MAX11627EEE/V+CLS - 12-Bit 300ksps SAR ADC | Maxim Integrated
MPN: MAX11627EEE/V+CLS ✓ Hoạt độngMAX11627EEE/V+CLS Tóm tắt
A successive-approximation register (SAR) ADC is a converter architecture that performs one bit-trial per clock cycle using an internal binary-weighted capacitor DAC and a comparator, trading absolute speed for low power consumption and deterministic latency. The MAX11627 belongs to the wider MAX11626-MAX11629 ADC family - all 4-/8-/12-/16-channel low-cost SAR converters with FIFO and on-chip reference - which sit inside the Maxim precision-data-converter portfolio alongside higher-throughput pipeline ADCs and sigma-delta converters. SAR parts are commonly chosen for multiplexed multi-channel sensor acquisition where the channel-to-channel latency must remain deterministic for control-loop stability.
Key parametric features include ±1 LSB INL and ±1 LSB DNL with no missing codes over temperature, an internal 2.5V reference (also supports an external 1V to VDD reference), a 16-entry FIFO with scan-mode and internal averaging, an internal conversion clock, and a 4-channel analog input mux. The 16-pin QSOP package is the same physical footprint used across the MAX11626/MAX11627/MAX11628/MAX11629 family, allowing direct PCB migration between channel counts within the family.
The architecture is a classic charge-redistribution SAR with a sample-and-hold front end and a 12-bit resolution core. The internal FIFO offloads 16 conversion results, enabling burst-mode acquisition without continuous processor intervention and reducing SPI bus traffic for power-constrained MCUs.
Typical applications include automotive sensor acquisition (battery monitoring, current sensing, position feedback), industrial process control loops, multi-channel data loggers, portable instrumentation, and factory-automation front-ends. The +CLS automotive suffix makes this specific variant preferred for safety-critical or harsh-environment designs where customer-specific lot traceability is contractually required.
A key design consideration is that the FIFO depth and scan-mode registers must be configured via the SPI before conversion start; misprogramming the scan-mode register is the most common cause of missing-channel errors in production. Inputs AIN0-AIN3 are software-muxed; unused analog inputs should be tied to mid-supply to minimize crosstalk into the active channel.
This page synthesizes distributor pricing, parametric proximity analysis against same-family drop-in parts, and practical SPI configuration notes that are not consolidated in any single manufacturer document.
Bộ thay thế dễ dàng lắp đặt cho MAX11627EEE/V+CLS — 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 MAX11627EEE/V+CLS (cùng hình factor và footprint) — khác nhau ở Package, Resolution.
MAX11627EEE+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11626EEE+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11628EEE+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11629EEE+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1156AEUP+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX11627EEE/V+CLS Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bit |
| Number of Channels | 4 input |
| Tỷ lệ lấy mẫu | 300 ksps |
| ADC Architecture | Successive Approximation (SAR) |
| Input Type | Single-ended, pseudo-differential (software mux) |
| Phạm vi điện áp đầu vào | 0 V to VREF (or external 1 V to VDD reference) |
| Internal Reference | 2.5 V |
| External Reference Range | 1 V to VDD |
| Giao diện | SPI / QSPI / MICROWIRE-compatible, 10 MHz max |
| FIFO Depth | 16 entries |
| Hộp | 16-pin QSOP |
| Special Features | FIFO, internal averaging, scan mode, internal clock, automotive CLS suffix |
Cấu hình chân MAX11627EEE/V+CLS
| Chân 1 | AIN0 — Analog input channel 0 |
| Chân 2 | AIN1 — Analog input channel 1 |
| Chân 3 | AIN2 — Analog input channel 2 |
| Chân 4 | AIN3 — Analog input channel 3 |
| Chân 5 | REF — Reference voltage input/output (2.5V internal) |
| Chân 6 | VDD — Positive supply voltage |
| Chân 7 | GND — Ground |
| Chân 8 | CNVST — Conversion start input |
| Chân 9 | CS — Chip select (active low) |
| Chân 10 | SCLK — Serial clock input |
| Chân 11 | DIN — Serial data input |
| Chân 12 | DOUT — Serial data output |
| Chân 13 | NC — Not connected (per datasheet) |
| Chân 14 | NC — Not connected (per datasheet) |
| Chân 15 | NC — Not connected (per datasheet) |
| Chân 16 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
MAX11627EEE/V+CLS phù hợp cho 6 Áp dụngs: Automotive Sensor Acquisition, Industrial Process Control Loops, Multi-Channel Data Loggers, Portable Test & Measurement, Battery Management Systems (BMS), Factory Automation Front-Ends.
Automotive Sensor Acquisition
The MAX11627EEE/V+CLS is purpose-built for automotive multi-channel sensor acquisition where the /V+CLS suffix provides AEC-Q lot screening and customer-specific traceability. Its 12-bit 300ksps SAR core digitizes analog signals from 4-wire sensors such as thermistors, pressure transducers, and battery-pack current shunts. The 16-entry FIFO allows the host MCU to enter low-power sleep between conversion bursts, reducing average current draw in always-on automotive ECUs. The 2.5V internal reference yields a 610uV LSB, sufficient for 1% accurate temperature and pressure measurements over -40C to +125C ambient. Automotive designers should note the /V suffix denotes the AEC-Q screening flow.
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Industrial Process Control Loops
The MAX11627EEE/V+CLS fits industrial process control applications requiring deterministic latency and multi-channel acquisition. The SAR architecture provides single-cycle conversion with no pipeline delay, which is critical for closed-loop PID control where ADC group delay directly impacts control bandwidth. With 4 input channels, the part handles 4-20mA current-loop receivers, RTD bridges, and potentiometer position feedback in a single package. The 300ksps throughput supports oversampling for noise averaging in electrically-noisy factory environments. The QSOP-16 footprint is footprint-compatible across the MAX11626/27/28/29 family, allowing channel-count migration without PCB redesign.
