
DIN
DOUT
RDYB
AIN5N
GPO0 GPO1 GPOGND CAPP CAPN CAPREG AVSS
220nF
0603
X7R
1nF
C0G
RESISTIVE BRIDGE MEASUREMENT CIRCUIT, SPI CONFIGURATION
DGND
1µF
µC
19-7650; Rev 0; 6/15