MAX1295ACEI+T - 12-Bit 6Ch 265ksps +3V ADC | Maxim Integrated
MPN: MAX1295ACEI+T ✓ فعالMAX1295ACEI+T جائزہ
An ADC (Analog-to-Digital Converter) is a data-converter integrated circuit that samples continuous analog voltages and converts them into discrete digital codes for use by microcontrollers, DSPs, and FPGAs. SAR (successive-approximation register) ADCs such as the MAX1295ACEI+T sit in the data-converter hierarchy between flash converters (fast, expensive, low resolution) and sigma-delta converters (very high resolution, slow). They offer an optimal balance of speed, resolution, and power for multi-channel precision sensing. The MAX1295ACEI+T belongs to the broader category of precision ADCs > data converters > mixed-signal ICs > semiconductors.
Key features of the MAX1295ACEI+T include 12-bit resolution with ±0.5 LSB integral nonlinearity (INL), 265 ksps maximum sampling rate, software-configurable 6-channel single-ended or 3-channel pseudo-differential input MUX, internal low-drift +2.5V reference, single +3V analog supply operation, low power consumption, and a high-speed parallel digital interface compatible with microcontrollers and DSPs. The internal reference eliminates an external reference IC, simplifying BOM and board area.
The MAX1295ACEI+T uses a capacitive charge-distribution SAR architecture with an input track-and-hold. Its +2.5V internal reference achieves low drift across temperature, while the parallel byte/word interface minimises host-side timing complexity. An analog input multiplexer supporting 6 single-ended or 3 pseudo-differential channels is programmed through the digital interface, allowing a single ADC to monitor multiple sensors.
Typical uses include portable and battery-powered data-acquisition systems, industrial process-control front ends, multi-sensor monitoring in instrumentation, medical patient-monitoring channels, and any multi-channel precision-sensing application requiring a parallel-interface ADC. The wide input multiplexer count (6/3 channels) makes it particularly attractive where board real estate is at a premium.
When designing with the MAX1295ACEI+T, ensure the analog supply is well decoupled and the analog input traces are kept short and guarded from digital switching noise. The internal +2.5V reference requires adequate bypass capacitance close to the REF pin. Verify that the chosen microcontroller/DSP can read the parallel bus at the required conversion rate.
This page synthesises distributor stock and pricing data from DigiKey, Mouser, and Octopart, structured drop-in alternatives from the same product family, and practical design notes not found on the manufacturer datasheet cover page.
کے لیے ڈراپ اِن متبادل MAX1295ACEI+T — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں MAX1295ACEI+T (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Sampling Rate, Analog Supply Voltage, Internal Reference, Number of Channels, Operating Temperature Range.
MAX1295ACEI+
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
MAX1295AEEI+T
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
MAX1290ACEI
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →MAX1291BEEI
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →MAX125CEXESGA-T
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
MAX1295ACEI+T زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| ریزولوشن | 12 bits |
| سیمپلنگ ریٹ | 265 ksps |
| Number of Channels | 6 single-ended / 3 pseudo-differential |
| سپلائی وولٹیج | +3 V single supply |
| Internal Reference | +2.5 V |
| Integral Nonlinearity (INL) | ±0.5 LSB |
| Converter Architecture | SAR (Successive Approximation) |
| Analog Input Multiplexer | Software-configurable 6 SE / 3 PD |
| Digital Interface | Parallel |
| پیکیج | 28-pin QSOP (SSOP) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| Terminal Form | GULL WING |
| Package Code | SSOP |
| Temperature Grade | COMMERCIAL |
| RoHS اسٹیٹس | Compliant (per Maxim/ADI product page) |
MAX1295ACEI+T پن کنفیگریشن
| پن 1 | AIN0 — Analog input channel 0 |
| پن 2 | AIN1 — Analog input channel 1 |
| پن 3 | AIN2 — Analog input channel 2 |
| پن 4 | AIN3 — Analog input channel 3 |
| پن 5 | AIN4 — Analog input channel 4 |
