MAX1309ECM/V+ - 12-Bit 4-Ch 1.075Msps SAR ADC | Maxim Integrated
N.º de pieza: MAX1309ECM/V+ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $14.32 | $14,32 |
| 10 | $13.05 | $130,50 |
| 100 | $11.42 | $1.142,00 |
| 500 | $10.18 | $5.090,00 |
| 1.000 | $9.06 | $9.060,00 |
MAX1309ECM/V+ Descripción general
An ADC (analog-to-digital converter) is a data-acquisition component that converts real-world analog signals into discrete digital codes for processing by a microcontroller, DSP, or FPGA. SAR ADCs specifically use a binary-search capacitor array and a comparator to perform one bit at a time per clock cycle, trading off speed for excellent DC accuracy (no pipeline latency, ideal for multiplexing and event-triggered sampling). The MAX1309 family fits in the data-acquisition signal chain alongside sensors, instrumentation amplifiers, and multiplexers.
Key features include four independent track-and-hold (T/H) amplifiers that sample all channels simultaneously for true phase-coherent multi-axis measurements, an internal 4.096V reference, and a high-speed parallel interface compatible with 3V digital logic. The device operates from a single 3.0V analog supply plus a separate 3.0V digital supply for noise isolation. Per-channel throughput up to 1.075 Msps is achievable using an external clock up to 25 MHz.
The architecture combines a charge-distribution SAR core with dedicated T/H front-ends and per-channel input-protection clamps. The integrated reference and T/H eliminate the need for external sample-and-hold components, simplifying multi-axis vibration, power-line monitoring, and three-phase motor-control designs. The 48-LQFP footprint enables hand-solderable prototyping and standard reflow assembly.
Typical applications include industrial process control, multi-phase power metering, vibration and acoustic analysis, three-phase motor control, and automotive data acquisition. The simultaneous-sampling channels make the part especially well suited to applications where phase relationships between input signals must be preserved.
When designing with the MAX1309ECM/V+, observe the layout guideline of separating analog and digital ground returns and placing 10µF plus 0.1µF bypass capacitors as close as possible to each supply pin. Verify that the input common-mode voltage stays within the selected range; out-of-range inputs are clamped but continuous overdrive can cause self-heating. This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet alone.
Alternativas directas para MAX1309ECM/V+ — 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 MAX1309ECM/V+ (mismo factor de forma y huella) — difiere en Resolution, Package, RoHS Status, Architecture, Data Interface.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MAX1309ECM+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX1304ECM/V+
✅ Sustitución directa✓ En stock
$12.5 / unidad
Ver hoja de datos →MAX1304ECM+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX1310ECM/V+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX1311ECM/V+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX1309ECM/V+ Valores máximos y características eléctricas
| Resolución | 12 bits |
| Number of Channels | 4 (simultaneous sampling) |
| Conversion Architecture | SAR (Successive Approximation Register) |
| Sample Rate (per channel) | 1.075 Msps |
| Input Range | ±10V, ±5V, 0 to +5V (software configurable) |
| Input Type | True differential, ±18V over-range protection |
| Analog Supply Voltage | 3.0 V nominal (3.0V AVDD) |
| Digital Supply Voltage | 3.0 V nominal (3.0V DVDD) |
| Internal Reference | 4.096 V |
