MAX1082ACUE+T - 10-Bit 400ksps 4-Ch Serial ADC | Maxim
N.º de pieza: MAX1082ACUE+T ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.42 | $6,42 |
| 10 | $5.87 | $58,70 |
| 100 | $5.18 | $518,00 |
| 500 | $4.65 | $2.325,00 |
| 1.000 | $4.1 | $4.100,00 |
MAX1082ACUE+T Descripción general
An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples a continuous-time analog signal and quantizes it into a digital code for processing by a microcontroller, FPGA, or DSP. SAR ADCs specifically use a binary-search successive-approximation algorithm, balancing speed, accuracy, and low power consumption, which makes them ideal for multiplexed data-acquisition systems. The MAX1082ACUE+T belongs to the broader hierarchy: SAR ADC -> ADC -> data converter -> mixed-signal IC -> semiconductor.
Key features include a single-supply +2.7V to +3.6V analog supply (with a separate 3.3V-or-5V-tolerant digital interface on the MAX1083 variant), a hardware-configurable 2-channel or 4-channel analog input multiplexer (mux), an internal 2.5V reference, and a SPI/QSPI/MICROWIRE-compatible 4-wire serial interface that allows direct connection to most microcontrollers and DSPs without glue logic.
The architecture pairs an input track/hold with the SAR core and an on-chip reference, eliminating the need for an external reference in many applications and reducing total BOM count. The wide input common-mode range and low analog-input leakage extend the device's usefulness in industrial sensor-interface designs.
Typical applications include portable data logging, patient-monitoring and portable medical instruments, process-control analog I/O modules, and battery-powered instrumentation. The combination of low power consumption, small TSSOP-16 footprint, and 4-channel input mux makes it particularly well-suited to multi-sensor handheld designs where board space and battery life are at a premium.
When designing with the MAX1082ACUE+T, ensure that decoupling capacitors are placed as close as possible to AVDD/DVDD, and that the analog and digital ground planes are joined at a single star point under the exposed thermal pad to minimize noise coupling into the SAR comparator.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the standalone manufacturer datasheet, providing engineers with a decision-ready procurement and design reference.
Alternativas directas para MAX1082ACUE+T — 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 MAX1082ACUE+T (mismo factor de forma y huella) — difiere en Package, Resolution, Architecture, Internal Reference Voltage, Number of Analog Input Channels.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MAX1082AEUE+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX1082BCUE+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX1082BEUE+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX1083ACUE+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX1083AEUE+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC1863LCGN
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX1082ACUE+T Valores máximos y características eléctricas
| Resolución | 10 bits |
| Sampling Rate (MAX1082) | 300 ksps |
| Sampling Rate (MAX1083) | 400 ksps |
| Number of Analog Input Channels | 4 (2- or 4-channel software-configurable) |
| ADC Architecture | SAR (Successive Approximation Register) |
| Analog Supply Voltage (AVDD) | +2.7 V to +3.6 V |
| Digital Supply Voltage (DVDD) | +2.7 V to +3.6 V |
| Internal Reference Voltage | 2.5 V |
| Digital Interface | Serial (SPI/QSPI/MICROWIRE-compatible, 4-wire) |
| Track/Hold Bandwidth | High-bandwidth (per datasheet typical performance) |
| Number of Inputs | 1 SAR with 2/4-input mux |
| Encapsulado | 16-TSSOP |
| Rango de temperatura de funcionamiento | 0 °C to +70 °C (commercial; A grade) |
| Tipo de montaje | Surface Mount |
| RoHS Compliance | Compliant (T suffix denotes tape-and-reel, lead-free) |
Configuración de pines de MAX1082ACUE+T
| Pin 1 | AIN0 — Analog Input 0 (to mux) |
| Pin 2 | AIN1 — Analog Input 1 (to mux) |
| Pin 3 | AIN2 — Analog Input 2 (to mux) |
| Pin 4 | AIN3 — Analog Input 3 (to mux) |
| Pin 5 | COM — Common input for single-ended conversions |
| Pin 6 | REF — Internal reference bypass / external reference input |
| Pin 7 | AVDD — Analog supply (+2.7V to +3.6V) |
| Pin 8 | GND — Analog ground |
| Pin 9 | DVDD — Digital supply (+2.7V to +3.6V) |
| Pin 10 | DGND — Digital ground |
| Pin 11 | CS — Active-low chip select (SPI/CSPI) |
| Pin 12 | DOUT — Serial data output (SPI) |
| Pin 13 | SCLK — Serial clock input (SPI) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
Aplicaciones típicas
MAX1082ACUE+T es adecuado para 6 aplicacións: Portable Data Logging, Patient Monitoring and Portable Medical Instruments, Process Control Analog I/O Modules, Battery-Powered Instrumentation, Sensor Multiplexing Nodes, HMI Touch and Control Panels.
