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Texas Instruments ADC0831CCWMX/NOPB
- Part No.:
- ADC0831CCWMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADC0831CCWMX/NOPB.pdf
- Description:
- IC ADC 8BIT SAR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:262
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Product details
Overview
ADC0831CCWMX/NOPB from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter with single differential input, serial MICROWIRE-compatible interface, and ratiometric operation using a single 5 V supply. It delivers ±1 LSB total unadjusted error, 32 μs conversion time, and operates without zero or full-scale adjustment in industrial temperature range (0°C to +70°C) within an 8-pin SOIC package.
For engineers reviewing the ADC0831CCWMX/NOPB datasheet, ADC0831CCWMX/NOPB pinout, ADC0831CCWMX/NOPB application, or ADC0831CCWMX/NOPB equivalent, key selection considerations include its fixed single-differential input architecture, absence of MUX addressing logic, MSB-first serial output only, and compatibility with microcontrollers lacking dedicated SPI peripherals via bit-banged GPIO.
Technical Context
The ADC0831CCWMX/NOPB implements a sample-data comparator structure with internal resistor ladder for successive approximation. Its analog input pair (VIN(+) and VIN(−)) defines the converted voltage difference, with polarity assignment fixed - no software-configurable channel selection or differential pairing.
Digital control uses a 3-wire MICROWIRE interface (CS, CLK, DI/DO), where CS initiates conversion, CLK synchronizes data transfer, and DI accepts only a start bit (no MUX address bits). DO outputs 8-bit MSB-first result after automatic ½-clock MUX settling delay; LSB-first mode is not supported, distinguishing it from ADC0832/34/38 variants.
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 - includes offset, full-scale, linearity, and multiplexer errors; no calibration required |
| Conversion Time | 32 μs - fixed latency at 250 kHz clock; enables up to ~31.25 kSPS throughput |
| Supply Voltage | 4.5 V to 6.3 V - supports direct connection to standard 5 V logic rails with margin |
| Input Range | 0 V to 5 V with single 5 V supply - ratiometric operation ensures code stability vs. supply drift |
| Power Dissipation | 15 mW typical - low quiescent current (0.9 mA ICC) suits battery-aware embedded systems |
| Operating Temperature | 0°C to +70°C - commercial-grade thermal envelope suitable for non-automotive industrial control |
Pinout & Package
ADC0831CCWMX/NOPB is housed in an 8-pin SOIC (NPA) package with 150 mil width, surface-mount compatible footprint, and standard JEDEC MO-153 outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive Supply | Primary 4.5–6.3 V power rail; powers internal logic, reference divider, and SAR core |
| GND | Ground Reference | Analog and digital common return; must be low-impedance to minimize noise coupling |
| VIN(+) | Differential Input (+) | Non-inverting analog input terminal; voltage difference vs. VIN(−) determines conversion result |
| VIN(−) | Differential Input (−) | Inverting analog input terminal; internally connected to COM (GND) in default configuration |
| CLK | Serial Clock Input | Asynchronous edge-triggered timing source; rising edge clocks DI, falling edge clocks DO |
| CS | Chip Select Input | Active-low initiation signal; must remain low throughout entire conversion cycle |
| DI | Data Input | Accepts start bit only (logic "1"); no MUX address bits - distinguishes ADC0831 from multi-channel variants |
| DO | Data Output | Tri-state serial output; provides leading zero during MUX settle, then 8-bit MSB-first result |
Key Features
| Feature | Design Value |
|---|---|
| Fixed single-differential input | Eliminates MUX control logic and address decoding overhead - simplifies firmware and reduces CPU cycles per conversion |
| MICROWIRE serial interface | Enables direct connection to COPS-family processors and bit-banged GPIO on general-purpose microcontrollers |
| No zero/full-scale adjustment | Reduces BOM count and eliminates factory calibration steps - lowers production test cost and time |
| Ratiometric operation | Output code tracks VCC variations - ideal for systems where analog sensor excitation and A/D reference share same supply |
| Shunt regulator support | Allows operation from high-voltage supplies (up to 8.5 V at V+) via internal zener - enables single-supply designs without external LDO |
Applications
| Temperature Monitoring | Industrial Sensor Interface |
|---|---|
Use Scenario: Reading thermistor or RTD bridge outputs in HVAC controllers and PLC I/O modules. IC Role / Device Role / Timing Role: ADC0831CCWMX/NOPB performs single-ended or differential voltage digitization of conditioned sensor signals with 8-bit resolution. Use Value: ±1 LSB accuracy and ratiometric behavior ensure stable readings across 0°C–70°C ambient without recalibration when powered from same 5 V rail as sensor excitation. | Use Scenario: Digitizing 0–5 V analog outputs from pressure, flow, or level transmitters in factory automation. IC Role / Device Role / Timing Role: ADC0831CCWMX/NOPB acts as local A/D front-end at sensor node, converting analog signals to noise-immune serial data. Use Value: 32 μs conversion time and 3-wire interface enable compact, low-cost remote sensing nodes with minimal PCB real estate and wiring. |
| Microcontroller Peripheral Expansion | Legacy System Upgrade |
Use Scenario: Adding analog input capability to 8-bit MCUs (e.g., PIC16F, 8051) with limited GPIO and no hardware SPI. IC Role / Device Role / Timing Role: ADC0831CCWMX/NOPB serves as serial A/D co-processor, controlled via software-timed GPIO toggling. Use Value: MSB-first-only protocol and start-bit-only addressing reduce firmware complexity versus multi-channel variants requiring full MUX word handling. | Use Scenario: Replacing obsolete 8-bit ADCs (e.g., MAX106, ICL7109) in legacy test equipment and instrumentation. IC Role / Device Role / Timing Role: ADC0831CCWMX/NOPB functions as drop-in functional replacement for single-input serial ADCs with identical SOIC-8 footprint. Use Value: Pin-compatible layout, identical timing constraints, and TI's long-term product availability ensure seamless migration 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 |
|---|---|---|---|
| ADC0832CCN | 2-channel multiplexer; requires 2-bit MUX address; supports single-ended and differential modes | Enables dual-sensor monitoring from one device; adds firmware overhead for channel selection | Select when system requires two independent analog inputs and can accommodate extra address bits and timing |
| ADS7816U | 8-bit, 200 kSPS, SPI-compatible, internal reference; 8-pin SOIC but different pinout and timing | Higher speed and integrated reference simplify design but require PCB layout change and new firmware interface | Select when higher throughput or reference independence outweighs migration effort and cost premium |
Compared with ADC0832CCN, ADC0831CCWMX/NOPB offers simpler interface and lower firmware overhead but lacks channel flexibility; compared with ADS7816U, it provides proven long-lifecycle availability and direct MICROWIRE compatibility at lower cost, though with slower conversion and external reference dependency.
