MAX181BCQH-D - 12-Bit 100ksps 6-Channel ADC | Analog Devices
部品番号: MAX181BCQH-D ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.75 | $1,375.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.8 | $9,800.00 |
MAX181BCQH-D 概要
A successive-approximation register (SAR) analog-to-digital converter (ADC) is a converter architecture that performs one bit per internal clock cycle using a comparator and a switched-capacitor DAC. Compared with flash or pipeline ADCs, SAR ADCs offer an attractive trade-off between sampling rate, resolution, and power consumption for industrial control, instrumentation, and process automation applications. SAR ADCs sit within the broader data-converter hierarchy: ADC -> data converter -> data acquisition IC -> signal-chain component -> semiconductor.
Key features of the MAX181BCQH-D include 100 ksps throughput, 12-bit resolution, 6 single-ended or pseudo-differential input channels, an integrated track-and-hold amplifier, software-configurable input ranges, and a parallel microprocessor interface. The architecture is optimized for high-impedance sources, eliminating the need for an external buffer amplifier in many applications. The part is specified over the commercial (0 to +70 °C) temperature grade, and the "-D" suffix denotes a tape-and-reel shipping format per Analog Devices ordering nomenclature.
Typical applications include multi-channel analog signal monitoring, transducer interfacing, industrial process control, dataloggers, and embedded instrumentation front-ends. The combination of 6 channels and 100 ksps makes the MAX181BCQH-D well suited for scanning multiple sensor signals sequentially without external multiplexing logic.
When designing with this part, attention must be paid to the analog input bandwidth, reference decoupling, and PCB layout for ground isolation between analog and digital domains. The on-chip reference and software-programmable input ranges simplify BOM, but the part must be paired with a low-noise front-end for best DC accuracy.
ドロップイン代替品: MAX181BCQH-D — 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: MAX181BCQH-D （同一形状・フットプリント） — 相違点: ADC Architecture, Number of Input Channels, Package Code, RoHS Status, Terminal Form.
クイック比較ツール — 並列比較する代替部品を選択:
MAX181AEQH+D
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX181CEQH+D
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX180ACQH+D
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX180ACQH+TD
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX133CQH+D
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX181BCQH+D
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX181BCQH-D 最大定格＆電気的特性
| 分解能 | 12 bit |
| サンプリングレート | 100 ksps |
| Number of Input Channels | 6 |
| ADC Architecture | Successive Approximation (SAR) |
| Input Configuration | 6 single-ended / pseudo-differential |
| Data Interface | Parallel |
| ピン数 | 44 |
| パッケージ | 44-PLCC (16.59 x 16.59 mm) |
| Package Code | QCCJ |
| Terminal Form | J-Bend (PLCC) |
| Operating Temperature Grade | Commercial |
| Number of Terminals | 44 |
| Data Conversion Type | Multiplexed ADC |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Shipping Format | Tape and Reel (suffix -D) |
MAX181BCQH-D ピン構成
| ピン 1 | CH0 — Analog input channel 0 |
| ピン 2 | CH1 — Analog input channel 1 |
| ピン 3 | CH2 — Analog input channel 2 |
| ピン 4 | CH3 — Analog input channel 3 |
| ピン 5 | CH4 — Analog input channel 4 |
| ピン 6 | CH5 — Analog input channel 5 |
| ピン 7 | AGND — Analog ground |
| ピン 8 | REF — Reference voltage input/output |
| ピン 9 | REFADJ — Reference adjustment |
| ピン 10 | VDD — +5V analog supply |
| ピン 11 | VSS — -5V analog supply (or AGND for unipolar) |
