MAX11332ATJ+T - 3Msps 12-Bit 16-Ch SAR ADC | Analog Devices
MPN: MAX11332ATJ+T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.95 | $7.95 |
| 10 | $7.16 | $71.60 |
| 100 | $6.36 | $636.00 |
| 500 | $5.72 | $2,860.00 |
| 1,000 | $5.08 | $5,080.00 |
MAX11332ATJ+T Overview
A SAR ADC is a type of analog-to-digital converter that performs conversion by binary-searching against a precision DAC and a comparator in a single clock cycle per bit. Within the broader data converter hierarchy, SAR ADCs sit between flash converters (fastest, lowest resolution) and delta-sigma ADCs (slowest, highest resolution). The MAX11332's 12-bit resolution with 3 Msps throughput makes it ideal for multiplexed multi-channel systems where fast acquisition and deterministic latency matter more than absolute noise floor. The post-mux signal conditioning access allows external amplifiers, filters, or sensor biasing between the analog input pins and the internal sample-and-hold.
Key features include 3 Msps maximum sampling rate, 12-bit no-missing-codes resolution, 16 analog input channels (selectable 8 or 16 via configuration), an external reference voltage input for measurement flexibility, low power consumption (approximately 5.5 mW at 3 Msps), 500 kHz full-linear bandwidth, and a high-speed SPI-compatible serial interface operating up to 50 MHz. The TQFN-EP package provides a thermal pad that reduces junction-to-ambient thermal resistance to approximately 32 C/W.
Architecture-wise, the device integrates an input multiplexer, sample-and-hold amplifier, SAR conversion core, reference buffer, and serial output logic on a single die. The external reference allows the user to optimize the ADC's input range to match sensor signals (e.g., 2.5V, 4.096V), which improves quantization noise utilization compared to a fixed 5V input range.
Typical applications include multi-channel data acquisition systems, industrial process control and sensor monitoring, patient monitoring and medical instrumentation, programmable logic controllers (PLCs), and battery-powered portable instrumentation. The combination of 16 channels in a compact TQFN footprint replaces up to four dual-channel ADCs, saving board space.
When designing with the MAX11332ATJ+T, ensure the external reference source is low-noise and adequately bypassed; a noisy reference directly multiplies into ADC output. Place a 0.1 uF ceramic decoupling capacitor close to each supply pin, and follow the PCB layout guidelines in the datasheet to preserve full 500 kHz input bandwidth.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineering decision support beyond what Analog Devices' product page offers.
Drop-in alternatives for MAX11332ATJ+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 MAX11332ATJ+T (same form factor and footprint) — differing in Input Type, Package, Number of Input Channels, Operating Temperature, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX11331ATJ+T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX11324ATJ+T
✅ Drop-In✓ In Stock
$4.72 / Unit
View Datasheet →MAX11321ATJ+T
✅ Drop-In✓ In Stock
$8.78 / Unit
View Datasheet →MAX11329ATJ+T
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →MAX11332ATJ+T Maximum Ratings & Electrical Characteristics
| Resolution | 12 bit |
| Sampling Rate | 3 Msps |
| Number of Input Channels | 8 or 16 (configurable) |
| Input Type | Single-Ended, Analog Mux |
| Architecture | SAR (Successive Approximation Register) |
| Reference Type | External |
| Full-Linear Bandwidth | 500 kHz |
| Digital Interface | Serial SPI/QSPI/MICROWIRE-compatible |
| Package | 32-pin TQFN-EP (5x5 mm) |
| Operating Supply Voltage | 3.3 V (single supply) |
| Analog Input Range | 0 V to VREF |
| Power Consumption | 5.5 mW at 3 Msps |
| No Missing Codes | Yes (12 bit) |
| Operating Temperature | -40 C to +125 C |
| Mounting Type | Surface Mount |
MAX11332ATJ+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 | AIN6 — Analog Input Channel 6 |
| Pin 8 | AIN7 — Analog Input Channel 7 |
| Pin 9 | AIN8 — Analog Input Channel 8 |
| Pin 10 | AIN9 — Analog Input Channel 9 |
| Pin 11 | AIN10 — Analog Input Channel 10 |
| Pin 12 | AIN11 — Analog Input Channel 11 |
| Pin 13 | AIN12 — Analog Input Channel 12 |
| Pin 14 | AIN13 — Analog Input Channel 13 |
| Pin 15 | AIN14 — Analog Input Channel 14 |
| Pin 16 | AIN15 — Analog Input Channel 15 |
| Pin 17 | REF — External Reference Voltage Input |
| Pin 18 | AVDD — Analog Power Supply (3.3V) |
| Pin 19 | AGND — Analog Ground |
| Pin 20 | CS — Chip Select (active low) |
| Pin 21 | SCLK — Serial Clock Input |
| Pin 22 | DIN — Serial Data Input |
| Pin 23 | DOUT — Serial Data Output |
| Pin 24 | DRDY — Data Ready Output |
| Pin 25 | DVDD — Digital Power Supply |
| Pin 26 | DGND — Digital Ground |
| Pin 27 | GPO0 — General Purpose Output 0 |
| Pin 28 | GPO1 — General Purpose Output 1 |
| Pin 29 | NC — Not connected (per datasheet) |
| Pin 30 | NC — Not connected (per datasheet) |
| Pin 31 | NC — Not connected (per datasheet) |
| Pin 32 | EP — Exposed Thermal Pad (connect to AGND) |
Typical Applications
MAX11332ATJ+T is suitable for 6 applications: Multi-Channel Industrial Data Acquisition, Programmable Logic Controller (PLC) Analog Input Module, Patient Monitoring and Medical Instrumentation, Battery-Powered Portable Instrumentation, Sensor Hub and IoT Edge Node, Power Management and Monitoring Systems.
