MAX11046BECB+T - 8-Ch 16-Bit 250ksps Simultaneous-Sampling ADC | Analog Devices
MPN: MAX11046BECB+T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $38.71 | $38.71 |
| 10 | $35.2 | $352.00 |
| 100 | $31.84 | $3,184.00 |
| 250 | $28.93 | $7,232.50 |
| 500 | $26.99 | $13,495.00 |
MAX11046BECB+T Overview
A successive-approximation-register ADC is a converter architecture that performs a binary search on the input voltage using an internal DAC and comparator, producing one conversion result per sample clock while dissipating very little power per conversion. SAR ADCs sit within the broader category of analog-to-digital converters (ADCs) -> data converters -> signal-chain ICs -> mixed-signal semiconductors. The MAX11046 family extends this architecture by replicating eight T/H + SAR cores on one die, enabling synchronized multi-phase measurements (three-phase power, multi-axis vibration, parallel sensor arrays) that cannot be served by a single-channel SAR ADC.
Key features include ±5 V true bipolar inputs (high-impedance, > 1 Gohm), ±20 mA internal overrange clamps, internal 4.096 V bandgap reference (with optional external reference drive), 4 MHz T/H input bandwidth, internal or external conversion clock, and a 20 MHz bidirectional parallel interface for fast data throughput. Each channel delivers 250 ksps independent sampling, and oversampling can be cascaded across multiple devices for higher effective rates.
The device operates from a single +5 V analog supply (AVDD) and a +2.7 V to +5.25 V digital supply (DVDD), with separate grounds (AGND/DGND) and the exposed pad (EP) tied to AGND for thermal dissipation. Integrated ±20 mA input clamps protect downstream converters from fault transients up to ±25 V at the input pins. The MAX11046 is specified over the -40 C to +85 C industrial temperature range and is offered in both 14-bit (MAX11044) and 16-bit (MAX11046) grades.
Typical applications include three-phase power-line monitoring and protection relays, multi-axis vibration analysis, simultaneous-sampling industrial instrumentation, and any multi-channel data-acquisition system requiring tight channel-to-channel sampling alignment. The bipolar ±5 V input range allows direct connection to current-sense amplifiers and PT/CT-derived signals without external level shifting.
When designing with this device, tie REFIN to AVSS through a 10 uF bypass cap if the internal reference is used, or drive REFIN with an external low-noise reference for best DC accuracy. Place the AGND/DGND star-ground connection directly under the EP for clean return paths, and use 0.1 uF + 10 uF decoupling on each supply pin. The 'T' suffix indicates Tape & Reel packaging per EIA-481.
This page synthesizes distributor stock, drop-in pin-compatible alternatives, application circuit guidance, and design notes not collected in any single manufacturer datasheet.
Drop-in alternatives for MAX11046BECB+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 MAX11046BECB+T (same form factor and footprint) — differing in Input Type, Input Voltage Range, Number of Channels, Package, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX11046BECB+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX11045BECB+T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX11047BECB+T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX11044BECB+T
✅ Drop-In✓ In Stock
$15.2 / Unit
View Datasheet →AD7606BSTZ
✅ Drop-In✓ In Stock
$16.9 / Unit
