Texas Instruments TLV0838IN

Overview

TLV0838IN from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter (ADC) with integrated 8-channel analog multiplexer, serial control interface, and ratiometric operation using V_CC as reference. It operates from 2.7 V to 3.6 V, delivers ±1 LSB total unadjusted error, supports single-ended/differential/pseudodifferential input configurations, and achieves 32 µs conversion time at 250 kHz clock - used in industrial sensor signal conditioning and embedded data acquisition systems.

For engineers reviewing the TLV0838IN datasheet, TLV0838IN pinout, TLV0838IN application, or TLV0838IN equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters across –40°C to +85°C, and real-world design implications for microprocessor-interfaced ADC selection.

Technical Context

The TLV0838IN implements a sample-data comparator architecture with internal SAR logic, enabling configurable channel selection via 5-bit serial address words (start bit + 4-bit assignment). Its multiplexer supports eight analog inputs (CH0–CH7) plus COM terminal, allowing pseudodifferential mode where COM serves as common negative reference for all channels.

Serial communication uses DI/DO lines synchronized to external CLK, with CS enabling logic and SARS indicating conversion status. Input polarity (±), single-ended/differential mode, and ODD/EVEN pairing are software-defined per channel - no hardware reconfiguration required. The device outputs MSB-first by default; SE pin controls LSB-first output timing.

Key Specifications

Pinout & Package

TLV0838IN is packaged in a 20-pin plastic DIP (PDIP-N) with through-hole mounting and industry-standard pin spacing. Pin numbering follows standard DIP convention with Pin 1 in top-left corner when notch faces upward.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit serial ADC applications.

Compared with TLV0838IN, TLV0838IPW offers identical functionality in a compact surface-mount package ideal for high-density layouts, while ADC0838CCN represents an older-generation part requiring higher supply voltage and lacking key features like pseudodifferential input and ratiometric operation.

Availability

TLV0838IN is available at Aetrix Electronics and suitable for industrial sensor interface, embedded data logging, and motor control feedback applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TLV0838IN 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 experience in precision data converters and industrial-grade ICs.

The TLV0838IN belongs to TI's TLV083x family of low-voltage serial ADCs designed specifically for cost-sensitive, space-constrained embedded systems requiring multichannel analog sensing at 3-V operation.

FAQ

What is the maximum clock frequency supported by TLV0838IN?

The TLV0838IN supports up to 600 kHz clock frequency when operated at V_CC = 3.3 V. At V_CC = 2.7 V, the maximum clock frequency is 250 kHz. Clock duty cycle must be maintained between 40% and 60%; outside this range, minimum pulse width must be ≥1 µs. These limits ensure reliable sampling and internal logic timing for the TLV0838IN.

Does TLV0838IN require an external voltage reference?

No, the TLV0838IN does not require an external voltage reference. It supports ratiometric operation using V_CC as the reference source, simplifying design and reducing component count. The REF pin may be left unconnected for this mode, or tied to an external reference up to V_CC for improved absolute accuracy - a key flexibility built into the TLV0838IN.

How is differential input configured on TLV0838IN?

Differential input on TLV0838IN is configured via serial address bits sent to the DI pin during CS low. Adjacent channel pairs (e.g., CH0/CH1, CH2/CH3) are assigned as differential pairs, with polarity (+/–) selectable per pair. The COM pin is not used in true differential mode - it is reserved for pseudodifferential operation. This configuration is fully software-controlled and applies to each TLV0838IN conversion cycle.

What is the purpose of the SE pin on TLV0838IN?

The SE (Start Enable) pin on TLV0838IN controls the data output format: when SE is high, DO outputs MSB-first only; when SE is driven low before conversion completion, DO outputs the full 8-bit result twice - first MSB-first, then LSB-first. This dual-format capability allows compatibility with microcontrollers that expect either ordering without additional software bit-reversal - a unique feature of the TLV0838IN.

Can TLV0838IN operate with a single 3.3-V supply and still achieve full-scale input range?

Yes, TLV0838IN achieves full-scale 0 V to V_CC input range with a 3.3-V supply. However, note that analog input voltages must not exceed V_CC by more than 50 mV to avoid forward-conducting internal protection diodes and introducing code errors. For guaranteed 0–3.3 V operation across temperature and load, a minimum V_CC of 3.25 V is recommended - a critical design constraint for the TLV0838IN.