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Texas Instruments TLV0838IDWG4
- Part No.:
- TLV0838IDWG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLV0838IDWG4.pdf
- Description:
- IC ADC 8BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,592
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Product details
Overview
TLV0838IDWG4 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, 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 TLV0838IDWG4 datasheet, TLV0838IDWG4 pinout, TLV0838IDWG4 application, or TLV0838IDWG4 equivalent, this page provides verified technical context, validated pin functions, confirmed operating temperature range (–40°C to +85°C), package-specific terminal mapping (TSSOP-20), and real-world alternative part comparisons for design-in decisions.
Technical Context
The TLV0838IDWG4 implements a sample-data comparator architecture with SAR conversion logic, using an internal resistive ladder and successive-approximation register. Its multiplexer is software-configurable via serial shift register (DI/CLK/CS), supporting 8 analog inputs with polarity-selectable differential pairs (e.g., CH0/CH1) or pseudodifferential mode referenced to COM.
Serial communication uses MSB-first or LSB-first output (controlled by SE pin), with SARS indicating conversion progress and DO entering high-impedance state when CS is high. Input range is 0 V to VCC with external reference (REF), and digital I/O is TTL/MOS compatible - enabling direct microprocessor interfacing without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes across full-scale input range |
| Supply Voltage Range | 2.7 V to 3.6 V - compatible with 3-V system rails and battery-powered designs |
| Total Unadjusted Error | ±1 LSB - includes offset, full-scale, linearity, and multiplexer errors; no calibration required for basic accuracy |
| Conversion Time | 32 µs at fCLK = 250 kHz - fixed 8-clock-cycle timing enables deterministic sampling intervals |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Input Channels | 8-channel multiplexer - supports single-ended, differential (adjacent pairs), or pseudodifferential (COM-referenced) configurations |
| Reference Interface | Voltage reference input (REF) - allows full 8-bit encoding of any analog span ≤ VCC, enabling precision scaling |
Pinout & Package
TSSOP-20 package (20-pin thin shrink small-outline package) with 0.65 mm pitch, moisture sensitivity level 1, and lead finish NIPDAU. Pin 1 located in Q1 quadrant per tape-and-reel standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight configurable analog inputs; each can be assigned as positive/negative terminal in differential mode or single-ended source |
| COM | Common analog reference | Used as shared negative input for pseudodifferential mode; accepts arbitrary bias voltage common to all channels |
| DGTL GND | Digital ground | Return path for digital logic circuits; must be separated from ANLG GND to minimize noise coupling |
| ANLG GND | Analog ground | Return path for analog circuitry and reference; star-point connection recommended for precision applications |
| VCC | Power supply | 2.7–3.6 V digital/analog supply; powers internal logic, SAR, and reference buffer |
| CS | Chip select | Active-low enable; must remain low throughout conversion; clears registers on rising edge |
| DI | Serial data input | Accepts 5-bit multiplexer address and start bit during addressing phase; ignored during conversion |
| CLK | Serial clock input | Drives internal shift register and SAR logic; 10–600 kHz range depending on VCC |
| SARS | Start-of-conversion status | Active-high open-drain output signaling conversion in progress; used for synchronization or interrupt generation |
| DO | Serial data output | MSB-first or LSB-first digital result; enters high-impedance state when CS is high |
| SE | Output format control | Low = LSB-first output; high = MSB-first output; determines data ordering for processor interface alignment |
| REF | Reference voltage input | Defines full-scale range; ratiometric to VCC or externally driven; input resistance 1.3–5.9 kΩ |
| NC | No internal connection | Two pins (pins 12 and 13) are unconnected; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable multiplexer | Enables runtime reconfiguration of input type (single-ended/differential/pseudodifferential) and channel selection via serial command |
| Ratiometric or external reference operation | Supports direct VCC referencing for simplified power supply design or precise external REF for calibrated measurement spans |
| Remote serial data link | Eliminates long analog traces; places ADC near sensors and transmits noise-immune digital data over distance |
| TTL/MOS-compatible I/O | Direct interface with 3.3-V microcontrollers and FPGAs without level translators or pull-up resistors |
| Low-power operation | Typical ICC = 0.75 mA at 3.3 V enables use in power-constrained industrial and portable instrumentation |
Applications
| Industrial Sensor Signal Conditioning | Embedded Data Acquisition Systems |
|---|---|
Use Scenario: Monitoring temperature, pressure, and current in PLC I/O modules with multiple analog field inputs. IC Role / Device Role / Timing Role: 8-channel ADC digitizes sensor outputs with programmable input configuration and serial output synchronized to host controller clock. Use Value: Reduces component count by integrating multiplexer and serial interface; supports –40°C to +85°C ambient operation without thermal drift compensation. |
Use Scenario: Compact environmental monitoring node collecting data from thermistors, strain gauges, and humidity sensors. IC Role / Device Role / Timing Role: Successive-approximation ADC provides deterministic 32 µs conversion latency for time-critical sampling sequences. Use Value: Enables battery-powered operation with sub-1 mA typical supply current and flexible reference scaling for varying sensor output ranges. |
| Automotive Body Control Modules | Medical Diagnostic Equipment |
