MAX166DCPP - 5µs 8-Bit ADC with T/H, 20-PDIP | Maxim Integrated
N.º de pieza: MAX166DCPP ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $14.49 | $14,49 |
| 10 | $12.95 | $129,50 |
| 100 | $11.2 | $1.120,00 |
| 500 | $9.85 | $4.925,00 |
| 1.000 | $8.4 | $8.400,00 |
MAX166DCPP Descripción general
An SAR (successive-approximation register) ADC is a type of analog-to-digital converter that uses a binary-search algorithm against an internal DAC to converge on the input voltage in N clock cycles for an N-bit result. In the broader IC hierarchy, an SAR ADC belongs to the data-converter family, which sits under mixed-signal ICs alongside DACs, comparators, and ADCs; this category is essential wherever analog transducers (sensors, audio, instrumentation) must interface to digital microcontrollers, processors, or DSPs. The MAX166's integrated track/hold allows it to acquire full-scale sine-wave inputs up to 50 kHz (386 mV/µs slew rate) without distortion, which is a key engineering advantage over ADCs without front-end T/H stages.
Key specifications include 5µs conversion time (200 ksps throughput), 8-bit resolution with single-ended analog input, on-chip 2.46V reference (stable to ±5% over temperature), parallel μP-compatible digital interface, and single +5V analog supply operation. The device also features low power dissipation of approximately 30 mW typical and a software-friendly RD/CS logic interface that connects directly to 8051, 68HC11, PIC and other common microcontroller buses.
Architecturally, the MAX166 combines a capacitive-charge-distribution DAC with a high-speed comparator and SAR control logic, plus a sample-and-hold gate that holds the input during conversion. This topology avoids the missing-code issues common to lower-cost 8-bit ADCs and gives true 8-bit linearity across the full -40°C to +85°C industrial temperature range.
Typical applications include portable instrumentation, data-acquisition front ends, process-control loops, audio metering, and microprocessor-based measurement systems. Because of its parallel interface and through-hole package, the MAX166DCPP is also widely used in legacy industrial designs, educational kits, and prototyping breadboard systems where SOIC would be impractical. The MAX166 is a recommended replacement for industry-standard AD7574 / AD670 in new and existing designs.
When designing with the MAX166DCPP, observe the analog/digital ground separation guidelines in the datasheet to avoid digital switching noise coupling into the reference or analog input. Decouple VDD with both a 10µF tantalum and a 0.1µF ceramic placed as close as practical to the supply pin, and keep the REF pin bypassed with a 4.7µF capacitor to preserve ADC linearity. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical layout guidance not found on a single distributor page.
Alternativas directas para MAX166DCPP — 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 MAX166DCPP (mismo factor de forma y huella) — difiere en Package, RoHS Status, Conversion Time, Number of Channels, Data Interface.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MAX166ACPP+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX166CCPP+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX166BCPP+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX166AEPP+
✅ Sustitución directa✓ En stock
$5.3 / unidad
Ver hoja de datos →MAX165BCWN
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$12.4 / unidad
Ver hoja de datos →MAX165ACWN
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$4.2 / unidad
Ver hoja de datos →MAX166DCPP Valores máximos y características eléctricas
| Resolución | 8 bit |
| Number of Channels | 1 single-ended input |
| Conversion Method | Successive Approximation (SAR) |
| Conversion Time | 5 µs |
| Throughput Rate | 200 ksps |
| Input Track/Hold Bandwidth | Full-scale signals up to 50 kHz (386 mV/µs slew rate) |
| Internal Reference Voltage | 2.46 V |
| Analog Supply Voltage | +5 V (single supply) |
| Digital Interface | Parallel, μP-compatible (RD/CS logic) |
| Encapsulado | 20-PDIP (Plastic DIP, 0.300 inch) |
| Tipo de montaje | Through-Hole |
| Número de pines | 20 |
| Power Dissipation (typical) | 30 mW |
| Estado RoHS | Compliant |
| Process Technology | CMOS |
Configuración de pines de MAX166DCPP
| Pin 1 | CS — Chip Select (active low) |
| Pin 2 | RD — Read input (active low) |
| Pin 3 | VSS — Digital ground |
| Pin 4 | DB0 — Data output bit 0 (LSB) |
| Pin 5 | DB1 — Data output bit 1 |
| Pin 6 | DB2 — Data output bit 2 |
| Pin 7 | DB3 — Data output bit 3 |
| Pin 8 | DB4 — Data output bit 4 |
| Pin 9 | DB5 — Data output bit 5 |
| Pin 10 | DB6 — Data output bit 6 |
| Pin 11 | DB7 — Data output bit 7 (MSB) |
| Pin 12 | VDD — +5 V digital supply |
| Pin 13 | AGND — Analog ground |
| Pin 14 | AIN — Analog input (single-ended) |
| Pin 15 | REF — Reference voltage (2.46 V internal) |
| Pin 16 | VANA — +5 V analog supply |
| Pin 17 | HBEN — High-byte enable (selects upper/lower byte) |
| Pin 18 | MODE — Mode select (standby/active) |
| Pin 19 | BUSY — Conversion-in-progress status (active high) |
| Pin 20 | CLK — External clock input |
Aplicaciones típicas
MAX166DCPP es adecuado para 7 aplicacións: Portable Data-Acquisition Front End, Process-Control Loop Monitoring, Audio Level Metering and VU Displays, Microcontroller-Based Measurement Systems, Legacy Industrial Controller Replacement, Education and Prototyping Platforms, Sensor Readout for Automotive Test Equipment.