Portable Data Logging
The MAX1082ACUE+T's 4-channel input mux and 300 ksps SAR core make it ideal for portable multi-sensor data loggers where board space and battery life are at a premium. The +2.7V to +3.6V single-supply operation lets it run directly off a single Li-ion cell or two AA cells, while the internal 2.5V reference eliminates an external reference and its quiescent drain. The 4-wire SPI-compatible serial interface requires only four GPIO pins from the host MCU, leaving the remaining pins free for SD-card interfaces and other peripherals.
Recomendado
Patient Monitoring and Portable Medical Instruments
The MAX1082ACUE+T's low-power single-supply operation and small TSSOP-16 footprint (5.0 x 4.4 mm body) make it well-suited to portable patient monitors that sample multiple analog signals such as SpO2, temperature, and respiration. The 10-bit resolution is sufficient for vital-sign monitoring applications, and the 4-channel mux lets a single ADC handle multiple front-end sensors. According to Maxim's datasheet, the wide common-mode input range simplifies the front-end signal-conditioning circuit, reducing component count and improving reliability.
Recomendado
Process Control Analog I/O Modules
For industrial process-control analog-input modules that read 4-20 mA current loops or 0-10V sensor signals, the MAX1082ACUE+T provides four independent single-ended inputs that can be time-multiplexed into a single SAR core. The 300 ksps throughput is sufficient for sub-millisecond per-channel acquisition, supporting 100 Hz control loops with substantial margin. The 0-70C commercial temperature range covers most factory-floor environments, while designers needing wider temperature should select the MAX1082AEUE+ or MAX1082BEUE+ for -40 to +85C coverage.
Recomendado
Battery-Powered Instrumentation
Battery-powered test instruments benefit from the MAX1082ACUE+T's combination of single +3.3V supply operation, internal 2.5V reference (which avoids the constant drain of an external reference), and software power-down modes between conversions. The TSSOP-16 footprint saves critical board space in handheld DMMs and oscilloscope probes. According to Maxim's datasheet, designers should budget adequate decoupling on AVDD/DVDD to keep the SAR comparator isolated from MCU switching noise on the digital rails.
Recomendado
Sensor Multiplexing Nodes
Industrial sensor-multiplexing nodes that aggregate analog signals from thermocouples, RTDs, pressure transducers, and strain gauges require compact ADCs with multi-channel inputs. The MAX1082ACUE+T's 4-channel analog mux lets one ADC replace four single-channel parts, reducing BOM and PCB area by up to 75 percent. The 10-bit resolution is sufficient for process-control monitoring where 0.1% absolute accuracy is not required. The serial interface simplifies isolated SPI implementation using digital isolators.
