TLV1508IDWG4

Analog To Digital Converters (ADC) Overview

The TLV1508IDWG4 is a 10-bit successive approximation analog-to-digital converter (ADC) manufactured by Texas Instruments. It features an 8-channel analog multiplexer, a built-in reference, conversion clock, and an 8-deep FIFO buffer. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and achieves a maximum throughput of 200 kSPS with a typical conversion time of 3.86 µs. Differential and integral nonlinearity errors are limited to ±1 LSB. It supports SPI and DSP-compatible serial interfaces with SCLK up to 20 MHz. The component is housed in a 16-pin SOIC package and is characterized for operation from -40°C to 85°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 8-channel analog multiplexer with break-before-make switching to reduce noise injection.
• Built-in 4 V or 2 V internal reference with provisions for external reference input.
• Configurable sampling period using short/long modes or extended hardware-controlled CSTART pin.
• Programmable auto-channel sweep sequences with interrupt generation based on FIFO fill levels.

Analog To Digital Converters (ADC) Applications

• Data acquisition systems requiring multi-channel signal monitoring
• Industrial process control and instrumentation
• Battery-powered portable equipment due to low power consumption
• Audio and vibration sensing applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix IDWG4 corresponds to the industrial temperature range (-40°C to 85°C) and the 16-pin SOIC package. Confirm RoHS compliance status as indicated by the G4 suffix. Ensure the host microprocessor interface matches the required CPOL=0 and CPHA=0 settings for proper SPI synchronization.

Analog To Digital Converters (ADC) Selection Notes

Select this component when eight analog inputs require simultaneous or sequential digitization at moderate speeds. Consider the TLV1508IDWG4 over the TLV1504 if additional channels are needed. Evaluate the need for the internal FIFO and programmable sweep features against simpler single-shot requirements to optimize system complexity and power usage.

Analog To Digital Converters (ADC) Part Context

This part belongs to the TLV150x family of low-power, high-speed ADCs. It shares architectural similarities with the TLV1504 but provides eight analog inputs instead of four. Pin-compatible 12-bit upgrades such as the TLV2544 and TLV2548 are available within the same product family for applications requiring higher resolution.

Analog To Digital Converters (ADC) Replacement Considerations

The TLV1508IPWRG4 serves as a pin-compatible alternative featuring a 20-pin TSSOP package. Verify that the target PCB footprint accommodates the different physical dimensions of the TSSOP-20 versus the SOIC-16 package before substitution.

Analog To Digital Converters (ADC) FAQ

How is the sampling period controlled?

The sampling period can be programmed to 12 SCLKs (short) or 24 SCLKs (long). Alternatively, the CSTART pin allows for extended, user-defined sampling periods independent of the serial clock.

What is the function of the EOC/(INT) pin?

This pin functions as either an End of Conversion (EOC) signal or an Interrupt (INT) output to the host processor, depending on the Configuration Register (CFR) setting.

Can the device operate without an external reference?

Yes, the device includes an internal reference voltage (selectable between 2 V and 4 V). If used, the REFM pin must be tied to analog ground.