Texas Instruments TLV0834CPW

Overview

TLV0834CPW from Texas Instruments is a 4-channel, 8-bit successive-approximation analog-to-digital converter (ADC) with serial interface, operating from 2.7 V to 3.6 V supply, delivering ±1 LSB total unadjusted error and 32 µs conversion time at 250 kHz clock. It supports single-ended or differential input configurations and is used in embedded sensor signal conditioning where low-voltage, space-constrained digital acquisition is required.

For engineers reviewing the TLV0834CPW datasheet, TLV0834CPW pinout, TLV0834CPW application, or TLV0834CPW equivalent, key selection considerations include its TSSOP-16 package, ratiometric operation with V_CC reference, software-configurable multiplexer addressing, and compatibility with TTL/MOS logic levels for microprocessor interfacing.

Technical Context

The TLV0834CPW implements a sample-data comparator architecture with internal successive-approximation register (SAR) and resistive ladder. Its 4-channel analog multiplexer is controlled via a 3–4-bit serial address word shifted in through DI, with CS enabling logic and CLK synchronizing both address loading and conversion timing.

Conversion begins after the start bit shifts into the multiplexer register; SARS goes high during conversion, and DO outputs MSB-first data over eight clock cycles, followed by LSB-first data. Input polarity, single-ended/differential mode, and channel selection are all determined by the serial address sequence - no external configuration pins are required.

Key Specifications

Pinout & Package

TSSOP-16 package (4.4 mm × 5.0 mm, 0.65 mm pitch), RoHS-compliant, moisture sensitivity level 1, rated for 0°C to 70°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV0834CPW, TLV0834IPW offers identical electrical performance with extended temperature tolerance, while ADC0834CCN provides drop-in functional equivalence in a through-hole package - neither requires PCB redesign, but only TLV0834IPW maintains the same surface-mount form factor and reliability profile.

Availability

TLV0834CPW is available at Aetrix Electronics and suitable for industrial sensor interface, automotive cabin monitoring, and consumer appliance control requiring stable component supply and long-term production continuity.

Supply support for TLV0834CPW 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 and embedded processing technologies, with decades of expertise in precision data converters and low-power interface solutions.

The TLV0834CPW belongs to TI's legacy low-voltage ADC family designed for cost-sensitive, space-constrained applications requiring simple serial interfacing and ratiometric accuracy - particularly in industrial and consumer systems operating from 3-V rails.

FAQ

What is the maximum clock frequency supported by the TLV0834CPW?

The TLV0834CPW supports up to 600 kHz clock frequency when V_CC = 3.3 V, and 250 kHz when V_CC = 2.7 V. At higher frequencies, conversion time scales linearly - e.g., at 600 kHz, conversion completes in ~13.3 µs. The device requires a 40%–60% clock duty cycle for reliable operation; outside this range, minimum pulse width must be ≥1 µs.

Does the TLV0834CPW require an external voltage reference?

No, the TLV0834CPW does not require an external voltage reference. It operates ratiometrically using V_CC as the reference, which simplifies design and reduces BOM cost. An external reference can be applied to the REF pin if tighter absolute accuracy or independent scaling is needed, but V_CC-referenced operation is fully supported and commonly used in 3-V systems.

Can the TLV0834CPW perform differential measurements?

Yes, the TLV0834CPW supports differential input measurements between adjacent channels (e.g., CH0–CH1 or CH2–CH3), with software-selectable polarity. The serial address word determines whether each pair operates in differential mode and assigns positive/negative terminals. This enables common-mode rejection for noise-prone environments without external instrumentation amplifiers.

What is the function of the SARS pin on the TLV0834CPW?

The SARS (Start of Acquisition and Result Status) pin on the TLV0834CPW is an active-high, open-drain output that asserts during conversion to indicate "conversion in progress." It remains high for the duration of the 8-clock-cycle conversion and goes low upon completion. SARS allows external logic or microcontrollers to synchronize data capture without polling DO or relying solely on fixed timing delays.

Is the TLV0834CPW pin-compatible with the TLV0838CPW?

No, the TLV0834CPW is not pin-compatible with the TLV0838CPW. Although both use TSSOP-16 packages, the TLV0834CPW has 4 analog inputs (CH0–CH3) and 16 pins including NCs, while the TLV0838CPW has 8 analog inputs (CH0–CH7) plus COM and SE pins - resulting in different pin assignments and incompatible footprints. Board layout must be redesigned to switch between them.