Availability
ADC0831CCWMX/NOPB is available at Aetrix Electronics and suitable for industrial control, sensor signal conditioning, and microcontroller peripheral expansion requiring stable component supply, long-term lifecycle assurance, and commercial-temperature-grade performance.
Supply support for ADC0831CCWMX/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 connectivity solutions for industrial, automotive, and consumer applications.
The ADC0831CCWMX/NOPB belongs to TI's legacy precision data acquisition family, designed specifically for cost-sensitive, low-complexity 8-bit serial ADC applications in commercial-temperature industrial systems.
FAQ
Does ADC0831CCWMX/NOPB support LSB-first data output?
No. ADC0831CCWMX/NOPB outputs conversion results exclusively in MSB-first format. Unlike ADC0832/34/38 variants, it lacks the SE (Shift Enable) pin and internal output shift register for LSB-first operation. The DO line delivers one leading zero followed by eight data bits starting with the most significant bit, synchronized to CLK falling edges.
What is the function of the COM pin on ADC0831CCWMX/NOPB?
The COM pin on ADC0831CCWMX/NOPB is internally connected to GND and serves as the default reference point for the VIN(−) input in single-ended configurations. It cannot be externally driven or reconfigured - this fixed grounding distinguishes ADC0831CCWMX/NOPB from multi-channel variants that expose COM as a user-accessible pseudo-differential reference terminal.
Can ADC0831CCWMX/NOPB operate with a 3.3 V supply?
No. ADC0831CCWMX/NOPB requires a minimum supply voltage of 4.5 VDC and is specified for operation from 4.5 V to 6.3 V. At 3.3 V, internal circuitry-including the resistor ladder, comparator, and digital logic-fails to meet timing and accuracy specifications. For 3.3 V systems, consider modern alternatives like ADS7822 or MCP3002 with appropriate voltage translation.
Is ADC0831CCWMX/NOPB pin-compatible with other ADC083x-N series devices?
No. ADC0831CCWMX/NOPB uses an 8-pin SOIC package, while ADC0832-N (8-pin), ADC0834-N (14-pin), and ADC0838-N (20-pin PDIP/SOIC/PLCC) have different pin counts and incompatible pinouts. Even among 8-pin variants, signal assignments (e.g., COM, DI/DO behavior, absence of SE) differ - PCB layout is not interchangeable between ADC0831CCWMX/NOPB and other family members.
What is the maximum clock frequency supported by ADC0831CCWMX/NOPB?
ADC0831CCWMX/NOPB supports a maximum clock frequency of 400 kHz. At this rate, conversion time reduces to approximately 20 μs (8 clock periods), though the datasheet specifies 32 μs at the standard 250 kHz clock. Exceeding 400 kHz risks timing violations in setup/hold windows and may cause invalid output codes or latch-up.
ADC0831CCWMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 31.25k
- Number of Inputs:
- 1
- 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:
- 14-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC0831CCWMX/NOPB FAQ
1.How can I place an order for ADC0831CCWMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC0831CCWMX/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 ADC0831CCWMX/NOPB reliable?
The price and inventory of ADC0831CCWMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC0831CCWMX/NOPB is usually 5 days.
3.What payment methods are accepted for ADC0831CCWMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC0831CCWMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC0831CCWMX/NOPB?
ADC0831CCWMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC0831CCWMX/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 ADC0831CCWMX/NOPB?
For technical support, including ADC0831CCWMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC0831CCWMX/NOPB requirements.
6.How does Aetrix verify that ADC0831CCWMX/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC0831CCWMX/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 ADC0831CCWMX/NOPB meets industry standards.
7.What is the process for return or replacement of ADC0831CCWMX/NOPB?
All ADC0831CCWMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC0831CCWMX/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 ADC0831CCWMX/NOPB part is unused and in its original packaging.
Return procedure for ADC0831CCWMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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