| پن 6 | AIN5 — Analog input channel 5 |
| پن 7 | AGND — Analog ground |
| پن 8 | AVDD — +3V analog supply |
| پن 9 | REF — Internal +2.5V reference output / bypass |
| پن 10 | REFGND — Reference ground |
| پن 11 | DVDD — Digital supply |
| پن 12 | DGND — Digital ground |
| پن 13 | CS — Chip select (active low) |
| پن 14 | RD — Read strobe (active low) |
| پن 15 | WR — Write strobe (active low) |
| پن 16 | CONVST — Conversion start |
| پن 17 | EOC — End of conversion |
| پن 18 | INT — Interrupt output |
| پن 19 | OSC — Oscillator / clock input |
| پن 20 | D0 — Digital data output bit 0 (LSB) |
| پن 21 | D1 — Digital data output bit 1 |
| پن 22 | D2 — Digital data output bit 2 |
| پن 23 | D3 — Digital data output bit 3 |
| پن 24 | D4 — Digital data output bit 4 |
| پن 25 | D5 — Digital data output bit 5 |
| پن 26 | D6 — Digital data output bit 6 |
| پن 27 | D7 — Digital data output bit 7 |
| پن 28 | D8 — Digital data output bit 8 (MSB) |
عام استعمالات
MAX1295ACEI+T کے لیے موزوں ہے 7 ایپلیکیشنs: Portable Data-Acquisition Systems, Industrial Process Control, Medical Patient Monitoring, Instrumentation and Test Equipment, Multi-Sensor IoT Edge Nodes, Automotive Sensor Interfaces, Power Management and Battery Monitoring.
Portable Data-Acquisition Systems
The MAX1295ACEI+T fits portable and battery-powered data-acquisition front ends because it operates from a single +3V supply, integrates the +2.5V reference on-chip, and offers a 6-channel single-ended input multiplexer that lets one ADC scan multiple sensors. The 265 ksps sampling rate supports audio-bandwidth signals and vibration/accelerometer analysis. The shutdown mode reduces quiescent current between samples to extend battery life in field-portable instruments.
تجویز کردہ
Industrial Process Control
The MAX1295ACEI+T suits industrial process-control applications where multiple sensor types must be monitored with a single ADC. The 6-channel MUX supports thermocouple, RTD-bridge, pressure, and 4-20 mA-derived voltage signals through pseudo-differential conversion. The ±0.5 LSB INL and internal low-drift +2.5V reference maintain accuracy across the industrial temperature range, while the parallel interface minimises host processor latency in real-time control loops.
تجویز کردہ
Medical Patient Monitoring
The MAX1295ACEI+T is appropriate for medical patient-monitoring channel electronics where multi-sensor scanning (ECG, SpO2, temperature, respiration) is required from a single +3V supply rail. The internal +2.5V reference eliminates an external reference IC, reducing BOM and improving reliability for IEC 60601-1 compliant designs. The 12-bit resolution and pseudo-differential input mode improve common-mode rejection for body-coupled signals.
تجویز کردہ
Instrumentation and Test Equipment
The MAX1295ACEI+T is well-suited to bench-top and rack-mount test-and-measurement instruments including digital multimeters, oscilloscope auxiliary channels, and signal-analyser front ends. The 265 ksps sampling rate covers audio and low-RF baseband measurement bandwidths. The parallel interface streams conversion data directly to an FPGA or DSP for FFT and waveform analysis without I/O latency.
تجویز کردہ
Multi-Sensor IoT Edge Nodes
The MAX1295ACEI+T serves multi-sensor IoT edge-node gateway boards that aggregate analog sensors (temperature, humidity, gas, current, light) onto a single +3V ADC. The 6-channel MUX eliminates the need for multiple single-channel ADCs and reduces BOM cost and PCB area. The +3V single-supply operation aligns with battery or USB-powered IoT nodes, and the low power consumption extends operating time between charge cycles.
تجویز کردہ
Automotive Sensor Interfaces
The MAX1295ACEI+T (commercial temperature grade) supports non-critical automotive sensor-interface electronics such as cabin climate sensors, battery-monitoring channels, and body-control modules where multiple analog inputs are aggregated. For under-hood or powertrain applications requiring AEC-Q100 qualification and extended temperature grades, choose the MAX1295AEEI+T variant. The 12-bit/265 ksps performance and +3V supply fit 12V automotive battery-rail-derived sensor supplies.
