Click here for production status of specific part numbers. MAX11900 16-Bit, 1Msps, Low-Power, Fully Differential SAR ADC General Description Benefits and Features The MAX11900 is a 16-bit, 1Msps, single-channel, fully High DC/AC Accuracy Improves Measurement differential SAR ADC with internal reference buffers. The Quality MAX11900 provides excellent static and dynamic perfor- 16-Bit Resolution with No Missing Codes mance with best-in-class power consumption that directly 1Msps Throughput Rates Without Pipeline Delay/ scales with throughput. The device has a unipolar differ- Latency ential V input range. Supplies include a 3.3V supply REF 95.6dB SNR and -115dB THD at 10kHz for the reference buffers, a 1.8V analog supply, a 1.8V 0.4 LSB Transition Noise RMS digital supply, and a 1.5V to 3.6V digital interface supply. 0.25 LSB DNL (max) and 0.5 LSB INL (max) This ADC achieves 95.6dB SNR and -115dB THD, guar- Highly Integrated ADC Saves Cost and Space antees 16-bit resolution with no-missing codes and 0.5 Internal Reference Buffer LSB INL (max). Wide Supply Range and Low Power Simplify Power- The MAX11900 communicates data using a SPI- compatible serial interface. The MAX11900 is offered in a Supply Design 20-pin, 4mm x 4mm, TQFN package and is specified over 1.8V Analog Supply the -40C to +85C operating temperature range. 1.5V to 3.6V Digital Supply 6.7mW Power Consumption at 1Msps Applications 6.7W Power Consumption at 1ksps Test and Measurement 1A in Shutdown Mode Automatic Test Equipment Multi-Industry Standard Serial Interface and Small Medical Instrumentation Package Reduces Size Process Control and Industrial Automation SPI/QSPI/MICROWIRE/DSP-Compatible Serial Interface Data Acquisition Systems 4mm x 4mm 20-Pin TQFN Package Telecommunications Battery-Powered Equipment Ordering Information and Selector Guide appears at end of QSPI is a trademark of Motorola, Inc. data sheet. MICROWIRE is a registered trademark of National Application Diagram Semiconductor Corporation. 1.5 TO 3.6V 1.8V 1.8V 3.3V 3.6V 16-Bit to 20-Bit SAR ADC Family REFVDD AVDD DVDD OVDD 10 REFIN 16-BIT 18-BIT 20-BIT AIN+ DIN 0 TO 3.3V 4-WIRE 2nF SCLK SPI C0G MAX11900 1.6Msps MAX11901 MAX11903 MAX11905 DOUT INTERFACE CNVST AIN- 10 1Msps MAX11900 MAX11902 MAX11904 REF A D REF REF GND GND GND 3.3V TO 0 10F 19-7510 Rev 1 9/18MAX11900 16-Bit, 1Msps, Low-Power, Fully Differential SAR ADC TABLE OF CONTENTS General Description ............................................................................ 1 Applications .................................................................................. 1 Benefits and Features .......................................................................... 1 Application Diagram............................................................................ 1 16-Bit to 20-Bit SAR ADC Family ................................................................. 1 Absolute Maximum Ratings ...................................................................... 4 Package Thermal Characteristics ................................................................. 4 Electrical Characteristics ........................................................................ 4 Typical Operating Characteristics ................................................................. 8 Pin Configuration ............................................................................. 12 Pin Description ............................................................................... 12 Functional Diagram ........................................................................... 13 Detailed Description........................................................................... 14 Analog Inputs 14 Input Settling . 16 Input Filtering 16 Voltage Reference Configurations 17 Transfer Function . 17 Digital Interface .............................................................................. 19 SPI Timing Diagram . 20 Register Write 22 Register Read 22 Register Map ................................................................................ 23 Mode Register 23 Conversion Result Register . 24 Chip ID Register 24 Typical Application Circuit ...................................................................... 24 Single-Ended Unipolar Input to Differential Unipolar Output 24 Single-Ended Bipolar Input to Differential Unipolar Output . 24 Layout, Grounding, and Bypassing ............................................................... 24 Definitions................................................................................... 27 Integral Nonlinearity . 27 Differential Nonlinearity 27 Offset Error . 27 Gain Error . 27 Signal-to-Noise Ratio 27 Signal-to-Noise Plus Distortion 27 Maxim Integrated 2 www.maximintegrated.com