Click here to ask about the production status of specific part numbers. MAX11261 24-Bit, 6-Channel, 16ksps, 6.2nV/Hz PGA, 2 Delta-Sigma ADC with I C Interface General Description Benefits and Features The MAX11261 is a 6-channel, 24-bit delta-sigma ADC Analog Supply that achieves exceptional performance while consuming 2.7V to 3.6V very low power. Sample rates up to 16ksps allow precision Digital Supply DC measurements. The device also features a 64-entry, Internal LDO Disabled1.7V to 2.0V on-chip FIFO to offload the host processor. The Internal LDO Enabled2.0V to 3.6V 2 MAX11261 communicates through an I C-compatible se- 3ppm INL (typ) rial interface and is available in a small, wafer-level pack- PGA age (WLP). Gains of 1, 2, 4, 8, 16, 32, 64, 128 The MAX11261 offers a 6.2nV/Hz noise programmable Low-Noise Mode, 6.2nV/Hz Noise gain amplifier (PGA) with gain settings from 1x to 128x. Low-Power Mode, 10nV/Hz Noise The integrated PGA provides isolation of the signal inputs Input-Referred Noise from the switched capacitor sampling network. The PGA PGA Low-Noise Mode, Gain of 64 at 1ksps also enables the MAX11261 to interface directly with high- Continuous, 0.15V RMS impedance sources without compromising the available dynamic range. Fully Differential Signal and Reference Inputs Internal System Clock of 8.192MHz The MAX11261 operates from a single 2.7V to 3.6V ana- 2 I C-Compatible Serial Interface log supply. The digital supply range is 1.7V to 2.0V (inter- Supports Standard, Fast-Mode, and Fast-Mode Plus nal LDO off) and 2.0V to 3.6V (internal LDO on) enabling 2 I C Specifications communication with 1.8V, 2.5V, 3V, or 3.3V logic. 64-Entry, On-Chip FIFO Hardware Interrupt for Input Monitoring and FIFO Applications Usage Wearable Electronics On-Demand Self and System Gain and Offset Medical Equipment Calibration Weigh Scales User-Programmable Offset and Gain Registers Pressure Sensors Two Power-Down Modes (SLEEP and STANDBY) Battery-Powered Instrumentation Low Power Dissipation ESD Rating: 2.5kV (HBM), 750V (CDM) -40C to +85C Operating Temperature Range 6 x 6 Bump, 0.4mm Pitch, 2.838mm x 2.838mm x 0.5mm WLP Ordering Information appears at end of data sheet. 19-100250 Rev 1 11/20MAX11261 24-Bit, 6-Channel, 16ksps, 6.2nV/Hz PGA, Delta- 2 Sigma ADC with I C Interface Typical Application Circuit 2.7V TO 3.6V 2.0V TO 3.6V REF 10nF 1F 1F AVDD DVDD REFN REFP SYNC AIN0P 1nF RSTB C0G AIN0N ADR0 ADR1 MAX11261MAX11261 C SCL SDA AIN5P 1nF RDYB INTB C0G AIN5N GPO0 GPO5 GPOGND CAPP CAPN CAPREG AVSS DGND 220nF 0603 X7R 1nF C0G 2 RESISTIVE BRIDGE MEASUREMENT CIRCUIT, I C CONFIGURATION www.maximintegrated.com Maxim Integrated 2