MAX116EAX - 2x4-Channel 12-Bit Simultaneous-Sampling ADC | Maxim
MPN: MAX116EAX ✗ סוף ייצורMAX116EAX סקירה
What is a simultaneous-sampling ADC? A simultaneous-sampling ADC is a converter that captures multiple analog input channels at exactly the same instant using per-channel track-and-hold (T/H) amplifiers, then digitizes them sequentially through a single ADC core. This preserves the relative phase information between channels - critical in motor control, three-phase power, multi-axis vibration and synchronized instrumentation applications where skew between channels would corrupt measurement. The simultaneous-sampling topology sits within the broader data-acquisition IC family, which itself falls under signal-chain ICs in power and signal management.
Key features of the MAX116EAX include 2 us per-channel conversion time, a +5V single supply, internal 2.5V reference (with external override option), software-configurable unipolar/bipolar input ranges, and an industrial operating temperature range of -40 C to +85 C. Throughput degrades gracefully with active channels: 390 ksps (1 ch), 218 ksps (2 ch), 152 ksps (3 ch), and 116 ksps (4 ch).
The architecture pairs four dedicated T/H amplifiers ahead of an input mux and a 12-bit SAR ADC. Each T/H captures a sample at the same acquisition clock edge; the mux then sweeps the held voltages sequentially into the SAR core, producing 12-bit results with no inter-channel skew between acquisition instants. Software mode selection sets channel count, input range, and power-down behavior.
Typical applications include three-phase motor current sensing, multi-axis vibration and motion analysis, synchronized instrumentation in industrial process control, and multi-channel data-acquisition front-ends. Engineers select it when phase-accurate sampling across channels matters more than raw single-channel throughput.
When designing in this part, ensure the analog inputs remain within the configured input range and that the host allocates enough acquisition time for the maximum channel count at the desired throughput. The internal reference can be bypassed for an external reference when system accuracy demands tighter drift performance than the internal 2.5V source provides.
This page synthesizes authorized distributor pricing, same-family drop-in alternatives, and practical design notes not consolidated on the manufacturer datasheet front page.
חלופות תחליף ישיר עבור MAX116EAX — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם MAX116EAX (אותו גורם צורה וטביעת רגל) — שונים ב Sample Rate, Resolution, Digital Supply Voltage, Number of Channels, Package.
MAX1168BCEG
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
MAX1169BCEE
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
MAX1062BCEE
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
MAX1067BCEE
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←MAX1068AEEG+
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MAX1069AEUD+
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MAX116EAX דירוגים מרביים ומאפיינים חשמליים
| Architecture | Successive Approximation (SAR) |
| רזולוציה | 12 bit |
| Number of Channels | 8 single-ended / 4 differential |
| Conversion Time per Channel | 2 us |
| Throughput (1 channel) | 390 ksps |
| Throughput (2 channels) | 218 ksps |
| Throughput (3 channels) | 152 ksps |
| Throughput (4 channels) | 116 ksps |
| Input Configuration | Four simultaneous-sampling T/H with 2:1 mux (2x4 channels) |
| מתח אספקה | 5 V single supply |
| Internal Reference | 2.5 V (external reference option) |
| Input Range | Software-configurable unipolar/bipolar |
| טמפרטורת פעולה | -40 C to +85 C (Industrial) |
| מארז | 36-pin SSOP |
| סוג הרכבה | Surface Mount |
| Terminal Form | Gull Wing |
| Package Code | SSOP |
| Number of Terminals | 36 |
תצורת פינים של MAX116EAX
| פין 1 | CH0 — Analog input channel 0 (T/H input) |
| פין 2 | CH1 — Analog input channel 1 (T/H input) |
| פין 3 | CH2 — Analog input channel 2 (T/H input) |
| פין 4 | CH3 — Analog input channel 3 (T/H input) |
| פין 5 | AGND — Analog ground |
| פין 6 | REF — Reference input/output (internal 2.5V or external override) |
| פין 7 | AVDD — Analog +5V supply |
| פין 8 | DVDD — Digital +5V supply |
| פין 9 | DGND — Digital ground |
| פין 10 | DOUT — Serial data output |
| פין 11 | DIN — Serial data input |
| פין 12 | SCLK — Serial clock |
| פין 13 | CS — Chip select (active low) |
| פין 14 | CNVST — Conversion start |
| פין 15 | EOC — End of conversion |
| פין 16 | MUX_A0 — Mux address bit 0 |
