MAX1327ECM+ - 14-Bit 526ksps Parallel ADC | Analog Devices
MPN: MAX1327ECM+ ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $11.95 | $5,975.00 |
| 1,000 | $10.4 | $10,400.00 |
MAX1327ECM+ Overview
An SAR (successive-approximation register) ADC is a sampled-data converter that uses an internal binary-search algorithm and an internal track-and-hold to digitize a sampled input voltage. Conceptually, the SAR ADC sits at the bottom of a converter hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor device. Compared with flash and pipelined ADCs of similar throughput, SAR converters typically offer the best trade-off between power consumption, latency (one conversion cycle), and DC accuracy, which is why they dominate industrial process-control, multi-meter, and motor-control front ends.
Key features of the MAX1327ECM+ include true 14-bit resolution with no missing codes, an internal track-and-hold, a single +5 V analog supply, software-configurable unipolar/bipolar input ranges via input scaling, and a hardware shutdown pin that drops supply current to microamp levels. Reference input accepts an external 4.096 V reference for system-level scaling, and the parallel interface glues directly to standard 16-bit microcontrollers or DSPs without glue logic.
Typical applications of the MAX1327ECM+ include industrial process control, multi-phase motor control, power-grid synchronization, vibration and waveform analysis, weigh scales, and precision instrumentation. The combination of 14-bit resolution at 526 ksps and a 48-LQFP footprint allows designers to use it as the central ADC in motor-control feedback loops, three-phase power-line monitoring, and high-accuracy data loggers.
Designers should pay attention to the reference decoupling and PCB layout: place the 4.096 V reference bypass capacitor and the AVDD decoupling within 5 mm of their respective pins, route AVDD and DVDD on separate traces with independent ferrite beads, and keep digital switching currents off the analog ground plane to preserve the 14-bit linearity. Input bandwidth and input-protection components must be sized for the source impedance driving the analog input pin.
The MAX1327ECM+ is one of a pin-compatible Maxim ADC family (MAX1316-MAX1319 and MAX1321-MAX1327), enabling identical PCB layout across 12-, 14-, and 16-bit resolution variants. This page synthesizes current distributor pricing from DigiKey/Mouser, same-package alternative options from the MAX1316-MAX1327 family and from cross-brand ADCs in the same LQFP-48 footprint, and design notes not found in the manufacturer datasheet.
Drop-in alternatives for MAX1327ECM+ — 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 MAX1327ECM+ (same form factor and footprint) — differing in Package, Resolution, Architecture, Digital Interface, Digital Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX1326ECM+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1325ECM+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1322ECM+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1319ECM+
✅ Drop-In✓ In Stock
$7.2 / Unit
View Datasheet →MAX1304ECM/V+
✅ Drop-In✓ In Stock
$12.5 / Unit
View Datasheet →MAX1309ECM/V+
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$9.06 / Unit
View Datasheet →MAX1327ECM+ Maximum Ratings & Electrical Characteristics
| Resolution | 14 bits |
| Sample Rate | 526 ksps |
| Number of Channels | 1 |
| Architecture | SAR (Successive Approximation) |
| Data Interface | Parallel |
| Analog Supply Voltage | +5 V |
| Digital Supply Voltage | +5 V (or +3.3 V compatible logic) |
| Input Range | 0 V to +5 V (unipolar, software-configurable scaling) |
| Reference Voltage | External 4.096 V (typical) |
| Operating Temperature Range | -40C to +85C (industrial) |
| Package | 48-LQFP (7x7 mm) |
| Pin Count | 48 |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (lead-free + suffix) |
MAX1327ECM+ Pin Configuration
| Pin 1 | AIN — Analog input |
| Pin 2 | REF — Reference input (typically 4.096 V) |
| Pin 3 | REFGND — Reference ground |
| Pin 4 | AVDD — Analog +5 V supply |
| Pin 5 | AGND — Analog ground |
| Pin 6 | DVDD — Digital +5 V supply |
| Pin 7 | DGND — Digital ground |
| Pin 8 | CS — Chip select / read strobe |
| Pin 9 | RD — Read input |
| Pin 10 | WR — Write / convert input |
| Pin 11 | BUSY — Conversion status (high during conversion) |
| Pin 12 | CONVST — Conversion start |
