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Texas Instruments TLV0838IDWR
- Part No.:
- TLV0838IDWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLV0838IDWR.pdf
- Description:
- IC ADC 8BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,126
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Product details
Overview
TLV0838IDWR from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter (ADC) with integrated 8-channel multiplexer, serial interface, and ratiometric operation. It operates from 2.7 V to 3.6 V, delivers ±1 LSB total unadjusted error, achieves 32 µs conversion time at 250 kHz clock, and supports single-ended, differential, and pseudodifferential input configurations for sensor signal digitization in industrial monitoring systems.
For engineers reviewing the TLV0838IDWR datasheet, TLV0838IDWR pinout, TLV0838IDWR application, or TLV0838IDWR 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 data acquisition.
Technical Context
The TLV0838IDWR implements a sample-data-comparator SAR architecture with software-configurable multiplexer addressing via serial DI/CLK interface. Its 8-channel analog MUX supports channel selection, polarity assignment, and mode control (SGL/DIF/ODD/EVEN) using a 4-bit address word following a start bit.
Conversion is initiated by CS low, followed by clocked serial address loading; SARS goes high during conversion, and DO outputs MSB-first data after one clock period of multiplexer settling. The device accepts VCC as reference or external REF voltage, enabling full-scale encoding of sub-VCC analog spans.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes for precise sensor quantization |
| Supply Voltage Range | 2.7 V to 3.6 V - compatible with modern 3.3-V logic and battery-powered systems |
| Total Unadjusted Error | ±1 LSB - ensures monotonicity and ≤0.4% full-scale accuracy without calibration |
| Conversion Time | 32 µs at fCLK = 250 kHz - enables up to ~31.25 kSPS sampling in burst mode |
| Input Configuration | Single-ended, differential, or pseudodifferential - supports common-mode rejection and offset-tolerant sensing |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive under-hood environments |
| Reference Flexibility | VCC or external REF - allows ratiometric measurement or custom full-scale scaling |
Pinout & Package
TLV0838IDWR is housed in a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC outline. Pin 1 is located at the top-left corner with notch or dot marking; leads are gull-wing, RoHS-compliant NiPdAu finish, MSL Level-1 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog Input Channels | Eight configurable analog inputs; each can be assigned positive/negative polarity in differential pairs or referenced to COM in pseudodifferential mode |
| COM | Common Analog Input | Serves as shared negative reference for all channels in pseudodifferential configuration; enables biasing above ground |
| DGTL GND / ANLG GND | Digital & Analog Ground | Separate ground pins minimize digital switching noise coupling into analog conversion path |
| VCC | Power Supply | Primary supply for both digital logic and analog circuitry; also usable as internal reference source |
| REF | External Reference Input | Accepts independent voltage reference (e.g., precision bandgap) to set full-scale range independently of VCC |
| CS | Chip Select | Active-low enable; must remain low throughout conversion; clears registers when high |
| DI | Serial Data Input | Accepts 4-bit MUX address + start bit; sampled on CLK rising edge during addressing phase |
| CLK | Serial Clock Input | Controls timing of address loading and data output; supports 10–600 kHz depending on VCC |
| SARS | Start-of-Conversion Status | Open-drain output goes high during conversion; used for handshaking or interrupt generation |
| DO | Serial Data Output | MSB-first 8-bit result; tri-states when CS high or during address loading; supports bidirectional I/O sharing with DI |
| SE | Output Format Control | When low, enables LSB-first data output mode; when high, defaults to MSB-first (standard) |
Key Features
| Feature | Design Value |
|---|---|
| Software-Configurable MUX | Enables runtime reconfiguration of input count, polarity, and mode without hardware changes |
| Ratiometric Operation | Eliminates gain drift errors when sensor excitation and ADC reference share same supply |
| Remote Serial Interface | Allows physical separation of ADC from controller-reducing noise pickup on analog traces |
| Differential Input Support | Rejects common-mode noise up to ±VCC/2, critical for noisy industrial transducer signals |
| Low-Power Standby Current | Sub-µA standby current per inactive channel reduces system power in multi-sensor polling schemes |
Applications
| Industrial Sensor Hub | Automotive Cabin Monitoring |
|---|---|
|
Use Scenario: Centralized acquisition of temperature, pressure, and humidity sensors across factory floor equipment. IC Role / Device Role / Timing Role: 8-channel ADC digitizes multiple analog sensor outputs sequentially via software-controlled MUX addressing. Use Value: Single TLV0838IDWR replaces eight discrete ADCs, reducing BOM count and PCB area while maintaining ±1 LSB accuracy across –40°C to 85°C. |
Use Scenario: Cabin air quality module measuring CO₂, VOC, and ambient temperature in vehicle HVAC systems. IC Role / Device Role / Timing Role: Pseudodifferential mode uses COM pin to bias all sensor signals above ground, rejecting chassis noise. Use Value: Ratiometric operation with 3.3-V supply eliminates need for separate reference IC, simplifying layout and improving long-term stability. |
| Programmable Logic Controller (PLC) Input Module | Portable Battery-Powered Data Logger |
|