Use Scenario: Reading potentiometer-based position feedback and switch status in seat/mirror control units. IC Role / Device Role / Timing Role: Configurable 8-channel input handles mixed-signal sources; serial interface minimizes wiring harness complexity. Use Value: Qualified for –40°C to +85°C operation meets automotive under-hood requirements; ±1 LSB accuracy ensures reliable threshold detection. |
Use Scenario: Front-end digitization of ECG, pulse oximetry, and respiration signals in portable diagnostic devices. IC Role / Device Role / Timing Role: Pseudodifferential mode referenced to COM rejects common-mode noise from biopotential electrodes. Use Value: Eliminates need for external instrumentation amplifiers in low-noise signal chains; ratiometric operation maintains accuracy across battery voltage decay. |
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 |
|---|---|---|---|
| TLV0838IPWR | Same die, identical electrical specs, TSSOP-20 package, 2000-piece tape-and-reel - differs only in packaging suffix (G4 vs. standard) | No functional difference; both rated for –40°C to +85°C and share identical pinout and timing | Select TLV0838IPWR for standard reel packaging; TLV0838IDWG4 is functionally identical with same RoHS/NIPDAU finish and MSL-1 rating |
| ADS7822U | 8-bit SAR ADC with SPI interface, 200 kSPS max, 2.7–5.25 V supply, but no integrated multiplexer - requires external analog switching | Lacks on-chip 8-channel MUX; suited for single-input or externally multiplexed systems where higher speed is prioritized over channel integration | Choose ADS7822U when >250 kSPS sampling or wider supply range is needed; TLV0838IDWG4 preferred when MUX integration reduces BOM and layout complexity |
Compared with TLV0838IPWR, TLV0838IDWG4 offers identical performance and compatibility, differing only in reel packaging designation; versus ADS7822U, TLV0838IDWG4 trades maximum throughput for integrated multiplexing and lower system-level component count in multi-sensor applications.
Availability
TLV0838IDWG4 is available at Aetrix Electronics and suitable for industrial automation, embedded instrumentation, and automotive body electronics requiring stable component supply, extended temperature support, and long-term production continuity.
Supply support for TLV0838IDWG4 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 industrial-grade ICs.
The TLV0838IDWG4 belongs to TI's legacy low-voltage ADC family designed for cost-sensitive, space-constrained applications needing integrated analog front-end functionality and robust serial interfacing - particularly in sensor-rich industrial and automotive subsystems.
FAQ
What is the operating temperature range of the TLV0838IDWG4?
The TLV0838IDWG4 is characterized for operation from –40°C to +85°C, making it suitable for industrial and automotive environments where extended thermal stability is required. This rating applies across all specified electrical parameters including conversion time, total unadjusted error, and reference input behavior - no derating is needed within this range.
Does the TLV0838IDWG4 require an external voltage reference?
No, the TLV0838IDWG4 supports ratiometric operation using VCC as the reference, but it also accepts an external reference voltage applied to the REF pin. When using external REF, the full-scale range becomes equal to that voltage, enabling precise scaling for narrow analog input spans - the input resistance to REF is 1.3–5.9 kΩ.
How does the SE pin affect data output format on the TLV0838IDWG4?
The SE (Serial Output Format Select) pin on the TLV0838IDWG4 controls whether conversion results are output MSB-first (SE = high) or LSB-first (SE = low). When SE is pulled low before initiating conversion, the 9-bit shift register outputs the least-significant bit first - critical for alignment with certain microcontroller SPI modes that expect LSB-first framing.
Can the TLV0838IDWG4 perform differential measurements between non-adjacent channels?
No, differential measurements on the TLV0838IDWG4 are restricted to adjacent channel pairs (e.g., CH0/CH1, CH2/CH3, etc.) as defined by the MUX-address control logic table. Each pair is hardwired for differential comparison; cross-pair or arbitrary differential configurations are not supported. Pseudodifferential mode using COM provides an alternative for referencing all channels to a common potential.
What is the minimum clock frequency supported by the TLV0838IDWG4 at 3.3 V supply?
At VCC = 3.3 V, the TLV0838IDWG4 supports a minimum clock frequency of 10 kHz. This allows ultra-low-power operation in battery-powered applications where reduced sampling rate extends system runtime - conversion time scales linearly with clock period, maintaining deterministic 8-clock-cycle timing regardless of frequency.
TLV0838IDWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
TLV0838IDWG4 FAQ
1.How can I place an order for TLV0838IDWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV0838IDWG4 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 TLV0838IDWG4 reliable?
The price and inventory of TLV0838IDWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV0838IDWG4 is usually 5 days.
3.What payment methods are accepted for TLV0838IDWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV0838IDWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV0838IDWG4?
TLV0838IDWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV0838IDWG4 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 TLV0838IDWG4?
For technical support, including TLV0838IDWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV0838IDWG4 requirements.
6.How does Aetrix verify that TLV0838IDWG4 is sourced from the original manufacturer or authorized distributors?
All TLV0838IDWG4 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 TLV0838IDWG4 meets industry standards.
7.What is the process for return or replacement of TLV0838IDWG4?
All TLV0838IDWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLV0838IDWG4, 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 TLV0838IDWG4 part is unused and in its original packaging.
Return procedure for TLV0838IDWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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