ADC0809CCN - 8-Bit 8-Channel SAR ADC | 10kSPS | 28-DIP
MPN： ADC0809CCN ✓ 啟用中ADC0809CCN 概覽
What is a SAR ADC? A successive-approximation register ADC is a precision data converter that performs binary search against the input voltage using an internal DAC and comparator, producing one bit per clock cycle. SAR ADCs combine low latency, deterministic conversion time, and moderate resolution (typically 8 to 20 bits), making them the dominant architecture for multiplexed data-acquisition systems, motor control loops, and instrumentation front ends where DC accuracy and ease of microprocessor interfacing outweigh absolute sample rate.
Key features of the ADC0809CCN include 8 single-ended analog input channels selected by a 3-bit address latch, an end-of-conversion (EOC) output flag that triggers a CPU interrupt or status read, a programmable clock up to 1.1 MHz, and TTL/CMOS-compatible I/O that simplifies level shifting to 3.3 V or 5 V MCUs. The 256R voltage-divider reference ladder and chopper-stabilized comparator suppress input offset drift across the -40 °C to +85 °C industrial temperature range, enabling stable 8-bit readings without periodic recalibration in process-control panels and benchtop instrumentation.
The device uses a switched-capacitor DAC ladder that inherently tracks the analog input, providing excellent common-mode rejection of supply noise. Its 10 kSPS ceiling is well-matched to thermocouple, RTD, and process-variable sampling, while the integrated multiplexer eliminates the need for an external analog switch array, reducing both BOM cost and PCB area in legacy industrial designs.
Typical applications include multi-zone temperature monitoring, factory-floor sensor aggregation, panel-meter and digital-multimeter front ends, legacy 8051-based process controllers, and battery-cell monitoring in uninterruptible power supplies. The DIP-28 footprint also makes it a popular drop-in for educational labs and retrocomputing ADC boards.
When designing with this part, place a 0.1 µF decoupling capacitor as close as possible to VCC and a 10 µF bulk capacitor at the analog supply; the internal reference ladder draws transient current during each bit trial and is sensitive to supply ripple. Avoid driving unused analog inputs with floating signals - tie them to a defined mid-supply voltage to prevent channel-to-channel crosstalk through the multiplexer.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, enabling faster sourcing and lifecycle decisions for new designs and legacy maintenance.
直接替換替代品，適用於 ADC0809CCN — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADC0809CCN （相同外形與佔位） — 差異在於 Package, Mounting Type, Resolution, Operating Temperature, Analog Input Voltage Range.
ADC0809CCN/NOPB
✅ 直接替換聯絡詢價
查看資料表 →ADC0808CCN
✅ 直接替換📋 參考替代品（不在目錄中）
ADC0808CCV
✅ 直接替換📋 參考替代品（不在目錄中）
ADC0809CCV
✅ 直接替換📋 參考替代品（不在目錄中）
ADC0809CCN 最大額定值與電氣特性
| 解析度 | 8 bits |
| Architecture | Successive Approximation (SAR) |
| Number of Channels | 8 single-ended |
| Sample Rate (max) | 10 kSPS |
| Input Type | Single-Ended, Multiplexed |
| Supply Voltage (VCC) | 4.5 V to 5.25 V (5 V typical) |
| Analog Input Voltage Range | 0 V to VCC |
| Integral Nonlinearity (INL) | ±1 LSB max |
| Differential Nonlinearity (DNL) | ±1 LSB max (no missing codes) |
| Clock Frequency | 10 kHz to 1.1 MHz |
| 參考電壓 | Internal 256R ladder, VREF+ / VREF- pins |
| Digital I/O Logic Level | TTL/CMOS compatible |
| 工作溫度 | -40 °C to +85 °C |
| 封裝 | 28-pin PDIP (through-hole) |
| 安裝類型 | Through-Hole (DIP) |
| RoHS 狀態 | Compliant (NOPB variant); non-compliant legacy |
| Output Interface | 8-bit parallel, tri-state latched |
| Channel Selection | 3-bit address latch (A0/A1/A2) |
ADC0809CCN 腳位配置
| 腳位 1 | IN3 — Analog input channel 3 |
| 腳位 2 | IN4 — Analog input channel 4 |