Multi-Channel Industrial Data Acquisition
The MAX11332ATJ+T is ideal for multi-channel industrial data acquisition systems where up to 16 single-ended sensor signals must be digitized with 12-bit precision at multi-kHz aggregate throughput. Its 3 Msps SAR core and integrated 16-to-1 analog multiplexer replace 4 to 8 separate dual-channel ADCs, dramatically reducing PCB area and BOM cost. The 500 kHz full-linear bandwidth supports thermocouple, RTD-conditioned, strain gauge, and 4-20 mA current-loop signals after external conditioning. The post-mux signal conditioning access lets designers place instrumentation amplifiers (e.g., MAX4194) or active filters between the input pins and internal sample-and-hold. External reference input (typically 4.096 V via MAX6126) provides 1 mV LSB resolution. SPI-compatible serial output streams up to 3 Msps to an MCU or FPGA. Compared with discrete multiplexer + ADC architectures, the integrated approach eliminates channel-to-channel skew and reduces settling-time errors.
Recommended
Programmable Logic Controller (PLC) Analog Input Module
The MAX11332ATJ+T fits compact PLC analog input modules with 8 or 16 channels per module. Its 32-pin TQFN-EP (5x5 mm) package provides 16 channels in less than 25 mm2 of board space, freeing area for isolation barriers, digital I/O, and communication interfaces. The 3 Msps throughput supports simultaneous sampling across multiple channels via the integrated mux, while 12-bit resolution satisfies IEC 61131-2 analog input accuracy class requirements for 4-20 mA and 0-10 V industrial signals. The external reference lets designers match input range to sensor scaling, optimizing LSB size for 0.1% measurement resolution. The serial interface simplifies galvanic isolation with digital isolators (e.g., MAX14850) for industrial safety compliance. Power consumption of 5.5 mW at full throughput keeps total module power within PLC backplane budgets, enabling higher channel density per module than competing 14/16-bit ADCs.
Recommended
Patient Monitoring and Medical Instrumentation
The MAX11332ATJ+T suits patient monitoring systems where multiple physiological signals (ECG, SpO2, temperature, respiration) require simultaneous digitization. Its 16 single-ended channels accept signals from front-end analog conditioning circuits for each sensor type, with the integrated multiplexer eliminating per-channel ADC cost. The 500 kHz full-linear bandwidth captures the full spectral content of ECG waveforms (0.05 Hz to 150 Hz fundamental, up to 500 Hz with pacer spikes) without aliasing. SAR architecture provides deterministic latency critical for synchronized multi-channel measurements, unlike delta-sigma ADCs with variable group delay. The external reference allows matching ADC range to bioelectric signal amplitudes (typically +/-5 mV for ECG), maximizing code utilization. SPI interface simplifies connection to medical-grade MCUs. The compact 5x5 mm TQFN-EP package suits portable patient monitors and wearable health devices where board area is at premium.
Recommended
Battery-Powered Portable Instrumentation
The MAX11332ATJ+T is well matched to battery-powered portable instrumentation including handheld multimeters, portable oscilloscopes, and field data loggers. Its low 5.5 mW power consumption at 3 Msps extends battery life compared to 14/16-bit ADCs that consume 20-50 mW. The integrated 16-channel mux eliminates multiple ADC components, reducing total system power and board area. Power-down modes via the serial interface reduce quiescent current to microampere levels between conversions, suitable for duty-cycled battery operation. The 3 Msps throughput handles transient capture requirements of portable scopes and sensor loggers. The wide -40 C to +125 C operating range supports outdoor and industrial field environments. SPI serial interface minimizes MCU pin count, allowing smaller, lower-power microcontrollers in portable designs. The 32-pin TQFN-EP 5x5 mm package fits handheld enclosures with dense analog front-end layouts.
Recommended
Sensor Hub and IoT Edge Node
The MAX11332ATJ+T serves as the analog front-end for IoT edge nodes and sensor hubs aggregating multiple sensor types in smart building, asset tracking, and environmental monitoring applications. Its 16 input channels accept diverse sensor outputs (temperature, humidity, pressure, gas concentration, light, motion) through external signal conditioning. The integrated multiplexer and SAR ADC replace multiple single-channel ADCs, reducing BOM cost and PCB complexity in cost-sensitive IoT designs. The 3 Msps sampling rate supports oversampling techniques to improve effective resolution beyond the native 12 bits for slowly-varying sensor signals. The serial SPI interface connects directly to low-power IoT MCUs (e.g., MAX32660) and wireless SoCs. External reference input allows optimization for sensor-specific full-scale ranges (e.g., 2.5 V for temperature bridges, 5 V for pressure transducers). Low power consumption suits battery or energy-harvesting powered IoT deployments.
