Part A
ADC0848CCVX
Texas Instruments
- Lifecycle
- Active
- Stock
- 2942 PCS
- Package
- LCC-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADC0848CCVX and ADC0838CCVX share the same 8-bit successive-approximation ADC architecture, 8-channel multiplexer, and 24-pin package footprint, making them strong functional replacement candidates. The primary distinction lies in the digital interface configuration, so designers should confirm the host interface mode before substituting one for the other.
Resolution and Architecture
High match
Channel Count and Multiplexer
High match
Digital Interface Type
Validation required
Package and Pin Configuration
High match
Parts at a glance
Part B
ADC0838CCVX
Texas Instruments
- Lifecycle
- Active
- Stock
- 4505 PCS
- Package
- LCC-20
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADC0848CCVX | ADC0838CCVX | Why it matters |
|---|---|---|---|
| Resolution | 8 bits | 8 bits | Both are 8-bit ADCs, so quantization step size is equivalent; resolution alone does not differentiate them. |
| Number of Analog Input Channels | 8 channels (single-ended) / 4 channels (differential) | 8 channels (single-ended) / 4 channels (differential) | Channel count determines how many signals can be multiplexed into the converter without external muxing. |
| Input Configuration / Multiplexer Type | Single-ended or differential, software configurable | Single-ended or differential, software configurable | Flexible input configuration allows the same part to serve both ground-referenced and differential sensor interfaces. |
| Interface Type | Parallel (microprocessor bus interface) | Serial (Microwire/SPI-compatible) | The bus interface dictates PCB routing, host pin count, and firmware; parallel vs serial makes these parts non-drop-in substitutes. |
| Supply Voltage Range | 4.5 V to 6.0 V (5 V nominal) | 4.5 V to 6.0 V (5 V nominal) | Compatible supply requirements allow either part to operate from the same 5 V rail in a given design. |
| Conversion Time | Approximately 30 µs (at 5 V) | Approximately 32 µs (at 5 V) | Conversion time sets the maximum sampling rate and affects throughput in time-sensitive acquisition systems. |
| Package / Mounting | 28-pin PLCC (surface mount) | 20-pin PLCC (surface mount) | Different package footprints and pin counts prevent direct board-level interchange without layout changes. |
| Operating Temperature Range | 0 °C to +70 °C (commercial) | 0 °C to +70 °C (commercial) | Identical temperature ratings mean both suit the same commercial-grade environments. |
| Reference Input | External reference (VREF/2 configuration) | External reference (VREF/2 configuration) | External reference support allows scaling of the input range to match sensor output levels. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADC0848CCVX | ADC0838CCVX |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Obsolete | Obsolete |
| Number of Bits | 8 | 8 |
| Number of Inputs | 4, 8 | 4, 8 |
| Input Type | Differential, Pseudo-Differential, Single Ended | Differential, Pseudo-Differential, Single Ended |
| Data Interface | Parallel | SPI |
| Configuration | MUX-ADC | MUX-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 4.5V ~ 6V | 4.5V ~ 6.3V |
| Voltage - Supply, Digital | 4.5V ~ 6V | 4.5V ~ 6.3V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Sampling Rate(Per Second) | 25k | - |
Frequently asked questions
What are the key differences between the ADC0848CCVX and ADC0838CCVX?
The ADC0848CCVX is an 8-channel, 8-bit successive-approximation A/D converter with a multiplexer that provides single-ended, differential, or pseudo-differential input configurations. The ADC0838CCVX is also an 8-bit successive-approximation A/D converter with an 8-channel multiplexer, but it offers additional input configuration flexibility including differential and pseudo-differential modes with a different channel addressing scheme. Both are pin-compatible in the 28-pin PLCC package (VX suffix), but the ADC0848 provides a simpler single-ended-oriented multiplexer control interface, while the ADC0838 supports a broader range of differential input combinations.
Are the ADC0848CCVX and ADC0838CCVX pin-compatible?
Yes. Both devices are offered in the same 28-pin PLCC package (indicated by the CCVX suffix) and share the same pinout for power, ground, clock, chip select, data I/O, and reference pins. However, the multiplexer channel selection and input configuration pins may function differently between the two devices, so designers should verify the digital control interface against the respective datasheets before substituting one for the other.
What is the resolution and conversion architecture of these devices?
Both the ADC0848CCVX and ADC0838CCVX are 8-bit successive-approximation register (SAR) analog-to-digital converters. They provide 8-bit resolution with a typical conversion time on the order of tens of microseconds, suitable for general-purpose data acquisition and embedded control applications.
How many analog input channels do these ADCs support?
Both devices provide an 8-channel analog multiplexer front end. The ADC0848CCVX supports single-ended, differential, and pseudo-differential input configurations across its 8 channels. The ADC0838CCVX also supports 8 channels with single-ended, differential, and pseudo-differential modes, but its multiplexer addressing allows different combinations of differential pairs. The exact number of usable differential pairs depends on the selected input mode as defined in each datasheet.
What is the difference in input configuration flexibility between the two parts?
The ADC0838CCVX offers more flexible differential input programming, allowing the user to select various differential and pseudo-differential channel pairs through the multiplexer address bits. The ADC0848CCVX provides single-ended, differential, and pseudo-differential modes but with a different channel assignment scheme. Designers requiring specific differential pair combinations should consult the respective datasheets to confirm the available configurations.
Can the ADC0848CCVX and ADC0838CCVX operate from the same supply voltage?
Both devices are designed for single-supply operation in the 5 V range, consistent with the standard 8-bit ADC family from the manufacturer. The exact supply voltage range and absolute maximum ratings should be verified from the official datasheets, as the two parts may have slightly different specified operating conditions.
What interface do these ADCs use to communicate with a microcontroller?
Both the ADC0848CCVX and ADC0838CCVX use a serial interface compatible with the manufacturer's standard ADC serial protocol, involving chip select, clock, and data I/O lines. This allows connection to microcontrollers and shift-register-based interfaces. The exact timing and protocol details, including the number of clock cycles per conversion, should be confirmed from the respective datasheets.
Which part should be selected for a design requiring multiple differential input pairs?
The ADC0838CCVX is generally the more suitable choice when flexible differential input pair selection is required, because its multiplexer programming supports a wider variety of differential and pseudo-differential configurations. The ADC0848CCVX is better suited to designs that primarily require single-ended inputs with occasional differential or pseudo-differential measurements. Final selection should be based on the specific channel configuration requirements verified against both datasheets.