| 腳位 3 | IN5 — Analog input channel 5 |
| 腳位 4 | IN6 — Analog input channel 6 |
| 腳位 5 | IN7 — Analog input channel 7 |
| 腳位 6 | START — Start of conversion pulse input |
| 腳位 7 | EOC — End of conversion output flag |
| 腳位 8 | D0 — Data output bit 0 (LSB) |
| 腳位 9 | D1 — Data output bit 1 |
| 腳位 10 | D2 — Data output bit 2 |
| 腳位 11 | D3 — Data output bit 3 |
| 腳位 12 | D4 — Data output bit 4 |
| 腳位 13 | D5 — Data output bit 5 |
| 腳位 14 | D6 — Data output bit 6 |
| 腳位 15 | D7 — Data output bit 7 (MSB) |
| 腳位 16 | VREF- — Reference voltage negative input (typically GND) |
| 腳位 17 | VREF+ — Reference voltage positive input (full-scale) |
| 腳位 18 | VCC — +5V positive supply |
| 腳位 19 | GND — Digital ground |
| 腳位 20 | ALE — Address latch enable input |
| 腳位 21 | A0 — Channel address bit 0 |
| 腳位 22 | A1 — Channel address bit 1 |
| 腳位 23 | A2 — Channel address bit 2 |
| 腳位 24 | IN0 — Analog input channel 0 |
| 腳位 25 | IN1 — Analog input channel 1 |
| 腳位 26 | IN2 — Analog input channel 2 |
| 腳位 27 | CLOCK — Conversion clock input (10 kHz to 1.1 MHz) |
| 腳位 28 | VEE — Negative supply (typically GND in unipolar 5V designs) |
典型應用
ADC0809CCN 適用於 6 應用s: Multi-Zone Industrial Temperature Monitoring, Battery-Cell Monitoring in UPS Systems, Process Control and Panel Meter Front Ends, Legacy Microprocessor Data Acquisition Boards, Automotive Sensor Aggregation, Educational Lab and Hobby Electronics.
Multi-Zone Industrial Temperature Monitoring
The ADC0809CCN's integrated 8-channel multiplexer makes it ideal for multi-zone industrial temperature monitoring systems, where a single ADC sequentially reads 8 thermocouple-conditioned inputs without external analog switches. Its 10 kSPS sample rate is well-matched to thermocouple thermal time constants (typically 1-5 seconds), and its ±1 LSB INL with no missing codes preserves calibration accuracy across -40 °C to +85 °C factory-floor environments. The 28-DIP package and 5V supply simplify integration with legacy PLC backplanes and 8051-based controller boards.
推薦
Battery-Cell Monitoring in UPS Systems
The ADC0809CCN's 8 single-ended inputs support direct monitoring of up to 8 individual battery cells (1.2V-12V nominal each) in a UPS or telecom backup system. Its 0V-VCC input range accommodates 12V lead-acid cells when scaled by a precision resistor network, and the 256R internal reference ladder provides ratiometric measurements that reject power-supply drift. The EOC flag enables interrupt-driven cell sampling without polling, and the 28-DIP through-hole package withstands the mechanical stress of bolted battery-cabinet assemblies.
推薦
Process Control and Panel Meter Front Ends
The ADC0809CCN is a long-standing workhorse for 4-20 mA process-control loops and digital panel meters, where 8-bit resolution (0.4% FS) is sufficient for valve-position readback, flow-rate indicators, and pressure-gauge displays. The 5V single-supply operation matches legacy analog signal-conditioning front ends, and the parallel 8-bit output bus drops directly into 8051, 8080, and 68HC11 data buses without glue logic. Its 1.1 MHz maximum clock supports continuous 10 kSPS scanning with deterministic latency for closed-loop PID control software.
推薦
Legacy Microprocessor Data Acquisition Boards
The ADC0809CCN's parallel 8-bit tri-state output and ALE-driven channel addressing make it purpose-built for legacy 8080, 8051, Z80, and 68HC11 data-acquisition boards. It maps directly into the lower byte of a 16-bit data bus and shares memory-mapped I/O with TTL peripheral decoders, eliminating the need for an external address latch. The 28-PDIP footprint and 5V supply match retrocomputing ISA-bus ADC cards and educational lab boards where the part has been continuously supported for 40+ years.
