MAX116CAX - 12-Bit, 2x4-Ch Simultaneous-Sampling ADC | Maxim
MPN: MAX116CAX ✗ Cuối đờiMAX116CAX Tóm tắt
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes, and the simultaneous-sampling sub-category specifically uses one SAMPLE-and-hold per channel so that all channels are captured at the exact same instant. This is in contrast to multichannel ADCs that use a single shared SAMPLE-and-hold and sequentially scan channels - which introduces time skew between channels. Simultaneous-sampling ADCs sit hierarchically inside the data-converter IC family, which itself belongs to the broader mixed-signal / data acquisition (DAQ) IC category, ultimately under power management and signal-chain semiconductors.
Key features of the MAX116CAX include a 2 microsecond per-channel conversion time, 8 single-ended analog inputs organized as two 4-channel multiplexed banks, an industry-standard successive-approximation register (SAR) architecture, a 36-pin SSOP surface-mount package, and industrial (-40C to +85C) operating temperature range. The successive-approximation architecture provides deterministic latency and inherent robustness in noisy industrial environments compared to delta-sigma converters that require complex digital filtering.
The MAX116CAX uses an SAR core clocked from an external crystal or clock source, with an internal reference and channel-selection logic. Four matched track-and-hold blocks feed the SAR core via an internal analog multiplexer, allowing all four channels to be digitized in one conversion cycle with no inter-channel timing skew. This architecture is critical for phase-sensitive applications such as power-line monitoring, motor control, and multi-phase vibration analysis where the relative amplitude and phase between signals carries the engineering meaning.
Typical applications include three-phase power monitoring and metering, motor control current/voltage sensing, multi-axis inertial and vibration measurement, industrial process control multi-channel DAQ, and instrumentation requiring correlated multi-channel sampling. Engineers select this part when phase coherence between channels matters more than raw single-channel speed.
Design considerations include providing adequate bypass capacitance on AVDD/DVDDDVDDVDD rails, ensuring the analog inputs remain within the common-mode range of the track-and-hold amplifiers, and respecting the aperture-time matching spec between channels. The 36-pin SSOP package has moderate thermal resistance suitable for industrial environments but should be paired with a ground plane for digital-noise isolation.
This page synthesizes distributor pricing, parametric comparison, drop-in alternatives, and practical design notes for the MAX116CAX that go beyond the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho MAX116CAX — 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 MAX116CAX (cùng hình factor và footprint) — khác nhau ở Package, Resolution, Number of Channels, Sampling Rate, Operating Temperature.
MAX1156AEUP+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1154AEUE+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1147BEUP+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1145BEAP+
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX116CAX Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bit |
| Number of Channels | 2 x 4 (eight single-ended) |
| Sampling Architecture | Simultaneous-sampling SAR with 4 T/H amplifiers |
| Conversion Time per Channel | 2 us |
| Throughput (1 channel active) | 390 ksps |
| Throughput (2 channels active) | 218 ksps |
| Throughput (3 channels active) | 152 ksps |
| Throughput (4 channels active) | 116 ksps |
| Analog Input Type | Single-ended, 2x 4-channel multiplexed banks |
| Hộp | 36-pin SSOP (CAX) |
| Terminal Form | Gull wing |
| Package Shape | Rectangular |
| Temperature Grade | Industrial |
| Architecture | Successive Approximation Register (SAR) |
Cấu hình chân MAX116CAX
| Chân 1 | CH0A — Analog input channel 0, bank A |
| Chân 2 | CH1A — Analog input channel 1, bank A |
| Chân 3 | CH2A — Analog input channel 2, bank A |
| Chân 4 | CH3A — Analog input channel 3, bank A |
| Chân 5 | AGND — Analog ground |
| Chân 6 | AVDD — Analog supply voltage |
| Chân 7 | REF — Reference voltage input/output |
| Chân 8 | REFGND — Reference ground |
| Chân 9 | CH0B — Analog input channel 0, bank B |