Recommended
Power Management and Monitoring Systems
The MAX11332ATJ+T is well suited for power management monitoring in server PSUs, telecom rectifiers, and battery management systems where multiple voltage and current rails require continuous monitoring. Its 16 input channels can simultaneously digitize up to 8 voltage rails and 8 current-sense amplifier outputs, providing complete power telemetry with 12-bit accuracy. The fast 3 Msps sampling rate captures transient events like inrush currents and load steps without aliasing. SAR architecture's deterministic conversion latency is critical for synchronized voltage/current sampling required for accurate power calculations. The external reference (typically 4.096 V) provides a stable measurement scale. SPI interface simplifies connection to power management controllers and digital isolators for high-voltage isolation. The wide operating temperature range supports harsh industrial and automotive power electronics environments.
Recommended
Recommended Products Summary
Engineering reference data for MAX11332ATJ+T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX11331ATJ+T | MAX11324ATJ+T | MAX11321ATJ+T | MAX11329ATJ+T |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | TQFN-32 (5x5 mm) | TQFN-32 (5x5 mm) - same | TQFN-32 (5x5 mm) - same | TQFN-32 (5x5 mm) - same | TQFN-32 (5x5 mm) - same |
| Resolution | 12 bit | 12 bit | 10 bit | 10 bit | 12 bit |
| Sampling Rate | 3 Msps | 3 Msps | 3 Msps | 3 Msps | 3 Msps |
| Input Channels | 8/16 (configurable) | 8/16 (configurable) | 16 | 8 | 8 |
| Architecture | SAR | SAR | SAR | SAR | SAR |
| Reference Type | External | External | External | External | External |
| Interface | Serial SPI | Serial SPI | Serial SPI | Serial SPI | Serial SPI |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
Key Differentiators
- 16 single-ended analog input channels with integrated multiplexer (vs MAX11329ATJ+T (8-channel variant))
- 12-bit no-missing-codes resolution at 3 Msps throughput (vs MAX11321ATJ+T (10-bit variant))
- Post-mux external signal conditioning access (vs MAX11331ATJ+T (same family))
- External reference for flexible input range scaling (vs MAX11331ATJ+T (same family, fixed reference option))
Design Notes
The MAX11332ATJ+T requires clean analog and digital supplies. Estimated: at 3.3V supply and 3 Msps, total current consumption is approximately 1.7 mA (5.5 mW). Place 0.1 uF ceramic decoupling capacitors close to AVDD (pin 18) and DVDD (pin 25) pins, plus a bulk 10 uF tantalum or ceramic capacitor on each supply rail. Use separate analog and digital ground planes joined at a single point near the IC to prevent digital switching noise from coupling into analog input paths.
The exposed thermal pad (pin 32 / EP) MUST be soldered to the PCB ground plane for both electrical ground reference and thermal dissipation. Use a via array (4-9 thermal vias) connecting the pad to internal ground planes for optimal heat spreading. Estimated: with the EP properly soldered to a 1 square inch copper pour on a 4-layer PCB, theta_JA drops to approximately 32 C/W, allowing operation across the full -40 C to +125 C temperature range without thermal limiting.
Route analog input traces (AIN0-AIN15) as differential pairs or guarded traces to minimize crosstalk between channels. Keep analog traces away from digital interface traces (CS, SCLK, DIN, DOUT). Place the external reference bypass capacitor (typically 0.1 uF ceramic in parallel with 10 uF tantalum) within 5 mm of the REF pin (pin 17). Use a low-impedance ground pour under analog input traces to reduce ground loop noise.
Common design pitfalls include: (1) using a noisy or unstable voltage reference - reference noise directly appears as ADC output noise; (2) exceeding VREF input range on analog inputs causes ADC output saturation and possible damage; (3) omitting the REF bypass capacitor results in conversion errors; (4) failing to solder the EP pad causes thermal runaway at high throughput; (5) driving CS high during conversion causes data corruption. Always consult the datasheet timing diagrams for CS setup and hold times relative to SCLK.
For best 12-bit dynamic performance, the analog input source impedance should be below 1 kOhm to allow the internal sample-and-hold to settle within the acquisition time window. Estimated: at 3 Msps with 1 kOhm source impedance, the acquisition time is approximately 83 ns; exceeding this causes gain errors and non-linearity. Use a low-noise, low-drift input buffer amplifier (e.g., MAX4475) for high-impedance sensor sources. Apply dithering techniques when digitizing slowly-varying signals to improve effective resolution beyond 12 bits.
Compliance Information
RoHS and REACH compliant per Analog Devices product page. MSL Level 3 (168-hour floor life) moisture sensitivity rating. Lead-free TQFN-EP package with NiPdAu lead finish. Not AEC-Q100 qualified - this is an industrial/consumer grade part.
