Texas Instruments TLV0834IN

Overview

TLV0834IN from Texas Instruments is a 4-channel, 8-bit successive-approximation analog-to-digital converter (ADC) with serial control 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, differential, and pseudodifferential input configurations and is rated for –40°C to +85°C industrial operation in a 14-pin PDIP package.

For engineers reviewing the TLV0834IN datasheet, TLV0834IN pinout, TLV0834IN application, or TLV0834IN equivalent, key selection considerations include its ratiometric operation with V_CC reference, software-configurable multiplexer addressing via serial DI/CLK/CS, compatibility with TTL/MOS logic levels, and suitability for remote sensor digitization where noise immunity and minimal wiring are critical.

Technical Context

The TLV0834IN implements a sample-data-comparator SAR architecture with an internal resistive ladder and successive-approximation register. Its 4-channel analog multiplexer is controlled via a 3–4-bit serial address word shifted in on DI synchronized to CLK, with CS enabling logic and initiating conversion upon start-bit detection.

Conversion begins after multiplexer settling (one clock period), outputs MSB-first data on DO, and completes in exactly eight clock periods. SARS asserts high during conversion and returns low upon completion; DO enters high-impedance state when CS goes high, clearing internal registers.

Key Specifications

Pinout & Package

TLV0834IN is housed in a 14-pin plastic dual in-line package (PDIP-N), with 0.3-inch body width and through-hole mounting. Pin 1 is located at the top-left corner (notch side up), and all pins are electrically defined per TI SLAS147B datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-channel, 8-bit serial ADC applications.

Compared with TLV0834ID and ADC0834CN, the TLV0834IN provides unique value in through-hole-reliable industrial deployment at 3 V, combining ratiometric operation, software-configurable inputs, and guaranteed –40°C to +85°C performance without external reference or level translation.

Availability

TLV0834IN is available at Aetrix Electronics and suitable for industrial sensor interface, embedded data acquisition, motor control feedback, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV0834IN 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 ADC design heritage.

The TLV0834IN belongs to TI's low-voltage precision ADC product line, engineered for cost-sensitive, space-constrained industrial and embedded systems requiring robust serial-interface digitization without external references or complex support circuitry.

FAQ

What is the maximum clock frequency supported by TLV0834IN?

The TLV0834IN supports up to 600 kHz clock frequency when operated at V_CC = 3.3 V, and up to 250 kHz at V_CC = 2.7 V. The clock duty cycle must be maintained between 40% and 60% for reliable operation across the full temperature range. At 600 kHz, conversion time reduces to approximately 13.3 µs (8 clock cycles), enabling higher sampling rates in time-critical applications. This specification is confirmed in the "Recommended Operating Conditions" table of the SLAS147B datasheet.

Does TLV0834IN require an external voltage reference?

No, the TLV0834IN does not require an external voltage reference. It operates ratiometrically using V_CC as the reference, meaning the full-scale input range is 0 V to V_CC. The REF pin may be connected directly to V_CC or to an external precision reference if improved absolute accuracy is needed. This dual-mode capability is explicitly stated in the device description and functional block diagram of the TLV0834IN datasheet.

Can TLV0834IN perform differential measurements between non-adjacent channels?

No, the TLV0834IN only supports differential measurements between adjacent channel pairs: CH0–CH1 and CH2–CH3. The multiplexer-address control logic (Table on page 4 of SLAS147B) defines fixed differential pairings, and polarity assignment is limited to those pairs. Pseudodifferential mode - where one channel serves as common negative input for all others - is not supported on the TLV0834IN; that feature is exclusive to the 8-channel TLV0838 family.

What is the purpose of the SARS pin on TLV0834IN?

The SARS (Successive Approximation Register Status) pin on TLV0834IN is an open-drain, active-high output that asserts high during conversion and returns low upon completion. It provides hardware-ready signaling to the host controller, eliminating the need for polling DO or timing-based delays. SARS remains asserted for exactly eight clock periods after the start bit reaches the internal register, aligning precisely with the MSB-first data output sequence. This behavior is documented in the "Functional Description" and "Sequence of Operation" sections of the TLV0834IN datasheet.

Is TLV0834IN pin-compatible with ADC0834?

Yes, the TLV0834IN is functionally equivalent to the ADC0834 at 3-V supply and shares identical pinout and serial protocol, but omits the internal Zener regulator network. This makes TLV0834IN fully compatible with ADC0834 layouts and firmware, provided the system operates within 2.7–3.6 V and does not rely on the ADC0834's internal 5-V reference. The datasheet explicitly states this functional equivalence in the first paragraph of the "Description" section.