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Texas Instruments TLV0838CPWR
- Part No.:
- TLV0838CPWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLV0838CPWR.pdf
- Description:
- IC ADC 8BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,657
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Product details
Overview
TLV0838CPWR from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter (ADC) with integrated 8-channel multiplexer and 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, used in sensor signal acquisition systems requiring ratiometric operation and remote serial data link.
For engineers reviewing the TLV0838CPWR datasheet, TLV0838CPWR pinout, TLV0838CPWR application, or TLV0838CPWR equivalent, key selection considerations include its TSSOP-20 package, software-configurable single-ended/differential input modes, 0°C to 70°C temperature grade, and compatibility with microprocessor serial interfaces via DI/DO/CLK/CS lines.
Technical Context
The TLV0838CPWR implements a sample-data comparator architecture with internal SAR logic and resistive ladder, supporting pseudodifferential operation via dedicated COM terminal and polarity-selectable adjacent channel pairs (e.g., CH0/CH1). Its serial control protocol uses a start bit followed by 3–4-bit address word to configure channel selection and input mode before conversion initiation.
Conversion begins on CS low assertion and proceeds over eight clock cycles, outputting MSB-first data with SARS high during conversion; SE pin enables LSB-first data output. Input range is 0 V to VCC when using VCC as reference, and the device supports TTL/MOS-level compatible digital I/O with 350 ns setup time and 90 ns hold time for CLK transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes for precise quantization of analog sensor signals. |
| Supply Voltage Range | 2.7 V to 3.6 V - enables direct integration into 3-V systems without level-shifting or LDO overhead. |
| Conversion Time | 32 µs at fCLK = 250 kHz - supports up to ~31.25 kSPS sampling rate for real-time monitoring applications. |
| Total Unadjusted Error | ±1 LSB - ensures monotonicity and predictable code transition behavior without calibration. |
| Input Channels | 8-channel multiplexer with COM terminal - allows flexible single-ended, differential, or pseudodifferential configurations across all inputs. |
| Reference Configuration | Ratiometric or VCC-based - eliminates need for external precision reference when system VCC is stable. |
| Digital Interface | 4-wire serial (CS, DI, DO, CLK) - reduces PCB routing complexity and enables long-distance noise-immune communication. |
Pinout & Package
TSSOP-20 package (PW), 6.95 mm × 7.1 mm footprint, 0.65 mm pitch, lead-free NIPDAU finish, MSL Level-1, rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight configurable analog inputs; each can be assigned positive/negative polarity in differential mode or serve as single-ended input. |
| COM | Analog common input | Provides pseudodifferential reference point for all channels; supports biasing above ground (e.g., 1.5 V mid-rail). |
| DGTL GND / ANLG GND | Digital and analog ground | Separate ground pins minimize digital switching noise coupling into analog conversion path. |
| VCC | Power supply | Single 2.7–3.6 V rail powers both analog and digital sections; also serves as default reference source. |
| REF | Reference voltage input | Accepts external reference (up to VCC+0.05 V); enables full-scale encoding of sub-VCC analog spans. |
| CS | Chip select | Active-low enable; must remain low throughout conversion; clears internal registers when high. |
| DI | Serial data input | Receives start bit + 3–4-bit address word during multiplexer configuration phase only. |
| DO | Serial data output | Outputs MSB-first conversion result; enters high-impedance state when CS is high. |
| CLK | Serial clock input | Drives internal shift register and SAR logic; supports 10–600 kHz depending on VCC. |
| SARS | Start-of-conversion status | Active-high open-drain output indicating conversion in progress; used for timing synchronization. |
| SE | Output format control | When low, enables LSB-first data output after MSB-first stream; required for certain microcontroller interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Single-ended, differential (adjacent pairs), or pseudodifferential (via COM) - adapts to diverse sensor types without hardware changes. |
| Remote serial data link | Eliminates analog signal routing over PCB traces; places ADC near sensor to reduce noise pickup and improve SNR. |
| Low-power operation | 0.2–0.75 mA typical supply current - suitable for battery-powered data loggers and portable instrumentation. |
| TTL/MOS-compatible I/O | Supports direct connection to 3.3-V microcontrollers without level translators - simplifies interface design and BOM. |
| Internal multiplexer settling management | Automatic one-clock-cycle delay after channel selection - ensures accurate sampling without external timing firmware. |
Applications
| Industrial Sensor Interface | Automotive Cabin Monitoring |
|---|---|
|
Use Scenario: Acquisition of temperature, pressure, and humidity sensor outputs in programmable logic controllers (PLCs) with isolated fieldbus communication. IC Role / Device Role / Timing Role: 8-channel ADC digitizes multiple analog sensor signals, multiplexes them serially, and transmits noise-immune digital data to host MCU via RS-485 interface. Use Value: Reduces wiring count and EMI susceptibility by locating TLV0838CPWR at sensor nodes and transmitting digital data over long distances. |
Use Scenario: Cabin air quality sensing using CO₂, VOC, and relative humidity sensors in automotive HVAC control modules. IC Role / Device Role / Timing Role: TLV0838CPWR samples four analog gas sensor outputs and two thermistor channels, enabling closed-loop climate adjustment every 100 ms. Use Value: Pseudodifferential mode (COM referenced) rejects common-mode drift from shared 5-V supply rails in vehicle electrical systems. |
