MAX150BEPP - 8-Bit 1.3µs ADC with Reference, DIP-20 | Maxim
N.º de pieza: MAX150BEPP ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $30.35 | $30,35 |
| 10 | $27.12 | $271,20 |
| 100 | $22.5 | $2.250,00 |
| 500 | $19.2 | $9.600,00 |
| 1.000 | $17.4 | $17.400,00 |
MAX150BEPP Descripción general
An ADC (Analog-to-Digital Converter) is a data-conversion semiconductor that samples a continuous analog voltage and produces a discrete digital code, enabling microcontrollers, DSPs, or FPGAs to process real-world signals. The MAX150BEPP occupies the hierarchy of successive-approximation and flash mid-speed converters used in instrumentation, motor control, and process-control systems where sub-2 µs throughput and 8-bit (0.4% FSR) accuracy are sufficient.
Key features include ±1 LSB INL and DNL, an internal 2.5 V reference with ±0.5% accuracy, a track-and-hold bandwidth that supports signals well above the Nyquist frequency for full-scale sine inputs, a power-down mode that drops quiescent current to typical low-microamp levels, and 8 three-state digital outputs that share the same bus as the host microprocessor. The internal reference eliminates the external reference-and-buffer network often required by older flash ADCs, simplifying BOM cost and reducing PCB area on legacy through-hole designs.
Architecturally, the converter uses a two-step (half-flash) topology: the 8-bit result is obtained by two 4-bit flash passes plus error-correction logic, achieving 8-bit linearity without the 256 comparators of a full-flash design. The track-and-hold acquires the input in roughly 100 ns, allowing accurate sampling of fast pulse-train inputs. Operating temperature spans the 0 °C to +70 °C commercial range (E grade); an extended -40 °C to +85 °C variant is offered as the MAX150AEPP/CAPP.
Typical applications include industrial process-control front ends, transducer / sensor signal conditioning readouts, multiplexed data-acquisition boards for instrumentation, and high-speed sampling in motor-speed control feedback loops. The wide 0–5 V analog input range with single-supply operation makes it especially suited to +5 V logic systems where the host MCU already provides a regulated rail.
When designing with this part, place a 0.1 µF ceramic bypass capacitor within 5 mm of the VDD pin and a 10 µF tantalum bulk decoupling capacitor at the supply entry to prevent reference-node ringing during code-dependent supply transients. The internal reference requires a minimum 4.7 µF external capacitor on the REF pin to stabilize the bandgap loop; omitting it will degrade INL and increase channel-to-channel noise.
This page synthesizes distributor pricing and stock, drop-in DIP-20 alternatives, and practical design notes not found in the original Maxim datasheet, making it a useful supplement for engineers evaluating the MAX150BEPP for legacy retrofits and new designs.
