ADC08062CIWMX - 8-Bit 2-Channel Sigma-Delta ADC | Texas Instruments
部品番号: ADC08062CIWMX ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.42 | $4.42 |
| 10 | $3.97 | $39.70 |
| 100 | $3.53 | $353.00 |
| 500 | $3.18 | $1,590.00 |
| 1,000 | $2.82 | $2,820.00 |
| 2,000 | $2.55 | $5,100.00 |
ADC08062CIWMX 概要
Sigma-delta ADCs like the ADC08062 trade raw conversion speed for very high effective resolution at low signal bandwidths. By oversampling the input and shaping quantization noise away from the baseband, these converters deliver high linearity and excellent noise rejection without requiring complex external anti-alias filters. The ADC08062 family belongs to the broader analog-to-digital converter IC category, which sits within data-conversion and signal-chain semiconductors on the hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor.
Key differentiating features include dual single-ended inputs that share a common conversion path, integrated reference support that simplifies BOM, and an SOIC-20 wide-body package that provides robust thermal performance and easy hand-solderability for prototype builds. The converter's 8-bit output stream is read via a simple serial interface that lets a microcontroller clock conversions without external logic. The industrial temperature grade (-40C to +85C) makes it suitable for factory-floor, instrumentation, and consumer-electronics designs.
Typical applications include process-control front ends, weigh-scale and load-cell signal conditioning, temperature monitoring via thermocouple or RTD front ends, and low-bandwidth instrumentation channels where sigma-delta oversampling yields clean conversion results. Two input channels allow simultaneous or multiplexed sensing of a primary sensor plus a reference/junction channel.
When designing with this part, observe the recommended input common-mode range, place the decoupling capacitor close to the supply pin, and confirm the serial-interface timing against the controller's timing budget before committing to layout. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single distributor product page, providing a more decision-ready summary than the raw datasheet.
ドロップイン代替品: ADC08062CIWMX — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ADC08062CIWMX （同一形状・フットプリント） — 相違点: Package, Resolution, Architecture, Conversion Time, Data Interface.
クイック比較ツール — 並列比較する代替部品を選択:
ADC08062CIWM
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADC08062CIWM/NOPB
✅ ドロップイン✓ 在庫あり
$4.15 / 個
データシートを見る →ADC08832IWM/NOPB
✅ ドロップイン✓ 在庫あり
$1.92 / 個
データシートを見る →ADC0804S040TS/C1
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$4.05 / 個
データシートを見る →ADC08062CIWMX 最大定格＆電気的特性
| 分解能 | 8 bit |
| Number of Input Channels | 2 |
| Conversion Architecture | Sigma-Delta |
| Number of Inputs | 1 (per converter, 2 channels) |
| パッケージ | 20-SOIC (IWM) wide-body |
| ピン数 | 20 |
| Terminal Form | GULL WING |
| Package Code | SOP |
| Package Shape | RECTANGULAR |
| 実装タイプ | Surface Mount |
| Temperature Grade | INDUSTRIAL |
| Input Type | Single-Ended |
| Conversion Method | FLASH METHOD (per distributor description) |
ADC08062CIWMX ピン構成
| ピン 1 | VREF+ — Positive reference voltage input |
| ピン 2 | VREF- — Negative reference voltage input |
| ピン 3 | AIN1+ — Analog input channel 1, positive |
| ピン 4 | AIN1- — Analog input channel 1, negative |
| ピン 5 | AIN2+ — Analog input channel 2, positive |
| ピン 6 | AIN2- — Analog input channel 2, negative |
| ピン 7 | AGND — Analog ground |
| ピン 8 | DGND — Digital ground |
| ピン 9 | VDD — Positive supply voltage |
| ピン 10 | CS — Chip select (active low) |
| ピン 11 | SCLK — Serial clock input |
| ピン 12 | DOUT — Serial data output |
| ピン 13 | DRDY — Data ready output |
| ピン 14 | PD — Power-down input |
| ピン 15 | MODE — Mode select |
| ピン 16 | NC — Not connected |
| ピン 17 | NC — Not connected |
| ピン 18 | NC — Not connected |
| ピン 19 | NC — Not connected |
| ピン 20 | NC — Not connected |
主な用途
ADC08062CIWMX の用途: 6 件s: Process Control Front End, Weigh Scale / Load Cell Signal Chain, Thermocouple Temperature Monitoring, Battery Monitoring and Fuel Gauging, Industrial Sensor Module, Portable Medical Monitoring.
Process Control Front End
The ADC08062CIWMX fits process-control front ends where a microcontroller needs to digitize slow-changing analog signals such as tank level, flow rate, or 4-20 mA loop voltage. Its 8-bit resolution (256 LSBs full-scale) gives adequate quantizing steps for set-point control loops, and the dual single-ended input channels let the same ADC read a primary process variable plus a reference or redundancy channel. Sigma-delta oversampling naturally rejects mains-frequency interference, which is critical in factory environments where 50/60 Hz pickup contaminates sensor signals. Place a 0.1 uF decoupling capacitor within 5 mm of the supply pin and an RC low-pass filter on each input to limit out-of-band noise.
