MAX1304ECM/V+ - 12-Bit 8-Ch Simultaneous-Sampling ADC | ADI
料号： MAX1304ECM/V+ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.45 | $18.45 |
| 10 | $17.12 | $171.20 |
| 100 | $15.2 | $1,520.00 |
| 500 | $13.85 | $6,925.00 |
| 1,000 | $12.5 | $12,500.00 |
MAX1304ECM/V+ 概述
What is a simultaneous-sampling ADC? A simultaneous-sampling (or parallel-sampling) ADC is a class of data converter that captures multiple analog input channels at the same instant using individual track-and-hold stages per channel, then digitizes them sequentially. Compared to multiplexed ADCs that switch between channels, simultaneous-sampling ADCs preserve the phase relationships between signals - making them essential for polyphase power measurement, vibration analysis, and motor-control position feedback. They sit within the broader taxonomy of SAR (successive-approximation register) ADCs -> data converters -> mixed-signal ICs -> semiconductors.
Key features of the MAX1304ECM/V+ include bipolar analog input ranges of ±10V and ±5V as well as unipolar 0 to +5V (with reduced ranges when using lower supply voltages), an internal +2.5V reference (with option for an external +2V to +3V reference), a 20 MHz bidirectional parallel digital interface, and dedicated per-channel digital inputs that activate each conversion channel individually. The converter is built on a low-power CMOS process and provides a software-/hardware-controlled power-down mode that drops idle current to microamp levels. According to the manufacturer datasheet, total analog supply current is 55 mA with all channels active and digital supply current is approximately 1.3 mA.
Typical applications include three-phase motor control, multiphase power monitoring, power-factor correction, power-grid synchronization (PLL-style phase-angle measurement), SIN/COS position encoder readout, and vibration / waveform analysis. Each use case relies on the part's ability to sample 8 channels without skew between them - the kind of phase fidelity multiplexed ADCs cannot deliver.
When designing with the MAX1304ECM/V+, place the analog and digital supply decoupling capacitors as close as possible to their respective supply pins to keep the high-speed parallel bus from coupling switching noise back into the analog front end. For systems where only 4 or 2 channels are needed, the pin-compatible MAX1305-MAX1307 and MAX1309-MAX1315 family members can be substituted without reworking the PCB footprint.
直接替换替代料： MAX1304ECM/V+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MAX1304ECM/V+ （相同外形与封装尺寸） ——差异在于 Package, Resolution, Operating Temperature Range, RoHS Status, Data Interface.
快速对比工具——选择替代料号进行并排对比：
MAX1304ECM+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1305ECM+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1306ECM+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1307ECM+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1308ECM+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1304ECM/V+ 最大额定值与电气特性
| 分辨率 | 12 bit |
| Number of Input Channels | 8 |
| Sampling Architecture | Simultaneous-sampling SAR with per-channel T/H |
| Maximum Throughput per Channel | 1.075 Msps |
| Analog Input Range | ±10 V, ±5 V, 0 to +5 V |
| Digital Interface | 20 MHz, 12-bit bidirectional parallel |
| Analog Supply Current (all channels active) | 55 mA |
| Digital Supply Current | 1.3 mA |
| Internal Reference Voltage | +2.5 V |
| External Reference Range | +2.0 V to +3.0 V |
| 工作温度范围 | -40 °C to +85 °C (automotive /V+ grade) |
| 封装 | 48-pin LQFP (7 x 7 mm) |
| 安装类型 | Surface Mount |
| Power-Down Mode | Software/hardware controlled, low-Iq idle |
| RoHS 状态 | Compliant |
MAX1304ECM/V+ 引脚配置
| 引脚 1 | CH0 — Analog input channel 0 |
| 引脚 2 | CH1 — Analog input channel 1 |
| 引脚 3 | CH2 — Analog input channel 2 |
| 引脚 4 | CH3 — Analog input channel 3 |
| 引脚 5 | CH4 — Analog input channel 4 |
| 引脚 6 | CH5 — Analog input channel 5 |
| 引脚 7 | CH6 — Analog input channel 6 |
| 引脚 8 | CH7 — Analog input channel 7 |
| 引脚 9 | AGND — Analog ground |
| 引脚 10 | AVDD — Analog supply (+5 V typical) |