Recomendado
HMI Touch and Control Panels
Human-machine interface (HMI) panels that read potentiometer knobs, joystick positions, and analog push-buttons can use the MAX1082ACUE+T to digitize up to four analog inputs from a single 16-pin chip. The serial interface saves microcontroller pins compared to parallel ADCs, which is critical in low-cost HMI designs where the MCU has limited GPIO. The internal reference simplifies calibration, and the 0-70C commercial temperature grade covers most factory-floor enclosures with passive cooling.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX1082ACUE+T — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX1082AEUE+ | MAX1083ACUE+ | LTC1863LCGN |
|---|---|---|---|---|
| Brand | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Linear Technology |
| Package | TSSOP-16 | TSSOP-16 (same) | TSSOP-16 (same) | TSSOP-16 GN (same) |
| Resolution | 10 bits | 10 bits | 10 bits | 12 bits |
| Sampling Rate | 300 ksps | 300 ksps | 400 ksps | 200 ksps |
| Input Channels | 4 (2- or 4-channel mux) | 4 (2- or 4-channel mux) | 4 (2- or 4-channel mux) | 8 (different mux config) |
| Internal Reference | 2.5V | 2.5V | 2.5V | External required |
| Supply Voltage | +2.7V to +3.6V | +2.7V to +3.6V | +2.7V to +3.6V | +5V single |
| Temperature Range | 0C to +70C (C-grade) | -40C to +85C (E-grade) | 0C to +70C (C-grade) | 0C to +70C (L-grade) |
| Serial Interface | SPI/QSPI/MICROWIRE (4-wire) | SPI/QSPI/MICROWIRE (4-wire) | SPI/QSPI/MICROWIRE (4-wire) | SPI/MICROWIRE (3-wire) |
Diferenciadores clave
- Internal 2.5V reference eliminates external reference component (frente a LTC1863LCGN)
- Four-wire SPI with hardware mux configuration (frente a LTC1863LCGN 3-wire SPI)
- 300 ksps with internal 2.5V reference in one TSSOP-16 package (frente a Discrete ADC + external reference)
Notas de diseño
Place 10 uF and 0.1 uF decoupling capacitors as close as possible to the AVDD and DVDD pins, with the 0.1 uF cap directly adjacent to each supply pin. The MAX1082ACUE+T uses separate analog and digital supplies, and routing the decoupling return currents through their respective ground pins (GND for AVDD, DGND for DVDD) reduces switching noise on the SAR comparator reference. Estimated: with a 300 ksps conversion rate and the datasheet's typical supply current, budget roughly 2 mA continuous supply current for normal operation.
Route the AGND (pin 8) and DGND (pin 10) planes as separate solid copper regions, joining them at a single star point directly under the exposed thermal pad of the TSSOP-16 package. This avoids ground loops in which MCU-side digital return currents couple into the analog comparator. Place a ferrite bead between AVDD and DVDD if they come from a common upstream regulator, and ensure the SPI trace from DOUT to the host MCU is short and routed over a continuous ground plane to avoid radiating harmonics during conversion.
Common design errors with the MAX1082ACUE+T include: (1) omitting the COM input return path when using single-ended conversions, which forces the ADC to read offset errors; (2) failing to assert CS (chip select) during power-up, which can leave the digital interface in an undefined state; (3) using long, parallel-routed analog input traces that pick up switching noise from the SPI clock; (4) oversampling beyond 300 ksps, which causes the SAR capacitor droop to degrade linearity. The Maxim datasheet recommends conservative analog-input RC filtering with source impedance below 1 kohm.
The MAX1082ACUE+T's high-bandwidth track-and-hold can acquire a 1 V p-p signal in 100 ns, but only if the analog input is properly driven. Estimated: if the input source impedance exceeds 1 kohm, internal sampling-capacitor charging errors degrade the conversion result. Place a low-impedance buffer (such as the MAX4475 or MAX4238 op-amp) within 10 mm of the AINx pins for source impedances above 5 kohm, and use a 10 nF ceramic bypass on the COM pin to reduce common-mode switching transients.
Información de cumplimiento
The T suffix indicates lead-free / RoHS-compliant construction per Maxim product declaration. The standard part is not AEC-Q100 qualified - choose the MAX1082AEUE+ for automotive/extended-temperature applications. Halogen-free status was not explicitly confirmed in the verified data and is listed as unknown.
