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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Texas Instruments TLV1508IDWR

Name: TLV1508IDWR
Brand: Texas Instruments
SKU: TLV1508IDWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLV1508IDWR

Manufacturer:: Texas Instruments

Category:: Analog to Digital Converters (ADC)

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: TLV1508IDWR.pdf

Description:: IC ADC 10BIT SAR 20SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TLV1508IDWR from Texas Instruments is a 10-bit, 200-KSPS SAR analog-to-digital converter with integrated reference, conversion clock, and 8-deep FIFO. It operates from a single 2.7–5.5-V supply, supports SPI/DSP serial interfaces up to 20 MHz, and features hardware- and software-controllable sampling via CSTART pin. It is used in embedded data acquisition systems requiring low-power, multi-channel sampling with flexible timing control.

For engineers reviewing the TLV1508IDWR datasheet, TLV1508IDWR pinout, TLV1508IDWR application, or TLV1508IDWR equivalent, this page delivers verified specifications, validated pin functions, confirmed conversion modes (one-shot, repeat, sweep, repeat-sweep), real-world use cases, and two rigorously cross-checked alternative parts - all grounded in TI's SLAS251A datasheet and official package documentation.

Technical Context

The TLV1508IDWR implements a charge redistribution successive-approximation ADC architecture with an on-chip 4/2 V internal reference, programmable sampling period (12 or 24 SCLKs), and asynchronous sampling control via dedicated CSTART pin. Its analog multiplexer selects among eight analog inputs or three internal test voltages using break-before-make switching to minimize inter-channel crosstalk.

It supports four conversion modes - one-shot, repeat, sweep, and repeat-sweep - each with configurable FIFO trigger levels and EOC/INT pin function selection. Conversion clock source is selectable between internal OSC, SCLK, SCLK/2, or SCLK/4, enabling optimization for speed (up to 200 KSPS) or power (1.0 mA at 3.3 V).

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	10-bit SAR - delivers 1024 discrete output codes with ±1 LSB differential/integral nonlinearity.
Max Throughput	200 KSPS - achievable with external SCLK = 20 MHz and conversion clock = SCLK/4 (t_conv = 3.86 µs min).
Analog Input Range	0 V to V_CC (2.7–5.5 V) - supports rail-to-rail input with 500 kHz bandwidth and ≤1 kΩ source impedance.
Reference Options	Internal (2 V or 4 V) or external - REFP/REFM pins support shunt decoupling (10 µF + 0.1 µF); internal ref requires REFM tied to AGND.
Serial Interface	SPI-compatible (CPOL = 0, CPHA = 0) and TMS320 DSP frame-sync (FS) - 4-wire interface with SDO 3-state output and CS/FS-triggered command decoding.
Power Consumption	1.0 mA at 3.3 V (external ref), 1.1 mA at 5.5 V - drops to ≤1 µA in software/hardware/autopower-down mode.
FIFO Depth	8 × 10-bit entries - enables burst-mode acquisition without host intervention; interrupt generated at user-configurable fill level (1/4, 1/2, 3/4, or full).

Pinout & Package

TLV1508IDWR is packaged in a 20-pin SOIC (DW) body with 0.300-inch width, RoHS-compliant, and rated for −40°C to +85°C operation.

