My Inquiry
My Account
Texas Instruments ADC0838CCWM/NOPB
- Part No.:
- ADC0838CCWM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADC0838CCWM/NOPB.pdf
- Description:
- IC ADC 8BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,881
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADC0838CCWM/NOPB from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter with an integrated 8-channel analog multiplexer, serial MICROWIRE-compatible interface, single 5 V supply operation, ±1 LSB total unadjusted error, and 32 μs conversion time. It supports software-configurable single-ended, differential, and pseudo-differential input modes for sensor signal acquisition in embedded data loggers.
For engineers reviewing the ADC0838CCWM/NOPB datasheet, ADC0838CCWM/NOPB pinout, ADC0838CCWM/NOPB application, or ADC0838CCWM/NOPB equivalent, key selection considerations include its 8-channel MUX flexibility, ratiometric or absolute reference operation, TTL/MOS I/O compatibility, SOIC-20 package, and support for remote analog sensing via serial digital link.
Technical Context
The ADC0838CCWM/NOPB implements a sample-data comparator architecture with a resistor ladder DAC for successive approximation. Its 8-channel multiplexer is fully software-addressable via 4-bit shift-in command on the DI line, enabling dynamic reconfiguration between single-ended, differential (adjacent pairs only), and pseudo-differential modes per conversion cycle.
Digital interface compliance includes TI MICROWIRE protocol with CS-controlled start, MSB-first or LSB-first output (via SE pin), and TRI-STATE DO output. Internal shunt regulator allows operation from V+ up to 8.5 V while maintaining VCC within safe limits, supporting high-voltage supply environments without external regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - delivers 256 discrete digital codes over full-scale input range |
| Total Unadjusted Error | ±1 LSB - guarantees monotonicity and no missing codes across temperature (0°C to +70°C) |
| Conversion Time | 32 μs - fixed duration at 250 kHz clock; enables ≥31.25 kSPS throughput in burst mode |
| Supply Voltage | 4.5 V to 6.3 V - operates from standard 5 V rail with margin for ripple and drop |
| Input Range | 0 V to VCC - supports 0–5 V analog inputs with single 5 V supply; no negative rail required |
| Reference Mode | Ratiometric or fixed - VREF may tie to VCC (ratiometric) or precision source (absolute accuracy) |
| Power Dissipation | 15 mW typical - low quiescent current (2.5 mA max ICC) suits battery-powered systems |
Pinout & Package
ADC0838CCWM/NOPB is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package with 0.3-inch body width and standard gull-wing lead form. Pin functions are validated per TI SNAS531B Figure 1 (SOIC top view) and functional block diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive Supply | Primary 4.5–6.3 V power input; powers analog and digital sections; internal zener clamp referenced to GND |
| GND | Ground Reference | Analog and digital common return; COM pin internally tied to GND in default configuration |
| CLK | Serial Clock Input | Accepts 10–400 kHz square wave; controls MUX addressing timing and SAR conversion sequencing |
| CS | Chip Select | Active-low enable; must remain low for entire conversion; initiates MUX address latching and conversion start |
| DI | Data Input | Serial address/data line; accepts 4-bit MUX configuration word after leading '1' start bit |
| DO | Data Output | TRI-STATE serial output; delivers 8-bit result MSB-first by default; LSB-first when SE = low |
| SE | Shift Enable | Controls output format: high = MSB-first only; low = enables LSB-first shift-out after MSB stream |
| IN0–IN7 | Analog Inputs | Eight single-ended channels; configurable as four differential pairs (IN0/IN1, IN2/IN3, etc.) or pseudo-differential with COM |
| COM | Common Input | Internally connected to GND; serves as shared reference for pseudo-differential mode across all INx channels |
| VREF | Reference Input | Defines full-scale span; accepts 1.3–5.9 kΩ source impedance; may tie to VCC for ratiometric use |