推薦
Automotive Sensor Aggregation
The ADC0809CCN's 8-channel multiplexer and 8-bit resolution suit non-safety-critical automotive sensor aggregation such as cabin climate sensors, seat-position encoders, and battery-pack telemetry in older 12V platforms. Its -40 °C to +85 °C industrial temperature grade covers cabin and under-hood environments for non-safety applications, and its DIP-28 package supports through-hole PCB assemblies common in automotive aftermarket modules. Modern designs should use AEC-Q100-qualified parts like AD7276 for new platforms.
推薦
Educational Lab and Hobby Electronics
The ADC0809CCN is a staple of undergraduate electrical-engineering labs and Arduino/Raspberry Pi hobby projects, where students learn SAR conversion, multiplexing, and bus interfacing using a through-hole 28-DIP that is easy to breadboard. Its 5V supply matches common lab power supplies and microcontroller breakout boards, and the parallel output can be displayed on 7-segment LED arrays or 1602 LCD displays without complex serial-protocol libraries. The 8-channel input pairs naturally with the 8-bit data bus for teaching byte-level data manipulation.
推薦
推薦產品摘要
工程參考資料，適用於 ADC0809CCN — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADC0809CCN/NOPB | ADC0808CCN | ADC0808CCV | ADC0809CCV |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-DIP (PDIP) | 28-DIP (PDIP) - same | 28-DIP (PDIP) - same | 28-DIP (ceramic) - same pinout | 28-DIP (ceramic) - same pinout |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits |
| Number of Channels | 8 single-ended | 8 single-ended | 8 single-ended | 8 single-ended | 8 single-ended |
| Sample Rate (max) | 10 kSPS | 10 kSPS | 10 kSPS | 10 kSPS | 10 kSPS |
| INL (max) | ±1 LSB (no missing codes) | ±1 LSB (no missing codes) | ±½ LSB (missing codes possible) | ±½ LSB | ±1 LSB |
| Supply Voltage | 4.5 V to 5.25 V | 4.5 V to 5.25 V | 4.5 V to 5.25 V | 4.5 V to 5.25 V | 4.5 V to 5.25 V |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -55 °C to +125 °C (military) |
| RoHS Status | Non-compliant (SnPb) | Compliant (lead-free) | Non-compliant | Non-compliant | Non-compliant |
| Unit Price (qty 1, as of 2026-10-12) | $5.95 | $6.10 | $4.85 | $7.50 | $8.20 |
主要差異化特點
- Integrated 8-channel multiplexer eliminates external analog switches (對比ADC0831CCN)
- No-missing-codes 8-bit conversion guarantee (對比ADC0808CCN)
- Direct parallel bus interface to legacy 8-bit microprocessors (對比AD7992BRMZ-1-R2)
設計說明
Estimated: Place a 0.1 µF ceramic decoupling capacitor within 5 mm of the VCC pin (pin 18) and a 10 µF tantalum bulk capacitor at the PCB power-entry point. The internal 256R reference ladder draws transient current during each bit trial; without local decoupling, this noise couples into the analog input through the supply pin and degrades INL. Use a star-ground topology tying the ADC GND pin (19) directly to the analog ground plane rather than daisy-chaining through digital grounds.
Do not leave unused analog inputs floating - tie them to a defined mid-supply voltage (VCC/2) through a 10 kΩ resistor to prevent channel-to-channel crosstalk through the multiplexer. Pull the ALE and START pins HIGH when not actively converting to avoid spurious conversions triggered by noise. The EOC pin is open-collector in some revisions - verify the datasheet's pull-up requirement, typically 10 kΩ to VCC.
Route the analog input traces (IN0-IN7) as a guarded differential pair with ground fill on both sides, keeping them away from the digital bus (D0-D7) and clock traces. The chopper-stabilized comparator is sensitive to high-frequency digital edge rates; place a 100 Ω series ferrite bead on the digital supply (VDD) if noise pickup is observed. Maintain at least 3 mm of clearance between analog input pins and any switching regulator inductor or transformer windings on a 2-layer board.
合規資訊
Standard ADC0809CCN uses SnPb (tin-lead) terminations and is non-RoHS. Use ADC0809CCN/NOPB for RoHS-compliant lead-free designs. Not AEC-Q100 qualified; for automotive applications use AEC-Q100 parts like AD7276BRMZ-REEL.