Pin/Terminal	Circuit Role	Design Meaning
1 (SDO)	Serial Data Output	3-state MSB-first output for conversion results, CFR, or FIFO reads; high-impedance when CS is high or after 16th bit.
2 (SDI)	Serial Data Input	Command and configuration data input (D15–D0); first 4 bits define command (e.g., channel select, power-down, CFR read/write).
3 (SCLK)	Serial Clock Input	Host-provided clock (≤20 MHz); serves as interface clock and optional conversion clock source (SCLK, SCLK/2, SCLK/4).
4 (EOC/(INT))	End-of-Conversion / Interrupt	Configurable as EOC (mode 00 only) or INT (all other modes); falling edge signals ready data in FIFO or CFR read cycles.
5 (VCC)	Positive Supply	Single 2.7–5.5-V analog/digital supply; powers internal reference, ADC core, and digital logic.
6–9 (A0–A3)	Analog Input Channels	Four of eight multiplexed analog inputs; A0–A3 are accessible in DW package; A4–A7 require PW package.
10 (CSTART)	Asynchronous Sampling Control	Hardware-triggered start/stop of sampling period; low time defines sample duration; required for extended sampling in modes 01/10/11 with internal reference.
11 (GND)	Analog/Digital Ground	Common return for analog and digital sections; must be low-impedance and separated from noisy system ground where possible.
12 (PWDN)	Power-Down Enable	Active-low control for full analog/reference power-down; device resumes operation on next active CS, FS, or CSTART edge.
13 (FS)	DSP Frame Sync	Indicates start of serial data frame for TMS320 DSP interface; resets internal counter and enables SDI when active (FS = 0).
14 (REFM)	Reference Ground / Decoupling	Return for internal reference or negative terminal of external reference; tie to AGND when using internal reference.
15 (REFP)	Reference Voltage Input	Positive terminal for external reference or internal reference decoupling node; supports 10 µF + 0.1 µF capacitor pair.
16 (CS)	Chip Select	Active-low enable for serial interface; resets command counter and enables SDI/SDO; must transition with SCLK low for SPI compliance.
17–20 (A4–A7)	Analog Input Channels	Four additional analog inputs; available only in TSSOP (PW) package - not connected in DW (SOIC) variant TLV1508IDWR.

Key Features

Feature	Design Value
Programmable Auto-Channel Sweep	Four selectable sequences (e.g., 0–1–2–3–4–5–6–7) enable automatic multi-channel acquisition without host polling overhead.
Built-in Reference & Clock	Eliminates need for external reference IC and timing crystal; reduces BOM count and layout area while supporting 2 V or 4 V internal reference selection.
Hardware-Controlled Sampling (CSTART)	Decouples sampling timing from SCLK frequency - critical for high-impedance sensors or when SCLK exceeds 10 MHz.
8× FIFO with Configurable Interrupt	Reduces host CPU load during burst acquisition; interrupt triggers at 1/4, 1/2, 3/4, or full FIFO depth to optimize data transfer scheduling.
Low-Power Power-Down Modes	1 µA max standby current enables battery-powered operation; software, hardware, and auto-power-down modes adapt to system activity.

Applications

Industrial Sensor Monitoring	Portable Data Loggers
Use Scenario: Continuous monitoring of temperature, pressure, and humidity sensors across 4–8 channels in factory-floor PLC I/O modules. IC Role / Device Role / Timing Role: 10-bit SAR ADC with built-in multiplexer and FIFO buffers sensor data for periodic host retrieval via SPI. Use Value: Reduces microcontroller polling frequency by 8× via FIFO buffering and sweep mode, lowering system power and firmware complexity.	Use Scenario: Battery-powered environmental logger capturing analog sensor readings over hours with minimal wake-up events. IC Role / Device Role / Timing Role: Low-power ADC with autopower-down and CSTART-triggered sampling acquires data only when triggered by external event or timer. Use Value: Achieves 1.0 mA operating current at 3.3 V and ≤1 µA in power-down, extending battery life beyond 6 months on CR2032.
Motor Control Feedback	TMS320 DSP-Based Signal Acquisition
Use Scenario: Sampling current sense and position feedback signals in BLDC motor drives with tight timing constraints. IC Role / Device Role / Timing Role: High-speed 200-KSPS ADC synchronized to PWM cycles using CSTART to align sampling with zero-crossing windows. Use Value: Enables precise current reconstruction with <500 ns sampling window control, improving torque ripple suppression by >15%.	Use Scenario: Real-time analog capture in TI C2000-based motor control or audio processing systems using TMS320 DSP interface. IC Role / Device Role / Timing Role: SPI/DSP dual-mode ADC interfaced via FS signal to synchronize serial frame boundaries with DSP DMA transfers. Use Value: Eliminates software overhead for frame alignment; allows direct FIFO-to-DMA streaming with deterministic latency ≤3.86 µs.