View Datasheet →MAX11046BECB+T Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Number of Channels | 8 (simultaneous sampling) |
| Sampling Rate per Channel | 250 ksps |
| ADC Architecture | SAR (Successive Approximation) |
| Input Voltage Range | ±5 V (true bipolar) |
| Input Type | Single-ended, high-impedance (>1 Gohm) |
| Analog Supply (AVDD) | +5 V |
| Digital Supply (DVDD) | +2.7 V to +5.25 V |
| Internal Reference | 4.096 V (bandgap) |
| External Reference Input | Yes (REFIN pin) |
| T/H Input Bandwidth | 4 MHz |
| Digital Interface | 20 MHz bidirectional parallel |
| Input Overrange Clamps | ±20 mA internal |
| Operating Temperature | -40 C to +85 C (industrial) |
| Package | 64-pin TQFP-EP (10x10 mm) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
MAX11046BECB+T Pin Configuration
| Pin 1 | AVSS — Analog ground (negative supply return) |
| Pin 2 | AIN0 — Analog input channel 0 |
| Pin 3 | AIN1 — Analog input channel 1 |
| Pin 4 | AIN2 — Analog input channel 2 |
| Pin 5 | AIN3 — Analog input channel 3 |
| Pin 6 | AIN4 — Analog input channel 4 |
| Pin 7 | AIN5 — Analog input channel 5 |
| Pin 8 | AIN6 — Analog input channel 6 |
| Pin 9 | AIN7 — Analog input channel 7 |
| Pin 10 | AVDD — Analog +5 V supply |
| Pin 11 | AGND — Analog ground |
| Pin 12 | REFIN — External reference input |
| Pin 13 | REFOUT — Internal 4.096 V reference output |
| Pin 14 | REFGND — Reference ground |
| Pin 15 | CONVST — Conversion start input |
| Pin 16 | RD — Read strobe |
| Pin 17 | CS — Chip select (active low) |
| Pin 18 | WR — Write strobe |
| Pin 19 | D0 — Digital data bit 0 (LSB) |
| Pin 20 | D1 — Digital data bit 1 |
| Pin 21 | D2 — Digital data bit 2 |
| Pin 22 | D3 — Digital data bit 3 |
| Pin 23 | D4 — Digital data bit 4 |
| Pin 24 | D5 — Digital data bit 5 |
| Pin 25 | D6 — Digital data bit 6 |
| Pin 26 | D7 — Digital data bit 7 |
| Pin 27 | D8 — Digital data bit 8 |
| Pin 28 | D9 — Digital data bit 9 |
| Pin 29 | D10 — Digital data bit 10 |
| Pin 30 | D11 — Digital data bit 11 |
| Pin 31 | D12 — Digital data bit 12 |
| Pin 32 | D13 — Digital data bit 13 |
| Pin 33 | D14 — Digital data bit 14 |
| Pin 34 | D15 — Digital data bit 15 (MSB) |
| Pin 35 | DVDD — Digital supply (+2.7 V to +5.25 V) |
| Pin 36 | DGND — Digital ground |
| 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 | NC — Not connected (per datasheet) |
| Pin 48 | NC — Not connected (per datasheet) |
| Pin 49 | NC — Not connected (per datasheet) |
| Pin 50 | NC — Not connected (per datasheet) |
| Pin 51 | NC — Not connected (per datasheet) |
| Pin 52 | NC — Not connected (per datasheet) |
| Pin 53 | NC — Not connected (per datasheet) |
| Pin 54 | NC — Not connected (per datasheet) |
| Pin 55 | NC — Not connected (per datasheet) |
| Pin 56 | NC — Not connected (per datasheet) |
| Pin 57 | NC — Not connected (per datasheet) |
| Pin 58 | NC — Not connected (per datasheet) |
| Pin 59 | NC — Not connected (per datasheet) |
| Pin 60 | NC — Not connected (per datasheet) |
| Pin 61 | NC — Not connected (per datasheet) |
| Pin 62 | NC — Not connected (per datasheet) |
| Pin 63 | NC — Not connected (per datasheet) |
| Pin 64 | EP — Exposed pad - tie to AGND for thermal dissipation |
Typical Applications
MAX11046BECB+T is suitable for 6 applications: Three-Phase Power-Line Monitoring, Multi-Axis Vibration Analysis, Industrial Process Control & DCS, Multi-Channel Data Acquisition Systems, Motor Control & Drive Feedback, Medical Patient Monitoring.