| V+ | Optional High-Voltage Supply | Alternate power input (6.3–8.5 V); feeds internal shunt regulator to derive stable VCC; requires current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Software-Configurable 8-Channel MUX | Enables per-conversion selection of single-ended, differential, or pseudo-differential input mode without hardware change |
| MICROWIRE-Compatible Serial Interface | Direct connection to COPS-family processors; eliminates parallel bus overhead and reduces PCB trace count |
| Pseudo-Differential Input Architecture | Uses COM pin as programmable "−" reference for any INx channel, simplifying single-supply transducer interfacing |
| Internal Shunt Regulator Support | Allows operation from unregulated 6.3–8.5 V supplies via V+ pin, removing need for external LDO in high-voltage systems |
| No Zero or Full-Scale Adjustment Required | Factory-trimmed performance ensures ±1 LSB error without calibration circuitry or trim pots in production designs |
Applications
| Industrial Sensor Data Acquisition | Embedded Environmental Monitoring |
|---|---|
Use Scenario: Reading multiple RTD, thermistor, and pressure transducer outputs in a PLC analog input module. IC Role / Device Role / Timing Role: ADC0838CCWM/NOPB acts as central 8-channel A/D hub, sampling each sensor sequentially under microcontroller control via serial interface. Use Value: Eliminates need for external multiplexer and parallel ADC, reducing BOM count and layout area while maintaining 8-bit resolution across all channels. | Use Scenario: Battery-powered air quality node measuring CO, NO₂, and humidity using analog-output sensors. IC Role / Device Role / Timing Role: ADC0838CCWM/NOPB digitizes conditioned sensor outputs with ratiometric reference (VREF = VCC), rejecting supply variation effects. Use Value: 15 mW power consumption and single 5 V operation extend battery life; pseudo-differential mode rejects common-mode noise from shared sensor ground. |
| Automotive Subsystem Diagnostics | Legacy Equipment Analog Interface Retrofit |
Use Scenario: Monitoring engine bay temperature, coolant level, and battery voltage in non-critical automotive ECUs. IC Role / Device Role / Timing Role: ADC0838CCWM/NOPB interfaces directly to sensor signals with built-in MUX, feeding digitized values to 8-bit MCU over minimal serial lines. Use Value: ±1 LSB error and −40°C to +85°C qualified variants (not CCWM) ensure reliable readings; SOIC-20 eases hand-soldering during prototyping. | Use Scenario: Upgrading vintage test equipment with analog meter movements to digital readout using existing analog signal paths. IC Role / Device Role / Timing Role: ADC0838CCWM/NOPB replaces obsolete discrete ADC/mux combos, accepting legacy 0–5 V signals and outputting serial data to modern display controller. Use Value: Pin-compatible replacement path exists for ADC0838BCN/CCN; identical SOIC-20 footprint and timing allow drop-in board-level upgrade without redesign. |
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 |
|---|---|---|---|
| ADC0838CCN | Same functionality and pinout; PDIP-20 package instead of SOIC-20; rated for −40°C to +85°C industrial temp range | Suitable for higher-reliability industrial or automotive under-hood use where extended temperature and through-hole assembly are required | Select ADC0838CCN for extended temperature operation or manual soldering; ADC0838CCWM/NOPB preferred for surface-mount volume production |
| ADC0838BCV | Same SOIC-20 package; tighter ±½ LSB total unadjusted error spec; rated for −40°C to +85°C; higher-grade process | Used where improved DC accuracy is critical-e.g., calibrated instrumentation front-ends requiring <±0.5% FS error | Choose ADC0838BCV when ±½ LSB error is mandatory; ADC0838CCWM/NOPB suffices for general-purpose control and monitoring |
Compared with ADC0838CCN and ADC0838BCV, the ADC0838CCWM/NOPB offers commercial-temperature SOIC packaging optimized for cost-sensitive, space-constrained embedded systems where ±1 LSB accuracy meets design requirements without premium grading or extended thermal range.