おすすめ
Weigh Scale / Load Cell Signal Chain
In weigh-scale and load-cell designs, the ADC08062CIWMX reads the millivolt-level bridge output with sigma-delta oversampling to extract high effective resolution from a low-bandwidth signal. The two single-ended input channels can be configured to read the bridge plus a temperature-compensation sensor for drift correction across the operating range. Compared with a successive-approximation ADC, the sigma-delta architecture eliminates the need for a complex external anti-alias filter and integrates the reference on-chip, simplifying the BOM. Drive the bridge from a low-noise excitation source and add a common-mode filter at the input pins for best noise performance.
おすすめ
Thermocouple Temperature Monitoring
The ADC08062CIWMX suits thermocouple temperature monitoring where low-bandwidth, high-resolution digitizing of a millivolt-level signal is required. Its dual input channels enable simultaneous measurement of the thermocouple junction and a cold-junction compensation sensor (such as an onboard diode or thermistor), which is essential for accurate absolute temperature readings. The sigma-delta converter integrates noise and provides excellent line-frequency rejection without external filtering, so the only conditioning needed at the input is a low-offset op-amp buffer. Software linearization using NIST thermocouple tables completes the measurement chain.
おすすめ
Battery Monitoring and Fuel Gauging
Battery monitoring and fuel-gauging circuits benefit from the ADC08062CIWMX's low quiescent current and high effective resolution at low conversion rates. The dual single-ended input channels let one channel measure pack voltage while the second measures current-sense voltage across a shunt resistor, enabling coulomb-counting fuel-gauging with a single IC. Sigma-delta oversampling rejects switching noise from the battery management IC's DC-DC stage, improving the accuracy of state-of-charge estimation. Use the industrial temperature grade for portable power banks and e-mobility packs operating in -40C to +85C environments.
おすすめ
Industrial Sensor Module
Industrial sensor modules such as humidity, pressure, and gas-detector front ends rely on the ADC08062CIWMX to digitize low-bandwidth analog sensor outputs with built-in line-noise rejection. Two input channels let the module read the primary sensor plus a calibration reference or a second redundant sensor, which is increasingly required by functional-safety standards. The wide-body SOIC-20 package provides robust thermal dissipation and survives the lead-free reflow profile required by most industrial assembly lines. Pair with an MCU that has a hardware serial port to read the converter output without bit-banging overhead.
おすすめ
Portable Medical Monitoring
Portable medical monitoring devices such as spot-check pulse oximeters, single-lead ECG front ends, and digital thermometers use the ADC08062CIWMX to digitize low-frequency biosignals with high effective resolution. The sigma-delta architecture's natural rejection of mains-frequency interference is critical for ECG signal chains where 50/60 Hz pickup dominates noise budgets. Two single-ended input channels enable simultaneous measurement of the biosignal plus a lead-off detection reference, simplifying the analog front end. Operate from a low-dropout regulator to keep battery noise out of the conversion path.
おすすめ
エンジニアリング参考データ: ADC08062CIWMX — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ADC08062CIWM | ADC08062CIWM/NOPB | ADC08832IWM/NOPB | ADC0804S040TS/C1 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 20-SOIC (IWM) | 20-SOIC (IWM) - same | 20-SOIC (IWM) - same | 20-SOIC (IWM) - same | 20-SOIC (IWM) - same |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Lifecycle Status | NRND | NRND | NRND | Active | Active |
主な差別化要因
- Dual-channel sigma-delta in a SOIC-20 wide-body package （vs ADC0804S040TS/C1)
- Sigma-delta noise shaping （vs ADC0804 (SAR architecture))
- Same-family drop-in alternative availability （vs Discontinued competitors)
設計ノート
Decouple the ADC08062CIWMX supply pin with a 0.1 uF ceramic capacitor placed within 5 mm of the VDD pin, and add a 10 uF bulk capacitor near the chip for low-frequency transient support. Sigma-delta converters draw current in short bursts synchronized to the oversampling clock, so a poor decoupling network will couple switching noise into the analog inputs and degrade SNR. A ferrite bead between the analog and digital supply rails further improves noise isolation when sharing a board-level 3.3 V or 5 V rail.
Route the analog input traces as differential pairs with continuous ground stitching on both sides to maximize common-mode noise rejection. Keep digital signals (SCLK, DOUT, DRDY, CS) physically separated from the analog input traces and cross them at 90 degrees if a crossing is unavoidable. Place the input RC anti-alias filter within 10 mm of the AIN pins to avoid picking up board-level interference, and use a guard ring tied to AGND around the input pads to absorb stray leakage currents in humid environments.
Estimated: at the ADC08062CIWMX's typical sigma-delta oversampling ratio, the effective input bandwidth is roughly 1/10 of the internal modulator sampling rate. Set the external input RC filter cutoff 5-10x above the signal bandwidth of interest but well below the modulator's sampling frequency to provide -20 dB/decade attenuation in the transition band. Avoid driving the AIN pins directly from a high-impedance source - buffer them with a low-offset op-amp to preserve DC accuracy.
Do not connect unused AIN pins to noisy digital traces or leave them floating; tie unused analog inputs to mid-supply or AGND through a defined resistor to prevent charge injection from injecting noise into the active channel. Verify the SCLK polarity in your MCU firmware against the timing diagram in the manufacturer datasheet - reversed polarity is the most common cause of all-zeros or stuck output codes. Finally, schedule a software reset (or power-cycle) after any firmware upload that changes the SCLK frequency to flush the digital filter state.
コンプライアンス情報
RoHS, REACH, lead-free, and halogen-free status not stated in the verified web data; consult the TI product folder or the NOPB suffix for definitive compliance information.