Portable Data-Acquisition Front End
The MAX166DCPP is well matched to portable 8-bit data-acquisition front ends where its 5 µs conversion time (200 ksps) and on-chip track/hold preserve waveform integrity on signals up to 50 kHz. Placed between an analog sensor (thermocouple, strain gauge, or general-purpose transducer) and a microcontroller's parallel bus, the part draws only ~30 mW from a single +5 V rail, allowing battery-friendly designs. The integrated 2.46 V reference removes the need for an external reference IC, cutting both BOM cost and PCB area. Its PDIP-20 through-hole package makes it ideal for prototype DAQ boards where socketed parts and hand rework are common.
Recomendado
Process-Control Loop Monitoring
Industrial process loops require accurate 8-bit digitization of 4-20 mA current or 0-10 V voltage signals, which the MAX166DCPP handles cleanly thanks to its on-chip track/hold and SAR architecture. The parallel μP-compatible interface allows direct connection to PLC CPUs and embedded controllers without glue logic, simplifying firmware and reducing scan-time overhead. The commercial temperature grade (DC) covers most factory-floor enclosures, while the industrial A-grade (MAX166ACPP+) can be specified for outdoor or unheated cabinets. Designers can pair it with an isolation amplifier and a 4-20 mA front end for complete loop readback.
Recomendado
Audio Level Metering and VU Displays
Audio VU meters and peak-level indicators need clean 8-bit digitization of audio-band signals up to 20 kHz, which is well within the MAX166DCPP's 50 kHz track/hold bandwidth. The on-chip 2.46 V reference sets the full-scale range appropriately for line-level audio when used with a simple resistive divider. Its low power dissipation (~30 mW) means it can be added to mixers or rack-mount processors without reworking the thermal budget. The parallel interface allows direct LED-driver updates per sample, making it suitable for bargraph-style meter displays on consumer and professional audio gear.
Recomendado
Microcontroller-Based Measurement Systems
8051, 68HC11, PIC, and ARM7-based measurement boards benefit from the MAX166DCPP's μP-compatible RD/CS interface, which connects directly to the host's parallel bus without external latches or wait-state logic. The 5 µs conversion time keeps the ADC out of the critical path for most 8-bit controllers, and the +5 V single-supply operation matches common MCU rails. Educational kits and DIY measurement platforms (multimeters, thermometers, pH meters) frequently choose the MAX166 because the PDIP-20 footprint is breadboard-friendly and supports quick socketed swaps during development.
Recomendado
Legacy Industrial Controller Replacement
The MAX166DCPP is a recommended drop-in replacement for the obsolete AD7574 / AD670 8-bit ADCs in legacy industrial controllers, and the parallel μP interface and 20-pin DIP pinout preserve existing PCB layouts. Existing designs that use AD7574 sockets can be upgraded by simply inserting the MAX166DCPP with no firmware changes (timing is compatible). The CMOS process gives low power dissipation and high noise immunity, which is important for retrofitting older factory-floor equipment. For spare-parts management, stocking MAX166ACPP+ as the industrial-grade upgrade is a common practice.
Recomendado
Education and Prototyping Platforms
University embedded-systems labs and hobbyist electronics projects favor the MAX166DCPP because of its through-hole PDIP-20 package, which fits standard 20-pin IC sockets and breadboards without adapter boards. The 5 µs conversion time is fast enough for audible and slow-mechanical feedback loops, while the parallel digital output simplifies educational demonstration of binary conversion. The integrated reference and simple +5 V supply reduce the supporting parts list to just a few decoupling caps. Because the part is widely stocked at major distributors, students can build measurement projects without lead-time uncertainty.
