Part A
ADC0832CCN
Техасские инструменты
- Lifecycle
- Active
- Stock
- 5986 ПКС
- Package
- PDIP-8
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Not a drop-in replacement
The ADC0832CCN and ADC0808CCN/NOPB are both 8-bit successive-approximation ADCs, but they differ fundamentally in serial versus parallel interface, channel count, package pinout, and reference architecture, so the ADC0832CCN cannot be used as a drop-in substitute for the ADC0808CCN/NOPB without redesign of the host interface, board layout, and analog front end.
Different interface type
Different channel count
Different package pinout
Different reference architecture
Parts at a glance
Part B
ADC0808CCN/NOPB
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3641 ПКС
- Package
- DIP-28
- Series
- Сбор данных - аналогово-цифровые преобразователи (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 | ADC0808CCN/NOPB | Why it matters |
|---|---|---|---|
| Resolution | 8 bits | 8 bits | Both are 8-bit converters, so quantization step size is comparable for a given reference voltage. |
| Number of Input Channels | 2 (single-ended) / 1 (differential) | 8 (single-ended) | Channel count determines how many analog signals can be multiplexed into one converter; the ADC0808 supports far more inputs. |
| Architecture | Successive approximation (SAR) | Successive approximation (SAR) | Both use SAR conversion, giving similar speed/accuracy tradeoffs, but the internal multiplexer and control interfaces differ. |
| Interface Type | Serial (Microwire/SPI-compatible) | Parallel (8-bit data bus) | Serial vs parallel interface affects pin count, board routing, and microcontroller/CPU connection requirements. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Both operate from a 5 V supply, simplifying power rail compatibility in legacy 5 V systems. |
| Conversion Time | ~32 µs (at 250 kHz clock) | ~100 µs (at 640 kHz clock) | Conversion time affects maximum sampling rate and suitability for faster-changing analog signals. |
| Package | 8-pin PDIP | 28-pin PDIP | Different package pin counts and footprints mean the parts are not drop-in replacements on the same PCB. |
| Reference Input | External VREF (with VCC/2 option) | External VREF(+) and VREF(-) | Reference configuration determines input voltage range and scaling; the ADC0808 allows a fully differential reference span. |
| Operating Temperature Range | 0 °C to +70 °C | 0 °C to +70 °C | Both are commercial-grade parts, so they suit similar benign environments but not extended industrial temperature ranges. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADC0832CCN | ADC0808CCN/NOPB |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Obsolete | Obsolete |
| Number of Bits | 8 | 8 |
| Sampling Rate(Per Second) | 31.25k | 10k |
| Number of Inputs | 2 | 8 |
| Input Type | Differential, Pseudo-Differential, Single Ended | Single Ended |
| Data Interface | SPI | Parallel |
| Configuration | MUX-ADC | MUX-S/H-ADC |
| Ratio - S / H: ADC | - | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 4.5V ~ 6.3V | 4.5V ~ 6.5V |
| Voltage - Supply, Digital | 4.5V ~ 6.3V | 4.5V ~ 6.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key architectural differences between the ADC0832CCN and the ADC0808CCN/NOPB?
The ADC0832CCN is an 8-bit successive-approximation ADC with a 2-channel multiplexer and a serial (SPI-compatible) output interface, housed in an 8-pin DIP. The ADC0808CCN/NOPB is an 8-bit successive-approximation ADC with an 8-channel multiplexer and a parallel output interface, housed in a 28-pin DIP. The ADC0832 offers fewer channels and a serial interface, while the ADC0808 provides more channels and a parallel interface.
Are the ADC0832CCN and ADC0808CCN/NOPB pin-compatible or package-compatible?
No. The ADC0832CCN is supplied in an 8-pin DIP (MDIP/N package), whereas the ADC0808CCN/NOPB is supplied in a 28-pin DIP (N package). The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for each other.
How do the input channel counts of these two ADCs compare?
The ADC0832CCN provides a 2-channel analog input multiplexer, configurable as single-ended or differential inputs. The ADC0808CCN/NOPB provides an 8-channel single-ended analog input multiplexer. The ADC0808 therefore supports more analog input channels than the ADC0832.
What output interface does each device use to communicate with a host processor?
The ADC0832CCN uses a serial interface compatible with SPI/QSPI/MICROWIRE, requiring chip select, clock, and data lines. The ADC0808CCN/NOPB uses a parallel interface with an 8-bit tri-state output latch, requiring an address bus, start and clock signals, and output enable control. The interface choice affects the number of host pins and the firmware/software driver required.
Do the ADC0832CCN and ADC0808CCN/NOPB operate from the same supply voltage?
Both devices are specified for a 5 V nominal supply. The ADC0832CCN operates from a single 5 V supply, while the ADC0808CCN/NOPB is specified for a 5 V supply (VCC = 5 V) with a separate analog reference input. Designers should confirm the exact supply and reference ranges against the respective manufacturer datasheets for the target operating conditions.
Can the ADC0832CCN be used as a direct substitute for the ADC0808CCN/NOPB in an existing design?
No. Because the two devices differ in package/pin count, channel count, and output interface (serial versus parallel), a direct substitution is not possible without redesigning the PCB layout and adapting the host interface and control firmware. Any substitution must be validated against the manufacturer datasheets and the target design requirements.
What are the resolution and conversion characteristics of these two ADCs?
Both are 8-bit successive-approximation ADCs. The ADC0832CCN provides 8-bit resolution over its 2-channel multiplexer with a serial output. The ADC0808CCN/NOPB provides 8-bit resolution over its 8-channel multiplexer with a parallel output. For exact conversion time, clock frequency, and accuracy specifications, refer to the respective manufacturer datasheets, as these parameters depend on the applied clock and reference conditions.