Part A
ADC0832CCN
Texas Instruments
- Lifecycle
- Active
- Stock
- 5986 PCS
- Package
- PDIP-8
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The ADC0832CCN and ADC0803LCN are not functionally interchangeable despite both being 8-bit successive-approximation ADCs in DIP packages. They differ in serial versus parallel interface architecture, channel configuration, conversion timing, and reference input structure, so the ADC0803LCN cannot directly replace the ADC0832CCN without redesign of the host interface, control firmware, and associated analog front-end circuitry.
Different interface type
Different channel configuration
Different conversion timing
Different reference architecture
Parts at a glance
Part B
ADC0803LCN
Intesil
- Lifecycle
- Active
- Stock
- 5600 PCS
- Package
- DIP-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 | ADC0832CCN | ADC0803LCN | Why it matters |
|---|---|---|---|
| Resolution | 8 bits | 8 bits | Both are 8-bit converters, so quantization step size is equivalent for a given reference voltage. |
| Architecture | Successive approximation (SAR) | Successive approximation (SAR) | Same conversion architecture means similar conversion timing behavior and comparable accuracy characteristics. |
| Number of input channels | 2 single-ended / 1 differential | 1 single-ended | Channel count determines how many analog signals can be multiplexed into one converter; the ADC0832 offers more flexibility. |
| Interface type | Serial (Microwire/SPI-compatible) | Parallel (8-bit) | Serial vs parallel interface affects pin count, board routing, and the host microcontroller's I/O requirements. |
| Supply voltage | 5 V | 5 V | Both operate from a 5 V supply, so power rail compatibility is maintained in a direct substitution. |
| Package | 8-pin DIP | 20-pin DIP | Different package pin counts mean the parts are not footprint-compatible and require different PCB layouts. |
| Conversion time | ~32 µs | ~100 µs | Conversion time affects maximum sampling rate and suitability for faster-changing analog signals. |
| Reference input | External (VREF/2 pin) | External (VREF/2 pin) | Both allow scaling of the input range via an external reference, enabling flexible full-scale voltage selection. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADC0832CCN | ADC0803LCN |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Obsolete | Active |
| Number of Bits | 8 | 8 |
| Sampling Rate(Per Second) | 31.25k | 10k |
| Number of Inputs | 2 | 1 |
| Input Type | Differential, Pseudo-Differential, Single Ended | Differential |
| Data Interface | SPI | Parallel |
| Configuration | MUX-ADC | ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External | External, Supply |
| Voltage - Supply, Analog | 4.5V ~ 6.3V | 4.5V ~ 6.3V |
| Voltage - Supply, Digital | 4.5V ~ 6.3V | 4.5V ~ 6.3V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key architectural differences between the ADC0832CCN and the ADC0803LCN?
The ADC0832CCN is an 8-bit successive-approximation ADC with a 2-channel multiplexer and a serial (Microwire/SPI-compatible) interface, housed in an 8-pin DIP. The ADC0803LCN is an 8-bit successive-approximation ADC with a single analog input and a parallel 8-bit data bus interface, housed in a 20-pin DIP. The ADC0832CCN integrates the multiplexer and serial interface, while the ADC0803LCN provides parallel output and requires an external clock.
Can the ADC0832CCN be used as a direct replacement for the ADC0803LCN?
No. The two devices differ in package pin count (8-pin vs 20-pin DIP), interface type (serial vs parallel), number of analog input channels (2 vs 1), and clocking requirements. They are not pin-compatible or functionally interchangeable without redesigning the interface and PCB layout.
What are the supply voltage and reference requirements for each device?
The ADC0832CCN operates from a single 5 V supply and uses the supply voltage as its reference (ratiometric operation). The ADC0803LCN operates from a 5 V supply and requires an external reference voltage applied to its VREF/2 pin to set the analog input range.
How do the conversion interfaces of the ADC0832CCN and ADC0803LCN differ?
The ADC0832CCN uses a serial interface compatible with Microwire/SPI, requiring chip select, clock, and data lines. The ADC0803LCN provides a parallel 8-bit tri-state output bus with control signals (CS, RD, WR, INTR), allowing direct connection to a microprocessor data bus.
What are the analog input configurations of the ADC0832CCN and ADC0803LCN?
The ADC0832CCN provides a 2-channel multiplexer that can be configured for single-ended inputs on either channel or a differential input between the two channels. The ADC0803LCN has a single analog input channel with a differential input pair (VIN+ and VIN-) for ratiometric or absolute measurements.
Do both devices require an external clock?
No. The ADC0832CCN generates its clock internally from the serial clock supplied by the host, so no separate clock source is required. The ADC0803LCN requires an external clock signal applied to its CLK pin to drive the successive-approximation conversion.
What are the package and pin-count differences between the ADC0832CCN and ADC0803LCN?
The ADC0832CCN is supplied in an 8-pin plastic DIP (N package). The ADC0803LCN is supplied in a 20-pin plastic DIP (N package). The difference in pin count and pinout prevents direct PCB substitution between the two parts.