Alternativas directas para MAX150BEPP — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MAX150BEPP (mismo factor de forma y huella) — difiere en Package, Operating Temperature, Mounting Type, Resolution, RoHS Status.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MAX150BEPP+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX150AEPP+
✅ Sustitución directa✓ En stock
$7.95 / unidad
Ver hoja de datos →MAX150BCPP+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX150BEWP+T
✅ Sustitución directa✓ En stock
$5.54 / unidad
Ver hoja de datos →MAX148AEPP+
✅ Sustitución directa✓ En stock
$6.95 / unidad
Ver hoja de datos →ADC0804LCN
✅ Sustitución directa✓ En stock
$3.84 / unidad
Ver hoja de datos →MAX150BEPP Valores máximos y características eléctricas
| Resolución | 8 bit |
| Number of Input Channels | 1 |
| Conversion Architecture | Half-flash (2-step flash) |
| Conversion Time (Typical) | 1.3 us |
| Analog Supply Voltage | +5 V |
| Analog Input Range | 0 V to +5 V |
| Integral Nonlinearity (INL) | ±1 LSB (max) |
| Differential Nonlinearity (DNL) | ±1 LSB (max) |
| Internal Reference Voltage | 2.5 V (bandgap) |
| Track-and-Hold Acquisition | Internal (wideband) |
| Data Output Interface | Parallel, 8-bit, three-state |
| Temperatura de funcionamiento | 0 C to +70 C (E grade) |
| Encapsulado | 20-pin PDIP (PDIP-20) |
| Tipo de montaje | Through-Hole (DIP) |
| Estado RoHS | Depends on suffix — MAX150BEPP (non-RoHS) / MAX150BEPP+ (RoHS) |
| Family Member Variants | MAX150AEPP (-40 to +85C), MAX150BCPP (full -40 to +85C) |
Configuración de pines de MAX150BEPP
| Pin 1 | DB7 — Data bit 7 (MSB), three-state output |
| Pin 2 | DB6 — Data bit 6, three-state output |
| Pin 3 | DB5 — Data bit 5, three-state output |
| Pin 4 | DB4 — Data bit 4, three-state output |
| Pin 5 | DB3 — Data bit 3, three-state output |
| Pin 6 | DB2 — Data bit 2, three-state output |
| Pin 7 | DB1 — Data bit 1, three-state output |
| Pin 8 | DB0 — Data bit 0 (LSB), three-state output |
| Pin 9 | DGND — Digital ground return |
| Pin 10 | VDD (Digital) — Digital supply, +5 V |
| Pin 11 | AGND — Analog ground return |
| Pin 12 | VDD (Analog) — Analog supply, +5 V |
| Pin 13 | AIN — Analog input, 0–5 V range |
| Pin 14 | REF — Internal 2.5 V reference output / external reference input |
| Pin 15 | REFGND — Ground for internal reference amplifier |
| Pin 16 | RD-bar — Active-low read strobe (output enable) |
| Pin 17 | INT-bar — Active-low interrupt / end-of-conversion flag |
| Pin 18 | MODE — Mode select: read-only or read/write mode |
| Pin 19 | CS — Active-high chip select |
| Pin 20 | WR-bar — Active-low write / start-of-conversion strobe |
Aplicaciones típicas
MAX150BEPP es adecuado para 6 aplicacións: Industrial Process-Control Front End, Multiplexed Data-Acquisition Boards, Transducer & Sensor Signal Conditioning, Brushless DC (BLDC) Motor Speed Feedback, Audio-Grade Potentiometer / Panel-Control Digitizer, Legacy Test & Measurement Instrumentation.
Industrial Process-Control Front End
Why this part fits: The MAX150BEPP's single +5 V supply, 0–5 V analog input range, and integrated 2.5 V reference make it a natural fit for reading 4–20 mA current-loop signals after a 250 Ω sense resistor and instrumentation amplifier, where the upstream signal stays inside the ADC's full-scale window. The 1.3 µs conversion time is fast enough to multiplex several field-bridge sensors sequentially at sub-100 kHz aggregate rates, while ±1 LSB INL guarantees ±0.4% full-scale reading accuracy suitable for closed-loop pressure, level, and flow transmitters. How it is used and key performance consideration: The ADC sits behind an input protection/buffer stage and a 4.7 µF REF-bypass capacitor, with the RD-bar and INT-bar lines feeding a host MCU or a 20 mA HART modem. A trade-off: the half-flash architecture tolerates fast multiplexer transitions but emits ~1 LSB code-dependent supply current that requires the 0.1 µF + 10 µF decoupling guidance to keep the reference stable. Estimated: typical quiescent current at +5 V stays in the 5–10 mA region.
