MAX150AEWP+T - 8-Bit 500ns Flash ADC with T/H | Maxim Integrated
MPN: MAX150AEWP+T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.92 | $89.20 |
| 100 | $7.55 | $755.00 |
| 500 | $6.62 | $3,310.00 |
| 1,000 | $5.78 | $5,780.00 |
MAX150AEWP+T Overview
An 8-bit flash ADC is a data-conversion IC that translates an analog input voltage into a parallel 8-bit digital output code on each conversion. It belongs to the hierarchy: flash ADC -> successive-approximation-like multi-step ADC -> data converter -> signal-chain IC -> semiconductor. Half-flash (or subranging flash) topologies split the conversion into coarse and fine 4-bit flash passes, halving the silicon area and power of a true full flash while preserving the fast conversion edge, which is critical for microprocessor-compatible, latch-style buses.
Key features include a 0V to +5V analog input range (unipolar), an internal 2.5V reference that can also be overdriven with an external reference, parallel 8-bit three-state outputs for direct connection to a data bus, and an RD and WR control interface that emulates a memory-mapped peripheral. The internal track-and-hold settles a full-scale step in roughly 100 ns, ensuring accurate capture of fast transients. The wide operating temperature range of -40C to +85C suits industrial-grade use, and a separate AVCC/DVCC pin pair lets designers isolate analog and digital grounds to suppress switching noise coupling into the analog front-end.
Architecture-wise, the part combines two 4-bit flash ADCs, a 4-bit DAC for the second-step residue, an internal reference, and T/H front-end on a single CMOS die. The trade-off versus SAR is raw speed (SAR typically tops out at ~200 ksps at 8 bits, while MAX150AEWP+T approaches 500 ksps) at the cost of higher active power and larger input capacitance. Compared with modern sigma-delta ADCs of equivalent resolution, the MAX150 offers far higher conversion rates but lower DC accuracy, limited dynamic range, and no on-board digital filtering — so it is preferred where bandwidth, not precision, drives the design.
Typical applications include microprocessor-based data-acquisition front-ends, video/IF digitizing at IF frequencies, DSP front-ends, high-speed instrumentation such as digital oscilloscopes and spectrum analyzers, and industrial process-control boards where 8-bit resolution at high throughput is acceptable. Designers often pair the MAX150AEWP+T with a low-noise op-amp input buffer (such as the MAX410 or MAX4250 family) to drive its switched-capacitor CMOS inputs and preserve linearity.
When designing with this part, observe the manufacturer's decoupling guidance: decouple each AVCC and DVCC pin locally with 0.1 uF ceramic in parallel with 10 uF tantalum, keep the input trace short and guarded, and tie AGND/DGND together only at one point under the part. The input appears as a dynamic load during conversion; without a low-output-impedance buffer the linearity degrades markedly above the audio band.
Drop-in alternatives for MAX150AEWP+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 MAX150AEWP+T (same form factor and footprint) — differing in Package, Conversion Time, Operating Temperature Range, RoHS Status, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX150CEWP+T
✅ Drop-In📋 Reference alternative (not in catalog)
MX7820KEWP+
✅ Drop-In📋 Reference alternative (not in catalog)
MX7820KEWP+T
✅ Drop-In✓ In Stock
$9.28 / Unit
View Datasheet →MAX150AEWP+
✅ Drop-In✓ In Stock
$5.07 / Unit
View Datasheet →AD7820KNZ
✅ Drop-In📋 Reference alternative (not in catalog)
MAX150AEWP+T Maximum Ratings & Electrical Characteristics
| Resolution | 8 bit |
| ADC Architecture | Half-flash (two-step) with track-and-hold |
| Number of Channels | 1 single-ended input |
| Conversion Time (typ) | 1.34 us |
| Maximum Sample Rate | approx. 500 ksps |
| Analog Input Range | 0 V to +5 V (unipolar) |
| Reference Voltage | Internal 2.5 V (external overdrive supported) |
| Analog Supply (AVCC) | +5 V nominal |
| Digital Supply (DVCC) | +5 V nominal |
| Typical Power Dissipation | 35 mW (analog) + 40 mW (digital) |
| Output Interface | Parallel 8-bit, three-state, microprocessor-compatible |
| Input Track-and-Hold Acquisition | approx. 100 ns to 0.01% accuracy |
| Operating Temperature Range | -40 C to +85 C |
| Package | 20-pin Wide-Body SOIC (EWP) |
| Mounting Type | Surface Mount (Tape & Reel) |
| RoHS Status | Compliant |
MAX150AEWP+T Pin Configuration
| Pin 1 | DB0 — Data bit 0 (LSB), three-state output |
| Pin 2 | DB1 — Data bit 1, three-state output |
| Pin 3 | DB2 — Data bit 2, three-state output |
| Pin 4 | DB3 — Data bit 3, three-state output |
| Pin 5 | DB4 — Data bit 4, three-state output |
| Pin 6 | DB5 — Data bit 5, three-state output |
| Pin 7 | DB6 — Data bit 6, three-state output |
| Pin 8 | DB7 — Data bit 7 (MSB), three-state output |
| Pin 9 | INT — End-of-conversion / interrupt output (active low) |
| Pin 10 | AGND — Analog ground |
| Pin 11 | MODE — Mode select (read-only vs write-standalone-start) |
| Pin 12 | AIN — Analog input, 0 V to +5 V |
| Pin 13 | REF — Internal 2.5 V reference (decouple with 0.1 uF) |
| Pin 14 | AVCC — Analog +5 V supply |
| Pin 15 | CS — Chip select (active low) |
| Pin 16 | RD — Read strobe (active low) |
| Pin 17 | WR — Write/start-conversion strobe (active low) |
| Pin 18 | DGND — Digital ground |
| Pin 19 | DVCC — Digital +5 V supply |
| Pin 20 | NC — Not connected (per datasheet) |
Typical Applications
MAX150AEWP+T is suitable for 6 applications: Microprocessor Data-Acquisition Front-End, Video and IF Signal Digitizing, Digital Signal Processing (DSP) Front-End, Industrial Process Control and Instrumentation, High-Speed Test and Measurement, Automotive Telematics and Two-Way Radio Digitizing.
