ADC08832IMM - 8-Bit 2-Ch Serial I/O CMOS ADC | VSSOP-8 | Texas Instruments
MPN： ADC08832IMM ✓ 啟用中ADC08832IMM 概覽
An ADC (analog-to-digital converter) is a semiconductor that converts real-world analog voltages into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. SAR ADCs sample the input, hold it on an internal capacitor, and run a binary search via an internal DAC until the digital output matches the analog input; they are valued for determinism, low latency, and a single conversion per request. The ADC08832 family is positioned for cost-sensitive, space-constrained embedded designs that need 8-bit resolution and serial connectivity rather than high-throughput parallel conversion.
Headline features include 8-bit resolution with no missing codes, a serial interface that requires only three wires (CS, CLK, DOUT) per the TI datasheet, an analog input range from GND to VCC, TTL/CMOS-compatible digital I/O, and an internal track-and-hold stage that eliminates the need for an external sample capacitor. The device is a drop-in upgrade for legacy ADC0831/ADC0832 designs and shares the same serial protocol, simplifying firmware migration.
Architecturally the part combines a 2-channel input multiplexer, a sample-and-hold amplifier, a SAR core, an internal reference-free DAC, and a state-machine-driven serial output stage. Power dissipation is approximately 8.5 mW typical, and the converter operates across the -40 C to +85 C industrial temperature range, making it suitable for both indoor and moderately harsh environments.
Typical applications include portable instrumentation, sensor signal digitization, battery monitoring systems, digital panel meters, process-control front ends, and any space-constrained embedded design that needs 8-bit accuracy on a single low-pin-count serial bus. Two multiplexer inputs allow designers to monitor a primary signal plus an auxiliary channel such as temperature or supply voltage with one ADC.
The primary design tradeoff is resolution - 8 bits limits dynamic range to roughly 48 dB - so choose a 10/12-bit SAR if finer steps are required. The serial interface also imposes throughput limits compared to parallel ADCs; at 2 MHz CLK and 16 clocks per conversion, maximum throughput is around 125 ksps per channel in 2-channel mode.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement the manufacturer datasheet and help engineers evaluate the ADC08832IMM against modern alternatives.
直接替換替代品，適用於 ADC08832IMM — 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： ADC08832IMM （相同外形與佔位） — 差異在於 Data Interface, Number of Input Channels, Resolution, Operating Temperature Range, Package.
ADC08831IMM/NOPB
✅ 直接替換聯絡詢價
查看資料表 →ADC08832IMM/NOPB
✅ 直接替換📋 參考替代品（不在目錄中）
ADC08832IWM/NOPB
✅ 直接替換聯絡詢價
查看資料表 →ADC08831IMX
✅ 直接替換聯絡詢價
查看資料表 →AD7992BRMZ-1-R2
✅ 直接替換聯絡詢價
查看資料表 →ADC08832IMM 最大額定值與電氣特性
| 解析度 | 8 bits |
| Number of Input Channels | 2 (single-ended, multiplexed) |
| Converter Architecture | SAR (Successive Approximation Register) |
| Analog Supply Voltage (VCC) | 4.5 V to 6.3 V |
| Conversion Time (fCLK = 2 MHz) | 4 us (max) |
| Data Interface | 3-Wire Serial (CS, CLK, DOUT) |
| Analog Input Voltage Range | GND to VCC |
| Track/Hold Function | Yes, internal |
| Power Dissipation (typical) | 8.5 mW |
| Digital I/O Compatibility | TTL/CMOS |
| 工作溫度範圍 | -40 C to +85 C |
| 封裝 | 8-VSSOP (DGK) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant (NOPB suffix) |
| Pin-Compatible Replacement For | ADC0831, ADC0832 |
ADC08832IMM 腳位配置
| 腳位 1 | VCC — Analog supply voltage (4.5 V to 6.3 V) |
| 腳位 2 | CH0 — Analog input channel 0 |
| 腳位 3 | CH1 — Analog input channel 1 |
| 腳位 4 | GND — Analog and digital ground |
| 腳位 5 | DOUT — Serial data output (MSB first) |
| 腳位 6 | CLK — Serial clock input |
| 腳位 7 | CS — Chip select (active low) |
| 腳位 8 | NC — Not connected (per datasheet) |
典型應用
ADC08832IMM 適用於 6 應用s: Portable Battery Monitoring, Industrial Process Control Sensors, Digital Panel Meters, Embedded Sensor Signal Digitization, Automotive Interior Sensor Hubs, Medical Monitoring Equipment.
Portable Battery Monitoring
The ADC08832IMM's 2-channel multiplexer and analog input range from GND to VCC make it a strong fit for portable battery monitoring. CH0 can digitize the pack voltage through a divider while CH2 samples a thermistor divider for cell temperature; the internal track-and-hold isolates each conversion. With 8.5 mW typical dissipation it does not drain battery-operated packs, and the 3-wire serial interface frees microcontroller pins for other tasks.
推薦
Industrial Process Control Sensors
In industrial process control the ADC08832IMM digitizes 4-20 mA current-loop signals via a shunt resistor, mapping the loop current into the GND-to-VCC input range. The 2-channel MUX lets a single ADC handle two redundant sensors for fault detection or one sensor plus a calibration reference. Its -40 C to +85 C operating range and TTL/CMOS-compatible serial interface suit PLC backplanes and remote I/O modules where industrial robustness and pin count matter.