| Data Interface | Parallel, 3V logic compatible |
| Track-and-Hold | 4 independent per-channel T/H |
| Rango de temperatura de funcionamiento | -40 °C to +85 °C |
| Encapsulado | 48-pin LQFP (7 mm x 7 mm) |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 3 (168 hours) |
| Grade Suffix | /V+ (automotive / high-reliability) |
Configuración de pines de MAX1309ECM/V+
| Pin 1 | AIN0+ — Channel 0 positive differential input |
| Pin 2 | AIN0- — Channel 0 negative differential input |
| Pin 3 | AIN1+ — Channel 1 positive differential input |
| Pin 4 | AIN1- — Channel 1 negative differential input |
| Pin 5 | AIN2+ — Channel 2 positive differential input |
| Pin 6 | AIN2- — Channel 2 negative differential input |
| Pin 7 | AIN3+ — Channel 3 positive differential input |
| Pin 8 | AIN3- — Channel 3 negative differential input |
| Pin 9 | AVDD — Analog supply, 3V nominal |
| Pin 10 | AGND — Analog ground |
| Pin 11 | REF — Internal reference bypass / external reference input |
| Pin 12 | REFCAP — Reference bypass capacitor |
| Pin 13 | DVDD — Digital supply, 3V nominal |
| Pin 14 | DGND — Digital ground |
| Pin 15 | CLK — External clock input (up to 25 MHz) |
| Pin 16 | CNVST — Convert start input |
| Pin 17 | EOC — End-of-conversion output |
| Pin 18 | CS — Chip select, active low |
| Pin 19 | RD — Read strobe, active low |
| Pin 20 | WR — Write strobe, active low |
| Pin 21 | D0 — Parallel data bit 0 (LSB) |
| Pin 22 | D1 — Parallel data bit 1 |
| Pin 23 | D2 — Parallel data bit 2 |
| Pin 24 | D3 — Parallel data bit 3 |
| Pin 25 | D4 — Parallel data bit 4 |
| Pin 26 | D5 — Parallel data bit 5 |
| Pin 27 | D6 — Parallel data bit 6 |
| Pin 28 | D7 — Parallel data bit 7 |
| Pin 29 | D8 — Parallel data bit 8 |
| Pin 30 | D9 — Parallel data bit 9 |
| Pin 31 | D10 — Parallel data bit 10 |
| Pin 32 | D11 — Parallel data bit 11 (MSB) |
| Pin 33 | CHSEL0 — Channel select bit 0 |
| Pin 34 | CHSEL1 — Channel select bit 1 |
| Pin 35 | RNG0 — Input range select bit 0 |
| Pin 36 | RNG1 — Input range select bit 1 |
| Pin 37 | PD — Power-down input, active high |
| Pin 38 | RESET — Reset input, active low |
| Pin 39 | CAL — Calibration control input |
| Pin 40 | INT — Interrupt output |
| Pin 41 | TEST1 — Test mode input 1 (factory use) |
| Pin 42 | TEST2 — Test mode input 2 (factory use) |
| Pin 43 | TEST3 — Test mode input 3 (factory use) |
| Pin 44 | NC — Not connected (per datasheet) |
| Pin 45 | NC — Not connected (per datasheet) |
| Pin 46 | NC — Not connected (per datasheet) |
| Pin 47 | NC — Not connected (per datasheet) |
| Pin 48 | EP — Exposed pad, connect to AGND |
Aplicaciones típicas
MAX1309ECM/V+ es adecuado para 7 aplicacións: Three-Phase Power Metering, Industrial Process Control, Vibration and Acoustic Analysis, Three-Phase Motor Control, Automotive Data Acquisition, Medical Signal Acquisition, Power-Line Monitoring and Protection.
Three-Phase Power Metering
The MAX1309ECM/V+ is purpose-built for three-phase power metering where preserving phase relationships between voltage and current is critical for accurate real-power calculation. Its 4 simultaneous-sampling channels accept the three phase voltages plus neutral current via CTs or shunts, with ±10V true-differential inputs that directly scale CT outputs without external signal conditioning. At 1.075 Msps per channel, the device captures PWM and transient events with sub-microsecond timing resolution. Compared with a multiplexer-based ADC, the simultaneous-sampling architecture eliminates inter-channel phase skew, eliminating the need for software phase correction.