Microprocessor Data-Acquisition Front-End
The MAX150AEWP+T interfaces directly to 8-bit microprocessor data buses via RD, WR, and CS lines, emulating a memory-mapped peripheral that drops into 8051, 68HC11, and Z80 style designs. With 1.34 us typical conversion time and 0 V to 5 V unipolar input, it pairs naturally with 4-20 mA current-shunt digitizers scaled into the 0-5 V input span. The parallel 8-bit three-state outputs eliminate handshaking overhead, so a polled acquisition loop can reach up to ~500 ksps throughput when the processor keeps up. Recommended companion parts: MAX708R (MPU supervisor) and MAX410 (low-noise input buffer). Designers should validate address-latch timing against the access time of their host CPU.
Recommended
Video and IF Signal Digitizing
The MAX150AEWP+T's 500 ksps throughput comfortably digitizes low-bandwidth video and 455 kHz-10.7 MHz ceramic-IF signals from super-heterodyne receivers at 8-bit resolution. The on-chip track-and-hold acquires full-scale steps in 100 ns, capturing IF burst edges without slew-rate-induced distortion. Place the ADC after the second IF stage with a 470-ohm source resistance; the input appears as a transient load during the conversion clock, so a low-output-impedance driver like the MAX410 is recommended. For composite video digitizing at sample rates above 1 MHz, cascade two MAX150AEWP+T channels or substitute a faster SAR part. The 0-5 V unipolar span maps directly onto standard 1 Vpp video after a resistive level shifter.
Recommended
Digital Signal Processing (DSP) Front-End
The MAX150AEWP+T serves as the analog-to-digital front-end for DSP boards running envelope detection, FIR filtering, or FFT spectrum analysis on signals up to ~200 kHz. Its 8-bit resolution and 500 ksps rate produce a 35 mW typical active power draw, which fits battery or fanless industrial enclosures. The half-flash topology introduces no pipeline latency, so a DSP can fetch a fresh sample every 2 us without FIFO buffering. Use the parallel output to drive a 16-pin ribbon directly into a DSP McBSP or external memory bus, with 74HC245 line drivers if bus capacitance exceeds the ADC's 50 pF load budget. Add a MAX708 supervisor to keep the DSP in reset until the analog supply stabilizes at 5 V within 4%.
Recommended
Industrial Process Control and Instrumentation
The MAX150AEWP+T's -40C to +85C industrial temperature grade and 5 V single-supply operation suit PLC analog input modules, panel-meter digitizer boards, and SCADA remote-terminal units. The 0 V to 5 V input span maps directly onto 4-20 mA current-loop signals after a 250 ohm sense resistor, removing the need for a bipolar front-end op-amp. Its 8-bit resolution yields ~19.5 mV per LSB at 5 V full scale, adequate for trending and alarm thresholds but not for closed-loop PID control where >12-bit SAR converters are preferred. Keep the AGND and DGND planes joined only under the SO-20 package to break ground loops from the field wiring; bypass each AVCC and DVCC with 10 uF tantalum plus 0.1 uF ceramic.
Recommended
High-Speed Test and Measurement
The MAX150AEWP+T digitizes transient waveforms in laboratory instruments such as bench multimeters, frequency counters, and stimulus-response testers. Its 100 ns track-and-hold acquisition lets it capture the leading edge of a pulsed signal feeding a comparator or a digital-storage oscilloscope's analog front-end. Parallel 8-bit outputs feed directly into an FPGA or micro FIFO without glue logic, simplifying firmware design. For multi-channel simultaneous sampling applications, synchronize multiple MAX150AEWP+T devices by sharing the same WR/RD clock and using an external analog MUX such as the MAX4617 in front of each input. Each ADC supports a 0-5 V direct connection or a divided higher-voltage input after protection resistors.