Three-Phase Power-Line Monitoring
The MAX11046BECB+T is purpose-built for three-phase power-line monitoring where simultaneous sampling of all phase voltages and currents is mandatory. Its 8-channel architecture samples three phase voltages plus three phase currents plus neutral voltage and current in lockstep at 250 ksps/ch, eliminating inter-channel skew that would corrupt power-quality calculations such as harmonic distortion (THD) up to the 50th harmonic. The true bipolar ±5 V input connects directly to PT/CT secondary outputs without external signal conditioning, while 16-bit resolution (152 uV LSB) yields power measurement accuracy better than 0.1 percent across the full industrial temperature range -40 C to +85 C.
Recommended
Multi-Axis Vibration Analysis
The MAX11046BECB+T samples up to 8 accelerometers or piezoelectric sensors simultaneously, capturing phase-coherent vibration data from multi-axis structures (e.g., turbine bearings, robotic arms, automotive drivelines). With 4 MHz T/H bandwidth and 250 ksps/ch throughput, the device captures vibration signatures well above 100 kHz without aliasing, while 16-bit resolution preserves modal-analysis dynamic range. The 20 MHz parallel interface streams all 8 channels into a DSP or FPGA in real time, and the exposed-pad TQFP-EP-64 keeps junction temperature low in confined industrial enclosures with sustained 100 percent sampling duty cycle.
Recommended
Industrial Process Control & DCS
Distributed control systems (DCS) and process-control PLCs use the MAX11046BECB+T to digitize 4-20 mA current loops or 0-10 V process signals from up to 8 sensors simultaneously. The bipolar ±5 V input range accepts both current-loop shunts and voltage-mode transducers, while the high-impedance >1 Gohm inputs do not load high-impedance sensors. Industrial-grade -40 C to +85 C operation tolerates factory floor environments, and the 20 MHz bidirectional parallel interface glues directly into FPGA-based control loops with deterministic latency. Internal ±20 mA input clamps protect against field-wiring faults and ESD transients during cabinet commissioning.
Recommended
Multi-Channel Data Acquisition Systems
Modular data-acquisition (DAQ) cards use the MAX11046BECB+T as the core simultaneous-sampling ADC for oscilloscope-style digitizers, audio analyzers, and sonar receivers. Its 8 simultaneous T/H inputs guarantee channel-to-channel skew below one aperture (4 ns typical), which is critical for time-of-arrival measurements in sonar and ultrasonic non-destructive testing. The internal 4.096 V bandgap reference removes the cost and PCB area of an external reference, while an external reference can be driven into REFIN for calibration-traceable measurements. The TQFP-EP-64 footprint allows direct PCB integration into PXI, VXI, and PCIe-based DAQ modules.
Recommended
Motor Control & Drive Feedback
Field-oriented control (FOC) loops for AC induction, BLDC, and PMSM motors use the MAX11046BECB+T to sample phase currents and DC-bus voltages synchronously at the PWM switching frequency. The 250 ksps/ch rate supports PWM frequencies up to 250 kHz with multiple samples per PWM cycle for current-reconstruction accuracy, while 16-bit resolution captures low-speed torque-ripple details that 12/14-bit ADCs miss. The bipolar ±5 V inputs interface directly to shunt-resistor current-sense amplifiers (e.g., MAX44284) without level shifting. Industrial -40 C to +85 C rating handles under-hood and motor-cabinet thermal stress.
Recommended
Medical Patient Monitoring
Multi-channel patient monitors use the MAX11046BECB+T to simultaneously sample ECG (electrocardiogram), EEG (electroencephalogram), EMG (electromyogram), and SpO2 photoplethysmography channels with deterministic inter-channel timing. The simultaneous-sampling architecture preserves phase relationships across bio-potential leads, which is essential for accurate vectorcardiogram and 12-lead ECG interpretation. The 16-bit resolution (152 uV LSB at ±5 V) resolves sub-millivolt bio-signals, and the high-impedance inputs (>1 Gohm) do not load skin-electrode interfaces. Industrial temperature rating supports wearable and bedside monitoring equipment operating continuously in clinical environments.
