ADC0832CCWM - 8-Bit Serial I/O ADC w/ 2-Ch MUX | Texas Instruments
부품 번호: ADC0832CCWM ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $6.8 | $6.80 |
| 10 | $6.12 | $61.20 |
| 100 | $5.44 | $544.00 |
| 500 | $4.89 | $2,445.00 |
| 1,000 | $4.35 | $4,350.00 |
ADC0832CCWM 개요
A Successive Approximation Register (SAR) ADC is a sampled-data converter that uses an internal binary-weighted capacitor DAC and a comparator to perform a bit-by-bit search for the analog input level. Compared with integrating or flash converters, SAR ADCs offer a balanced trade-off between speed, accuracy, and cost for moderate-resolution measurement channels. The ADC0832 sits in the signal chain between analog sensors (temperature, position, voltage, current) and a microcontroller's digital domain, where it serves as the bridge that converts real-world analog signals into a serial bitstream that the MCU can read over a 2- or 3-wire synchronous interface. Within the broader hierarchy, the ADC0832 is classified as an ADC -> data converter -> signal chain IC -> semiconductor device.
Key specifications include 8-bit resolution, ±½ LSB and ±1 LSB total unadjusted error grades (designated by the C and B suffix variants), a 5 V DC single-supply operating range, 15 mW typical power dissipation, and a 32 µs typical conversion time. The serial data interface uses CS, CLK, and DO pins to deliver the conversion result to the host controller, eliminating the need for a parallel data bus. The device is specified for an operating temperature range of -40 °C to +85 °C.
The architecture uses a switched-capacitor DAC together with a chopper-stabilized comparator, allowing differential-style ratiometric measurements when paired with a reference voltage applied across the analog input span. Two software-selectable analog input channels make it suitable for measuring two sensors with one converter. The serial interface simplifies opto-isolation of the data path in noisy industrial environments.
Typical applications include portable battery-operated instrumentation, remote-sensor data acquisition over isolated serial links, process-control front-ends, simple digital panel meters, and embedded 5 V MCU analog input modules. Designers should note that the part is in the legacy ADC083x-N family and is not recommended for new designs where TI suggests migrating to modern 12-/16-bit SAR converters such as the ADS1232 or ADS101x/ADS111x I²C family.
드롭인 대체품: ADC0832CCWM — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ADC0832CCWM (동일 폼 팩터 및 풋프린트) — 차이점: Data Interface, Input Type, Supply Voltage, Conversion Time, Architecture.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ADC0831CCWM
✅ 드롭인✓ 재고 있음
$2.65 / 개
데이터시트 보기 →ADC0834CCWM
✅ 드롭인✓ 재고 있음
$1.9 / 개
데이터시트 보기 →ADC0832CCWM 최대 정격 & 전기적 특성
| 분해능 | 8 bit |
| Number of Channels | 2 (single-ended, software selectable) |
| Architecture | SAR (Successive Approximation Register) |
| Input Type | Single-ended, pseudo-differential via MUX |
| 공급 전압 | 5 V DC (single supply) |
| Conversion Time | 32 µs (typical) |
| Total Unadjusted Error (TUE) | ±½ LSB (C grade) / ±1 LSB (B grade) |
| Power Dissipation | 15 mW (typical) |
| Data Interface | Serial (CS / CLK / DO), TTL/MOS compatible |
| 동작 온도 | -40 °C to +85 °C |
| 패키지 | 14-SOIC (WM) |
| 실장 유형 | Surface Mount |
| Input Multiplexer | 2:1 (single-ended) / 1 differential |
| RoHS 상태 | Compliant (NOPB suffix) |
ADC0832CCWM 핀 구성
| 핀 1 | CS — Chip Select (active low) - enables serial interface |
| 핀 2 | CLK — Serial Clock input |
| 핀 3 | DO — Serial Data Output |
| 핀 4 | DI — Serial Data Input / MUX select |
| 핀 5 | GND — Ground |
| 핀 6 | VIN+ — Analog Input Channel 0 (single-ended positive) |
| 핀 7 | VIN- — Analog Input Channel 1 (single-ended negative / pseudo-diff) |
| 핀 8 | VREF — Voltage Reference input |
| 핀 9 | VCC — +5 V DC supply |
| 핀 10 | NC — Not connected |
| 핀 11 | NC — Not connected |
| 핀 12 | NC — Not connected |
| 핀 13 | NC — Not connected |
| 핀 14 | NC — Not connected |
일반적인 애플리케이션
ADC0832CCWM 적합 용도: 6 애플리케이션s: Battery-Operated Sensor Module, Industrial Process Control Front-End, Digital Panel Meter / DPM, Opto-Isolated Data Acquisition, Embedded MCU Analog Input Module, Automotive Sensor Interface (Non-Safety).
Battery-Operated Sensor Module
The ADC0832CCWM is well-suited to portable battery-powered sensor modules because it operates from a single 5 V supply at only 15 mW typical dissipation, allowing two analog sensors (e.g., temperature + pressure) to share one 8-bit ADC over a 3-wire serial link. Per the ADC0832-N datasheet, the SAR architecture and 32 µs conversion time provide adequate throughput for slow environmental telemetry, while the low pin count (CS/CLK/DO) preserves board area for battery management and BLE radios. Use a 5 V LDO upstream and add 0.1 µF bypass at VCC.
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Industrial Process Control Front-End
Factory automation PLCs and 4-20 mA loop interfaces benefit from the ADC0832CCWM's 2-channel MUX and TTL-compatible serial interface, which simplifies opto-isolation of the data path in noisy industrial environments. According to the ADC0832-N datasheet, the ±½ LSB C-grade linearity is sufficient for 8-bit process-variable readouts (pressure, level, flow), and the serial I/O allows isolation barriers to use only 3 optocouplers instead of 8 for a parallel ADC. Operate from a regulated 5 V rail and decouple with 10 µF + 0.1 µF at the IC.
