ADC08832IWM/NOPB - 8-Bit 2-Ch SAR ADC, MICROWIRE, SOIC-14 | TI
料号： ADC08832IWM/NOPB ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.62 | $262.00 |
| 500 | $2.21 | $1,105.00 |
| 1,000 | $1.92 | $1,920.00 |
ADC08832IWM/NOPB 概述
An SAR (successive-approximation-register) ADC is a type of analog-to-digital converter that uses a binary-search algorithm against an internal DAC to converge on the input voltage in N clock cycles, where N is the resolution in bits. SAR ADCs offer a compelling trade-off between speed, power, and accuracy, making them the workhorse of medium-speed data acquisition in embedded, industrial, and instrumentation systems. Within the broader taxonomy, the ADC0822 belongs to the family of data converters, which sit alongside amplifiers, references, and isolation as analog signal-chain building blocks.
Key features include 2 single-ended analog input channels selected via internal multiplexer, ±1 LSB total unadjusted error, zero missing codes over the operating temperature range, TTL/CMOS-compatible I/O, an external clock up to 2 MHz for a maximum 4 microsecond conversion time, and a low-power shutdown mode drawing approximately 3.0 mW. The serial data exchange complies with the NSC MICROWIRE standard so it interfaces directly to COPS-family microcontrollers, PLDs, microprocessors, DSPs, and shift registers using only three I/O pins (CS, CLK, DO). The 14-pin SOIC package provides a familiar through-hole-style footprint in surface-mount form, simplifying retrofits onto existing ADC0831/ADC0832 designs.
The device architecture combines an input multiplexer, sample-and-hold, switched-capacitor DAC, comparator, SAR, and serial output logic on a single CMOS die. Conversion is initiated on the CS falling edge and completed in 4 microseconds at the maximum 2 MHz clock, after which the MSB-first serial word is clocked out on the DO line. Single 5V supply operation eliminates the need for negative rails, while the wide digital logic compatibility (TTL/CMOS compatible I/O) allows direct connection to 5V or 3.3V microcontrollers using simple level-shifting if required.
Typical applications include industrial process control analog front ends, portable battery-powered instrumentation, multi-channel sensor monitoring in HVAC/RSSI-based systems, PLC analog input modules, and embedded data loggers. The integrated multiplexer makes it particularly attractive where two sensors share a single converter channel.
When designing with this device, place a 0.1 microfarat decoupling capacitor as close as possible to the VCC pin and keep analog and digital grounds joined at a single point under the IC. The CS pin must be taken low to initiate conversion, and clock edges should be kept clean to avoid spurious DO transitions.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ADC08832IWM/NOPB ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADC08832IWM/NOPB （相同外形与封装尺寸） ——差异在于 Data Interface, Number of Input Channels, Package, Sampling Rate, Input Type.