Recomendado
Industrial Process Control
In industrial process control, the MAX1309ECM/V+ digitizes 4 sensor channels (pressure, temperature, flow, level) while providing ±18V over-voltage protection that tolerates common-mode transients on long sensor cables. The 12-bit resolution and 1.075 Msps rate support typical 4-20 mA loop signals after external scaling, with the internal 4.096V reference eliminating external reference drift. The 48-LQFP package enables standard SMT assembly in PLC and DCS analog input modules. Industrial designers value the part for its combination of multi-range inputs (configurable via software for ±10V, ±5V, 0-5V) and the /V+ reliability screening.
Recomendado
Vibration and Acoustic Analysis
For vibration and acoustic analysis, the MAX1309ECM/V+ simultaneously samples 4 accelerometer or microphone channels, preserving time-of-arrival differences that are essential for modal analysis and beamforming. The 1.075 Msps per-channel rate exceeds the Nyquist requirement for audio-bandwidth accelerometers (typically 20 kHz) by 25x, supporting oversampling for improved SNR. The device's 48-LQFP footprint allows dense multi-channel layouts in portable data acquisition modules, while the internal reference eliminates drift-induced calibration issues over temperature. The /V+ grade supports industrial-condition vibration monitoring of rotating machinery.
Recomendado
Three-Phase Motor Control
Three-phase motor control requires precise sampling of phase currents and bus voltage with minimal inter-channel delay, a need that the MAX1309ECM/V+ addresses through 4 simultaneous-sampling 12-bit SAR channels. The device digitizes Ia, Ib, Ic, and Vbus at 1 Msps per channel, enabling field-oriented control (FOC) loops with low torque ripple. The ±10V input range scales directly from shunt amplifiers or current-transformer secondaries, while the parallel 3V interface connects directly to DSP or microcontroller peripherals without level shifters. Designers choose the /V+ grade for automotive traction-motor and industrial servo applications.
Recomendado
Automotive Data Acquisition
The /V+ suffix qualifies the MAX1309ECM/V+ for automotive data acquisition in ECU prototyping, chassis-control development, and powertrain test stands. The 4 channels simultaneously digitize crank position, throttle position, O2 sensor, and knock sensor signals with ±18V over-voltage tolerance that survives load-dump transients. The 48-LQFP package and 3V supply simplify integration with automotive 5V microcontrollers via simple level shifters. The /V+ grade screening and -40°C to +85°C operating range provide the reliability margin required for under-hood and chassis-mounted modules.
Recomendado
Medical Signal Acquisition
In medical signal acquisition such as patient monitoring and bio-impedance measurement, the MAX1309ECM/V+ provides 4 simultaneous-sampling channels that preserve phase relationships across multi-lead ECG or impedance channels. The 12-bit resolution and 1.075 Msps rate are sufficient for diagnostic-quality ECG (typically 1-5 kHz per channel) with significant oversampling margin. The internal 4.096V reference and differential inputs reject common-mode noise from long electrode cables, while the /V+ grade screening supports medical equipment reliability requirements. The 48-LQFP footprint is hand-solderable for prototype medical instrumentation.