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Digital Panel Meter / DPM
Handheld digital multimeters and panel meters frequently use the ADC0832CCWM as the measurement core because it provides 8-bit resolution (~1% full-scale accuracy), a 2-channel MUX for voltage and current measurements, and a serial output that drives an MCU's LCD segment driver. Per the datasheet, the pseudo-differential input pair (CH0/CH1) supports direct connection to a current-sense shunt, simplifying the analog front-end. Expect ~32 µs per conversion — more than adequate for 3 readings/second DPM update rates.
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Opto-Isolated Data Acquisition
Medical and industrial isolation barriers commonly place the ADC0832CCWM on the high-voltage analog side and route only CS, CLK, DO across optocouplers to a safe-side MCU. The serial interface minimizes the optocoupler count to three (vs. eight for a parallel ADC) and the 8-bit resolution meets IEC 60601-1 monitoring channel requirements for non-critical patient vitals. The SAR conversion is monotonic and the 5 V single supply simplifies isolated DC-DC design. Per the datasheet, keep CLK ≤ typical fCLK to avoid optocoupler timing errors.
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Embedded MCU Analog Input Module
Legacy 8051, PIC, and MSP430 systems that lack an on-chip ADC can use the ADC0832CCWM to add two analog channels via three GPIO pins, without consuming the parallel bus. Per the ADC0832-N datasheet, the serial protocol is trivially bit-banged from any MCU, and the 32 µs conversion time is fast enough for control loops at 1 kHz. The 14-SOIC footprint keeps the BOM small and is hand-solderable for prototypes and educational kits. Place VCC decoupling within 5 mm of pin 9.
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Automotive Sensor Interface (Non-Safety)
Although the ADC0832CCWM is not AEC-Q100 qualified, it can still serve in non-safety automotive subsystems such as interior climate sensors, seat-occupancy detection, and aftermarket accessories where the 8-bit resolution and 5 V supply are adequate. The 2-channel MUX reads two analog sensors (e.g., temperature + humidity) with one serial link to a body-control MCU. Per the datasheet, the -40 °C to +85 °C operating range covers most cabin environments. For safety-critical or under-hood applications, choose AEC-Q100-qualified alternatives.
추천
추천 제품 요약
엔지니어링 참조 데이터: ADC0832CCWM — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ADC0831CCWM | ADC0834CCWM | ADC0838CCWM |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-SOIC (WM) | 14-SOIC (WM) - same | 14-SOIC (WM) - same | 20-SOIC (different footprint) |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit |
| Number of Channels | 2 (single-ended) | 1 (single-ended) | 4 (single-ended) | 8 (single-ended) |
| Architecture | SAR | SAR | SAR | SAR |
| Supply Voltage | 5 V single | 5 V single | 5 V single | 5 V single |
| Conversion Time (typ) | 32 µs | 32 µs | 32 µs | 32 µs |
| Power Dissipation (typ) | 15 mW | 15 mW | 15 mW | 15 mW |
| Interface | Serial (CS/CLK/DO/DI) | Serial (CS/CLK/DO/DI) | Serial (CS/CLK/DO/DI) | Serial (CS/CLK/DO/DI) |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
주요 차별점
- 2-channel MUX in a 14-SOIC package with serial I/O (vs ADC0831CCWM)
- Smaller 14-SOIC footprint vs 20-SOIC for 8-channel version (vs ADC0838CCWM)
- Mature, multi-sourced legacy part with extensive documentation (vs ADC0804LCWM (parallel output))
설계 노트
The ADC0832CCWM operates from a single 5 V supply and draws ~3 mA quiescent (≈15 mW dissipation per the datasheet). Add a 10 µF tantalum + 0.1 µF ceramic decoupling network within 5 mm of the VCC pin to suppress switching noise from upstream digital logic. For battery-powered applications, gate the 5 V rail with a low-Iq LDO and power-down the ADC in software via the CS pin to extend battery life.
Route the serial interface traces (CS, CLK, DO) away from analog input traces to minimize digital-to-analog crosstalk. Keep the analog input traces short and guarded with a ground plane to reduce pickup. The 14-SOIC footprint allows hand-soldering and standard SOIC-14 sockets; leave 1 mm clearance around the exposed pad region if used. Per the datasheet, VREF should be bypassed with 0.1 µF to GND close to pin 8.
Do not operate the ADC0832CCWM below 4.5 V or above 5.5 V — the datasheet specifies 5 V ±10%. Avoid applying analog inputs that exceed VCC or fall below GND; the input protection diodes will forward-bias and inject error into the conversion. The serial protocol requires CS to be toggled between conversions — leaving CS low latches the MUX at the previous setting and can cause channel-confusion bugs. Refer to the ADC0832-N datasheet timing diagram for proper CS/CLK/DO sequencing.
For ratiometric measurements (e.g., bridge sensors), drive VREF from the bridge excitation voltage to cancel excitation drift. The pseudo-differential input pair (VIN+/VIN-) can reject small common-mode noise within the supply range. For best 8-bit accuracy, place a 100 Ω series resistor and 1000 pF cap on each analog input to form a low-pass filter that limits broadband noise to the ADC's input bandwidth.
규정 준수 정보
RoHS compliance requires /NOPB suffix; base ADC0832CCWM is non-RoHS. Part is not AEC-Q100 qualified per TI datasheet NRND section — see TI E2E forum for automotive alternatives.