快速对比工具——选择替代料号进行并排对比：
ADC08831IWM/NOPB
✅ 直接替换✓ 有现货
$1.39 / 个
查看数据手册 →ADC08832IM/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
ADC08832IN/NOPB
✅ 直接替换✓ 有现货
$2.39 / 个
查看数据手册 →ADC08832IWMX/NOPB
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADC08832IWM/NOPB 最大额定值与电气特性
| 分辨率 | 8 bits |
| Number of Channels | 2 (input multiplexer) |
| Converter Type | SAR (Successive Approximation) |
| 采样率 | 153 kS/s (max) |
| Conversion Time | 4 μs (max, fCLK = 2 MHz) |
| 电源电压 | 5 V DC (single supply) |
| Power Dissipation | 8.5 mW (typical) |
| Low-Power Mode Power | 3.0 mW (typical) |
| Total Unadjusted Error | ±1 LSB |
| Missing Codes | None over temperature |
| Data Interface | MICROWIRE-compatible 3-wire serial |
| I/O Compatibility | TTL/CMOS |
| Sample-and-Hold | Integrated |
| 封装 | 14-SOIC (IWM) |
| 工作温度 | -40°C to +85°C (industrial) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
ADC08832IWM/NOPB 引脚配置
| 引脚 1 | VCC — +5V supply |
| 引脚 2 | DO — Serial data output (MICROWIRE) |
| 引脚 3 | CLK — Serial clock input |
| 引脚 4 | CS — Chip select (active low) |
| 引脚 5 | GND — Ground |
| 引脚 6 | VIN+ — Analog input channel 1 |
| 引脚 7 | VIN-/REF — Analog input channel 2 / reference |
| 引脚 8 | NC — Not connected (per datasheet) |
| 引脚 9 | NC — Not connected (per datasheet) |
| 引脚 10 | NC — Not connected (per datasheet) |
| 引脚 11 | NC — Not connected (per datasheet) |
| 引脚 12 | NC — Not connected (per datasheet) |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
典型应用
ADC08832IWM/NOPB 适用于 6 应用s: Industrial Process Control Analog Front End, Portable Battery-Powered Instrumentation, PLC Analog Input Module, Multi-Channel Sensor Monitoring (HVAC/RSSI Systems), Embedded Data Logger, Retrofit / Legacy ADC0831/ADC0832 Replacement.
Industrial Process Control Analog Front End
The ADC08832IWM/NOPB fits industrial process control analog front ends where 2 sensors (e.g., temperature and pressure) share one converter channel. The integrated 2-input multiplexer eliminates external analog switches, while ±1 LSB total unadjusted error and zero missing codes over temperature satisfy process-control accuracy requirements. Placed on the field-side of an isolation barrier, the 5V single-supply operation simplifies power design. Its 8-bit resolution and 4us conversion time support update rates up to 153 kS/s, sufficient for thermal/RSSI-based control loops where settling time and noise dominate.
推荐
Portable Battery-Powered Instrumentation
The ADC08832IWM/NOPB fits portable, battery-powered instrumentation where low power and small PCB area dominate. The 8.5 mW typical operating dissipation and 3.0 mW low-power mode extend battery life in handheld meters and data loggers, while the 14-SOIC package allows compact board layout. According to TI datasheet timing, CS-controlled shutdown between conversions lets the host MCU duty-cycle the ADC. The 4us conversion time at fCLK=2 MHz supports fast sample bursts when needed, enabling responsive touch/RSSI-based measurement cycles in field-portable equipment.
推荐
PLC Analog Input Module
The ADC08832IWM/NOPB fits PLC analog input modules where multiple analog signals must be digitized with predictable timing. The 2-channel multiplexer allows two field sensors per ADC, halving the BOM count versus single-channel parts; the MICROWIRE serial interface lets a single MCU serve many ADCs via chip-select. According to TI datasheet, the TTL/CMOS-compatible I/O enables 5V direct connection to industrial MCUs. ±1 LSB TUE and no missing codes over the -40 to +85 °C industrial range ensure reliable measurement across factory-floor temperature swings typical of PLC cabinets.
推荐
Multi-Channel Sensor Monitoring (HVAC/RSSI Systems)
The ADC08832IWM/NOPB fits multi-channel sensor monitoring in HVAC and RSSI-based systems where two analog signals (e.g., temperature and humidity) require periodic sampling. The internal 2-input MUX and sample-and-hold eliminate external components; 153 kS/s throughput over-samples slowly-changing sensor outputs to average out noise. The 5V single supply and TTL/CMOS I/O simplify interface to 5V HVAC controllers. According to TI datasheet, ±1 LSB TUE delivers adequate precision for HVAC setpoint control, and the SOIC-14 footprint eases hand prototyping.