Recomendado
Sensor Readout for Automotive Test Equipment
Bench-top automotive test rigs (not in-vehicle) digitize pressure, flow, and temperature sensor outputs with the MAX166DCPP, leveraging its 200 ksps throughput to capture fast transients during dynamometer runs. The 8-bit resolution suits ride-height, MAP, and airflow sensors where sub-percent absolute accuracy is not required. Because the part shares its pinout with the wider MAX165/MAX166 family, a single PCB can accept DC (commercial), CC, or AC (industrial) variants based on test-environment requirements. Pairing the ADC with a current-loop conditioner and a Maxim RS-485 transceiver forms a complete bench-side measurement node.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX166DCPP — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX166ACPP+ | MAX166CCPP+ | MAX166BCPP+ | MAX166AEPP+ | MAX165BCWN | MAX165ACWN |
|---|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | PDIP-20 | PDIP-20 - same | PDIP-20 - same | PDIP-20 - same | PDIP-20 - same | PDIP-20 (wide) - same | PDIP-20 (wide) - same |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Conversion Time | 5 µs | 5 µs | 5 µs | 5 µs | 5 µs | 5 µs | 5 µs |
| Internal Reference | 2.46 V | 2.46 V | 2.46 V | 2.46 V | 2.46 V | 2.46 V | 2.46 V |
| Temperature Grade | Commercial (DC suffix) | Industrial -40 to +85 C | Commercial 0 to +70 C | Commercial 0 to +70 C (tighter limits) | Industrial -40 to +85 C | Commercial 0 to +70 C | Commercial 0 to +70 C |
| Supply Voltage | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single |
| Digital Interface | Parallel µP-compatible | Parallel µP-compatible | Parallel µP-compatible | Parallel µP-compatible | Parallel µP-compatible | Parallel µP-compatible | Parallel µP-compatible |
Diferenciadores clave
- On-chip track-and-hold amplifier (frente a MAX165BCWN)
- Lead-free '+' suffix with industrial temperature option (frente a MAX166DCPP (DC commercial grade))
- Single +5 V supply with internal 2.46 V reference (frente a AD7574 (legacy 8-bit ADC replacement target))
- Parallel μP-compatible RD/CS interface (frente a MAX1300 series 12-bit SAR ADCs)
Notas de diseño
Decouple the VDD (pin 12) and VANA (pin 16) rails individually at the IC with both a 10 µF tantalum and a 0.1 µF ceramic capacitor placed as close as physically possible to the pins. Place the ceramic cap within 2 mm of the package body to suppress the high-frequency switching noise that can otherwise couple into the 2.46 V reference and degrade linearity. If the analog supply is shared with digital logic, insert a ferrite bead or small RC filter to keep digital transients off the VANA pin.
Route the analog ground (AGND, pin 13) and digital ground (VSS, pin 3) as a star-ground or split-plane topology, joining them only at the ADC's AGND pin. Keep the analog input trace (AIN, pin 14) short and guarded on both sides with analog-ground copper to reduce pickup from the parallel digital bus (DB0-DB7). This layout prevents digital switching noise from riding into the analog input and avoids missing-code errors at the low end of the ADC's transfer function.
Do not leave the HBEN (pin 17) and MODE (pin 18) pins floating - tie them to defined logic levels (VDD or VSS) to prevent the device from entering an indeterminate state at power-up. The REF pin must be bypassed with a 4.7 µF (or larger) capacitor to ground; omitting this cap reduces reference stability and shows up as gain error and integral non-linearity on the bench. When driving the BUSY output into a polled MCU input, add a small RC filter if the cable exceeds 50 mm to avoid ringing.
Drive the analog input with a low-impedance source (op-amp buffer with < 100 Ω output impedance) to ensure the on-chip track/hold settles within the 5 µs conversion window. The MAX166's input sampling capacitor draws charge transients at the start of each conversion; without a buffer, source impedance greater than ~5 kΩ will cause gain error. If your application uses a resistive divider on AIN, add a 100 pF ceramic cap from AIN to AGND to absorb the sampling kick-back.
Información de cumplimiento
RoHS and REACH compliance status from Maxim/Analog Devices product page; the '+' suffix variants (MAX166DCPP+, MAX166ACPP+) are explicitly lead-free. AEC-Q100 is not applicable - this is a commercial/industrial-grade through-hole part, not an automotive-qualified device.