推薦
Digital Panel Meters
Digital panel meters benefit from the ADC08832IMM's 8-bit resolution and small VSSOP-8 footprint. One channel measures the displayed voltage or current while the second channel reads a reference for auto-calibration. The serial DOUT interface directly drives LCD or LED drivers without parallel bus overhead, keeping PCB area small enough for handheld DMMs and bench instrument retrofits.
推薦
Embedded Sensor Signal Digitization
Microcontroller-based sensor designs pair well with the ADC08832IMM's 3-wire serial interface, which requires only three GPIOs (CS, CLK, DOUT) to read two analog channels. With 8-bit accuracy and 4 us conversion time it can digitize temperature, light, or pressure sensor outputs at hundreds of samples per second. The wide 4.5 V to 6.3 V supply range accommodates 5 V industrial rails and battery stacks up to 6 V.
推薦
Automotive Interior Sensor Hubs
Although not AEC-Q100 qualified, the ADC08832IMM is widely used in body-electronics and interior sensor hubs where its two channels read cabin temperature and illumination level sensors. The VSSOP-8 package fits tight PCB layouts and the serial interface keeps wiring simple to body controllers. Designers targeting AEC-Q100 should migrate to qualified TI parts such as ADS62P family members.
推薦
Medical Monitoring Equipment
Low-power medical monitoring designs such as handheld pulse oximeters, glucose meters, and portable ECG front ends can leverage the ADC08832IMM to digitize analog front-end outputs. Its 8-bit resolution is sufficient for indicator-style displays and the 3-wire interface minimizes MCU pin usage. Two channels allow simultaneous readout of primary and reference signals; medical designs should still implement IEC 60601 isolation barriers externally.
推薦
推薦產品摘要
工程參考資料，適用於 ADC08832IMM — 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 | ADC08831IMM/NOPB | ADC08832IMM/NOPB | ADC08832IWM/NOPB | ADC08831IMX | AD7992BRMZ-1 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Package | 8-VSSOP (DGK) | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-MSOP - same footprint family |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits | 12 bits (+50%) |
| Input Channels | 2 (multiplexed) | 1 (single-channel) | 2 (multiplexed) | 2 (multiplexed) | 1 (single-channel) | 2 (multiplexed) |
| Supply Voltage | 4.5 V to 6.3 V | 4.5 V to 6.3 V | 4.5 V to 6.3 V | 4.5 V to 6.3 V | 4.5 V to 6.3 V | 2.7 V to 5.5 V |
| Data Interface | 3-Wire Serial (SPI-like) | 3-Wire Serial | 3-Wire Serial | 3-Wire Serial | 3-Wire Serial | I2C |
| RoHS Compliance | Compliant (NOPB variant) | Compliant (/NOPB) | Compliant | Compliant (/NOPB) | Compliant | Compliant |
| Unit Price (qty 1) | $2.18 | $2.05 | $2.30 | $2.55 | $2.00 | $3.95 |
主要差異化特點
- Internal 2-channel multiplexer in compact VSSOP-8 (對比ADC08831IMM/NOPB)
- Higher resolution in same 8-pin MSOP footprint (對比AD7992BRMZ-1)
- Drop-in pin compatibility with legacy ADC0831/2 designs (對比ADC0831CCWM)
設計說明
Place a 0.1 uF ceramic bypass capacitor as close as possible to the VCC pin (pin 1) to filter high-frequency noise that can otherwise couple into the analog sampling window. For long VCC traces, add a 10 uF bulk capacitor at the regulator output. Keep analog input traces short and routed away from the CLK and DOUT digital lines to minimize digital-to-analog crosstalk on the ADC08832IMM.
Run CLK at or below the 2 MHz maximum recommended in the datasheet to guarantee 4 us conversion time. Series-terminate CLK with a 33-100 ohm resistor near the source if the trace exceeds 5 cm to suppress reflections. Account for tDO and tDOH timing margins from the datasheet when selecting an MCU CLK phase and GPIO drive strength to avoid data corruption on the DOUT line.
Do not drive any analog input above VCC or below GND - the datasheet does not specify input protection - clamp with Schottky diodes if overshoot is possible. When switching between CH0 and CH1, allow at least one full conversion cycle for the internal track-and-hold to settle before clocking out results. Verify CS toggle timing: CS must go high to reset the conversion state machine between cycles per the TI datasheet.
The ADC08832IMM dissipates approximately 8.5 mW typical and 50 mW maximum - thermal management is not a concern in 8-VSSOP. However, note that sustained operation at maximum VCC (6.3 V) and maximum clock rate can elevate die temperature; in sealed enclosures derate VCC to 5.5 V or CLK to 1.5 MHz to keep self-heating within the -40 C to +85 C operating envelope.
合規資訊
RoHS compliance applies to the /NOPB variant per TI product page. Base ADC08832IMM may carry non-RoHS finish - confirm ordering code with distributor. AEC-Q100 qualification not stated in datasheet; choose qualified TI ADS62P parts for automotive.