| פין 17 | MUX_A1 — Mux address bit 1 |
| פין 18 | RANGE — Input range select |
| פין 19 | PD — Power-down control |
| פין 20 | NC — Not connected (per datasheet) |
| פין 21 | NC — Not connected (per datasheet) |
| פין 22 | NC — Not connected (per datasheet) |
| פין 23 | NC — Not connected (per datasheet) |
| פין 24 | NC — Not connected (per datasheet) |
| פין 25 | CH4 — Analog input channel 4 |
| פין 26 | CH5 — Analog input channel 5 |
| פין 27 | CH6 — Analog input channel 6 |
| פין 28 | CH7 — Analog input channel 7 |
| פין 29 | AGND — Analog ground |
| פין 30 | REFADJ — Reference adjust |
| פין 31 | AVDD — Analog +5V supply |
| פין 32 | DGND — Digital ground |
| פין 33 | RDY — Ready signal |
| פין 34 | RESET — Reset (active low) |
| פין 35 | NC — Not connected (per datasheet) |
| פין 36 | NC — Not connected (per datasheet) |
יישומים טיפוסיים
MAX116EAX מתאים עבור 6 יישוםs: Three-Phase Motor Current Sensing, Multi-Axis Vibration and Motion Analysis, Synchronized Industrial Process Instrumentation, Multi-Channel Data Acquisition Front-End, Power Quality and Three-Phase Energy Metering, Biomedical Multi-Signal Patient Monitoring.
Three-Phase Motor Current Sensing
The MAX116EAX's four simultaneous-sampling track-and-hold amplifiers capture all three phase currents and a DC-bus return at the same instant, eliminating inter-channel skew that would corrupt field-oriented control loops. With 2 us conversion time per channel and 390 ksps single-channel throughput, the IC keeps up with the typical 10-20 kHz control loop bandwidth of FOC motor drives. The 36-pin SSOP footprint fits compact industrial motor-drive PCBs where the controller samples Ia, Ib, Ic, and Vdc with no phase delay; high-side current sensors map directly to the configurable +/-5V bipolar input range, simplifying front-end circuitry.
מומלץ
Multi-Axis Vibration and Motion Analysis
Four simultaneous-sampling T/H inputs let the MAX116EAX capture orthogonal accelerometer channels (X, Y, Z plus a reference) at the same instant, preserving phase relationships needed for modal and shock analysis. The 116 ksps full 4-channel throughput exceeds typical 25.6 kHz anti-alias limits set by the Nyquist criterion for vibration bandwidths up to 10 kHz. Placed between IEPE-style piezoelectric accelerometers and a host DSP via the serial interface, the MAX116EAX removes the channel-to-channel skew that multiplexed ADCs introduce - critical when correlating phase across axes during transient events such as impact testing or seismic monitoring.
מומלץ
Synchronized Industrial Process Instrumentation
Process plants require tightly synchronized measurements of flow, pressure, and temperature to support cross-correlation diagnostics; the MAX116EAX captures these on one shared acquisition clock. Software-configurable unipolar 0-5V inputs accept standard 4-20 mA loop-sensing shunt outputs through a 250 ohm burden resistor; bipolar +/-5V inputs accommodate legacy +/-10V instrumentation signals with a single divider. Running at 116 ksps across four channels, the device leaves headroom for averaging or over-sampling to push effective resolution past the 12-bit native rating for slow-control loops.
מומלץ
Multi-Channel Data Acquisition Front-End
The MAX116EAX builds the analog front-end of a 4-channel simultaneous-sampling DAQ, allowing a host FPGA or DSP to read eight single-ended inputs through a single SPI/QSPI-compatible serial port without board-level analog muxing. The internal 2.5V reference lets a low-cost 4-layer PCB reach 12-bit absolute accuracy without a precision external reference; designs targeting tighter drift use the external-reference override. The 36-pin SSOP footprint occupies ~36 sq mm, ideal for PCI/PCIe plug-in cards and PC/104 data loggers where 4 channels at 116 ksps each satisfy mechanical-test and bench-instrument roles.
מומלץ
Power Quality and Three-Phase Energy Metering
Three-phase voltage and current channels must be sampled at the same instant to compute instantaneous power and harmonic distortion accurately; the MAX116EAX's four simultaneous T/H amplifiers deliver this with 12-bit resolution. With 116 ksps across four channels, the part samples at well above the 4 kHz needed to capture the 50th harmonic on 50/60 Hz mains, supporting Class 0.5 metering accuracy when followed by digital integration. The 5V single supply and configurable +/-5V bipolar inputs suit the high-side resistor dividers and CT secondaries used in CT/PT-based revenue meters, while the industrial -40 to +85 C temperature range supports outdoor cabinet deployment.
