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Texas Instruments TLV0838IPW
- Part No.:
- TLV0838IPW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLV0838IPW.pdf
- Description:
- IC ADC 8BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,531
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Product details
Overview
TLV0838IPW from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter (ADC) with integrated 8-channel multiplexer, serial control interface, and operation over 2.7 V to 3.6 V supply. It supports single-ended, differential, and pseudodifferential input configurations, delivers ±1 LSB total unadjusted error, 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 TLV0838IPW datasheet, TLV0838IPW pinout, TLV0838IPW application, or TLV0838IPW equivalent, this page provides verified technical context, validated pin functions, confirmed operating specifications across –40°C to 85°C, and real-world design implications for microprocessor-interfaced ADC selection.
Technical Context
The TLV0838IPW implements a sample-data comparator architecture with SAR conversion logic, using a 9-bit internal shift register for serial address/data transfer. Its multiplexer supports software-configurable channel selection (CH0–CH7), polarity assignment, and COM-based pseudodifferential mode - enabling rejection of common-mode offsets in biased analog front-ends.
Serial communication uses a start-bit + 3–4-bit address sequence on DI, with MSB-first or LSB-first output on DO controlled by SE pin state. Conversion is initiated by CS low, synchronized to external clock edges, and includes automatic 1-clock-cycle multiplexer settling delay before SAR comparison begins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes for full-scale analog input range. |
| Supply Voltage Range | 2.7 V to 3.6 V - compatible with modern 3.3-V logic and battery-powered systems without level-shifting. |
| Conversion Time | 32 µs at fCLK = 250 kHz - enables up to ~31.25 kSPS sampling rate in continuous mode. |
| Total Unadjusted Error | ±1 LSB - guarantees monotonicity and eliminates need for system-level calibration in most applications. |
| Input Channels | 8 single-ended or 4 differential pairs - supports multi-sensor monitoring with shared ADC resource. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive under-hood environments. |
| Reference Configuration | Ratiometric or independent VREF - allows full 8-bit encoding of sub-VCC analog spans (e.g., 0–2.5 V with 3.3-V supply). |
Pinout & Package
TSSOP-20 package (PW), 0.65 mm pitch, 6.5 mm × 4.4 mm body, exposed pad not present, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog Input Channels | Eight configurable analog inputs; each may be assigned as positive/negative terminal in differential mode or as single-ended input relative to COM or AGND. |
| COM | Common Analog Reference | Provides pseudodifferential reference point for all channels - enables biasing above ground (e.g., 1.65 V mid-rail) without external op-amp circuitry. |
| DGTL GND / ANLG GND | Digital and Analog Ground Returns | Separate ground pins minimize digital switching noise coupling into analog conversion path - requires star grounding or split-plane layout for optimal SNR. |
| VCC | Power Supply | Single 2.7–3.6 V supply powers both analog and digital sections - no separate AVDD/DVDD required. |
| REF | Reference Voltage Input | Accepts external reference (0 V to VCC) or connects to VCC for ratiometric operation - sets full-scale encoding range. |
| CS | Chip Select | Active-low enable; must remain low throughout conversion - controls internal logic activation and DO/SARS output states. |
| DI / DO | Serial Data In / Out | Shared bidirectional serial interface; DI accepts address bits during setup, DO outputs conversion result MSB-first unless SE configures LSB-first mode. |
| CLK | Serial Clock Input | Synchronizes all serial transfers and internal SAR timing - supports 10–600 kHz depending on VCC; duty cycle must be 40–60%. |
| SARS | SAR Status Output | Active-high open-drain signal indicating conversion in progress - used for handshaking or interrupt-driven firmware polling. |
| SE | Serial Output Format Control | Configures DO output order: high = MSB-first; low = LSB-first after initial MSB-first stream - enables compatibility with varied microcontroller SPI modes. |
Key Features
| Feature | Design Value |
|---|---|
| Software-Configurable Multiplexer | Enables runtime reconfiguration of input type (single-ended/differential/pseudodifferential) and channel selection via serial command - reduces need for external analog switches. |
| MSB-First or LSB-First Serial Output | SE pin selects output format without changing firmware - simplifies integration with diverse MCU SPI peripherals that lack bit-order flexibility. |
| Ratiometric or Independent Reference Support | Eliminates need for precision external reference when measuring sensors with matching excitation voltage - improves system accuracy and cost efficiency. |
| Low-Power Operation | 0.2–0.75 mA typical supply current at 3.3 V - suitable for battery-backed data loggers and energy-constrained edge nodes. |
| TTL/MOS-Compatible I/O | Inputs accept 0.8 V/2.0 V thresholds and outputs drive 1.6 mA sink / 360 µA source - interoperable with legacy 5-V microcontrollers via direct connection or minimal level translation. |
Applications
| Industrial Sensor Monitoring | Embedded Data Acquisition |
|---|---|
|
Use Scenario: Continuous voltage measurement from 8 temperature, pressure, or current sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Central 8-channel ADC performing sequential conversions triggered by microcontroller SPI commands; SARS signals completion for DMA-ready data capture. Use Value: Reduces BOM count vs. eight single-channel ADCs; pseudodifferential mode rejects common-mode noise from long sensor cables in factory-floor environments. |
Use Scenario: Portable environmental monitor logging temperature, humidity, light, and CO₂ using analog-output sensors. IC Role / Device Role / Timing Role: Low-power ADC interfaced to ARM Cortex-M0+ via 3-wire SPI; operates from 3.3-V Li-ion supply with CS-controlled sleep/wake cycles. Use Value: 0.2 mA typical ICC extends battery life; ±1 LSB error ensures calibrated sensor outputs meet Class II accuracy requirements without post-processing correction. |