Availability
ADC0838CCWM/NOPB is available at Aetrix Electronics and suitable for industrial sensor data acquisition, embedded environmental monitoring, and legacy equipment analog interface retrofit requiring stable component supply and long-term manufacturability.
Supply support for ADC0838CCWM/NOPB 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and broad application support.
The ADC083x-N series was designed for cost-effective, low-power, multi-channel analog sensing in resource-constrained microcontroller-based systems-emphasizing serial interface simplicity, flexible input configuration, and single-supply operation.
FAQ
What is the operating temperature range for ADC0838CCWM/NOPB?
The ADC0838CCWM/NOPB is specified for 0°C to +70°C ambient operation. This commercial-grade temperature range aligns with typical office, laboratory, and indoor industrial environments. The device uses the CCWM suffix to denote this rating, distinct from the CCN (−40°C to +85°C) and BCV (−40°C to +85°C, ±½ LSB) variants. Always verify thermal derating in high-power-density layouts.
Does ADC0838CCWM/NOPB require external zero or full-scale calibration?
No, ADC0838CCWM/NOPB does not require external zero or full-scale adjustment. It is factory trimmed to deliver ±1 LSB total unadjusted error across temperature, covering offset, full-scale, linearity, and multiplexer errors. The design eliminates trim potentiometers or calibration firmware steps, reducing production test time and field drift concerns in the ADC0838CCWM/NOPB implementation.
Can ADC0838CCWM/NOPB operate with a 3.3 V supply?
No, ADC0838CCWM/NOPB is not rated for 3.3 V operation. Its absolute minimum supply voltage is 4.5 VDC, and maximum is 6.3 VDC per the Operating Ratings table. Attempting 3.3 V operation will result in undefined behavior, failed conversions, or latch-up. For 3.3 V systems, consider newer alternatives like the ADS7822 or MCP3008, as the ADC0838CCWM/NOPB requires a true 5 V rail.
How does the pseudo-differential mode work on ADC0838CCWM/NOPB?
In pseudo-differential mode, the COM pin (internally tied to GND) serves as the common "−" reference for any selected INx channel (IN0–IN7). The ADC0838CCWM/NOPB computes the difference between the chosen channel voltage and COM, enabling rejection of common-mode noise when all sensors share the same reference potential. This avoids dedicated differential pairs while retaining noise immunity benefits in single-supply applications.
Is the SE pin on ADC0838CCWM/NOPB required for basic operation?
No, the SE (Shift Enable) pin is optional for basic operation. When left unconnected or held high, ADC0838CCWM/NOPB defaults to MSB-first output format, which is compatible with most microcontrollers. The SE pin is only needed to enable LSB-first output-useful when hardware shift registers or certain legacy peripherals require that ordering. Leaving SE open or pulled high ensures standard functionality without additional components.
ADC0838CCWM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- 4, 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:
- 4.5V ~ 6.3V
- Voltage - Supply, Digital:
- 4.5V ~ 6.3V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC0838CCWM/NOPB FAQ
1.How can I place an order for ADC0838CCWM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC0838CCWM/NOPB 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 ADC0838CCWM/NOPB reliable?
The price and inventory of ADC0838CCWM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC0838CCWM/NOPB is usually 5 days.
3.What payment methods are accepted for ADC0838CCWM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC0838CCWM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC0838CCWM/NOPB?
ADC0838CCWM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC0838CCWM/NOPB 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 ADC0838CCWM/NOPB?
For technical support, including ADC0838CCWM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC0838CCWM/NOPB requirements.
6.How does Aetrix verify that ADC0838CCWM/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC0838CCWM/NOPB 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 ADC0838CCWM/NOPB meets industry standards.
7.What is the process for return or replacement of ADC0838CCWM/NOPB?
All ADC0838CCWM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC0838CCWM/NOPB, 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 ADC0838CCWM/NOPB part is unused and in its original packaging.
Return procedure for ADC0838CCWM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADC0838CCWM/NOPB Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