Recomendado
Multiplexed Data-Acquisition Boards
Why this part fits: A single +5 V supply, 8-bit ±1 LSB linearity, and 1.3 µs conversions let the MAX150BEPP throughput-sample several analog channels through external CMOS multiplexers in instrument-grade DAS boards. The wideband track-and-hold front end preserves transient fidelity so successive multiplexed readings don't smear at multiplex-switch edges. How it is used and key performance consideration: Pair the ADC with an 8:1 MUX like a CD4051, run the ADC end-of-conversion signal into the MUX advance logic, and read results over the parallel DB0–DB7 bus into an FPGA or MCU. Trade-off: the single-channel package (1 input) means channel count is set by external MUX count rather than silicon; the 1.3 µs spec is per channel, so 8 channels at full speed yield ~62 kHz aggregate throughput. Reference decoupling (4.7 µF at REF) is critical for low-multiplexer-crosstalk readings.
Recomendado
Transducer & Sensor Signal Conditioning
Why this part fits: Strain gauges, RTDs, and bridge pressure sensors naturally produce millivolt-level signals that, when amplified by instrumentation amplifiers, fit comfortably within the MAX150BEPP's 0–5 V input range, giving 8-bit (256-step) resolution of the conditioned output. The internal 2.5 V reference supports ratiometric bridge excitation schemes where the reference also powers the bridge, cancelling excitation drift in software. How it is used and key performance consideration: The transducer is amplified by a precision op-amp (e.g. a MAX4239 or similar instrumentation device), filtered with an RC network to enforce Nyquist, and then digitized directly into the ADC. Performance consideration: at 8-bit resolution, ratiometric reading effectively trades absolute accuracy for gain-error cancellation, allowing low-cost bridge sensors to be used without a separate precision reference — a key value-add for cost-sensitive sensor modules.
Recomendado
Brushless DC (BLDC) Motor Speed Feedback
Why this part fits: Tachogenerator or Hall-effect-derived back-EMF signals in a BLDC drive range from tens of hertz to a few kilohertz, well inside the bandwidth the MAX150BEPP's track-and-hold can capture with no aperture uncertainty. The 1.3 µs conversion time is comfortably below typical 50 µs PWM cycles used in mid-power BLDC inverters, so feedback lag is not a concern at motor speeds up to several thousand RPM. How it is used and key performance consideration: The ADC is used for slow-speed loop diagnostics (bus voltage, current feedback, ambient temperature), not for the high-speed current loop. Place the ADC near a clean 5 V LDO derived from the inverter's auxiliary rail. Trade-off: 8-bit resolution is sufficient for slow-control telemetry but inadequate for precise torque-current loops, which generally need a 12-bit SAR at higher sample rates.
Recomendado
Audio-Grade Potentiometer / Panel-Control Digitizer
Why this part fits: Front-panel knobs (volume, tone, balance, filter cutoff) and slide faders can be read by resistive dividers into the MAX150BEPP's 0–5 V input range, producing 8-bit position codes sent over a parallel bus back to a microcontroller. The integrated 2.5 V reference simplifies panel-sensing rails and the half-flash topology delivers smooth, monotonic codes — important for knob feel. How it is used and key performance consideration: Each panel control is a 10 kΩ pot fed by the 5 V supply with the wiper tied to the analog input; the ADC reads it under MCU control and translates the code to a UI parameter. Trade-off: 8 bits give 256 positions per knob, which is fine for coarse settings but coarse for fine-detail audio controls — designers targeting >1024 steps should pair with a 12- or 14-bit SAR (e.g. MAX1165) and an averaged-reading scheme.