تجویز کردہ
Power Management and Battery Monitoring
The MAX1295ACEI+T serves power-management and battery-monitoring subsystems where multiple voltage and current channels must be sampled in sequence. The 6-channel MUX supports per-cell voltage scanning in multi-cell battery stacks, while the internal +2.5V reference provides stable ADC accuracy across temperature. The parallel interface allows an external supervisor MCU or FPGA to read conversions without I2C/SPI timing overhead.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا MAX1295ACEI+T — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | MAX1295ACEI+ | MAX1295AEEI+T | MAX1290ACEI | MAX1291BEEI |
|---|---|---|---|---|---|
| Package | 28-pin QSOP | 28-pin QSOP - same | 28-pin QSOP - same | 28-pin QSOP - same | 28-pin QSOP - same |
| Brand | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Number of Input Channels | 6 SE / 3 PD | 6 SE / 3 PD | 6 SE / 3 PD | 8 SE / 4 PD | 8 SE / 4 PD |
| Supply Voltage | +3V single supply | +3V single supply | +3V single supply | +3V single supply | +3V single supply |
| Internal Reference | +2.5V internal | +2.5V internal | +2.5V internal | +2.5V internal | +2.5V internal |
| Digital Interface | Parallel | Parallel | Parallel | Parallel | Serial (SPI/QSPI/MICROWIRE) |
| Temperature Grade | COMMERCIAL | COMMERCIAL | EXTENDED/AUTOMOTIVE | COMMERCIAL | EXTENDED |
اہم امتیازی خصوصیات
- Integrated +2.5V reference eliminates external reference IC (بمقابلہMAX1290ACEI)
- 6-channel MUX vs 2-channel on the MAX1297 family (بمقابلہMAX1297 family)
- Parallel interface minimises host-side latency (بمقابلہMAX1291BEEI)
ڈیزائن نوٹس
The MAX1295ACEI+T operates from a single +3V analog supply. Decouple AVDD with a 10uF tantalum or ceramic bulk capacitor in parallel with a 0.1uF ceramic high-frequency bypass capacitor placed as close to the AVDD pin as possible. DVDD (digital supply) must also be decoupled locally. Any noise on AVDD directly degrades sample and noise performance; consider a ferrite bead or LC filter between the system +3V rail and the ADC AVDD pin in noise-sensitive applications.
Use a star-ground topology with the AGND/DGND pins tied at a single point near the IC. Keep analog input traces short and guarded by a ground pour on both sides of the trace. Avoid routing digital signals (parallel bus, CS, RD, WR) directly across analog input traces. Place the +2.5V reference bypass capacitor (typically 0.1uF to 10uF, see datasheet) directly at the REF pin with the shortest possible PCB trace.
For pseudo-differential input mode, the common-mode input range and the absolute input voltage range are both limited to within the AVDD/AGND rails. Add external RC anti-aliasing filters on each analog input (typically 100 ohms + 1nF giving ~1.6 MHz bandwidth) to suppress out-of-band noise that could otherwise fold into the conversion bandwidth. The track-and-hold acquisition time requirement is a function of source impedance - keep the source impedance below ~1 kohm for full 12-bit accuracy at 265 ksps.
Do not leave unused analog inputs floating - tie them to AGND or a known mid-rail voltage through a defined source impedance. Floating inputs can inject charge into the MUX and cause cross-talk or excessive channel-to-channel offset. Verify the host MCU/FPGA can read the parallel bus at the required conversion rate; the MAX1295ACEI+T can produce a new conversion every ~3.8 us at 265 ksps. Always perform a calibration read after power-up if the application requires absolute accuracy better than 1 LSB.
تعمیل کی معلومات
RoHS and REACH compliant per Maxim Integrated / Analog Devices product page. AEC-Q100 not qualified at the COMMERCIAL temperature grade - choose MAX1295AEEI+T for automotive applications. Lead-free (Pb-free) package per datasheet terminal-finish specification. Halogen-free status not explicitly stated in the verified web data and is marked unknown.