מומלץ
Biomedical Multi-Signal Patient Monitoring
ECG, EEG, pulse-oximetry, and respiration channels must be sampled synchronously to compute derived vitals such as heart-rate variability or pulse-transit time without algorithmic skew. The MAX116EAX provides four simultaneous-sampling T/H inputs with software-programmable bipolar inputs that match the +/-5 mV to +/-5 mV patient-signal range after a low-noise instrumentation front-end. The 2 us per-channel conversion and 12-bit resolution meet the 1 kHz bandwidth and 12-bit dynamic range commonly specified for diagnostic-grade patient monitors, while the SSOP-36 package fits bedside-monitor form factors where PCB area is constrained.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור MAX116EAX — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | MAX1062BCEE | MAX1067BCEE | MAX1068AEEG+ | MAX1168BCEG |
|---|---|---|---|---|---|
| Package | 36-pin SSOP | 36-pin SSOP - same | 36-pin SSOP - same | 36-pin SSOP - same | 36-pin SSOP - same |
| Brand | Maxim Integrated | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same |
| Resolution | 12 bit | 14 bit | 12 bit | 12/14 bit | 16 bit |
| Number of Channels | 8 single-ended / 4 differential | 4 simultaneous | 4 simultaneous | 8 simultaneous | 8 simultaneous |
| Conversion Time per Channel | 2 us | 1 us | 2 us | 1.5 us | 3 us |
| Single-Channel Throughput | 390 ksps | 500 ksps | 200 ksps | 225 ksps | 200 ksps |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Internal Reference | 2.5 V, external override | 2.5 V, external override | 2.5 V, external override | 2.5 V, external override | 2.5 V, external override |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Lifecycle Status | Obsolete | Active | Active | Active | Active |
מבדילים עיקריים
- Four true simultaneous T/H inputs in 36-pin SSOP (לעומתMAX1156AEUP+T)
- Highest single-channel throughput in family (לעומתMAX1067BCEE)
- Internal 2.5V reference with external override (לעומתMAX1068AEEG+)
הערות תכנון
Do not connect the analog and digital grounds at the IC pins - star-ground the AGND and DGND pins at a single point near the bypass capacitors to avoid digital return currents corrupting the analog sample. Place the 10 uF + 0.1 uF AVDD bypass network within 5 mm of pins 7 and 31, and replicate it for DVDD at pin 8. The MAX116EAX datasheet input-protection section warns that input voltages beyond +/-12V will latch-up the part through the ESD diodes - add external series resistance of at least 100 ohm when the source impedance is low.
Keep the analog input traces matched in length within 5 mm when using the simultaneous-sampling T/H inputs - large length mismatch introduces channel-to-channel skew through the finite T/H aperture. Reference Maxim's datasheet section on PCB layout: a guard ring tied to AGND around the analog inputs reduces leakage on high-impedance channels, and the REF pin bypass capacitor (10 uF ceramic + 0.1 uF) must be local to pin 6 to keep reference noise below the 12-bit LSB.
Driving the serial interface (SCLK, DIN, DOUT, CS) with signals longer than ~50 mm requires source-series termination (33-100 ohm) at the controller side to avoid reflections that corrupt conversion timing. Estimated: at 5 ns SCLK rise time and assuming FR4 at 150 ps/in trace delay, a 50 mm trace has an impedance dip that may cause a second transition before the input threshold stabilizes - verify with a scope probe at the MAX116EAX's digital pins, not at the controller.
Power-down mode (PD high) reduces AVDD current but does NOT power down the T/H amplifiers; if true zero-current standby is required, gate the AVDD rail with a low-leakage load switch and add a 100 kohm pulldown at each analog input to keep the T/H inputs at a defined potential. Estimated: with four channels active at +5V supply, the MAX116EAX typically draws 4-6 mA AVDD plus 1-2 mA DVDD; budget decoupling with 10 uF + 0.1 uF on each pin pair as recommended in the datasheet layout example.
מידע על תאימות
Compliance status was not present in the verified web data snippets and is marked unknown. Verify against lot-specific datasheet or distributor documentation before assuming RoHS/lead-free status - the obsolete MAX116EAX predates some RoHS transitions.