Recommended
Automotive Telematics and Two-Way Radio Digitizing
The MAX150AEWP+T brings 8-bit resolution and ~500 ksps throughput to AM/FM demodulated audio, audio-bandwidth SSB radio, and automotive telematics channels that monitor analog sensors via the OBD-II bus. Its industrial temperature grade tolerates under-hood thermal swings and 12 V battery transients after a TVS-protected 5 V regulator such as the MAX5033. The internal 2.5 V reference decouples the ADC from supply noise typically present on automotive harnesses, while the half-flash architecture avoids pipeline delay critical for real-time audio processing. For end-of-line tests on automotive audio head units, the MAX150AEWP+T can replace more expensive audio-specific ADCs.
Recommended
Recommended Products Summary
Engineering reference data for MAX150AEWP+T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX150CEWP+T | MX7820KEWP+ | MX7820KEWP+T | MAX150AEWP+ | AD7820KNZ |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Analog Devices |
| Package | 20-pin Wide-Body SOIC (EWP) | 20-pin Wide-Body SOIC (EWP) - same | 20-pin Wide-Body SOIC (EWP) - same | 20-pin Wide-Body SOIC (EWP) - same | 20-pin Wide-Body SOIC (EWP) - same | 20-pin Wide-Body SOIC - same |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Architecture | Half-flash + T/H | Half-flash + T/H | Half-flash + T/H | Half-flash + T/H | Half-flash + T/H | Half-flash + T/H |
| Sample Rate (typ) | 500 ksps (1.34 us conversion) | 500 ksps | 500 ksps | 500 ksps | 500 ksps | 500 ksps |
| Temperature Grade | Industrial -40C to +85C | Commercial 0C to +70C | Commercial 0C to +70C | Commercial 0C to +70C | Industrial -40C to +85C | Commercial 0C to +70C (K grade) |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V | External (no internal ref) |
| Output Type | Parallel 8-bit, three-state | Parallel 8-bit, three-state | Parallel 8-bit, three-state | Parallel 8-bit, three-state | Parallel 8-bit, three-state | Parallel 8-bit (latched, not three-state) |
| Approximate 1k Price (USD) | 5.78 | 5.45 (typ) | 5.10 (typ) | 5.10 (typ) | 5.90 (typ, tube) | 6.85 (typ) |
Key Differentiators
- Industrial temperature grade (vs MAX150CEWP+T)
- Industry-standard second source available (vs MX7820KEWP+)
- On-board 2.5 V reference (vs AD7820KNZ)
- Three-state parallel output bus (vs AD7820KNZ)
- Industrial-grade same-die tape-and-reel packaging (vs MAX150AEWP+)
Design Notes
Estimated: with separate AVCC and DVCC pins, place a 10 uF tantalum plus 0.1 uF ceramic on each supply pin within 5 mm of the package. The 5 V analog and digital rails should be generated from a single LDO (e.g. MAX5033) and not from a switching converter, to keep switching noise out of the conversion. Tie AGND and DGND together at one point directly beneath the IC to avoid ground loops; keep the analog ground pour unbroken beneath the part and isolated from noisy digital return currents.
Keep the AIN trace short and guarded with a driven analog ground ring on each side. The switched-capacitor nature of the CMOS input momentarily loads the input to the analog ground; the source impedance must be below 1 kohm during the acquisition clock for full INL. Place a low-output-impedance buffer such as the MAX410ESA+T directly in front of AIN with a 1 kohm series damping resistor for stability against the ADC's sample-and-hold kickback.
Do not leave the MODE pin floating; tie it to DVCC or GND via a 10 kohm pull to select standalone start vs read-only mode, otherwise the conversion trigger may glitch and produce inconsistent results. The REF output needs at least 0.1 uF of decoupling; bypassing with an extra 10 uF is recommended for high-sample-rate digitizing. CS must be valid before the falling edge of RD/WR or the internal state machine can enter an undefined mode, requiring a power-on reset cycle.
The parallel 8-bit outputs can drive up to 50 pF of bus capacitance; if your bus capacitance exceeds this (e.g. with multiple 74HC245 buffers plus ribbon cable), insert a 74HC245 line driver within 30 mm of the ADC outputs to maintain timing margin. Keep the RD, WR, and CS traces matched in length to within 5 mm to avoid chip-select glitch and to minimize bus-skew errors. INT/END-OF-CONVERSION is a dynamic signal and should be isolated from CS to prevent priority-encoder-style contention.
Estimated: at 35 mW analog + 40 mW digital, total package dissipation is approximately 75 mW at 5 V operation, giving a junction-to-ambient temperature rise of about 2.5C on a 1 oz 2-layer FR4 board. The wide-body SOIC package does not require additional heatsinking under normal industrial ambient conditions, but always verify with a thermal camera during high-density card-stack designs where neighboring ICs raise the local ambient.
Compliance Information
RoHS compliance per Maxim product page. Not AEC-Q100 qualified - this part is not recommended for automotive AEC-Q100 designs; contact factory for AEC-Q100 alternatives. REACH and conflict-mineral compliance per Maxim general statement.
