Part A
ADC0809CCN
Texas Instruments
- Lifecycle
- Active
- Stock
- 5334 PCS
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
ADC0832CCN and ADC0809CCN are not functionally interchangeable: the ADC0832CCN is a 2-channel 8-bit serial (SPI-like) ADC in an 8-pin DIP, while the ADC0809CCN is an 8-channel 8-bit parallel ADC in a 28-pin DIP with an on-chip multiplexer and address latch. The differing channel count, output interface, package footprint, and conversion architecture require a board redesign and firmware rewrite, so neither device can directly substitute for the other.
Different output interface
Different channel count
Different package footprint
Different conversion architecture
Parts at a glance
Part B
ADC0832CCN
Texas Instruments
- Lifecycle
- Active
- Stock
- 5986 PCS
- Package
- PDIP-8
- 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 | ADC0832CCN | ADC0809CCN | Why it matters |
|---|---|---|---|
| Resolution | 8 bits | 8 bits | Both provide 8-bit resolution, so quantization step size is comparable for a given reference voltage. |
| Number of Input Channels | 2 (single-ended) or 1 (differential) | 8 (single-ended) | Channel count determines how many analog signals can be multiplexed into one converter; the ADC0809 supports far more inputs. |
| Interface Type | Serial (SPI-compatible, 2-wire) | Parallel (8-bit data bus) | Serial vs parallel interface affects microcontroller pin count, wiring complexity, and firmware design. |
| Conversion Architecture | Successive approximation | Successive approximation | Both use SAR conversion, giving similar speed/accuracy tradeoffs, but the surrounding circuitry differs. |
| 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. |
| Package | 8-pin DIP (PDIP) | 28-pin DIP (PDIP) | Different pin counts and footprints mean the parts are not drop-in replacements on the same PCB. |
| 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 signals. |
| Reference Input | External VREF (with VCC/2 option) | External VREF(+) and VREF(-) | Reference configuration determines input voltage range and measurement scaling flexibility. |
| Operating Temperature Range | 0°C to +70°C (commercial) | 0°C to +70°C (commercial) | Both are commercial-grade parts, limiting use to benign ambient environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADC0809CCN | ADC0832CCN |
|---|---|---|
| Part Status | Obsolete | Obsolete |
| Base Product Number | ADC0809 | - |
| Number of Bits | 8 | 8 |
| Sampling Rate (Per Second) | 10k | - |
| Number of Inputs | 8 | 2 |
| Input Type | Single Ended | Differential, Pseudo-Differential, Single Ended |
| Data Interface | Parallel | SPI |
| Configuration | MUX-S/H-ADC | MUX-ADC |
| Ratio - S / H: ADC | 1:1 | - |
| Number of A / D Converters | 1 | - |
| Architecture | SAR | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 4.5V ~ 6.5V | 4.5V ~ 6.3V |
| Voltage - Supply, Digital | 4.5V ~ 6.5V | 4.5V ~ 6.3V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Through Hole | - |
| Packaging | Tube | - |
| Sampling Rate(Per Second) | - | 31.25k |
| Number of A/D Converters | - | 1 |
Frequently asked questions
What are the key architectural differences between the ADC0832CCN and ADC0809CCN?
The ADC0832CCN is an 8-bit successive-approximation ADC with a 2-channel multiplexer and serial (SPI-compatible) output, housed in an 8-pin DIP. The ADC0809CCN is an 8-bit successive-approximation ADC with an 8-channel multiplexer and parallel 8-bit output, housed in a 28-pin DIP. The ADC0832 provides a single differential or two single-ended inputs, while the ADC0809 provides eight single-ended inputs.
Can the ADC0832CCN and ADC0809CCN be used as direct substitutes for each other?
No. They differ in package (8-pin vs 28-pin DIP), interface (serial vs parallel), channel count (2 vs 8), and pinout. A direct drop-in replacement is not possible; a redesign of the PCB and microcontroller interface would be required.
What is the resolution and conversion type of both devices?
Both the ADC0832CCN and ADC0809CCN are 8-bit successive-approximation ADCs. Each provides 8-bit resolution with an inherent quantization step of VREF/256.
How do the input channel configurations differ?
The ADC0832CCN offers two input channels that can be configured as two single-ended inputs or one differential input. The ADC0809CCN provides eight single-ended input channels selected via a 3-bit address input (A, B, C) with an address latch.
What are the differences in digital interface and pin count?
The ADC0832CCN uses a serial interface (CS, CLK, DI, DO) and is packaged in an 8-pin DIP. The ADC0809CCN uses a parallel 8-bit data bus (D0–D7) with control signals (START, EOC, OE, ALE) and is packaged in a 28-pin DIP.
Do both devices require an external clock?
The ADC0832CCN requires an external clock supplied on the CLK pin for serial data transfer and conversion timing. The ADC0809CCN requires an external clock input (CLK) for its successive-approximation conversion; it does not include an internal oscillator.
What are the typical supply voltage and reference requirements?
Both devices operate from a single 5 V supply (VCC = 5 V typical). The ADC0832CCN uses VCC as its reference and supports a 0 to VCC analog input range. The ADC0809CCN uses VREF(+) and VREF(−) pins to set the analog input span, typically 0 to 5 V.
Which device is better suited for multi-channel data acquisition?
The ADC0809CCN is better suited for multi-channel data acquisition because it provides eight single-ended input channels with an address latch, whereas the ADC0832CCN provides only two input channels (or one differential pair).