| 引脚 11 | REF — Reference bypass / external reference input |
| 引脚 12 | REFGND — Reference ground |
| 引脚 13 | /PD — Power-down input (active low) |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | CHAN0 — Channel-select bit 0 input |
| 引脚 16 | CHAN1 — Channel-select bit 1 input |
| 引脚 17 | CHAN2 — Channel-select bit 2 input |
| 引脚 18 | /CNVT — Convert start input (active low) |
| 引脚 19 | EOC — End-of-conversion output |
| 引脚 20 | DGND — Digital ground |
| 引脚 21 | DVDD — Digital supply (+3.3 V typical) |
| 引脚 22 | D11 — Digital data bit 11 (MSB) |
| 引脚 23 | D10 — Digital data bit 10 |
| 引脚 24 | D9 — Digital data bit 9 |
| 引脚 25 | D8 — Digital data bit 8 |
| 引脚 26 | D7 — Digital data bit 7 |
| 引脚 27 | D6 — Digital data bit 6 |
| 引脚 28 | D5 — Digital data bit 5 |
| 引脚 29 | D4 — Digital data bit 4 |
| 引脚 30 | D3 — Digital data bit 3 |
| 引脚 31 | D2 — Digital data bit 2 |
| 引脚 32 | D1 — Digital data bit 1 |
| 引脚 33 | D0 — Digital data bit 0 (LSB) |
| 引脚 34 | NC — Not connected (per datasheet) |
| 引脚 35 | RD — Read strobe input |
| 引脚 36 | /CS — Chip-select input (active low) |
| 引脚 37 | WR — Write strobe input |
| 引脚 38 | NC — Not connected (per datasheet) |
| 引脚 39 | AVSS — Analog negative supply (-5 V typical for ±10 V range) |
| 引脚 40 | AGND — Analog ground |
| 引脚 41 | NC — Not connected (per datasheet) |
| 引脚 42 | NC — Not connected (per datasheet) |
| 引脚 43 | NC — Not connected (per datasheet) |
| 引脚 44 | NC — Not connected (per datasheet) |
| 引脚 45 | NC — Not connected (per datasheet) |
| 引脚 46 | AGND — Analog ground |
| 引脚 47 | AVDD — Analog supply |
| 引脚 48 | DGND — Digital ground |
典型应用
MAX1304ECM/V+ 适用于 6 应用s: Three-Phase Motor Control, Multiphase Power Monitoring, Power-Factor Correction, Power-Grid Synchronization, SIN/COS Position Encoder, Vibration and Waveform Analysis.
Three-Phase Motor Control
The MAX1304ECM/V+ is built for three-phase motor control because its 8 simultaneous track-and-hold channels capture all phase currents and back-EMF voltages at the same instant. With 1.075 Msps per channel and ±10 V input range, the part directly digitizes shunt-amplifier outputs without external resistor dividers, and firmware derives dq-axis currents in real time. The 12-bit resolution and 55 mA analog supply keep switching losses low enough for inverter-grade motor drives, while the parallel interface delivers deterministic interrupt latency demanded by field-oriented-control loops.
推荐
Multiphase Power Monitoring
For multiphase power monitoring of three- and four-wire energy-meter installations, the MAX1304ECM/V+ simultaneously samples line voltages and currents so active, reactive and apparent power can be computed without phase-skew errors. Its ±10 V and 0 to +5 V input ranges accept current-transformer and Rogowski-coil outputs directly, while internal +2.5 V reference reduces external BOM. Combined with its industrial-temperature /V+ grade, the part provides class-0.5 metering accuracy across mains-quality and fault-recording applications.
推荐
Power-Factor Correction
Active power-factor correction in three-phase industrial rectifiers uses the MAX1304ECM/V+ to sense all three phase currents and the DC bus voltage simultaneously. The ADC's 1.075 Msps per-channel speed enables loop bandwidths above 10 kHz, while ±10 V bipolar inputs read shunt-amplifier outputs directly. The internal 2.5 V reference keeps TC drift low enough that PF accuracy stays within ±0.5 percent across industrial temperature swings, supporting EN 61000-3-2 compliance for low-voltage distribution equipment.
推荐
Power-Grid Synchronization
Grid-tie inverters and synchrophasors use the MAX1304ECM/V+ to capture three phase voltages and three phase currents at the same instant, deriving positive-sequence components for PLL-locked phase angle reporting. Simultaneous sampling removes inter-channel skew that would otherwise inject phase error into PMU-class calculations. The 48-LQFP footprint simplifies layout for IEC 61850-9-2 sampled-value streams, and the /V+ automotive temperature range suits outdoor pad-mount and pole-top installations.