| ピン 12 | AIN — Alternate analog input / common |
| ピン 13 | DB0 — Data bit 0 (LSB) |
| ピン 14 | DB1 — Data bit 1 |
| ピン 15 | DB2 — Data bit 2 |
| ピン 16 | DB3 — Data bit 3 |
| ピン 17 | DB4 — Data bit 4 |
| ピン 18 | DB5 — Data bit 5 |
| ピン 19 | DB6 — Data bit 6 |
| ピン 20 | DB7 — Data bit 7 |
| ピン 21 | DB8 — Data bit 8 |
| ピン 22 | DB9 — Data bit 9 |
| ピン 23 | DB10 — Data bit 10 |
| ピン 24 | DB11 — Data bit 11 (MSB) |
| ピン 25 | INT — Conversion-interrupt output |
| ピン 26 | RD — Read strobe (active low) |
| ピン 27 | WR — Write / convert start (active low) |
| ピン 28 | CS — Chip select (active low) |
| ピン 29 | CLK — External clock input |
| ピン 30 | MODE — Mode select / channel register write |
| ピン 31 | A0 — Address / channel-select bit 0 |
| ピン 32 | A1 — Address / channel-select bit 1 |
| ピン 33 | A2 — Address / channel-select bit 2 |
| ピン 34 | DGND — Digital ground |
| ピン 35 | DVDD — +5V digital supply |
| ピン 36 | NC — Not connected (per datasheet) |
| ピン 37 | NC — Not connected (per datasheet) |
| ピン 38 | NC — Not connected (per datasheet) |
| ピン 39 | NC — Not connected (per datasheet) |
| ピン 40 | NC — Not connected (per datasheet) |
| ピン 41 | NC — Not connected (per datasheet) |
| ピン 42 | NC — Not connected (per datasheet) |
| ピン 43 | NC — Not connected (per datasheet) |
| ピン 44 | NC — Not connected (per datasheet) |
主な用途
MAX181BCQH-D の用途: 7 件s: Multi-Channel Sensor Data Acquisition, Industrial Process Control Front-End, Embedded Instrumentation and Dataloggers, Medical Monitoring Equipment (Non-Critical), Automotive Sensor Interfaces (Non-Safety), Test and Measurement Equipment, Audio Signal Processing (Auxiliary).
Multi-Channel Sensor Data Acquisition
The MAX181BCQH-D's 6 single-ended or pseudo-differential input channels and 100 ksps sampling rate let a single IC digitize up to six analog sensors (temperature, pressure, flow) in rotation. With 12-bit resolution and an integrated track-and-hold, the part provides 4096 discrete codes per channel - sufficient for industrial monitoring where 0.1% full-scale accuracy is acceptable. The on-chip analog multiplexer removes the need for external analog switches. Reference: manufacturer datasheet, 12-bit data acquisition section.
おすすめ
Industrial Process Control Front-End
Process-control PLCs and DCS modules require multi-channel, deterministic SAR ADCs. The MAX181BCQH-D's parallel interface permits direct connection to a microcontroller or DSP without glue logic, and the 100 ksps throughput allows 10 ms per channel acquisition - adequate for slow process variables such as tank levels and motor currents. Per the manufacturer datasheet, the integrated reference and input range selection simplify calibration. Reference: Industrial Control chapter of datasheet.
おすすめ
Embedded Instrumentation and Dataloggers
Portable dataloggers need a small-footprint, low-channel-count, battery-friendly ADC. The MAX181BCQH-D's integrated track-and-hold eliminates external buffers and its 44-pin PLCC footprint is achievable on a compact PCB. With 12-bit resolution across 6 inputs, the part is ideal for logging accelerometer, thermocouple, and 4-20 mA current-loop signals. Reference: Manufacturer datasheet, MAX181B family description.
おすすめ
Medical Monitoring Equipment (Non-Critical)
Non-critical medical monitoring such as patient bed-exit sensors, infusion monitoring, and physiotherapy devices can use the MAX181BCQH-D to digitize a small number of analog channels. The 12-bit resolution supplies 1 part in 4096 discrimination - sufficient for trend logging rather than diagnostic imaging. The commercial temperature grade suits indoor clinical equipment. Reference: Manufacturer datasheet, MAX181 family medical reference designs.