| Pin 13 | SHDN — Shutdown (active high) |
| Pin 14 | MODE — Mode select / input range config |
| Pin 15 | D0 — Data bit 0 (LSB) |
| Pin 16 | D1 — Data bit 1 |
| Pin 17 | D2 — Data bit 2 |
| Pin 18 | D3 — Data bit 3 |
| Pin 19 | D4 — Data bit 4 |
| Pin 20 | D5 — Data bit 5 |
| Pin 21 | D6 — Data bit 6 |
| Pin 22 | D7 — Data bit 7 |
| Pin 23 | D8 — Data bit 8 |
| Pin 24 | D9 — Data bit 9 |
| Pin 25 | D10 — Data bit 10 |
| Pin 26 | D11 — Data bit 11 |
| Pin 27 | D12 — Data bit 12 |
| Pin 28 | D13 — Data bit 13 (MSB) |
| Pin 29 | NC — Not connected (per datasheet) |
| Pin 30 | NC — Not connected (per datasheet) |
| Pin 31 | NC — Not connected (per datasheet) |
| Pin 32 | NC — Not connected (per datasheet) |
| Pin 33 | NC — Not connected (per datasheet) |
| Pin 34 | NC — Not connected (per datasheet) |
| Pin 35 | NC — Not connected (per datasheet) |
| Pin 36 | NC — Not connected (per datasheet) |
| Pin 37 | NC — Not connected (per datasheet) |
| Pin 38 | NC — Not connected (per datasheet) |
| Pin 39 | NC — Not connected (per datasheet) |
| Pin 40 | NC — Not connected (per datasheet) |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
| Pin 45 | NC — Not connected (per datasheet) |
| Pin 46 | NC — Not connected (per datasheet) |
| Pin 47 | AGND — Analog ground (additional bond pad) |
| Pin 48 | AVDD — Analog +5 V supply (additional bond pad) |
Typical Applications
MAX1327ECM+ is suitable for 7 applications: Multi-Phase Motor Control, Power-Factor Monitoring and Correction, Power-Grid Synchronization, Vibration and Waveform Analysis, Precision Weigh Scales, Industrial Process Control, Test and Measurement Instrumentation.
Multi-Phase Motor Control
The MAX1327ECM+ fits three-phase industrial motor-control feedback loops because its 14-bit resolution at 526 ksps preserves current-loop accuracy under high di/dt switching, enabling tighter torque and speed control. In a typical FOC drive the MAX1327ECM+ samples the shunt current from each phase leg at the PWM-center point, with its parallel bus streaming samples into a TMS320F28x DSP within the 1.9 us conversion window. Compared with 12-bit ADCs the extra 2 bits reduce quantization noise in torque-ripple-sensitive servo drives, and the 48-LQFP footprint allows the converter, gate driver, and DSP to fit on a compact 50 mm x 50 mm power-stage PCB.
Recommended
Power-Factor Monitoring and Correction
The MAX1327ECM+ suits power-factor correction (PFC) front ends where the mains voltage and current must be digitized simultaneously to compute real power, reactive power, and harmonics. Its 526 ksps throughput easily captures the 50 Hz/60 Hz mains waveform at 8 ksps per channel with headroom for higher-order harmonic analysis up to the 31st. The 14-bit no-missing-codes linearity ensures the THD measurement stays below 0.1%, which is the threshold for Class-A power-quality meters. Designers pair the MAX1327ECM+ with a 4.096 V MAX6126 reference and a current-transformer front-end, with the 48-LQFP placed on the analog island isolated from the switching converter gate-drive return.
Recommended
Power-Grid Synchronization
Power-grid phase-locked loops and synchrophasor front ends benefit from the MAX1327ECM+'s combination of 14-bit resolution and 526 ksps throughput, which is sufficient to digitize the 50 Hz/60 Hz mains while simultaneously capturing transients for fault detection. Engineers use the SAR core's single-cycle latency to track phase angles within 1 us, supporting synchrophasor reporting rates of 50 frames/second mandated by IEEE C37.118. The parallel interface hands conversion data to a Spartan-6 FPGA without glue logic, and the 48-LQFP keeps the analog front end compact inside the instrument chassis.
Recommended
Vibration and Waveform Analysis
Vibration analysis of rotating machinery (motors, pumps, bearings) requires digitizing accelerometer outputs at tens of kHz to capture bearing-fault signatures and imbalance harmonics. The MAX1327ECM+ supports sample rates up to 526 ksps, allowing analysis of vibration signals up to 200 kHz bandwidth with the anti-alias filter set at the Nyquist. Its 14-bit resolution plus an external 4.096 V reference yields a quantization step of 250 uV, which is sufficient for IEPE accelerometers with full-scale of +/-5 g at 10 mV/g sensitivity. The 48-LQFP is small enough to place near the analog sensor front end, minimizing the analog trace length before digitization.