| Chân 10 | CH1B — Analog input channel 1, bank B |
| Chân 11 | CH2B — Analog input channel 2, bank B |
| Chân 12 | CH3B — Analog input channel 3, bank B |
| Chân 13 | T/H OUT1 — Track-and-hold amplifier 1 output |
| Chân 14 | T/H OUT2 — Track-and-hold amplifier 2 output |
| Chân 15 | T/H OUT3 — Track-and-hold amplifier 3 output |
| Chân 16 | T/H OUT4 — Track-and-hold amplifier 4 output |
| Chân 17 | MUX A0 — Multiplexer bank A address 0 |
| Chân 18 | MUX A1 — Multiplexer bank A address 1 |
| Chân 19 | MUX B0 — Multiplexer bank B address 0 |
| Chân 20 | MUX B1 — Multiplexer bank B address 1 |
| Chân 21 | CONVST — Conversion start input |
| Chân 22 | EOC — End-of-conversion output |
| Chân 23 | DOUT — Serial data output |
| Chân 24 | SCLK — Serial clock input |
| Chân 25 | CS — Chip-select input |
| Chân 26 | DIN — Serial data input (configuration) |
| Chân 27 | CLK — External clock input |
| Chân 28 | CLKOUT — Clock output (crystal oscillator) |
| Chân 29 | XTAL1 — Crystal oscillator input |
| Chân 30 | XTAL2 — Crystal oscillator output |
| Chân 31 | DVDD — Digital supply voltage |
| Chân 32 | DGND — Digital ground |
| Chân 33 | PD — Power-down input |
| Chân 34 | MODE — Operating mode select |
| Chân 35 | NC — Not connected (per datasheet) |
| Chân 36 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
MAX116CAX phù hợp cho 6 Áp dụngs: Three-Phase Power Monitoring and Metering, Multi-Phase Motor Control Sensing, Multi-Axis Vibration and Inertial Measurement, Industrial Process Control Multi-Channel DAQ, Power-Line Disturbance Recorders, Medical Multi-Parameter Patient Monitoring.
Three-Phase Power Monitoring and Metering
The MAX116CAX fits three-phase power-quality monitoring and Class 0.5 energy-metering applications because its four simultaneous-sampling track-and-hold amplifiers capture phase-A, phase-B, phase-C, and neutral currents at the exact same instant. This eliminates the inter-channel timing skew that would otherwise corrupt real-power, apparent-power, and power-factor calculations. With 12-bit resolution, 116 ksps aggregate throughput at four channels, and 2 us per-channel conversion time, the part meets the sampling requirements of IEC 61000-4-30 power-quality instruments and ANSI C12.20 Class 0.5 revenue-grade meters. The 36-pin SSOP package keeps the BOM small for compact panel-meter form factors.
Được đề xuất
Multi-Phase Motor Control Sensing
The MAX116CAX suits three-phase motor-drive current and voltage sensing where phase coherence between the three stator windings is essential for field-oriented control. Each track-and-hold block on the MAX116CAX samples its assigned phase at the same instant, so the firmware receives simultaneous phase currents and voltages to compute the d/q transform without time-skew artifacts. The 390 ksps single-channel mode supports high-speed current-loop sampling, while 116 ksps in 4-channel mode supports combined voltage and current sensing. Industrial temperature grading makes it suitable for drive-cabinet ambient conditions.
Được đề xuất
Multi-Axis Vibration and Inertial Measurement
The MAX116CAX fits 3-axis or 4-axis vibration and inertial measurement systems where the relative phase between accelerometer or strain-gauge channels defines the vibration mode shape. Four T/H amplifiers on the MAX116CAX sample all axes simultaneously, preserving the phase information required for modal analysis and structural resonance detection. With 12-bit resolution and 116 ksps 4-channel throughput, the part captures vibration signatures up to about 50 kHz - sufficient for most rotating-machinery diagnostics. The SSOP-36 surface-mount package supports compact PCB assemblies inside MEMS-sensor interface boards.
Được đề xuất
Industrial Process Control Multi-Channel DAQ
The MAX116CAX integrates well into industrial process-control data-acquisition modules that monitor four critical process variables (flow, pressure, level, temperature) where snapshot synchronization is needed at control-loop update points. The 2 us per-channel conversion and SAR architecture deliver deterministic latency that simplifies PLC-style deterministic control loops. Its 8 single-ended inputs (two 4-channel banks) let a single MAX116CAX replace multiple single-channel ADCs in cost-sensitive PLC remote-I/O modules. The industrial temperature grade handles cabinet ambient and the SSOP package supports high-density SMT assembly lines.
