MAX1295ACEI+T - 12-Bit 6Ch 265ksps +3V ADC | Maxim Integrated
MPN: MAX1295ACEI+T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.5 | $11.50 |
| 10 | $10.35 | $103.50 |
| 100 | $9.2 | $920.00 |
| 500 | $8.05 | $4,025.00 |
| 1,000 | $6.9 | $6,900.00 |
MAX1295ACEI+T Overview
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.
Drop-in alternatives for MAX1295ACEI+T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MAX1295ACEI+T (same form factor and footprint) — differing in Sampling Rate, Analog Supply Voltage, Internal Reference, Number of Channels, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX1295ACEI+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1295AEEI+T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1290ACEI
✅ Drop-In✓ In Stock
$9.95 / Unit
View Datasheet →MAX1291BEEI
✅ Drop-In✓ In Stock
$9.4 / Unit
View Datasheet →MAX125CEXESGA-T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1295ACEI+T Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Sampling Rate | 265 ksps |
| Number of Channels | 6 single-ended / 3 pseudo-differential |
| Supply Voltage | +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 |
| Package | 28-pin QSOP (SSOP) |
| Mounting Type | Surface Mount |
| Terminal Form | GULL WING |
| Package Code | SSOP |
| Temperature Grade | COMMERCIAL |
| RoHS Status | Compliant (per Maxim/ADI product page) |
MAX1295ACEI+T Pin Configuration
| Pin 1 | AIN0 — Analog input channel 0 |
| Pin 2 | AIN1 — Analog input channel 1 |
| Pin 3 | AIN2 — Analog input channel 2 |
| Pin 4 | AIN3 — Analog input channel 3 |
| Pin 5 | AIN4 — Analog input channel 4 |
| Pin 6 | AIN5 — Analog input channel 5 |
| Pin 7 | AGND — Analog ground |
| Pin 8 | AVDD — +3V analog supply |
| Pin 9 | REF — Internal +2.5V reference output / bypass |
| Pin 10 | REFGND — Reference ground |
| Pin 11 | DVDD — Digital supply |
| Pin 12 | DGND — Digital ground |
| Pin 13 | CS — Chip select (active low) |
| Pin 14 | RD — Read strobe (active low) |
| Pin 15 | WR — Write strobe (active low) |
| Pin 16 | CONVST — Conversion start |
| Pin 17 | EOC — End of conversion |
| Pin 18 | INT — Interrupt output |
| Pin 19 | OSC — Oscillator / clock input |
| Pin 20 | D0 — Digital data output bit 0 (LSB) |
| Pin 21 | D1 — Digital data output bit 1 |
| Pin 22 | D2 — Digital data output bit 2 |
| Pin 23 | D3 — Digital data output bit 3 |
| Pin 24 | D4 — Digital data output bit 4 |
| Pin 25 | D5 — Digital data output bit 5 |
| Pin 26 | D6 — Digital data output bit 6 |
| Pin 27 | D7 — Digital data output bit 7 |
| Pin 28 | D8 — Digital data output bit 8 (MSB) |
Typical Applications
MAX1295ACEI+T is suitable for 7 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for MAX1295ACEI+T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Integrated +2.5V reference eliminates external reference IC (vs MAX1290ACEI)
- 6-channel MUX vs 2-channel on the MAX1297 family (vs MAX1297 family)
- Parallel interface minimises host-side latency (vs MAX1291BEEI)
Design Notes
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.
Compliance Information
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.
