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Texas Instruments ADC0848CCVX/NOPB
- Part No.:
- ADC0848CCVX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
ADC0848CCVX/NOPB.pdf
- Description:
- ADC0848 8-BIT MICROPROCESSOR COM
- Quantity:
- Payment:
- Shipping:
Inventory:370
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Product details
Overview
ADC0848CCVX/NOPB from Texas Instruments (formerly National Semiconductor) is an 8-bit successive-approximation analog-to-digital converter with integrated 8-channel analog multiplexer, designed for microprocessor interface in data acquisition systems. It operates from a single 5 V supply, delivers ±1 LSB total unadjusted error, features internal clock generation, and supports software-configurable single-ended, differential, and pseudo-differential input modes. It is used in industrial sensor monitoring where multi-channel voltage sampling with minimal external components is required.
For engineers reviewing the ADC0848CCVX/NOPB datasheet, ADC0848CCVX/NOPB pinout, ADC0848CCVX/NOPB application, or ADC0848CCVX/NOPB equivalent, key selection considerations include its 8-channel MUX flexibility, ratiometric operation capability, TRI-STATE output compatibility with 8080/8085-style buses, and molded chip carrier (V28A) package suitability for high-density PCB layouts.
Technical Context
The ADC0848CCVX/NOPB implements a sampled-data comparator architecture enabling true differential conversion between user-selected "+" and "−" inputs. Its internal clock drives a 40 μs max conversion time, and the MUX address latch (MA0–MA4) shares pins with DB0–DB4, requiring RD high to enable address loading.
It supports three distinct analog input configurations: single-ended (CH1–CH8 vs AGND), differential (e.g., CH1+/CH2−), and pseudo-differential (CH1–CH7 vs CH8 as adjustable reference). The reference input accepts 0 V to VCC, enabling full-scale spans as low as ~100 mV while maintaining 8-bit resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - delivers 256 discrete digital codes over full-scale analog input range |
| Total Unadjusted Error | ±1 LSB - includes offset, full-scale, linearity, and MUX errors; no calibration required for basic applications |
| Supply Voltage | 4.5 V to 6.0 V DC - compatible with standard 5 V logic rails and tolerant of typical power rail variation |
| Conversion Time | 40 μs maximum - enables up to 25 kSPS sampling rate when interfaced with fast microprocessors |
| Input Channels | 8-channel analog multiplexer - reduces system component count by integrating channel selection on-chip |
| Reference Flexibility | Ratiometric or absolute - VREF can be tied to VCC for transducer applications or driven by precision source for calibrated measurement |
| Output Interface | TRI-STATE 8-bit parallel bus - directly connects to microprocessor data bus without glue logic |
Pinout & Package
Molded Chip Carrier (MCC) package, 28-pin, V28A outline - hermetically sealed ceramic body with J-lead configuration, optimized for thermal stability and high-reliability industrial mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND | Analog Ground | Separate ground reference for analog circuitry; must be isolated from digital ground to minimize noise coupling |
| CH1–CH8 | Analog Input Channels | Eight differential-capable inputs; configured via MA0–MA4 address bits into single-ended, differential, or pseudo-differential mode |
| VREF | Reference Voltage Input | Defines full-scale span (VIN(MAX) − VIN(MIN)); accepts 0 V to VCC; minimum input resistance 1.1 kΩ |
| CS | Chip Select | Active-low enable for device communication; initiates conversion when WR is pulsed low with CS low |
| WR | Write Strobe | Falling edge loads MUX address and starts conversion; rising edge with RD high latches new configuration |
| RD | Read Strobe | Active-low signal that enables TRI-STATE output drivers to place conversion result on DB0–DB7 |
| INTR | Interrupt Output | Open-drain active-low flag signaling conversion completion; reset by CS+RD or CS+WR sequence |
| DB0–DB7 | Data Bus Outputs | 8-bit parallel TRI-STATE outputs; share pins MA0–MA4 during address loading (RD = high) |
| VCC | Power Supply | +5 V DC supply; powers both analog and digital sections; decoupling capacitor required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable MUX modes | Single-ended, differential, and pseudo-differential input routing controlled entirely via address bits-no external switches or op-amps needed |
| Internal clock generator | Eliminates need for external timing components; ensures consistent 40 μs conversion time across temperature and supply variations |
| Ratiometric operation support | VREF tied to VCC enables direct interfacing with resistive sensors (e.g., RTDs, potentiometers) without precision reference ICs |
| No zero/full-scale adjustment required | Factory-trimmed performance allows immediate use in cost-sensitive designs; ±1 LSB error guaranteed over 0°C to +70°C |
| TRI-STATE parallel interface | Direct connection to 8080/8085/Z80-style microprocessor buses without bus transceivers or address decoding logic |
Applications
| Industrial Sensor Monitoring | Automotive Ratiometric Transducers |
|---|---|
Use Scenario: Simultaneous sampling of multiple temperature, pressure, and position sensors in PLC I/O modules. IC Role / Device Role / Timing Role: 8-channel A/D converter performing sequential conversions under microcontroller control; INTR signals readiness for data readback. Use Value: Reduces BOM count by replacing discrete MUX + ADC combinations; single 5 V supply simplifies power design. | Use Scenario: Reading throttle position, coolant temperature, and manifold pressure sensors in engine control units. IC Role / Device Role / Timing Role: Ratiometric ADC converting sensor outputs referenced to same VCC rail used for VREF, rejecting supply ripple. Use Value: Maintains accuracy despite automotive battery voltage fluctuations (11–14 V); eliminates need for separate precision reference. |
| Legacy Microprocessor Data Acquisition | Low-Cost Test Equipment Front-End |
Use Scenario: Adding analog input capability to 8085-based lab instruments or educational kits. IC Role / Device Role / Timing Role: Memory-mapped or I/O-mapped peripheral with CS/WR/RD handshaking; TRI-STATE outputs prevent bus contention. Use Value: Enables plug-and-play integration with minimal firmware changes; no external interface logic required. | Use Scenario: Multi-point voltage logging in handheld multimeters or portable oscilloscope probes. IC Role / Device Role / Timing Role: Standalone ADC capturing up to 8 signals per cycle; pseudo-differential mode rejects common-mode noise from probe leads. Use Value: Achieves >50 dB CMRR at 60 Hz using internal differential sampling; avoids external instrumentation amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit multiplexed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC0848BCVX/NOPB | ±½ LSB total unadjusted error (vs. ±1 LSB); otherwise identical pinout, timing, and functionality | Suitable for higher-accuracy requirements where tighter linearity and offset specs are critical | Select ADC0848BCVX/NOPB when measurement repeatability below ±0.4% FS is required; same layout and firmware apply |
| ADS7822U | 12-bit resolution, SPI interface, 2.7–5.25 V supply; no integrated MUX; serial output only | Used in modern low-pin-count designs where board space is constrained and microcontroller has SPI peripheral | Choose ADS7822U for upgraded resolution and reduced footprint, but requires firmware rewrite and external MUX if >1 channel needed |
Compared with ADC0848CCVX/NOPB, ADC0848BCVX/NOPB offers improved DC accuracy without changing system architecture, while ADS7822U trades parallel simplicity for higher resolution and serial efficiency-requiring interface redesign but enabling smaller PCB area and lower power.
