MAX11254：24-Bit, 6-Channel, 64ksps, 6.2nV/√Hz PGA, Delta-Sigma ADC with SPI Interface

24-Bit Delta-Sigma ADC Offers 10X Less Power with Superior Noise Performance

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 precision DC measurements. The MAX11254 communicates via a SPI serial interface and is available in a small (5mm x 5mm) TQFN package. The MAX11254 offers a 6.2nV/ 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. 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.

Key Features

High Resolution for Industrial Applications that 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
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

MAX11254: Functional Diagram

Applications/Uses

Analog I/O for Programmable Logic Controllers
Battery-Powered Instrumentation
Pressure Sensors
Weigh Scales

DataSheet

title	Download file
MAX11254 Data Sheet	MAX11254.pdf

Parametrics

Part Number	Resolution (bits)	Input Chan.	Conv. Rate (ksps)	ADC Architecture	Data Bus	Diff/S.E. Input	External V_REF (V)	External V_REF (V)	Unipolar V_IN (V)	Bipolar V_IN (±V)	SNR (dB)	Package/Pins	Budgetary Price
Part Number	ADC	Input Chan.	max	ADC Architecture	Data Bus	Diff/S.E. Input	min	max	max	max	SNR (dB)	Package/Pins	See Notes
MAX11254	24	6	64	Sigma-Delta	Microwire QSPI SPI	Diff. Only	0	3.6	3.6	1.8	133	TQFN/32	$7.91 @1k