Use Scenario: Modular I/O card accepting 0–10 V or 4–20 mA field signals from industrial actuators and transmitters. IC Role / Device Role / Timing Role: Differential input pairs (e.g., CH0+/CH1–) reject ground loop interference in long cable runs. Use Value: ±1 LSB error and 32 µs conversion support fast scan cycles required for real-time control loops in PLC backplanes. |
Use Scenario: Compact environmental logger recording soil moisture, light, and temperature over weeks on coin-cell power. IC Role / Device Role / Timing Role: Low 0.2–0.75 mA supply current and software-selectable channel activation minimize average power draw. Use Value: Serial interface reduces GPIO count on host MCU, enabling use of ultra-low-pin-count microcontrollers like MSP430FR2xx. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV0838IPW | TSSOP-20 package (4.4 mm × 6.5 mm), smaller footprint, same electrical specs and temperature grade | Better suited for space-constrained portable designs; requires tighter layout control for thermal management | Select when board area is constrained and reflow profile supports TSSOP MSL-1 handling |
| ADC0838CN | Legacy 5-V-only operation (4.5–5.5 V), no 3-V compatibility; identical pinout but incompatible supply domain | Requires level-shifting or separate 5-V rail; not suitable for mixed-voltage 3.3-V systems | Choose only for legacy 5-V redesigns where supply infrastructure already exists |
Compared with TLV0838IPW, TLV0838IDWR offers greater mechanical robustness and easier hand-soldering due to SOIC lead geometry; compared with ADC0838CN, it enables direct integration into modern low-voltage embedded systems without voltage translation overhead.
Availability
TLV0838IDWR is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive cabin monitoring modules, and programmable logic controller input cards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLV0838IDWR 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 precision data converter heritage.
The TLV0838IDWR belongs to TI's low-voltage precision ADC family designed for cost-sensitive, power-conscious industrial and automotive signal acquisition where 3-V operation and serial interface simplicity are essential.
FAQ
What is the maximum clock frequency supported by TLV0838IDWR?
The TLV0838IDWR supports up to 600 kHz clock frequency when VCC = 3.3 V, enabling faster conversions than the base 250 kHz specification. At lower supply voltages (e.g., 2.7 V), the maximum clock drops to 250 kHz to ensure reliable internal timing margins. This scalability allows designers to optimize speed versus power trade-offs based on system requirements.
Does TLV0838IDWR require an external reference voltage?
No, TLV0838IDWR does not require an external reference voltage. It operates ratiometrically using VCC as the reference, or accepts an external REF voltage for independent full-scale scaling. When REF is left unconnected and VCC is used, the device maintains accurate 0–VCC input range mapping with ±1 LSB total unadjusted error across its operating temperature range.
How does the pseudodifferential mode work on TLV0838IDWR?
In pseudodifferential mode, the COM pin serves as a common negative reference for all eight channels. Each channel (CH0–CH7) becomes the positive input relative to COM, allowing simultaneous digitization of signals biased above ground-such as op-amp outputs or sensor bridges with non-zero common-mode voltage. This mode is enabled via specific MUX address bits and requires COM to be driven to a stable potential.
Can TLV0838IDWR interface directly with a microcontroller GPIO without level shifters?
Yes, TLV0838IDWR inputs and outputs are TTL- and MOS-compatible, supporting direct connection to 3.3-V microcontrollers. VIH is guaranteed ≥2.0 V and VOL ≤0.4 V at 1.6 mA sink, ensuring robust logic-level interoperability. No level shifters are needed when interfacing with standard 3.3-V MCUs such as STM32, MSP430, or PIC32 series.
What is the function of the SE pin on TLV0838IDWR?
The SE (Serial Enable) pin controls data output format: when held high, TLV0838IDWR outputs conversion results MSB-first; when pulled low before conversion completion, it enables LSB-first output mode. This flexibility allows alignment with MCU serial peripheral expectations-especially useful for legacy controllers expecting least-significant-bit-aligned data streams.
TLV0838IDWR 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:
- 8
- Sampling Rate (Per Second):
- 37.9k
- Number of Inputs:
- 4, 7, 8
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV0838IDWR FAQ
1.How can I place an order for TLV0838IDWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV0838IDWR 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 TLV0838IDWR reliable?
The price and inventory of TLV0838IDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV0838IDWR is usually 5 days.
3.What payment methods are accepted for TLV0838IDWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV0838IDWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV0838IDWR?
TLV0838IDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV0838IDWR 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 TLV0838IDWR?
For technical support, including TLV0838IDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV0838IDWR requirements.
6.How does Aetrix verify that TLV0838IDWR is sourced from the original manufacturer or authorized distributors?
All TLV0838IDWR 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 TLV0838IDWR meets industry standards.
7.What is the process for return or replacement of TLV0838IDWR?
All TLV0838IDWR units undergo pre-shipment inspection (PSI). If there is an issue with TLV0838IDWR, 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 TLV0838IDWR part is unused and in its original packaging.
Return procedure for TLV0838IDWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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