Availability
ADC0848CCVX/NOPB is available at Aetrix Electronics and suitable for industrial sensor monitoring, automotive ratiometric transducer interfaces, and legacy microprocessor data acquisition systems requiring stable component supply and long-term obsolescence management.
Supply support for ADC0848CCVX/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 acquired National Semiconductor in 2011 and maintains legacy product support, datasheets, and cross-reference tools for discontinued yet widely deployed components.
The ADC0848CCVX/NOPB belongs to TI's legacy data converter portfolio targeting cost-sensitive, microprocessor-based data acquisition-designed for ease of integration into 8-bit and 16-bit embedded systems without external timing or interface logic.
FAQ
What is the operating temperature range for ADC0848CCVX/NOPB?
The ADC0848CCVX/NOPB is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade rating aligns with its intended use in non-extreme industrial and laboratory environments. The device's electrical characteristics-including ±1 LSB total unadjusted error and 40 μs max conversion time-are guaranteed across this full range. Derating is not required within these limits, and no additional thermal management is needed for typical PCB layouts.
Does ADC0848CCVX/NOPB require external clock circuitry?
No, ADC0848CCVX/NOPB does not require external clock circuitry. It contains a fully integrated RC oscillator that generates the internal timing necessary for successive-approximation conversion. This internal clock ensures a maximum conversion time of 40 μs across the full operating temperature and supply range. External clocking is neither supported nor necessary-simplifying design and reducing bill-of-materials cost.
How is the analog input configuration selected on ADC0848CCVX/NOPB?
The analog input configuration (single-ended, differential, or pseudo-differential) on ADC0848CCVX/NOPB is selected by loading specific 5-bit address patterns into the internal MUX address latch via MA0–MA4 pins (shared with DB0–DB4). These patterns are defined in Table 2 of the datasheet and depend on the states of CS, WR, and RD. For example, asserting CS low, pulsing WR low with RD high, and presenting "00001" on MA0–MA4 selects CH1+/CH2− differential mode.
Can ADC0848CCVX/NOPB operate with a reference voltage lower than 5 V?
Yes, ADC0848CCVX/NOPB can operate with a reference voltage as low as 100 mV, enabling high-resolution digitization of small-signal transducers. The LSB size scales linearly with VREF (e.g., 1 LSB = VREF/256), so a 2.56 V reference yields 10 mV/LSB. However, noise sensitivity increases proportionally-careful PCB layout, low-noise references, and source impedance <1 kΩ are essential to maintain accuracy at reduced spans.
What package type is used for ADC0848CCVX/NOPB?
ADC0848CCVX/NOPB uses the Molded Chip Carrier (MCC) package with 28 leads, designated V28A by National Semiconductor. It features a ceramic body with J-bend leads, measuring 0.590″ × 0.590″ (15.0 mm × 15.0 mm), and is supplied in tape-and-reel format. This package provides superior thermal performance and moisture resistance compared to plastic DIP variants, making it suitable for industrial applications requiring long-term reliability.
ADC0848CCVX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 25k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 4.5V ~ 6V
- Voltage - Supply, Digital:
- 4.5V ~ 6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC0848CCVX/NOPB FAQ
1.How can I place an order for ADC0848CCVX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC0848CCVX/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 ADC0848CCVX/NOPB reliable?
The price and inventory of ADC0848CCVX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC0848CCVX/NOPB is usually 5 days.
3.What payment methods are accepted for ADC0848CCVX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC0848CCVX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC0848CCVX/NOPB?
ADC0848CCVX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC0848CCVX/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 ADC0848CCVX/NOPB?
For technical support, including ADC0848CCVX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC0848CCVX/NOPB requirements.
6.How does Aetrix verify that ADC0848CCVX/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC0848CCVX/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 ADC0848CCVX/NOPB meets industry standards.
7.What is the process for return or replacement of ADC0848CCVX/NOPB?
All ADC0848CCVX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC0848CCVX/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 ADC0848CCVX/NOPB part is unused and in its original packaging.
Return procedure for ADC0848CCVX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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