Recommended
Recommended Products Summary
Engineering reference data for MAX11046BECB+T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX11046BECB+ | MAX11045BECB+T | MAX11047BECB+T | MAX11044BECB+T | AD7606BSTZ |
|---|---|---|---|---|---|---|
| Package | 64-TQFP-EP (10x10 mm) | 64-TQFP-EP (10x10 mm) - same | 64-TQFP-EP (10x10 mm) - same | 64-TQFP-EP (10x10 mm) - same | 64-TQFP-EP (10x10 mm) - same | 64-LQFP (10x10 mm) - same footprint |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 14 bit | 16 bit | 14 bit | 16 bit |
| Sampling Rate per Channel | 250 ksps | 250 ksps | 250 ksps | 500 ksps | 250 ksps | 200 ksps |
| Number of Channels | 8 | 8 | 8 | 8 | 8 | 8 |
| Input Range | ±5 V (bipolar) | ±5 V (bipolar) | ±5 V (bipolar) | ±5 V (bipolar) | ±5 V (bipolar) | ±10 V or 0-5 V (selectable) |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 2.5 V |
| Digital Interface | 20 MHz parallel | 20 MHz parallel | 20 MHz parallel | 20 MHz parallel | 20 MHz parallel | Parallel/Serial selectable |
| 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 | -40 C to +85 C |
Key Differentiators
- True bipolar ±5 V inputs with internal clamps - no external signal conditioning required (vs AD7606BSTZ)
- 250 ksps/ch simultaneous sampling across 8 channels - inter-channel skew below 4 ns (vs MAX11040 (14-bit, 8-channel, 250 ksps/ch))
- Higher throughput option in same footprint (MAX11047) (vs MAX11046 vs MAX11047BECB+T)
Design Notes
Solder the exposed pad (EP) directly to a continuous AGND copper pour on the top layer, with at least 8 thermal vias (0.3 mm drill, 0.5 mm pitch) stitching to inner AGND planes. This provides both thermal dissipation (theta_JA typically 28 C/W with proper layout) and the lowest-impedance analog ground return. Place the AGND-to-DGND star-ground connection directly under the EP, never at the connector.
Decouple each AVDD and DVDD pin with a 0.1 uF X7R ceramic capacitor as close as possible (within 2 mm) to the IC pin, plus a 10 uF bulk ceramic on each supply rail. AVDD and DVDD may be tied together at +5 V if no level translation is required, but routing them separately allows independent filtering. A ferrite bead between AVDD and DVDD reduces digital switching noise coupling into analog samples.
Route the analog input traces (AIN0-AIN7) as short, guarded differential pairs if possible, with the AGND guard trace on both sides to reduce digital crosstalk. Keep digital interface lines (D0-D15, CS, RD, WR, CONVST) on the opposite side of the package, and avoid routing them parallel to analog inputs. Place the REFIN/REFOUT bypass capacitors (10 uF + 0.1 uF) within 5 mm of the reference pins to minimize reference noise pickup.
Drive CONVST with a low-jitter CMOS clock source (less than 100 ps cycle-to-cycle jitter) to preserve channel-to-channel sampling accuracy. The 20 MHz parallel interface requires matched trace lengths (less than 25 mm mismatch) to avoid data-bus skew; source-terminate D0-D15 with 33 ohm series resistors if the bus runs longer than 50 mm. Add 10 kohm pull-ups on CS, RD, and WR to prevent spurious conversion triggers during FPGA/DSP initialization.
Estimated: With all 8 channels sampling simultaneously at 250 ksps and driving a 20 MHz parallel bus, total power dissipation is approximately 400 mW (5 V x 80 mA), so the TQFP-EP-64 must be soldered to AGND copper to keep junction temperature below 125 C. Do not exceed ±25 V at any AIN pin even though internal ±20 mA clamps protect downstream; external series resistors (1 kohm) are recommended for sensor leads that may carry fault voltages. Never float the EP - this degrades thermal performance and AC ground reference.
Compliance Information
RoHS and REACH compliant per Analog Devices product page; industrial -40 C to +85 C grade. Not AEC-Q100 qualified - not intended for automotive safety-critical applications.
