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Texas Instruments ADC0834CCWMX/NOPB
- Part No.:
- ADC0834CCWMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADC0834CCWMX/NOPB.pdf
- Description:
- IC ADC 8BIT SAR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,610
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Product details
Overview
ADC0834CCWMX/NOPB from Texas Instruments is an 8-bit successive approximation analog-to-digital converter with a 4-channel analog multiplexer, serial MICROWIRE-compatible interface, ±1 LSB total unadjusted error, 32 μs conversion time, and single 5 VDC supply operation. It serves as a sensor signal digitizer in embedded data acquisition systems requiring compact, low-power, ratiometric or referenced ADC functionality.
For engineers reviewing the ADC0834CCWMX/NOPB datasheet, ADC0834CCWMX/NOPB pinout, ADC0834CCWMX/NOPB application, or ADC0834CCWMX/NOPB equivalent, key selection considerations include its 4-channel software-configurable single-ended/differential input architecture, TRI-STATE serial output, shunt-regulator-enabled high-voltage supply compatibility, and SOIC-14 package suitability for space-constrained industrial control and instrumentation designs.
Technical Context
The ADC0834CCWMX/NOPB implements a sample-data comparator structure with a resistor ladder-based successive approximation register (SAR), enabling precise differential voltage measurement between programmable channel pairs. Its MUX addressing sequence-shifted in via DI before conversion-determines input configuration (single-ended or differential) and polarity per conversion cycle.
It supports both ratiometric operation (VREF tied to VCC) and absolute-accuracy mode (external reference), with internal zener regulation allowing V+ supply up to 8.5 V while maintaining functional VCC compliance. The DO line enters TRI-STATE after conversion completion, and the SAR status line signals active conversion timing.
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 worst-case code transition accuracy without calibration |
| Conversion Time | 32 μs - enables up to ~31.25 kSPS sustained sampling rate at 250 kHz clock |
| Supply Voltage | 4.5 V to 6.3 V - supports standard 5 V logic rails and tolerates industrial supply variation |
| Input Range | 0 V to 5 V with single 5 V supply - accommodates common sensor output spans without level-shifting |
| Power Dissipation | 15 mW typical - enables thermally constrained PCB layouts and battery-powered operation |
| Reference Mode | Ratiometric or fixed - allows system-level accuracy tracking or precision transducer digitization |
Pinout & Package
ADC0834CCWMX/NOPB is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, 8.65 mm × 3.9 mm body, and surface-mount footprint compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply rail | Provides power for analog core and digital interface; also serves as internal VREF source in ratiometric mode |
| GND | Analog/digital ground | Common return for all analog inputs, reference, and digital I/O; must be low-impedance for noise immunity |
| VREF | Reference voltage input | Defines full-scale span; accepts external stable reference or connects to VCC for ratiometric operation |
| CLK | Serial clock input | Synchronizes MUX address loading and bit-shifted conversion result output; supports 10–400 kHz |
| CS | Chip select input | Active-low enable; initiates conversion sequence and holds internal state until deasserted |
| DI | Data input | Serially loads 3-bit MUX address (SGL/DIF, SELECT, ODD/SIGN) during CS low before conversion |
| DO | Data output | TRI-STATE serial output delivering MSB-first 8-bit result; driven only during CS low and conversion active |
| IN0–IN3 | Analog input channels | Four single-ended or two differential (IN0/IN1, IN2/IN3) configurable inputs; support 0 V to VCC +0.05 V range |
| COM | Common-mode reference | Internally connected to GND; used as pseudo-differential "−" reference when enabled in software |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable 4-channel multiplexer | Enables per-conversion reconfiguration between single-ended and differential modes on IN0–IN3, reducing external switching components |
| MICROWIRE-compatible serial interface | Direct connection to COPS-family microcontrollers without protocol translation; supports bidirectional DI/DO wire sharing |
| Internal shunt regulator on V+ | Permits operation from unregulated supplies up to 8.5 V by regulating VCC, eliminating need for external LDO in high-voltage sensor front-ends |
| No zero or full-scale adjustment required | Guarantees ±1 LSB error across temperature and supply; removes factory calibration step and reduces BOM cost |
| Differential input common-mode rejection | Minimizes 50/60 Hz noise pickup in industrial environments by sampling "+" and "−" inputs within 2 μs (½ CLK at 250 kHz) |
Applications
| Industrial Sensor Interface | Embedded Data Logger |
|---|---|
Use Scenario: Digitizing outputs from RTDs, thermocouples, and bridge-based pressure sensors in PLC I/O modules. IC Role / Device Role / Timing Role: ADC0834CCWMX/NOPB acts as the primary analog front-end digitizer, performing channel-multiplexed, differential conversions synchronized to host MCU clock. Use Value: Its ±1 LSB error and 0 V–5 V input range match industrial sensor signal conditioning stages; differential mode rejects common-mode noise from long sensor cables. | Use Scenario: Capturing environmental parameters (temperature, humidity, light) in battery-powered field-deployed loggers. IC Role / Device Role / Timing Role: ADC0834CCWMX/NOPB provides low-power, serial-output digitization with software-selectable channels, minimizing wake-up time and MCU I/O usage. Use Value: 15 mW power draw and no external reference or trim components reduce system energy budget and component count for extended deployment. |
| Motor Control Feedback | Power Supply Monitoring |
