Part A
ADC0848CCVX
Texas Instruments
- Lifecycle
- Active
- Stock
- 2942 PCS
- Package
- LCC-28
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADC0848CCVX and ADC0838BCV are both 8-bit successive-approximation ADCs with 8 input channels and a serial interface, making them functionally comparable for many multiplexed analog acquisition designs. However, the ADC0848CCVX is specified for a broader supply range and includes a self-calibration feature, while the ADC0838BCV offers a differential input configuration option. Designers should validate the supply voltage, input configuration, and package footprint against the target application before substituting one for the other.
Resolution
High match
Channel Count
High match
Input Configuration
Validation required
Package Type
Validation required
Parts at a glance
Part B
ADC0838BCV
Texas Instruments
- Lifecycle
- Active
- Stock
- 4567 PCS
- Package
- LCC-20
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | ADC0838BCV | Why it matters |
|---|---|---|---|
| Resolution | 8 bit | 8 bit | Both are 8-bit converters, so quantization step size is equivalent for a given reference. |
| Number of Input Channels | 8 single-ended / 4 differential | 8 single-ended / 4 differential | Channel count determines how many analog signals can be multiplexed into one converter. |
| Interface Type | Parallel (microprocessor bus) | Serial (Microwire/SPI-compatible) | The bus interface must match the host controller; parallel and serial parts are not pin/interface compatible. |
| Conversion Architecture | Successive approximation | Successive approximation | Same SAR architecture gives similar conversion behavior and timing characteristics. |
| Supply Voltage | 5 V | 5 V | Both operate from a single 5 V supply, simplifying power rail design. |
| Package | 28-pin PLCC | 20-pin SOIC | Different footprints and pin counts mean the parts are not drop-in board replacements. |
| Operating Temperature Range | 0°C to +70°C (commercial) | 0°C to +70°C (commercial) | Both are commercial-grade, suitable for the same ambient operating environments. |
| Reference Input | External reference | External reference | Both require an external reference, so accuracy depends on the same external reference design. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADC0848CCVX | ADC0838BCV |
|---|---|---|
| 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 ADC0838BCV?
The ADC0848CCVX is an 8-channel, 8-bit successive-approximation A/D converter with a 4.5 µs conversion time, while the ADC0838BCV is an 8-channel, 8-bit serial I/O A/D converter with a 32 µs conversion time. The ADC0848CCVX interfaces via a microprocessor-compatible parallel bus, whereas the ADC0838BCV uses a serial interface (MICROWIRE/SPI-compatible). Both are offered in a 28-pin PLCC package (ADC0848CCVX) and a 20-pin SOIC package (ADC0838BCV), respectively.
Are the ADC0848CCVX and ADC0838BCV pin-compatible?
No. The ADC0848CCVX is supplied in a 28-pin PLCC package, while the ADC0838BCV is supplied in a 20-pin SOIC package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for each other.
What is the resolution and conversion time of each device?
Both devices provide 8-bit resolution. The ADC0848CCVX has a conversion time of 4.5 µs (typical), while the ADC0838BCV has a conversion time of 32 µs (typical). The faster conversion of the ADC0848CCVX makes it better suited to higher-throughput parallel-bus systems.
What interface types do these ADCs use?
The ADC0848CCVX uses a parallel microprocessor-compatible interface with data bus and control lines. The ADC0838BCV uses a serial interface compatible with MICROWIRE and SPI, requiring fewer I/O pins on the host controller.
What are the input channel configurations of the ADC0848CCVX and ADC0838BCV?
Both devices provide 8 analog input channels. The ADC0848CCVX supports single-ended, differential, and pseudo-differential input configurations. The ADC0838BCV also supports single-ended, differential, and pseudo-differential modes, selectable via software configuration.
What supply voltage and reference requirements apply to these devices?
Both the ADC0848CCVX and ADC0838BCV operate from a single 5 V supply. Each device supports an external reference voltage input (VREF) that sets the full-scale analog input range, allowing the user to tailor the conversion range to the application.
Which device is more suitable for a design with limited microcontroller I/O pins?
The ADC0838BCV is more suitable because its serial MICROWIRE/SPI-compatible interface requires only a few I/O lines, whereas the ADC0848CCVX requires a parallel data bus and multiple control lines, consuming more host I/O resources.
Can the ADC0848CCVX and ADC0838BCV be used interchangeably in an existing design?
No. They differ in package type and pin count (28-pin PLCC vs 20-pin SOIC), interface architecture (parallel vs serial), and conversion time (4.5 µs vs 32 µs). A direct substitution is not possible without redesigning the interface, PCB footprint, and timing considerations.