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Multi-Channel Data Loggers
Battery-powered multi-channel data loggers benefit from the MAX11627EEE/V+CLS combination of low power consumption, FIFO buffer, and SAR architecture. The 16-entry FIFO offloads conversion results from the host MCU, allowing the processor to enter deep-sleep between acquisition windows and extending battery life in field-deployed loggers. The 4-channel input mux supports temperature, humidity, pressure, and voltage monitoring in environmental data loggers. Scan mode and internal averaging further reduce the per-channel noise floor without consuming host CPU cycles. Compared to sigma-delta ADCs of similar resolution, the SAR's 300ksps throughput supports higher-bandwidth vibration and acoustic monitoring.
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Portable Test & Measurement
Handheld test and measurement instruments rely on the MAX11627EEE/V+CLS for compact 4-channel acquisition in a small QSOP-16 footprint. The 10MHz SPI interface reads conversion results at full 300ksps throughput, enabling digital multimeters, oscilloscope front-ends, and field service tools. The internal 2.5V reference eliminates an external reference IC, saving PCB area and reducing BOM cost. The FIFO's scan mode sequences 4 input channels automatically, removing the host MCU's per-channel chip-select toggling overhead. For 4-wire Kelvin resistance measurements, the 4 channels can be paired for stimulus and sense paths.
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Battery Management Systems (BMS)
Battery management systems use the MAX11627EEE/V+CLS to digitize per-cell voltage, pack current, and temperature signals in lithium-ion battery packs. The 4 input channels can monitor 4 battery cells or, when paired with an external mux, scan up to 16 cells via scan mode. The 12-bit resolution over a 0-5V input range yields a 1.22mV LSB, sufficient for state-of-charge (SOC) estimation in 4.2V Li-ion cells. The automotive /V suffix makes the part suitable for EV battery management where AEC-Q screening is contractually required. Compared to dedicated battery monitor ICs, the MAX11627 offers a more general-purpose front-end with SPI connectivity.
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Factory Automation Front-Ends
The MAX11627EEE/V+CLS is well-suited to factory automation front-end modules that digitize analog signals from proximity sensors, photoelectric switches, and 0-10V analog field devices. The 4 single-ended input channels handle 4 field-device signals per chip, and multiple MAX11627 devices can share an SPI bus via individual CS lines. The SAR architecture's deterministic latency simplifies real-time control firmware, since the conversion result is available a fixed number of clock cycles after CNVST. The QSOP-16 package is small enough for DIN-rail-mounted PLC analog input cards with high channel density.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX11627EEE/V+CLS — 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 | MAX11627EEE+ | MAX11626EEE+ | MAX11628EEE+ | MAX11629EEE+ |
|---|---|---|---|---|---|
| Package | 16-pin QSOP | 16-pin QSOP (same) | 16-pin QSOP (same) | 16-pin QSOP (same) | 16-pin QSOP (same) |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 300 ksps | 300 ksps | 300 ksps | 300 ksps | 300 ksps |
| Number of Channels | 4 | 4 | 4 | 8 | 12 |
| Internal Reference | 2.5 V | 2.5 V | 4.096 V | 2.5 V | 2.5 V |
| FIFO Depth | 16 entries | 16 entries | 16 entries | 16 entries | 16 entries |
| Interface | SPI/QSPI/MICROWIRE, 10 MHz | SPI/QSPI/MICROWIRE, 10 MHz | SPI/QSPI/MICROWIRE, 10 MHz | SPI/QSPI/MICROWIRE, 10 MHz | SPI/QSPI/MICROWIRE, 10 MHz |
| Automotive Grade / CLS | Yes (AEC-Q, CLS lot screening) | No | No | No | No |
Bảo phân biệt quan trọng
- Automotive /V+CLS suffix with customer-lot screening (vsMAX11627EEE+)
- 4 channels with 2.5V reference vs 4 channels with 4.096V reference (vsMAX11626EEE+)
- 4 channels vs 8/12 channels in same package (vsMAX11628EEE+ / MAX11629EEE+)
Ghi chú thiết kế
The MAX11627 scan-mode register must be programmed via SPI before the first conversion start, otherwise only channel 0 is acquired. According to the MAX11626-MAX11629 datasheet, misprogramming the scan-mode register is the most common cause of missing-channel errors in production. Engineers should add a SPI register-write verification step in their firmware initialization sequence. Estimated: the SPI configuration adds 8-12 instruction cycles at 10 MHz SCLK.
Place the 0.1uF VDD decoupling capacitor within 5mm of the VDD pin, and add a 10uF bulk capacitor on the supply rail. The QSOP-16 thermal pad (if present in the EEE package) should be soldered to a copper pour connected to GND for thermal dissipation. The REF pin requires a 0.1uF + 10uF local bypass network to filter the internal reference buffer noise; insufficient REF bypassing increases effective noise floor by 1-2 LSBs at full throughput.
Route analog input traces (AIN0-AIN3) as a matched-length group, away from digital SPI traces (SCLK, DIN, DOUT, CS). Use a ground guard ring around the analog input pins to minimize digital crosstalk. According to Maxim's SAR-ADC layout guide, coupling of SCLK edges into the analog input can inject 1-2 mV of kickback noise that requires 50-100 ns settling time before the next conversion starts.
Thông tin tuân thủ
RoHS and REACH compliant per Maxim product page. /V suffix indicates AEC-Q100 screening for automotive applications. CLS suffix indicates customer-lot screening. Lead-free and halogen-free per QSOP-16 package materials declaration.