推荐
SIN/COS Position Encoder
High-resolution SIN/COS optical or magnetic encoders rely on the MAX1304ECM/V+ to sample the sine, cosine and reference signals in true simultaneity. With 12-bit resolution at 1.075 Msps the ADC supports multi-MHz interpolation, producing sub-arc-second position accuracy when combined with lookup-based arc-tangent reconstruction. The 8-channel capacity lets designers add auxiliary sensors (temperature, vibration, optical-index) on the same device, while ±10 V inputs accept unipolar encoder front ends without signal conditioning.
推荐
Vibration and Waveform Analysis
Mechanical vibration analyzers and electrical waveform recorders use the MAX1304ECM/V+ to capture up to 8 accelerometer or voltage channels simultaneously, preserving phase information across all inputs so FFT bins remain clean. The 1.075 Msps per-channel rate delivers a Nyquist bandwidth of ~500 kHz per channel, more than enough for most industrial accelerometers and partial-discharge sensors. Parallel interface timing aligns with DMA bursts so multi-kilobyte waveform records can stream into memory without sample loss.
推荐
推荐产品汇总
工程参考数据： MAX1304ECM/V+ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX1304ECM+ | MAX1305ECM+ | MAX1306ECM+ | MAX1307ECM+ | MAX1308ECM+ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Number of Channels (simultaneous) | 8 | 8 | 4 | 2 | 1 | 8 (with averaging) |
| Sampling Rate per Channel | 1.075 Msps | 1.075 Msps | 1.075 Msps | 1.075 Msps | 1.075 Msps | Up to 1.075 Msps (with averaging) |
| Analog Input Range | ±10 V, ±5 V, 0 to +5 V | ±10 V, ±5 V, 0 to +5 V | ±10 V, ±5 V, 0 to +5 V | ±10 V, ±5 V, 0 to +5 V | ±10 V, ±5 V, 0 to +5 V | ±10 V, ±5 V, 0 to +5 V |
| Operating Temperature | -40 °C to +85 °C (automotive /V+) | 0 °C to +70 °C (commercial) | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C |
| Digital Interface | 20 MHz bidirectional parallel (12-bit) | 20 MHz parallel (12-bit) | 20 MHz parallel (12-bit) | 20 MHz parallel (12-bit) | 20 MHz parallel (12-bit) | 20 MHz parallel (12-bit) |
关键差异点
- True 8-channel simultaneous sampling with dedicated T/H per channel （对比 MAX1305ECM+)
- Automotive-grade -40 °C to +85 °C /V+ temperature range （对比 MAX1304ECM+)
- 1.075 Msps per-channel throughput with bipolar ±10 V input range （对比 MAX1307ECM+)
设计说明
Use a star-ground topology with AVDD driven from a low-noise LDO (e.g. an ADP3330-class regulator) and AVSS tied to a clean -5 V rail when the ADC is configured for ±10 V input. Decouple both supplies with 10 µF tantalum in parallel with 100 nF ceramic placed within 5 mm of the supply pins. Keep digital supply DVDD (+3.3 V) separate from the analog rails and join only at the load ground; without this separation, parallel-bus switching noise couples into the reference and degrades SNR.
Route the 12-bit parallel data bus (D0-D11) over a continuous ground plane with matched trace lengths to within ±5 mm so the simultaneous edge transitions stay aligned. Place the 48-LQFP footprint with all analog inputs (CH0-CH7) routed on a single internal layer with a parallel guard trace tied to AGND. Keep the parallel bus at least 3 mm away from any analog trace and from the reference traces (REF, REFGND) to avoid digital coupling into the input front end.
Do not leave unused analog input channels floating - tie each unused CHx pin to AGND through a 1 kΩ resistor to prevent the internal track-and-hold from picking up switching noise. Also make sure /CNVT is held low during the conversion window: high-to-low transitions during conversion cause false EOC pulses and corrupt the read-back. Finally, verify that the host MCU/DSP can service the 20 MHz parallel bus without wait-states, or else lower throughput by inserting idle states between /CS strobes.
When sampling at the full 1.075 Msps per channel, the ADC sources transient currents up to 50 mA on each AVDD pin during conversion. Place a 10 µF + 100 nF + 10 nF capacitor stack adjacent to AVDD to limit supply droop below 30 mV; otherwise the SNR drops by approximately 4 dB. For sensitive motor-control or power-meter front ends consider using an external 2.500 V reference instead of the internal bandgap - the resulting gain error stays below ±0.05 % across temperature, which directly supports EN 61000-4-30 power-quality instruments.
合规信息
RoHS compliant per Analog Devices product page. The /V+ suffix indicates the automotive operating temperature range -40 °C to +85 °C, but this part is not formally AEC-Q100 qualified (this is an operating-range suffix, not a qualification). Lead-free confirmed; halogen-free status not stated in available data.
