MAX181BCQH-D - 12-Bit 100ksps 6-Channel ADC | Analog Devices
MPN: MAX181BCQH-D ✗ Cuối đờiMAX181BCQH-D Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MAX181BCQH-D — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX181BCQH-D (cùng hình factor và footprint) — khác nhau ở ADC Architecture, Number of Input Channels, Package Code, RoHS Status, Terminal Form.
MAX181AEQH+D
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX181CEQH+D
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX180ACQH+D
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX180ACQH+TD
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX133CQH+D
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX181BCQH+D
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX181BCQH-D Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bit |
| Tỷ lệ lấy mẫu | 100 ksps |
| Number of Input Channels | 6 |
| ADC Architecture | Successive Approximation (SAR) |
| Input Configuration | 6 single-ended / pseudo-differential |
| Data Interface | Parallel |
| Số lượng chân | 44 |
| Hộp | 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 |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Shipping Format | Tape and Reel (suffix -D) |
Cấu hình chân MAX181BCQH-D
| Chân 1 | CH0 — Analog input channel 0 |
| Chân 2 | CH1 — Analog input channel 1 |
| Chân 3 | CH2 — Analog input channel 2 |
| Chân 4 | CH3 — Analog input channel 3 |
| Chân 5 | CH4 — Analog input channel 4 |
| Chân 6 | CH5 — Analog input channel 5 |
| Chân 7 | AGND — Analog ground |
| Chân 8 | REF — Reference voltage input/output |
| Chân 9 | REFADJ — Reference adjustment |
| Chân 10 | VDD — +5V analog supply |
| Chân 11 | VSS — -5V analog supply (or AGND for unipolar) |
| Chân 12 | AIN — Alternate analog input / common |
| Chân 13 | DB0 — Data bit 0 (LSB) |
| Chân 14 | DB1 — Data bit 1 |
| Chân 15 | DB2 — Data bit 2 |
| Chân 16 | DB3 — Data bit 3 |
| Chân 17 | DB4 — Data bit 4 |
| Chân 18 | DB5 — Data bit 5 |
| Chân 19 | DB6 — Data bit 6 |
| Chân 20 | DB7 — Data bit 7 |
| Chân 21 | DB8 — Data bit 8 |
| Chân 22 | DB9 — Data bit 9 |
| Chân 23 | DB10 — Data bit 10 |
| Chân 24 | DB11 — Data bit 11 (MSB) |
| Chân 25 | INT — Conversion-interrupt output |
| Chân 26 | RD — Read strobe (active low) |
| Chân 27 | WR — Write / convert start (active low) |
| Chân 28 | CS — Chip select (active low) |
| Chân 29 | CLK — External clock input |
| Chân 30 | MODE — Mode select / channel register write |
| Chân 31 | A0 — Address / channel-select bit 0 |
| Chân 32 | A1 — Address / channel-select bit 1 |
| Chân 33 | A2 — Address / channel-select bit 2 |
| Chân 34 | DGND — Digital ground |
| Chân 35 | DVDD — +5V digital supply |
| Chân 36 | NC — Not connected (per datasheet) |
| Chân 37 | NC — Not connected (per datasheet) |
| Chân 38 | NC — Not connected (per datasheet) |
| Chân 39 | NC — Not connected (per datasheet) |
| Chân 40 | NC — Not connected (per datasheet) |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
MAX181BCQH-D phù hợp cho 7 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX181BCQH-D — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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) |
Bảo phân biệt quan trọng
- B-grade speed/accuracy within MAX181 family (vsMAX181AEQH+D)
- Tape-and-reel factory pack (vsMAX181BCQH+D)
- MAX181 family heritage with mature SAR architecture (vsMAX133CQH+D)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
