MAX150BEWP+T - 8-Bit 500kSPS ADC w/ Ref & T/H | Maxim
MPN: MAX150BEWP+T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.72 | $8.72 |
| 10 | $7.85 | $78.50 |
| 100 | $6.98 | $698.00 |
| 500 | $6.21 | $3,105.00 |
| 1,000 | $5.54 | $5,540.00 |
MAX150BEWP+T Overview
An ADC (analog-to-digital converter) is a semiconductor that quantifies a continuous analog input voltage into discrete binary codes that a digital processor can read and act on. Half-flash ADCs, like the MAX150 family, use a two-step internal conversion to reduce the number of comparators compared with a full-flash topology while still achieving sub-microsecond conversion times, balancing speed, power, and die area in the broader data-converter hierarchy.
Key features of this part include a maximum 1.34 us conversion time, an internal track-and-hold amplifier that eliminates the need for an external sample-and-hold stage, an internal 2.5 V voltage reference (with optional external-reference override), and a bipolar input range of 0 V to 5 V when the on-chip reference is used. The device supports both single-ended and differential analog input configurations, microprocessor-friendly parallel interface timing, and a power-down mode that reduces supply current for battery-driven applications.
Typical uses for the MAX150BEWP+T include video and imaging digitizers, digital oscilloscope front ends, process-control instrumentation, and audio-bandwidth data acquisition. The combination of an internal reference and track-and-hold makes it attractive for cost-sensitive designs where board area is limited and BOM count must stay low.
When designing with this part, take care to bypass the analog and digital supplies close to the IC pins and to keep analog input traces away from digital clocks. The track-and-hold aperture is fast, so source-impedance budgeting matters for accuracy at high input frequencies.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers select, second-source, and qualify the MAX150BEWP+T for volume designs.
Drop-in alternatives for MAX150BEWP+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 MAX150BEWP+T (same form factor and footprint) — differing in Analog Input Range, Mounting Type, Package, RoHS Status, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX150BEWP+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX150AEWP+T
✅ Drop-In✓ In Stock
$5.78 / Unit
View Datasheet →MX7820KN+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX150BEPP+
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MAX150BEWP+T Maximum Ratings & Electrical Characteristics
| Resolution | 8 bits |
| Sampling Rate | 500 kSPS |
| Conversion Time | 1.34 us (max) |
| Number of Inputs | 1 single-ended (also supports pseudo-differential) |
| Architecture | Half-flash |
| Analog Supply Voltage | +5 V |
| Digital Supply Voltage | +5 V |
| Analog Input Range | 0 V to 5 V (with internal 2.5 V reference, ±5 V span available with external reference) |
| Internal Reference | 2.5 V bandgap |
| Track-and-Hold | Integrated |
| Digital Interface | Parallel, TTL/CMOS compatible |
| Operating Temperature Range | -40C to +85C (industrial) |
| Package | 20-SOIC (0.295 in / 7.50 mm body width) |
| Mounting Type | Surface Mount |
| Terminal Form | Gull-wing |
| RoHS Status | Compliant (T suffix indicates lead-free tape & reel) |
MAX150BEWP+T Pin Configuration
| Pin 1 | VREF — 2.5 V internal reference output / external reference input |
| Pin 2 | GND — Analog ground |
| Pin 3 | IN — Analog input |
| Pin 4 | DGND — Digital ground |
| Pin 5 | CS — Chip select (active low) |
| Pin 6 | RD — Read strobe (active low) |
| Pin 7 | NC — Not connected |
| Pin 8 | DB0 — Data bit 0 (LSB) |
| Pin 9 | DB1 — Data bit 1 |
| Pin 10 | DB2 — Data bit 2 |
| Pin 11 | DB3 — Data bit 3 |
| Pin 12 | DB4 — Data bit 4 |
| Pin 13 | DB5 — Data bit 5 |
| Pin 14 | DB6 — Data bit 6 |
| Pin 15 | DB7 — Data bit 7 (MSB) |
| Pin 16 | AGND — Analog ground (return for input reference) |
| Pin 17 | VCC — +5 V analog supply |
| Pin 18 | DVDD — +5 V digital supply |
| Pin 19 | PWDN — Power-down input (active high) |
| Pin 20 | INT — Conversion complete / interrupt |
Typical Applications
MAX150BEWP+T is suitable for 7 applications: Industrial Process Control Instrumentation, Digital Oscilloscope Front-End Digitizer, Embedded Data Acquisition Systems, Audio-Bandwidth Signal Digitization, Automotive Sensor Signal Conditioning (Legacy 12V Systems), Medical Patient Monitoring Auxiliary Channels, Test & Measurement Bench Instruments.
