EVALUATION KIT AVAILABLE
MAX11254
24-Bit, 6-Channel, 64ksps, 6.2nV/√Hz PGA,
Delta-Sigma ADC with SPI Interface
General Description
Benefits and Features
● High Resolution for Industrial Applications that
The MAX11254 is a 6-channel, 24-bit delta-sigma ADC
that achieves exceptional performance while consuming
very low power. Sample rates up to 64ksps allow preci-
sion DC measurements. The MAX11254 communicates
via a SPI serial interface and is available in a small (5mm
x 5mm) TQFN package.
Require a Wide Dynamic Range
• 133dB SNR at 50sps
• 124dB SNR at 1000sps
● Longer Battery Life for Portable Applications
• 2.2mA Operating Mode Current
• 1μA Sleep Current
The MAX11254 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 MAX11254 to interface directly with
high-impedance sources without compromising available
dynamic range.
● 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
The MAX11254 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.
• 6-Channel, Fully Differential Input
● Enables On-Demand Device and System Gain and
Offset Calibration
• User-Programmable Offset and Gain Registers
Applications
● Analog I/O for Programmable Logic Controllers
● Weigh Scales
● Pressure Sensors
● Robust Performance in a Small Package
• -40°C to +125°C Operating Temperature Range
• TQFN Package, 5mm x 5mm
● Battery-Powered Instrumentation
Typical Application Circuit
2.7V TO 3.6V
REF
2.0V TO 3.6V
1µF
10nF
1µF
REFN REFP
AVDD
DVDD
AIN0P
1nF
C0G
RSTB
CSB
AIN0N
SCLK
µC
MAX11254
DIN
DOUT
AIN5P
RDYB
1nF
C0G
AIN5N
GPO0 GPO1 GPOGND CAPP CAPN CAPREG AVSS
DGND
220nF
0603
X7R
1nF
C0G
RESISTIVE BRIDGE MEASUREMENT CIRCUIT, SPI CONFIGURATION
19-7542; Rev 1; 4/15