Use Scenario: Sampling current-sense amplifier outputs and DC bus voltage in BLDC motor drives. IC Role / Device Role / Timing Role: ADC0834CCWMX/NOPB functions as auxiliary ADC for real-time current/voltage feedback, interfacing directly to motor control MCU via MICROWIRE. Use Value: 32 μs conversion time enables sub-100 μs loop sampling; ratiometric operation ensures accuracy despite supply ripple affecting VCC and sensor gain stages. | Use Scenario: Monitoring multiple rail voltages (3.3 V, 5 V, 12 V) and thermal sensors in telecom power shelves. IC Role / Device Role / Timing Role: ADC0834CCWMX/NOPB serves as multi-rail monitor ADC, using its 4-channel mux to sequentially scan critical supply nodes under MCU command. Use Value: Internal shunt regulator allows direct connection to 12 V rail for V+, simplifying supply monitoring architecture and eliminating dedicated bias supply. |
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 |
|---|---|---|---|
| ADC0834CCN/NOPB | Same electrical specs but in 14-pin PDIP package; wider 0.3″ body; higher thermal resistance | Preferred for prototyping, through-hole assembly, or legacy board upgrades where SOIC footprint unavailable | Select ADC0834CCN/NOPB only when manual soldering or socket-based testing is required; not suitable for high-density SMT production. |
| ADS7822U | 8-bit, 200 kSPS, SPI interface, 2.7–5.25 V supply; no internal MUX; requires external reference | Better speed and lower voltage operation, but lacks integrated multiplexer and ratiometric flexibility | Choose ADS7822U when higher throughput or dual-supply operation is critical and external MUX is acceptable; ADC0834CCWMX/NOPB remains superior for multi-sensor, single-supply, low-component-count designs. |
Compared with ADC0834CCN/NOPB, the ADC0834CCWMX/NOPB offers identical performance in a smaller, reflow-compatible SOIC package ideal for volume manufacturing; versus ADS7822U, it trades raw speed for integrated multiplexing, supply flexibility, and reduced system-level component count.
Availability
ADC0834CCWMX/NOPB is available at Aetrix Electronics and suitable for industrial sensor interfaces, embedded data loggers, motor control feedback loops, and power supply monitoring systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ADC0834CCWMX/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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade IC design.
The ADC083x family-including ADC0834CCWMX/NOPB-is engineered for cost-sensitive, space-constrained industrial and instrumentation applications where serial interface simplicity, multiplexer integration, and robust single-supply operation are essential.
FAQ
What is the maximum clock frequency supported by ADC0834CCWMX/NOPB?
The ADC0834CCWMX/NOPB supports a maximum clock frequency of 400 kHz, as specified in its AC characteristics table. At this rate, conversion time reduces to approximately 20 μs. Operation above 400 kHz may cause timing violations, incomplete MUX settling, or incorrect output codes. For reliable 32 μs conversion at nominal conditions, a 250 kHz clock is recommended per the datasheet test conditions.
Does ADC0834CCWMX/NOPB require external zero or full-scale calibration?
No, ADC0834CCWMX/NOPB does not require external zero or full-scale calibration. Its design guarantees ±1 LSB total unadjusted error across the full operating temperature range (0°C to +70°C) and supply voltage (4.5 V to 6.3 V). This eliminates factory trimming steps and ensures consistent performance without user intervention, directly supporting plug-and-play integration in production systems.
Can ADC0834CCWMX/NOPB operate with a 12 V supply?
Yes, ADC0834CCWMX/NOPB can operate with a 12 V supply applied to the V+ pin, thanks to its internal shunt regulator (6.3–8.5 V breakdown). When V+ exceeds ~6.3 V, the zener regulates VCC to a safe level, enabling direct connection to higher-voltage rails. A current-limiting resistor must be used to restrict V+ current to ≤15 mA, as specified in Absolute Maximum Ratings, to prevent damage.
How many analog input channels does ADC0834CCWMX/NOPB support?
ADC0834CCWMX/NOPB supports four analog input channels (IN0–IN3), configurable in either single-ended mode (four independent inputs) or differential mode (two differential pairs: IN0/IN1 and IN2/IN3). Channel selection and input mode are determined by a 3-bit software-loaded MUX address (SGL/DIF, SELECT, ODD/SIGN), allowing dynamic reconfiguration per conversion cycle.
Is ADC0834CCWMX/NOPB compatible with SPI buses?
ADC0834CCWMX/NOPB is not SPI-compatible; it implements TI's MICROWIRE serial protocol. While both use clock, chip select, and data lines, MICROWIRE requires a start bit followed by a 3-bit MUX address before data output begins, and uses distinct timing relationships (e.g., DO valid on clock falling edge). Direct SPI connection without protocol translation will result in incorrect address loading and corrupted conversion results.
ADC0834CCWMX/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:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 31.25k
- Number of Inputs:
- 2, 4
- 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:
- -
ADC0834CCWMX/NOPB FAQ
1.How can I place an order for ADC0834CCWMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC0834CCWMX/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 ADC0834CCWMX/NOPB reliable?
The price and inventory of ADC0834CCWMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC0834CCWMX/NOPB is usually 5 days.
3.What payment methods are accepted for ADC0834CCWMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC0834CCWMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC0834CCWMX/NOPB?
ADC0834CCWMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC0834CCWMX/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 ADC0834CCWMX/NOPB?
For technical support, including ADC0834CCWMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC0834CCWMX/NOPB requirements.
6.How does Aetrix verify that ADC0834CCWMX/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC0834CCWMX/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 ADC0834CCWMX/NOPB meets industry standards.
7.What is the process for return or replacement of ADC0834CCWMX/NOPB?
All ADC0834CCWMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC0834CCWMX/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 ADC0834CCWMX/NOPB part is unused and in its original packaging.
Return procedure for ADC0834CCWMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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