18-Bit, 500ksps, ±5V SAR ADC with Internal Reference in TDFN

Industry's Smallest, True Bipolar ±5V, 18-Bit ADC

Description

The MAX11156 18-bit, 500ksps, SAR ADC offers excellent AC and DC performance with true bipolar input range, small size, and internal reference. The MAX11156 measures a ±5V (10V_P-P) input range while operating from a single 5V supply. A patented charge-pump architecture allows direct sampling of high-impedance sources. The MAX11156 integrates an optional 6ppm/°C reference with internal buffer, saving the cost and space of an external reference.

The MAX11156 produces 94.6dB SNR and -105dB THD (typ). The MAX11156 guarantees 18-bit no-missing codes.

The MAX11156 communicates using an SPI-compatible serial interface at 2.5V, 3V, 3.3V, or 5V logic. The serial interface can be used to daisy-chain multiple ADCs in parallel for multichannel applications and provides a busy indicator option for simplified system synchronization and timing.

The MAX11156 is offered in a 12-pin, 3mm x 3mm, TDFN package and is specified over the -40°C to +85°C temperature range.

Key Features

High DC and AC Accuracy
18-Bit Resolution with No Missing Codes
SNR: 94.6dB
THD: -105dB at 10kHz
±2.5 LSB INL (typ)
±0.4 LSB DNL (typ)
Internal Reference and Reference Buffer Save Cost and Board Space
6ppm/°C (typ)
Tiny 12-Pin 3mm x 3mm TDFN Package
Bipolar ±5V Analog Input Range Saves External Signal Conditioning
Single-Supply ADC with Low Power
5V Analog Supply
2.3V to 5V Digital Supply
26.5mW at 500ksps
Shutdown Mode
500ksps Throughput Rate
No Pipeline Delay/Latency
Flexible Industry-Standard Serial Interface Saves I/O Pins
SPI/QSPI^™/MICROWIRE^®/DSP-Compatible