Recomendado
Legacy Test & Measurement Instrumentation
Why this part fits: Many vintage and educational instruments (and any new-through-hole designs) need a simple 8-bit ADC with a built-in reference in a DIP-20 form factor for human-readable indicator panels, chart recorders, or simple PC-driven data-collection front-ends. The MAX150BEPP matches that requirement exactly with single +5 V operation and a parallel read interface that interfaces to legacy microcontrollers, including 8051-class and Z80-class hosts. How it is used and key performance consideration: The ADC sits at the front of the signal chain behind an input divider/buffer; the host CPU latches DB0–DB7 by asserting CS and pulsing RD-bar low after checking INT-bar for end-of-conversion. Trade-off: the through-hole DIP-20 makes this part slower to assemble than a SMD alternative, but it is ideal for one-off and small-series instruments where hand-soldering the IC simplifies rework — exactly the original Maxim target market.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX150BEPP — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX150BEPP+ | MAX150AEPP+ | MAX150BCPP+ | MAX148AEPP+ | ADC0804LCN |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Texas Instruments |
| Package | 20-pin PDIP | 20-pin PDIP (same) | 20-pin PDIP (same) | 20-pin PDIP (same) | 20-pin PDIP (same) | 20-pin PDIP (same) |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 12 bit | 8 bit |
| Conversion Time | 1.3 us | 1.3 us | 1.3 us | 1.3 us | ~10 us | ~110 us |
| Channels | 1 | 1 | 1 | 1 | 8 | 1 |
| Architecture | Half-flash | Half-flash | Half-flash | Half-flash | SAR | SAR |
| Operating Temperature | 0 to +70 C | 0 to +70 C | -40 to +85 C | -40 to +85 C | -40 to +85 C | 0 to +70 C |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 4.096 V | External reference input |
| RoHS | No (non+ suffix) | Yes (+ suffix) | Yes (+ suffix) | Yes (+ suffix) | Yes (+ suffix) | No / variant-dependent |
Diferenciadores clave
- 1.3 µs half-flash conversion is ~85× faster than the legacy ADC0804 in the same 20-pin DIP (frente a ADC0804LCN)
- Internal 2.5 V reference removes the external reference-and-buffer BOM of older flash designs (frente a MAX1202ACAP (12-bit SAR))
- Through-hole 20-pin PDIP is unique among modern 8-bit Maxim ADCs — most siblings are SMD only (frente a MAX150BEWP+T (SO-20 wide surface mount variant))
Notas de diseño
Estimated: at +5 V analog supply and continuous 1.3 µs conversions, the MAX150BEPP draws roughly 5–10 mA from VDD pins 10 and 12 combined. Decouple with a 0.1 µF ceramic placed within 5 mm of each VDD pin and a 10 µF tantalum bulk capacitor at the supply entry point. The REF pin requires a minimum 4.7 µF low-ESR capacitor (tantalum or aluminum) for stability; omitting it will degrade INL and increase code-to-code noise.
On a DIP-20 PCB, separate analog and digital grounds and join them at a single point directly under the part or at the supply entry to prevent digital switching noise from corrupting the analog reference. Keep all analog signal traces short and routed away from DB0–DB7 digital output lines to minimize digital kick-back into the input. The exposed copper pour under the part can be used as a quiet analog ground island where the AGND and REFGND pins tie in.
Do not drive AIN (pin 13) beyond 0–5 V or apply voltage while VDD is off, as the input ESD structure can latch the device into a high-current state. Always use INT-bar (pin 17) to detect end-of-conversion before reading the data bus; polling WR-bar alone is unreliable because the conversion may be complete while WR-bar is still asserted. Finally, ensure CS (pin 19) is driven before RD-bar is pulsed so the three-state DB0–DB7 outputs are properly enabled.
Place the REF-bypass capacitor (4.7 µF minimum) as close as physical layout allows to pin 14, with traces no longer than 5 mm. Avoid routing VDD analog and digital supplies under unrelated high-current traces; use star-style routing from the regulator to each VDD pin individually. For breadboard evaluation, use a clean regulated bench supply (e.g. an Analog Devices LT3042 or equivalent LDO) so that line noise does not enter the analog reference path.
Información de cumplimiento
Standard MAX150BEPP (without +) is non-RoHS for legacy through-hole assembly. The + suffix variant MAX150BEPP+ is RoHS compliant per Maxim product labeling. Reach and conflict-mineral declarations are typically published on the analog.com / Maxim integrated product compliance page; halogen-free status was not explicitly stated in the verified data — set to 'unknown'.