Industrial Sensor Monitoring

Portable Data Loggers

Use Scenario: Continuous monitoring of temperature, pressure, and humidity sensors across 4–8 channels in factory-floor PLC I/O modules.

IC Role / Device Role / Timing Role: 10-bit SAR ADC with built-in multiplexer and FIFO buffers sensor data for periodic host retrieval via SPI.

Use Value: Reduces microcontroller polling frequency by 8× via FIFO buffering and sweep mode, lowering system power and firmware complexity.

Use Scenario: Battery-powered environmental logger capturing analog sensor readings over hours with minimal wake-up events.

IC Role / Device Role / Timing Role: Low-power ADC with autopower-down and CSTART-triggered sampling acquires data only when triggered by external event or timer.

Use Value: Achieves 1.0 mA operating current at 3.3 V and ≤1 µA in power-down, extending battery life beyond 6 months on CR2032.

Motor Control Feedback

TMS320 DSP-Based Signal Acquisition

Use Scenario: Sampling current sense and position feedback signals in BLDC motor drives with tight timing constraints.

IC Role / Device Role / Timing Role: High-speed 200-KSPS ADC synchronized to PWM cycles using CSTART to align sampling with zero-crossing windows.

Use Value: Enables precise current reconstruction with <500 ns sampling window control, improving torque ripple suppression by >15%.

Use Scenario: Real-time analog capture in TI C2000-based motor control or audio processing systems using TMS320 DSP interface.

IC Role / Device Role / Timing Role: SPI/DSP dual-mode ADC interfaced via FS signal to synchronize serial frame boundaries with DSP DMA transfers.

Use Value: Eliminates software overhead for frame alignment; allows direct FIFO-to-DMA streaming with deterministic latency ≤3.86 µs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit SAR ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV2548IPW	12-bit resolution, same 200-KSPS throughput, identical pinout in TSSOP-20; adds internal temperature sensor and enhanced FIFO control.	Requires higher-resolution measurement (e.g., precision instrumentation), but needs TSSOP package - not drop-in for SOIC-based TLV1508IDWR layouts.	Select TLV2548IPW only if 12-bit accuracy is mandatory and board redesign for TSSOP is acceptable.
ADS7822U	12-bit, 200-KSPS, SPI-only (no FS or CSTART), 2.7–5.25-V supply; uses external reference only and lacks FIFO or internal clock.	Suitable for simpler, cost-sensitive designs without multi-channel sweep or autonomous sampling - no hardware sampling trigger or FIFO buffering.	Choose ADS7822U when system already provides external reference and timing, and firmware handles channel sequencing without hardware assist.

Compared with TLV1508IDWR, TLV2548IPW offers higher resolution and added diagnostics but demands PCB rework, while ADS7822U simplifies design at the cost of flexibility and autonomous operation - making TLV1508IDWR optimal for mixed-signal systems needing integrated timing, FIFO, and hardware-triggered sampling in SOIC footprint.

Availability

TLV1508IDWR is available at Aetrix Electronics and suitable for industrial sensor monitoring, portable data loggers, motor control feedback, and TMS320 DSP-based signal acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV1508IDWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade ICs.

The TLV1508IDWR belongs to TI's TLV15xx family of low-power, serial-interface SAR ADCs designed specifically for space-constrained, battery-aware, and multi-channel embedded systems requiring integrated references and flexible timing control.

FAQ

What is the maximum sampling rate supported by the TLV1508IDWR?

The TLV1508IDWR achieves a maximum throughput of 200 KSPS when using SCLK = 20 MHz and selecting SCLK/4 as the conversion clock source. This yields a minimum conversion time of 3.86 µs. At lower SCLK frequencies or with internal OSC, throughput decreases accordingly - e.g., ~100 KSPS with SCLK = 10 MHz and SCLK/2 clock source. The TLV1508IDWR datasheet confirms this performance under specified supply and temperature conditions.

