MAX1396ETB+T

Analog To Digital Converters (ADC) Overview

The MAX1396ETB+T is a micropower, serial-output, 12-bit successive-approximation register (SAR) analog-to-digital converter (ADC). It operates from a single +1.5V to +3.6V supply and features two single-ended analog input channels with channel-select capability. The device supports a maximum throughput rate of 312.5ksps with a conversion time of 2.6µs. Power consumption is optimized via AutoShutdown mode between conversions, achieving as low as 3.1µW at 1ksps. It utilizes an external reference voltage ranging from 0.6V to VDD and communicates through a 5MHz SPI-/QSPI-/MICROWIRE-/DSP-compatible 3-wire or 4-wire serial interface.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit SAR ADC with 312.5ksps throughput rate
• Dual single-ended analog inputs with channel select
• AutoShutdown mode reduces power to <1µA shutdown current
• Compatible with SPI, QSPI, MICROWIRE, and DSP interfaces

Analog To Digital Converters (ADC) Applications

• Portable datalogging systems
• Battery-powered data acquisition instruments
• Medical instrumentation
• Process control applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the component designation includes the '+T' suffix for tape-and-reel packaging and the '+' suffix for lead-free/RoHS compliance. Confirm the 'E' temperature grade corresponds to the -40°C to +85°C operating range. Ensure the specific ordering information matches the dual-channel single-ended configuration required for the design.

Analog To Digital Converters (ADC) Selection Notes

Select the MAX1396ETB+T when dual single-ended inputs are required; use the MAX1393 variant for true-differential input applications. Ensure the external reference voltage source can support the dynamic current requirements up to 60µA at maximum sampling rates. Verify that the system's serial clock frequency does not exceed the 5MHz limit for reliable data transfer.

Analog To Digital Converters (ADC) Part Context

This component belongs to the MAX1393/MAX1396 family of micropower 12-bit SAR ADCs. Both variants share identical electrical characteristics regarding speed, power, and interface protocols. The primary distinction lies in the analog input architecture: the MAX1396 provides two single-ended channels, whereas the MAX1393 offers one true-differential channel.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1393ETB+T serves as a functional alternative within the same package if differential signaling is preferred over dual single-ended inputs. Other Maxim Integrated SAR ADCs may require significant circuit redesign due to differences in interface protocols, pinouts, or power specifications.

Analog To Digital Converters (ADC) FAQ

How does the AutoShutdown feature affect power consumption?

The ADC automatically powers down on the falling edge of the SCLK that clocks out the LSB. This reduces power consumption significantly at slower throughput rates, dropping to less than 1µA in shutdown mode.

What is the valid input voltage range for the analog channels?

The analog inputs accept signals ranging from 0 to VREF. The external reference voltage must be between 0.6V and VDD + 0.05V.

Can this device interface directly with DSPs?

Yes, the serial interface is compatible with DSPs. For DSP operation, the frame-sync signal typically drives the CS input, while OE may be connected to GND or driven independently.