Recomendado
Power-Line Monitoring and Protection
Power-line monitoring and protection relays use the MAX1309ECM/V+ to simultaneously digitize three phase voltages plus residual current, capturing fault transients with the part's 1.075 Msps rate and ±18V input protection. The simultaneous-sampling architecture preserves the phase angle information needed for directional power and distance protection algorithms. The 12-bit resolution is sufficient for metering-class measurement, while the internal reference eliminates drift across relay lifetime. The /V+ grade and -40°C to +85°C range support outdoor substation deployment.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX1309ECM/V+ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX1309ECM+ | MAX1304ECM/V+ | MAX1304ECM+ | MAX1310ECM/V+ | MAX1311ECM/V+ |
|---|---|---|---|---|---|---|
| Package | 48-LQFP (7x7) | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same |
| Brand | Analog Devices (Maxim) | Analog Devices (Maxim) - same | Analog Devices (Maxim) - same | Analog Devices (Maxim) - same | Analog Devices (Maxim) - same | Analog Devices (Maxim) - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 14 bits |
| Channels | 4 | 4 | 8 | 8 | 2 | 4 |
| Sample Rate | 1.075 Msps | 1.075 Msps | 1.075 Msps | 1.075 Msps | 1.075 Msps | 1.075 Msps |
| Input Range | ±10V / ±5V / 0-5V | ±10V / ±5V / 0-5V | ±10V / ±5V / 0-5V | ±10V / ±5V / 0-5V | ±10V / ±5V / 0-5V | ±10V / ±5V / 0-5V |
| Grade | /V+ (automotive/high-reliability) | Commercial | /V+ | Commercial | /V+ | /V+ |
| Approximate Unit Price | $14.32 (qty 1) | $18.46 | $16-20 (8-ch, V+ grade) | $15-18 (8-ch) | $13-16 (2-ch) | $17-22 (14-bit) |
Diferenciadores clave
- True simultaneous-sampling 4-channel architecture (frente a MAX1302AEGI+ (single-channel 14-bit))
- Higher-reliability /V+ grade for automotive applications (frente a MAX1309ECM+ (commercial grade))
- On-chip ±18V input over-voltage protection (frente a MAX12528ETK+ (lower input range))
Notas de diseño
Separate analog and digital ground returns with a star connection at the ADC's AGND pin to prevent digital switching noise from coupling into the analog input network. Place 10µF tantalum plus 0.1µF ceramic bypass capacitors as close as possible to each AVDD and DVDD pin. The exposed pad (pin 48) must be soldered to a contiguous AGND copper pour for thermal dissipation and ground reference stability. Estimated: thermal resistance θJA for the 48-LQFP is approximately 35°C/W in still air, so 1W internal dissipation yields 35°C junction rise above ambient.
Route analog input traces differentially and keep them away from digital bus traces to minimize crosstalk. The ±18V over-voltage protection means that inputs can tolerate transients beyond the linear range, but continuous operation in over-range causes self-heating - verify input scaling so normal operating signals stay within the selected ±10V/±5V/0-5V range. Use a low-impedance source (amplifier output, not high-Z sensor) to avoid T/H acquisition-time errors at the 1 Msps conversion rate.
Do not apply external clock above 25 MHz, as the internal conversion timing assumes a maximum 25 MHz CLK input - over-clocking corrupts conversion accuracy. Avoid connecting any of the TEST1/TEST2/TEST3 pins; these are factory-only and should be left floating or tied to ground per the datasheet. The CNVST signal must be clean and monotonic - if driven by a microcontroller GPIO, ensure no glitches during the conversion window. The internal reference requires the REFCAP pin to be bypassed with 10µF to AGND for specified noise performance; omitting this capacitor degrades SNR by 3-6 dB.
The MAX1309ECM/V+ operates from a 3.0V nominal analog supply plus a separate 3.0V digital supply. Power-down mode (PD pin high) reduces supply current to typically <100µA, useful for battery-powered or energy-harvesting applications. Estimated: at 1 Msps with all 4 channels active, supply current is approximately 40 mA (AVDD) plus 5 mA (DVDD), so total system power is around 135 mW. The /V+ grade includes additional screening that does not affect steady-state power consumption.
The 48-LQFP package provides reasonable thermal performance for the part's typical 135 mW dissipation, but in enclosed industrial enclosures at +85°C ambient, the junction temperature should be verified. Estimated: with 135 mW dissipation and θJA of 35°C/W, junction temperature rise is approximately 4.7°C above ambient - well within the 125°C max junction limit. If AVDD is raised or channel count increased (e.g., MAX1304ECM/V+), recalculate thermal budget accordingly.
Información de cumplimiento
RoHS and lead-free per Maxim/Analog Devices product page. /V+ grade denotes internal reliability screening, but the part is not formally AEC-Q100 qualified in the public datasheet. Halogen-free status not explicitly stated in verified data.