| Automotive Body Control | Test & Measurement Front-End |
|
Use Scenario: Cabin climate control unit reading thermistor networks, potentiometer positions, and HVAC actuator feedback. IC Role / Device Role / Timing Role: Ratiometric ADC using same 3.3-V supply for sensors and reference - immune to rail droop during load dump transients. Use Value: –40°C to +85°C qualification meets AEC-Q100 Grade 3 requirements; COM pin enables offset compensation for sensors biased at 1.5 V. |
Use Scenario: Benchtop multimeter or oscilloscope auxiliary input channel digitizing DC/low-frequency analog signals. IC Role / Device Role / Timing Role: High-fidelity ADC with differential input support for rejecting power-supply ripple and EMI in lab-grade instruments. Use Value: Differential nonlinearity ≤ ±0.5 LSB (typ) ensures accurate low-amplitude waveform reconstruction; REF pin allows scaling to 100-mV full-scale for millivolt-range measurements. |
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 |
|---|---|---|---|
| TLV0838CPW | Same architecture and pinout, but rated for 0°C to 70°C only; lower temperature grade. | Not suitable for extended-temperature industrial or automotive use cases. | Select TLV0838CPW only for commercial-grade applications where ambient temperature remains within 0–70°C. |
| ADS7822U | 8-bit, 200-kSPS SAR ADC with SPI interface; 2.7–5.25 V supply; ±0.5 LSB INL; no built-in multiplexer. | Requires external analog multiplexer for multi-channel use; higher speed but less integrated functionality. | Choose ADS7822U when higher throughput (>30 kSPS) is critical and channel count is fixed or managed externally. |
Compared with TLV0838CPW, TLV0838IPW adds extended temperature capability essential for harsh environments; compared with ADS7822U, it integrates an 8-channel mux and pseudodifferential mode - reducing component count and PCB area at the cost of slightly lower maximum sampling rate.
Availability
TLV0838IPW is available at Aetrix Electronics and suitable for industrial sensor monitoring, embedded data acquisition, automotive body control, and test & measurement front-end applications requiring stable component supply and long-term lifecycle support.
Supply support for TLV0838IPW 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 over 50 years of innovation in precision data converters and industrial-grade ICs.
The TLV0838IPW belongs to TI's TLV083x family of low-voltage serial ADCs designed specifically for space-constrained, power-sensitive systems needing flexible analog input handling without external support components.
FAQ
What is the maximum clock frequency supported by TLV0838IPW?
The TLV0838IPW supports up to 600 kHz clock frequency when operated at VCC = 3.3 V, per the recommended operating conditions table. At VCC = 2.7 V, the maximum is 250 kHz. Exceeding these limits may cause timing violations or conversion errors - always verify setup/hold times (tsu = 350 ns, th = 90 ns) in your controller's SPI peripheral configuration for TLV0838IPW.
Does TLV0838IPW require an external voltage reference?
No, TLV0838IPW does not require an external voltage reference. It supports ratiometric operation by connecting REF to VCC, making the full-scale range equal to the supply voltage. An external reference (0 V to VCC) can be applied to REF for improved accuracy or scaled input ranges - e.g., 2.5 V reference enables precise 0–2.5 V measurement with TLV0838IPW.
How is differential input configured on TLV0838IPW?
Differential input on TLV0838IPW is configured via the 3-bit serial address word sent on DI during CS low. Adjacent channel pairs (e.g., CH0/CH1, CH2/CH3) are assigned as differential inputs, with polarity selected per pair. The COM pin is unused in true differential mode. Full configuration details are specified in the TLV0838 MUX-Address Control Logic Table in the SLAS147B datasheet for TLV0838IPW.
What is the function of the SE pin on TLV0838IPW?
The SE (Serial Output Enable) pin on TLV0838IPW controls the bit order of data output on DO. When SE = high, DO outputs MSB-first. When SE transitions low *before* conversion starts, DO outputs LSB-first after the initial MSB-first byte - enabling compatibility with MCUs whose SPI hardware expects LSB-first framing. SE has no effect on DI input timing or address loading for TLV0838IPW.
Is TLV0838IPW pin-compatible with ADC0838?
TLV0838IPW is functionally equivalent to ADC0838 at 3-V supply but is not pin-compatible. ADC0838 uses a 20-pin PDIP or SOIC-DW package with different pin assignments (e.g., no SE pin, different CLK/DO routing). TLV0838IPW uses TSSOP-20 with dedicated SE, COM, and separated DGTL/ANLG GND pins - requiring PCB layout revision for replacement. Functional equivalence refers only to serial protocol and conversion behavior, not mechanical or electrical pin mapping for TLV0838IPW.
TLV0838IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV0838IPW FAQ
1.How can I place an order for TLV0838IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV0838IPW 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 TLV0838IPW reliable?
The price and inventory of TLV0838IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV0838IPW is usually 5 days.
3.What payment methods are accepted for TLV0838IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV0838IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV0838IPW?
TLV0838IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV0838IPW 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 TLV0838IPW?
For technical support, including TLV0838IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV0838IPW requirements.
6.How does Aetrix verify that TLV0838IPW is sourced from the original manufacturer or authorized distributors?
All TLV0838IPW 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 TLV0838IPW meets industry standards.
7.What is the process for return or replacement of TLV0838IPW?
All TLV0838IPW units undergo pre-shipment inspection (PSI). If there is an issue with TLV0838IPW, 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 TLV0838IPW part is unused and in its original packaging.
Return procedure for TLV0838IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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