Được đề xuất
Power-Line Disturbance Recorders
The MAX116CAX serves power-line disturbance and transient recorders where phase-to-ground voltage disturbances must be captured on multiple phases simultaneously to characterize lightning-induced surges, switching transients, and capacitor-bank switching events. The four-channel simultaneous-sampling capability guarantees that the waveform shape across all three phases plus neutral is captured with no timing error, enabling accurate root-cause analysis. With 116 ksps 4-channel throughput, the part is suitable for recording disturbances up to the harmonics range required by IEEE 1159 power-quality monitors. Industrial-grade components are required for substation ambient conditions.
Được đề xuất
Medical Multi-Parameter Patient Monitoring
The MAX116CAX fits medical multi-parameter patient monitors that need to acquire ECG, respiration, SpO2, and temperature channels at synchronized intervals for waveform alignment on the display. Four simultaneous track-and-hold amplifiers ensure that the ECG and respiration impedance channels are sampled at the same instant, eliminating motion-artifact mis-alignment between waveforms. The 12-bit resolution and SAR architecture deliver the deterministic latency required for IEC 60601-1 patient-monitor compliance testing. The SSOP-36 surface-mount package fits the compact form factor of bedside and ambulatory patient monitors.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX116CAX — 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 | MAX1156AEUP+T | MAX1154AEUE+T | MAX1147BEUP+T | MAX1145BEAP+ |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 36-pin SSOP (CAX) | 36-pin SSOP (CAX) - same | 36-pin SSOP (CAX) - same | 36-pin SSOP (CAX) - same | 36-pin SSOP (CAX) - same |
| Resolution | 12 bit | 14 bit | 12 bit | 12 bit | 12 bit |
| Architecture | SAR, simultaneous-sampling | SAR, simultaneous-sampling | SAR, simultaneous-sampling | SAR, simultaneous-sampling | SAR, simultaneous-sampling |
| Lifecycle Status | NRND | Active | Active | Active | Active |
Bảo phân biệt quan trọng
- Eight single-ended inputs in 2x4 simultaneous-sampling architecture (vsMAX1156AEUP+T)
- Active lifecycle status with 14-bit resolution (vsMAX116CAX (NRND))
- Two-mux-per-channel flexibility (vsMAX1145BEAP+)
Ghi chú thiết kế
Estimated: For a 36-pin SSOP land pattern following IPC-7351 nominal, allocate at least 0.5 mm clearance between SSOP leads and any digital signal traces on inner PCB layers to limit crosstalk into the analog inputs. Place a continuous ground plane on layer 2 directly under the SSOP footprint to provide a low-impedance return path for both AVDD and DVDD switching currents; the SAR core and serial interface on DVDD are the main sources of digital noise that can couple into AVDD through the package substrate.
Decouple AVDD with a 10 uF tantalum or ceramic bulk capacitor plus a 100 nF X7R ceramic capacitor placed within 5 mm of the AVDD pin. Decouple DVDD separately with the same 10 uF + 100 nF combination within 5 mm of the DVDD pin. Do NOT share the AVDD and DVDD ferrite beads' return path - keep the analog and digital grounds joined only at the ADC AGND pin (star grounding) to prevent digital return currents from corrupting analog measurements. Reference the MAX116 datasheet section 3 (Power-Supply Decoupling) for the manufacturer's recommended capacitor network.
Do not exceed the absolute maximum analog input voltage specified in the datasheet, or the input ESD diodes will forward-conduct and corrupt the conversion. When using the internal reference, ensure the REF pin is bypassed with the manufacturer-recommended capacitor network (typically 4.7 uF + 100 nF); an unbypassed REF pin is a leading cause of noisy conversions in field returns. The CONVST pin must be held low until all four T/H amplifiers have acquired their respective inputs - starting a conversion mid-acquisition yields sub-LSB noise and gain mismatch between channels.
Route the four analog input channels as matched-length, matched-impedance traces from the input connectors to the MAX116CAX pins to preserve amplitude and phase balance between channels; a 1 mm length mismatch between two channels at the analog bandwidth of ~1 MHz corresponds to a phase error of about 0.6 degrees, which is meaningful for power-factor measurement. Series-terminate the digital interface (SCLK, DOUT, EOC) at the source with a 33 ohm resistor to damp reflections on the bus to the host microcontroller.
Thông tin tuân thủ
Compliance information was not present in the verified web data; RoHS/REACH/lead-free status should be confirmed against the Maxim/Analog Devices product page or the manufacturer's declaration of conformity before use in automotive or medical designs.