Industrial Process Control Instrumentation
The MAX150BEWP+T fits industrial process control because its 8-bit resolution over a 0-5 V input span maps directly onto legacy 4-20 mA current-loop signal conditioning and 0-10 V actuator feedback networks. At 500 kSPS it digitizes multiplexed sensor channels fast enough for closed-loop control loops in PLCs and SCADA systems, while the integrated 2.5 V reference simplifies calibration routines. The half-flash architecture keeps conversion latency predictable at 1.34 us, which is critical for deterministic control-loop timing. Designers typically place the ADC after an op-amp buffer and a second-order anti-aliasing filter, reading the parallel data bus directly into an 8-bit microcontroller port. Industrial -40C to +85C temperature grade covers factory-floor environments.
Recommended
Digital Oscilloscope Front-End Digitizer
For a cost-sensitive bench oscilloscope or PC-based scope peripheral, the MAX150BEWP+T serves as the front-end digitizer for sub-100 kHz bandwidth channels. Its 500 kSPS throughput supports real-time sampling for audio and baseband signals, while the internal 2.5 V reference keeps the voltage-per-division scaling stable across temperature. The integrated track-and-hold removes the need for a separate sample-and-hold stage, which would otherwise add error and consume board area. Engineers will pair the ADC with an input-protection resistor network and a programmable-gain amplifier for vertical scaling. The parallel interface streams digitized samples directly into an FPGA or microcontroller buffer for subsequent USB transfer to a host PC.
Recommended
Embedded Data Acquisition Systems
In embedded data acquisition boards and standalone sensor-logging devices, the MAX150BEWP+T provides 8-bit quantization at 500 kSPS with minimal external parts count. The internal reference and track-and-hold keep the BOM to a few bypass capacitors and a connector, ideal for compact OEM modules. The 5 V single-supply operation aligns with standard industrial MCU rails, simplifying power tree design and removing the need for negative rails. Software drivers for the parallel bus are well documented in Maxim application notes, allowing rapid integration with 8051, PIC, AVR, and Cortex-M class microcontrollers. Power-down mode supports battery-friendly duty-cycled sampling in remote monitoring installations.
Recommended
Audio-Bandwidth Signal Digitization
The MAX150BEWP+T is suitable for audio-bandwidth digitization in consumer and prosumer products such as guitar effects pedals, MIDI controllers with audio pass-through, and karaoke mixers. Its 500 kSPS rate comfortably exceeds the 44.1 kSPS Nyquist requirement for 20 kHz audio bandwidth, while the 8-bit resolution is acceptable for pitch-following displays and simple VU-meter style visualizations. The on-chip reference provides stable ADC scaling over temperature, so peak-detection circuits remain accurate. Designers commonly follow the ADC with a small FIFO buffer in the host MCU to reconstruct a continuous sample stream for display or audio-effect processing. Single-supply 5 V operation suits USB-powered gadgets.
Recommended
Automotive Sensor Signal Conditioning (Legacy 12V Systems)
In legacy 12V automotive subsystems - body controllers, lighting modules, HVAC controls - the MAX150BEWP+T digitizes analog sensor inputs such as thermistors, potentiometers, and current-sense amplifiers. Its half-flash architecture offers predictable, deterministic conversion latency, simplifying software design under tight interrupt deadlines. The internal reference removes the need for a precision external 2.5 V source, lowering total cost in price-sensitive automotive aftermarket and service-replacement applications. Design tip: place reverse-polarity and load-dump protection ahead of the 5 V regulator that feeds the ADC, and isolate the digital and analog supply pins with ferrite beads to reject automotive bus noise. Designers should verify temperature grade against the vehicle cabin environment.
Recommended
Medical Patient Monitoring Auxiliary Channels
The MAX150BEWP+T supports auxiliary channel digitization in non-critical medical monitoring equipment, such as bedside patient-status displays, bedside lamp controllers, and nurse-call panels. Its 500 kSPS throughput easily handles auxiliary temperature, humidity, and battery-voltage telemetry channels alongside the main front-end ADC. The integrated reference and track-and-hold simplify the analog signal chain, reducing PCB area in compact medical devices where every square millimeter counts. Designers will typically isolate the ADC ground reference carefully from digital switching currents to preserve full-scale accuracy on low-amplitude signals. Confirm compliance with IEC 60601 if the ADC feeds any patient-contacting signal path.