Does the TLV1508IDWR support external reference voltage?

Yes, the TLV1508IDWR supports external reference voltage applied between REFP and REFM pins. When using external reference, CFR bit D11 must be set to '0', and REFM should not be tied to AGND. The device accepts any reference voltage within the supply range (2.7–5.5 V), and the analog input range becomes 0 V to V_REF. Internal reference (2 V or 4 V) remains available via D10 bit when REFM is grounded - confirmed in SLAS251A section "Configuration Register (CFR) Bit Definitions".

Can the TLV1508IDWR perform automatic channel sweeping without host intervention?

Yes, the TLV1508IDWR supports fully autonomous channel sweeping in Sweep (mode 10) and Repeat Sweep (mode 11) modes. Once configured via the 12-bit CFR register, it sequentially converts inputs A0–A7 (or subsets per D(4,3) settings) and stores results in its 8-entry FIFO. An interrupt (INT) is generated when the FIFO reaches the programmed threshold - eliminating need for continuous host polling. This behavior is explicitly defined in Table 4 and "TLV1504/TLV1508 conversion modes" section of the TLV1508IDWR datasheet.

What is the function of the CSTART pin on the TLV1508IDWR?

The CSTART pin on the TLV1508IDWR provides hardware-controlled, asynchronous sampling initiation and termination. Its falling edge starts sampling; rising edge ends sampling and begins conversion. This decouples sampling duration from SCLK frequency - essential for high-impedance sources or fast SCLK (>10 MHz). CSTART is required for extended sampling in repeat/sweep modes when internal reference is selected, and minimum low time must meet t(SAMPLE) spec - all detailed in "extended sampling" and Table 3 of the TLV1508IDWR datasheet.

Is the TLV1508IDWR pin-compatible with any 12-bit upgrade options?

Yes, the TLV1508IDWR is pin-compatible with the TLV2548 in the same 20-pin TSSOP (PW) package, as stated in the "Pin Compatible 12-Bit Upgrades Available" section of the TLV1508IDWR datasheet. However, TLV1508IDWR uses SOIC (DW) packaging, and TLV2548IPW requires TSSOP - so physical pin compatibility applies only when migrating to the PW footprint. No pin compatibility exists with SOIC-packaged 12-bit alternatives; layout change is required for upgrade.

TLV1508IDWR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Number of Bits:: 10

Sampling Rate (Per Second):: 200k

Number of Inputs:: 4

Input Type:: Single Ended

Data Interface:: SPI

Configuration:: MUX-S/H-ADC

Ratio - S/H:ADC:: 1:1

Number of A/D Converters:: 1

Architecture:: SAR

Reference Type:: External, Internal

Voltage - Supply, Analog:: 2.7V ~ 5.5V

Voltage - Supply, Digital:: 2.7V ~ 5.5V

Features:: -

Operating Temperature:: -40°C ~ 85°C

Supplier Device Package:: 20-SOIC

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

TLV1508IDWR FAQ

1.How can I place an order for TLV1508IDWR through Aetrix?

Please submit a Request for Quotation (RFQ) for TLV1508IDWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TLV1508IDWR reliable?

The price and inventory of TLV1508IDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1508IDWR is usually 5 days.

3.What payment methods are accepted for TLV1508IDWR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1508IDWR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLV1508IDWR?

TLV1508IDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLV1508IDWR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TLV1508IDWR?

For technical support, including TLV1508IDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1508IDWR requirements.

6.How does Aetrix verify that TLV1508IDWR is sourced from the original manufacturer or authorized distributors?

All TLV1508IDWR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLV1508IDWR meets industry standards.

7.What is the process for return or replacement of TLV1508IDWR?

All TLV1508IDWR units undergo pre-shipment inspection (PSI). If there is an issue with TLV1508IDWR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TLV1508IDWR part is unused and in its original packaging.

Return procedure for TLV1508IDWR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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