MAX11627EEE/V+CLS - 12-Bit 300ksps SAR ADC | Maxim Integrated
MPN： MAX11627EEE/V+CLS ✓ 啟用中MAX11627EEE/V+CLS 概覽
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.
直接替換替代品，適用於 MAX11627EEE/V+CLS — 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： MAX11627EEE/V+CLS （相同外形與佔位） — 差異在於 Package, Resolution.
MAX11627EEE+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX11626EEE+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX11628EEE+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX11629EEE+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX1156AEUP+T
✅ 直接替換聯絡詢價
查看資料表 →MAX11627EEE/V+CLS 最大額定值與電氣特性
| 解析度 | 12 bit |
| Number of Channels | 4 input |
| 取樣率 | 300 ksps |
| ADC Architecture | Successive Approximation (SAR) |
| Input Type | Single-ended, pseudo-differential (software mux) |
| 輸入電壓範圍 | 0 V to VREF (or external 1 V to VDD reference) |
| Internal Reference | 2.5 V |
| External Reference Range | 1 V to VDD |
| 介面 | SPI / QSPI / MICROWIRE-compatible, 10 MHz max |
| FIFO Depth | 16 entries |
| 封裝 | 16-pin QSOP |
| Special Features | FIFO, internal averaging, scan mode, internal clock, automotive CLS suffix |
MAX11627EEE/V+CLS 腳位配置
| 腳位 1 | AIN0 — Analog input channel 0 |
| 腳位 2 | AIN1 — Analog input channel 1 |
| 腳位 3 | AIN2 — Analog input channel 2 |
| 腳位 4 | AIN3 — Analog input channel 3 |
| 腳位 5 | REF — Reference voltage input/output (2.5V internal) |
| 腳位 6 | VDD — Positive supply voltage |
| 腳位 7 | GND — Ground |
| 腳位 8 | CNVST — Conversion start input |
| 腳位 9 | CS — Chip select (active low) |
| 腳位 10 | SCLK — Serial clock input |
| 腳位 11 | DIN — Serial data input |
| 腳位 12 | DOUT — Serial data output |
| 腳位 13 | NC — Not connected (per datasheet) |
| 腳位 14 | NC — Not connected (per datasheet) |
| 腳位 15 | NC — Not connected (per datasheet) |
| 腳位 16 | NC — Not connected (per datasheet) |
典型應用
MAX11627EEE/V+CLS 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 MAX11627EEE/V+CLS — 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 | 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 |
主要差異化特點
- Automotive /V+CLS suffix with customer-lot screening (對比MAX11627EEE+)
- 4 channels with 2.5V reference vs 4 channels with 4.096V reference (對比MAX11626EEE+)
- 4 channels vs 8/12 channels in same package (對比MAX11628EEE+ / MAX11629EEE+)
設計說明
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.
合規資訊
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.