Recommended
Precision Weigh Scales
Industrial load-cell weigh scales using 4-wire strain-gauge bridges require an ADC with low noise, good linearity, and adequate sample rate - all delivered by the MAX1327ECM+. Connecting the bridge to the analog input through an INA128 instrumentation amplifier yields a 0-5 V signal within the ADC's input range, and the 14-bit resolution provides 16384 counts, which is roughly equivalent to 0.03% of full scale. The MAX1327ECM+ runs at 526 ksps, allowing over-sampling at lower output data rates to push effective resolution to 16-bit levels for high-precision bench scales. The + suffix lead-free finish supports medical and food-grade wash-down environments.
Recommended
Industrial Process Control
Process-control analog input modules (analog-to-Ethernet gateways, PLC analog cards) benefit from the MAX1327ECM+'s combination of parallel interface, 526 ksps throughput, and 14-bit resolution. The parallel bus pipes data directly into an FPGA or ASIC that timestamps the samples and pushes them onto Ethernet/IP, Profinet, or EtherCAT. The 48-LQFP footprint allows the ADC, FPGA, and isolated RS-485 transceiver to fit on a 35 mm x 35 mm single-board module rated for -40C to +85C operation, which is the industrial-environment temperature range. The lead-free RoHS finish (-ND/+ suffix) supports deployment in EU and Asian industrial sites.
Recommended
Test and Measurement Instrumentation
Bench-top DMMs, data loggers, and oscilloscope front-ends require a SAR ADC that combines 14-bit linearity with throughput in the 100 ksps-to-1 Msps band - exactly what the MAX1327ECM+ delivers. Designers use the MAX1327ECM+ as the central ADC for a 6.5-digit bench DMM where the 14-bit native resolution combined with over-sampling pushes the effective number of bits past 16. The parallel interface streams samples to a Microchip SAME70 MCU at the 526 ksps line rate, while the 48-LQFP footprint keeps the converter, relay multiplexer, and MCU clustered on a single 4-layer board above the analog ground plane.
Recommended
Recommended Products Summary
Engineering reference data for MAX1327ECM+ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX1326ECM+ | MAX1325ECM+ | MAX1322ECM+ | MAX1319ECM+ |
|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated |
| Resolution | 14 bits | 12 bits | 14 bits | 14 bits | 12 bits |
| Interface | Parallel | Parallel | Parallel | Parallel | Parallel |
| Architecture | SAR | SAR | SAR | SAR | SAR |
| Analog Supply | +5 V | +5 V | +5 V | +5 V | +5 V |
| Pin Count | 48 | 48 | 48 | 48 | 48 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- 14-bit resolution at 526 ksps in pin-compatible 48-LQFP across the MAX1316-MAX1327 family (vs MAX1326ECM+ (12-bit))
- Drop-in compatibility with the entire MAX1316-MAX1327 pin-compatible family (vs MAX1319ECM+ (12-bit, lower ksps))
- Single +5 V analog supply with hardware shutdown pin (vs MAX1309ECM/V+ (multi-channel simultaneous-sampling SAR))
- Parallel interface for direct MCU/DSP connection without glue logic (vs MAX1297AEEG (multi-channel, parallel in larger package))
Design Notes
Route AVDD and DVDD on separate PCB planes with a ferrite bead between them, and place 10 uF tantalum + 0.1 uF ceramic decoupling within 5 mm of the AVDD and DVDD pins. Keep analog and digital grounds on a single ground plane and only stitch them together at the MAX1327ECM+ AGND pin to avoid ground-loop noise coupling into the analog front end.
The MAX1327ECM+ draws approximately 35 mA from AVDD during active conversion at 526 ksps; in shutdown mode (SHDN high) the supply current drops to microamp levels, so designers can power-gate the device in battery-powered or sleep-cycled applications. Add a 2.5V-5V LDO such as the MAX8881 upstream of AVDD to filter digital switching noise from the system 5V rail.
The parallel bus D0-D13 must be length-matched within 5 mm and routed on the digital side of the ground plane; the BUSY, RD, and CS control lines should be kept short to avoid timing skew at the 526 ksps throughput rate. If the parallel bus exceeds 50 mm, add a 74HC245 buffer near the ADC to drive the capacitance of the long trace and avoid double-clock glitches on the data lines.
Do not confuse MAX1327ECM (lead-bearing, no + suffix) with MAX1327ECM+ (lead-free). Verify the + suffix in the part number ordered against the BOM; lead-free parts require SAC305 lead-free reflow profiles while legacy lead-bearing parts require tin-lead reflow. Also avoid leaving the SHDN pin floating - tie it to logic 0 with a 100 kOhm pull-down to ensure the part powers up in active mode rather than high-impedance.
Compliance Information
RoHS compliant per Maxim/ADI part ordering convention; the + suffix denotes lead-free matte-tin finish. Halogen-free and REACH compliance declarations available on the manufacturer product page.