Recommended
Test & Measurement Bench Instruments
The MAX150BEWP+T is widely used in low-cost bench instruments such as handheld multimeter digitizer sections, signal source amplitude readback, and laboratory data loggers. Its 8-bit resolution over a 0-5 V span aligns with typical measurement readouts (resolution ~19.5 mV / LSB) before scaling and unit conversion. The internal 2.5 V reference provides accurate analog-to-digital scaling without an expensive external voltage reference, ideal for cost-contained T&M designs. Engineers commonly route the parallel output into an LCD driver or an MCU display controller for direct numeric display. The 20-SOIC wide-body package aids heat dissipation and simplifies hand-rework during prototyping.
Recommended
Recommended Products Summary
Engineering reference data for MAX150BEWP+T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX150BEWP+ | MAX150AEWP+T | MX7820KN+ | MAX150BEPP+ |
|---|---|---|---|---|---|
| Brand | Maxim Integrated (now Analog Devices) | Maxim Integrated (now Analog Devices) | Maxim Integrated (now Analog Devices) | Maxim Integrated (now Analog Devices) | Maxim Integrated (now Analog Devices) |
| Package | 20-SOIC (7.50 mm) | 20-SOIC (7.50 mm) - same | 20-SOIC (7.50 mm) - same | 20-SOIC (7.50 mm) - same | 20-PDIP - different footprint |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits |
| Sampling Rate | 500 kSPS | 500 kSPS | 500 kSPS (A-grade speed) | 500 kSPS | 500 kSPS |
| Conversion Time | 1.34 us | 1.34 us | 1.34 us | 1.34 us | 1.34 us |
| Architecture | Half-flash | Half-flash | Half-flash | Half-flash | Half-flash |
| Internal Reference | 2.5 V bandgap | 2.5 V bandgap | 2.5 V bandgap | 2.5 V bandgap | 2.5 V bandgap |
| Supply Voltage | +5 V | +5 V | +5 V | +5 V | +5 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | 0C to +70C (commercial) | -40C to +85C |
| Package Type | SMD (SOIC) | SMD (SOIC) | SMD (SOIC) | SMD (SOIC) | Through-hole (PDIP) |
Key Differentiators
- Tape-and-reel packaging for high-volume SMT lines (vs MAX150BEWP+)
- Highest linearity grade within the MAX150 family (vs MAX150AEWP+T)
- Wider industrial temperature range than legacy MX7820 (vs MX7820KN+)
- Surface-mount 20-SOIC footprint (vs MAX150BEPP+)
Design Notes
The MAX150BEWP+T operates from a single +5 V supply and pulls approximately 25 mW during active conversion. Place a 10 uF tantalum and 0.1 uF ceramic bypass capacitor pair as close as possible to the VCC and DVDD pins to suppress switching transients during sampling. The internal reference draws current during conversion, so decoupling quality directly influences AC accuracy and INL at sub-LSB levels. Use a star-ground topology that returns analog and digital grounds to a single point near the IC for low-noise designs.
Route the analog input trace away from digital output bus lines and clock signals to minimize digital-noise coupling into the ADC input. If source impedance exceeds 1 kohm, buffer the input with an op-amp such as the MAX4165 to prevent conversion-time errors caused by track-and-hold aperture uncertainty. Keep the analog input trace short and guard it with a ground pour on both sides. If the host microcontroller reads the bus at high frequency, place 100 ohm series resistors on each digital data line near the ADC end to dampen reflections on the parallel bus.
Do not drive the analog input above the supply rail, because the input clamps diodes on the IC will forward-bias and inject charge that disrupts track-and-hold operation. Avoid using long analog-input traces in parallel with switching power inductors or transformers, since the resulting common-mode injection can saturate the input stage. When using the internal 2.5 V reference, do not drive heavy loads from VREF (REF pin), or the reference voltage will droop and INL will degrade. For absolute-accuracy applications, overdrive the internal reference with a precision external 2.5 V source.
When the parallel data bus switches at high speed, the resulting ground bounce can inject noise into the analog input. Add 100 ohm series resistors on DB0-DB7 to limit di/dt slew, and keep the digital bus trace length matched within 5 mm to avoid setup-time mismatches at the host MCU. Consider adding a small RC snubber (10 ohm + 33 pF) on the RD strobe pin to control edge rate if ringing is observed on a high-speed bus. Verify the CS-to-RD timing against the latest datasheet revision before finalizing firmware timing.
Compliance Information
T-suffix indicates lead-free and RoHS-compliant lead termination per Maxim Integrated standard product declarations. AEC-Q100 qualification is not available on the MAX150 family; select AEC-Q100 qualified parts from current Analog Devices portfolios for automotive safety-critical applications.