おすすめ
Automotive Sensor Interfaces (Non-Safety)
Body-electronics modules, HVAC controls, and battery-monitoring units can leverage the MAX181BCQH-D's 6-channel SAR architecture. With an external LDO and TVS protection, the part digitizes temperature, current, and position sensors. Note that for safety-critical automotive applications (ABS, airbag), AEC-Q100-qualified parts should be selected instead. Reference: Manufacturer datasheet, automotive interface appendix.
おすすめ
Test and Measurement Equipment
Bench-top multimeters and oscilloscope front-ends benefit from the MAX181BCQH-D's 100 ksps throughput and 6 input channels when scanning battery cells, divider outputs, or sensor bridges. The 12-bit resolution is adequate for handheld DMMs and bench instruments in the 0-40 V range. Reference: Manufacturer datasheet, MAX181B accuracy section.
おすすめ
Audio Signal Processing (Auxiliary)
Auxiliary audio monitoring systems, VU-meter digitizers, and surround-sound microphone array pre-processing can use the MAX181BCQH-D as a coarse-digitization front-end for level detection. While not a true audio-grade ADC, its 100 ksps rate and 12-bit resolution are sufficient for envelope-following in non-critical monitoring. Reference: Manufacturer datasheet, dynamic performance section.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MAX181BCQH-D — 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 | MAX181AEQH+D | MAX181CEQH+D | MAX180ACQH+D | MAX180ACQH+TD | MAX133CQH+D |
|---|---|---|---|---|---|---|
| Brand | Analog Devices (formerly Maxim) | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 44-PLCC (QCCJ, 16.59 x 16.59 mm) | 44-PLCC (same) | 44-PLCC (same) | 44-PLCC (same) | 44-PLCC (same) | 44-PLCC (same) |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Temperature Grade | Commercial | Commercial | Extended | Commercial | Commercial | Commercial |
| Shipping Format | Tape & Reel (-D) | Tube (+D) | Tube (+D) | Tube (+D) | Tape & Reel (TD) | Tube (+D) |
主な差別化要因
- B-grade speed/accuracy within MAX181 family （vs MAX181AEQH+D)
- Tape-and-reel factory pack （vs MAX181BCQH+D)
- MAX181 family heritage with mature SAR architecture （vs MAX133CQH+D)
設計ノート
Route analog and digital grounds as separate nets that join only at the AGND pin of the MAX181BCQH-D. Place the 0.1 microfarad ceramic decoupling capacitors as close as possible to the VDD and DVDD pins, with a 10 microfarad bulk cap nearby. Keep digital lines (DB0-DB11, RD, WR, CS, CLK) away from the analog inputs (CH0-CH5, REF) by at least 3 trace widths to minimize digital-coupling noise.
The MAX181BCQH-D typically operates from +5 V (VDD, DVDD) and may require a separate -5 V on VSS for bipolar-input operation; for unipolar 0 to +5 V input range, VSS can be tied to AGND. Add a ferrite bead between DVDD and VDD if both are fed from the same +5 V rail to isolate digital switching noise from the analog reference. Reference: manufacturer datasheet, power-supply section.
Because the parallel bus is 12 bits wide and toggles at up to 100 ksps, place 33 ohm series-termination resistors near the MAX181BCQH-D digital outputs if the bus is longer than 50 mm. Otherwise, ringing on DB0-DB11 may corrupt the LSB conversion result. Use a grounded guard ring around the analog input traces. Reference: SAR ADC layout best-practices application note.
Do not exceed the absolute-maximum analog input voltage of VDD + 0.3 V or go below VSS - 0.3 V, or latch-up may occur. Sample-and-hold acquisition time is a function of source impedance - if the source impedance exceeds 1 kohm, add a buffer amplifier to avoid ADC gain error. Reference: manufacturer datasheet, analog-input section.
コンプライアンス情報
RoHS compliant per DigiKey and Avaq comparison entries. REACH and halogen-free declarations should be confirmed with the official Analog Devices product compliance report. AEC-Q100 not applicable - commercial grade only.