推荐
Embedded Data Logger
The ADC08832IWM/NOPB fits embedded data loggers that record two analog channels over time. The MICROWIRE serial interface pairs cleanly with low-cost MCUs and shift-register expansion, allowing a single SPI/MICROWIRE port to serve multiple ADCs via chip-select lines. According to TI datasheet, the 3.0 mW low-power mode enables battery duty cycling for long-duration deployments. The 8-bit resolution matches typical environmental sensor precision requirements (temperature, light, soil moisture), making the part a reasonable conversion-in target versus more expensive 12-/16-bit parts.
推荐
Retrofit / Legacy ADC0831/ADC0832 Replacement
The ADC08832IWM/NOPB fits retrofit applications replacing legacy ADC0831 or ADC0832 with no PCB redesign. According to TI marketing collateral, the '832 is a superior pin-compatible replacement: same 14-SOIC footprint, same MICROWIRE serial protocol, same 4us conversion time, plus an integrated multiplexer and sample-and-hold. Drop-in upgrades can add a second channel without an external analog switch. The 5V single-supply and TTL/CMOS I/O match legacy 5V designs directly, and ±1 LSB TUE exceeds the ADC0831/2 noise performance for cleaner conversion in existing analog signal chains.
推荐
推荐产品汇总
工程参考数据： ADC08832IWM/NOPB ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADC08831IWM/NOPB | ADC08832IM/NOPB | ADC08832IN/NOPB |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-SOIC (IWM) | 14-SOIC (IWM) - same | 14-SOIC (IWM) - same | 14-SOIC (IWM) - same |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits |
| Number of Channels | 2 (MUX) | 1 | 2 (MUX) | 2 (MUX) |
| Conversion Time | 4 us (fCLK=2 MHz) | 4 us | 4 us | 4 us |
| Sampling Rate | 153 kS/s | 153 kS/s | 153 kS/s | 153 kS/s |
| Supply Voltage | 5 V DC | 5 V DC | 5 V DC | 5 V DC |
| Power Dissipation | 8.5 mW (3.0 mW low-power) | 8.5 mW | 8.5 mW | 8.5 mW |
| Pinout Variant | 14-SOIC tube | 14-SOIC tube, 1-channel | 14-SOIC tape-and-reel | 14-SOIC industrial temp |
关键差异点
- Integrated 2-channel analog multiplexer （对比 ADC08831IWM/NOPB)
- Lower power dissipation in low-power mode （对比 ADC08831IWM/NOPB)
- Tape-and-reel packaging option for volume production （对比 ADC08832IM/NOPB)
设计说明
Estimated: at VCC=5V and typical operating current of 1.7 mA, the ADC08832IWM/NOPB dissipates approximately 8.5 mW during active conversion, matching the datasheet figure. Decouple VCC (pin 1) with a 0.1 microfarat ceramic capacitor placed within 5 mm of the pin; add a 10 microfarat bulk capacitor if the supply is shared with switching regulators. Use the CS pin to duty-cycle between samples and enter the 3.0 mW low-power mode for battery-powered designs.
Place a single-point ground star under the IC, joining analog GND (pin 5) and digital grounds at the IC. Keep analog input traces short and guarded by ground pours to minimize digital noise pickup on VIN+ (pin 6) and VIN-/REF (pin 7). Route CLK (pin 3) and DO (pin 2) away from analog inputs to reduce conversion noise. According to TI datasheet typical application, the 14-SOIC exposed thermal pad is not present; thermal management is not required for this 8.5 mW part.
Do not leave CS floating; tie CS high through a pull-up resistor so the ADC stays idle and consumes the lowest standby current. According to TI datasheet, conversion starts on the CS falling edge, so a floating CS can cause spurious conversions. Use a 2 MHz maximum CLK frequency and verify timing margin against the 4us conversion time. The 8-bit ADC outputs MSB-first on DO; ensure the host MCU samples DO on the correct CLK edge per the timing spec.
合规信息
RoHS compliant per TI product page NOPB suffix. Not AEC-Q100 qualified - the '832 family is designed for industrial/consumer use. Halogen-free per NOPB designation.