| Portable Medical Instrumentation | Energy Meter Front-End |
|
Use Scenario: Blood glucose meter with electrochemical test strip interface requiring low-noise, battery-efficient analog signal conditioning. IC Role / Device Role / Timing Role: TLV0838CPWR digitizes current-to-voltage converted strip response across multiple gain stages using programmable channel configuration. Use Value: ±1 LSB error and ratiometric operation ensure consistent measurement accuracy across varying battery voltage (2.7–3.6 V). |
Use Scenario: Residential smart meter measuring voltage, current, and neutral current via shunt/CT sensors under IEC 62053-21 compliance. IC Role / Device Role / Timing Role: TLV0838CPWR acquires six analog inputs (phase A/B/C voltages + currents) with synchronized sampling via external trigger. Use Value: Differential input capability enables rejection of common-mode noise induced by switching power supplies in metering environments. |
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 |
|---|---|---|---|
| ADC0838CN | Functionally equivalent at 3-V supply but includes internal Zener regulator network; requires higher supply current (~1.5 mA vs. 0.75 mA). | Designed for 5-V systems with internal 5-V reference; less suitable for native 3-V operation without regulator bypass. | Choose ADC0838CN only if legacy 5-V design reuse or internal reference stability outweighs power efficiency needs. |
| TLV0838IPWR | Identical architecture and pinout, but rated for –40°C to 85°C industrial temperature range and marked "TLV0838I". | Required for automotive under-hood, outdoor metering, or extended-temperature industrial deployments. | Select TLV0838IPWR when operating ambient exceeds 70°C or cold-start performance below 0°C is mandatory. |
Compared with TLV0838CPWR, ADC0838CN consumes more power and lacks native 3-V optimization, while TLV0838IPWR offers identical functionality with extended thermal reliability-making it the preferred drop-in upgrade for harsh environments.
Availability
TLV0838CPWR is available at Aetrix Electronics and suitable for industrial sensor interface, portable medical instrumentation, and energy meter front-end applications requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for TLV0838CPWR 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 TLV0838CPWR belongs to TI's TLV083x family of low-voltage serial ADCs, designed specifically for cost-sensitive, space-constrained applications where 3-V operation, software-configurable inputs, and serial interface simplicity are critical.
FAQ
What is the maximum clock frequency supported by TLV0838CPWR?
The TLV0838CPWR supports up to 600 kHz clock frequency when VCC = 3.3 V, enabling faster conversions than the nominal 250 kHz rating. At lower supply voltages (e.g., 2.7 V), maximum clock frequency drops to 250 kHz to maintain timing margins and conversion accuracy.
Does TLV0838CPWR require an external reference voltage?
No, TLV0838CPWR operates ratiometrically using VCC as reference, eliminating the need for external references in most applications. However, REF pin accepts an external reference (up to VCC+0.05 V) to encode smaller analog spans with full 8-bit resolution.
How does the COM pin function in TLV0838CPWR?
The COM pin serves as a common analog reference for pseudodifferential operation: all channels use COM as their negative input, allowing simultaneous measurement of multiple signals biased above ground (e.g., 1.5 V rail), improving noise immunity and dynamic range utilization.
Can TLV0838CPWR perform true differential measurements between non-adjacent channels?
No. TLV0838CPWR supports differential mode only between adjacent channel pairs (e.g., CH0/CH1, CH2/CH3) as defined by its internal multiplexer addressing logic. Non-adjacent or arbitrary channel pairing is not supported per the functional description and MUX-address tables.
What is the purpose of the SE pin on TLV0838CPWR?
The SE (Serial Enable) pin controls output data format: when held high, TLV0838CPWR outputs MSB-first data; when pulled low before conversion completion, it enables LSB-first output after the initial MSB stream-supporting compatibility with microcontrollers requiring LSB-first serial protocols.
TLV0838CPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV0838CPWR FAQ
1.How can I place an order for TLV0838CPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV0838CPWR 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 TLV0838CPWR reliable?
The price and inventory of TLV0838CPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV0838CPWR is usually 5 days.
3.What payment methods are accepted for TLV0838CPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV0838CPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV0838CPWR?
TLV0838CPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV0838CPWR 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 TLV0838CPWR?
For technical support, including TLV0838CPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV0838CPWR requirements.
6.How does Aetrix verify that TLV0838CPWR is sourced from the original manufacturer or authorized distributors?
All TLV0838CPWR 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 TLV0838CPWR meets industry standards.
7.What is the process for return or replacement of TLV0838CPWR?
All TLV0838CPWR units undergo pre-shipment inspection (PSI). If there is an issue with TLV0838CPWR, 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 TLV0838CPWR part is unused and in its original packaging.
Return procedure for TLV0838CPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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