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MAX11140：500ksps, Low-Power, Serial 12-/10-/8-Bit, 4-/8-/16-Channel ADCs

Most Flexible Family of Pin- and Software-Compatible, 500ksps, Multichannel ADCs with External Reference

The MAX11135–MAX11143 are 12-/10-/8-bit with external reference and industry-leading 1.5MHz, full linear bandwidth, high speed, low-power, serial output successive-approximation register (SAR) analog-to-digital converters (ADCs). The MAX11135–MAX11143 include both internal and external clock modes. These devices feature scan mode in both internal and external clock modes. The internal clock mode features internal averaging to increase SNR. The external clock mode features the SampleSet™ technology, a user-programmable analog input channel sequencer. The SampleSet approach provides greater sequencing flexibility for multichannel applications while alleviating significant microcontroller or DSP (controlling unit) communication overhead. The internal clock mode features an integrated FIFO allowing data to be sampled at high speeds and then held for readout at any time or at a lower clock rate. Internal averaging is also supported in this mode improving SNR for noisy input signals. The devices feature analog input channels that can be configured to be single-ended inputs, fully differential pairs, or pseudo-differential inputs with respect to one common input. The MAX11135–MAX11143 operate from a 2.35V to 3.6V supply and consume only 4.2mW at 500ksps. The MAX11135–MAX11143 include AutoShutdown™, fast wake-up, and a high-speed 3-wire serial interface. The devices feature full power-down mode for optimal power management. The 8MHz, 3-wire serial interface directly connects to SPI, QSPI™, and MICROWIRE® devices without external logic. Excellent dynamic performance, low voltage, low power, ease of use, and small package size make these converters ideal for portable battery-powered data-acquisition applications, and for other applications that demand low power consumption and small space. The MAX11135–MAX11143 are available in 28-pin, 5mm x 5mm, TQFN packages and operate over the -40°C to +125°C temperature range.

Key Features Scan Modes, Internal Averaging, and Internal Clock 16-Entry First-In-First-Out (FIFO) SampleSet: User-Defined Channel Sequence with Maximum Length of 256 Analog Multiplexer with True Differential Track/Hold 16-/8-/4-Channel Single-Ended 8-/4-/2-Channel Fully Differential Pairs 15-/8-/4-Channel Pseudo-Differential Relative to a Common Input Two Software-Selectable Bipolar Input Ranges ±VREF/2, ±VREF Flexible Input Configuration Across All Channels High Accuracy ±1 LSB INL, ±1 LSB DNL, No Missing Codes Over Temperature Range 70dB SINAD Guaranteed at 250kHz Input Frequency 1.5V to 3.6V Wide Range I/O Supply Allows the Serial Interface to Connect Directly to 1.8V, 2.5V, or 3.3V Digital Systems 2.35V to 3.6V Supply Voltage Longer Battery Life for Portable Applications Low Power 4.2mW at 500ksps with 3V Supplies 2µA Full-Shutdown Current External Differential Reference (1V to VDD) 8MHz, 3-Wire SPI-/QSPI-/MICROWIRE-/DSP-Compatible Serial Interface Wide -40°C to +125°C Operation Space-Saving, 28-Pin, 5mm x 5mm TQFN Packages 500ksps Conversion Rate, No Pipeline Delay 12-/10-/8-Bit Resolution

MAX11135, MAX11136, MAX11137, MAX11138, MAX11139, MAX11140, MAX11141, MAX11142, MAX11143: Typical Application Circuit Applications/Uses Battery-Powered Instruments High-Speed Closed-Loop Systems High-Speed Data Acquisition Systems Industrial Control Systems Medical Instrumentation Portable Systems

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