MAX1304ECM/V+ - 12-Bit 8-Ch Simultaneous-Sampling ADC | ADI
MPN: MAX1304ECM/V+ ✓ Hoạt độngMAX1304ECM/V+ Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MAX1304ECM/V+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX1304ECM/V+ (cùng hình factor và footprint) — khác nhau ở Package, Resolution, Operating Temperature Range, RoHS Status, Data Interface.
MAX1304ECM+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1305ECM+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1306ECM+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1307ECM+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1308ECM+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1304ECM/V+ Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 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 |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C (automotive /V+ grade) |
| Hộp | 48-pin LQFP (7 x 7 mm) |
| Kiểu lắp đặt | Surface Mount |
| Power-Down Mode | Software/hardware controlled, low-Iq idle |
| Trạng thái RoHS | Compliant |
Cấu hình chân MAX1304ECM/V+
| Chân 1 | CH0 — Analog input channel 0 |
| Chân 2 | CH1 — Analog input channel 1 |
| Chân 3 | CH2 — Analog input channel 2 |
| Chân 4 | CH3 — Analog input channel 3 |
| Chân 5 | CH4 — Analog input channel 4 |
| Chân 6 | CH5 — Analog input channel 5 |
| Chân 7 | CH6 — Analog input channel 6 |
| Chân 8 | CH7 — Analog input channel 7 |
| Chân 9 | AGND — Analog ground |
| Chân 10 | AVDD — Analog supply (+5 V typical) |
| Chân 11 | REF — Reference bypass / external reference input |
| Chân 12 | REFGND — Reference ground |
| Chân 13 | /PD — Power-down input (active low) |
| Chân 14 | NC — Not connected (per datasheet) |
| Chân 15 | CHAN0 — Channel-select bit 0 input |
| Chân 16 | CHAN1 — Channel-select bit 1 input |
| Chân 17 | CHAN2 — Channel-select bit 2 input |
| Chân 18 | /CNVT — Convert start input (active low) |
| Chân 19 | EOC — End-of-conversion output |
| Chân 20 | DGND — Digital ground |
| Chân 21 | DVDD — Digital supply (+3.3 V typical) |
| Chân 22 | D11 — Digital data bit 11 (MSB) |
| Chân 23 | D10 — Digital data bit 10 |
| Chân 24 | D9 — Digital data bit 9 |
| Chân 25 | D8 — Digital data bit 8 |
| Chân 26 | D7 — Digital data bit 7 |
| Chân 27 | D6 — Digital data bit 6 |
| Chân 28 | D5 — Digital data bit 5 |
| Chân 29 | D4 — Digital data bit 4 |
| Chân 30 | D3 — Digital data bit 3 |
| Chân 31 | D2 — Digital data bit 2 |
| Chân 32 | D1 — Digital data bit 1 |
| Chân 33 | D0 — Digital data bit 0 (LSB) |
| Chân 34 | NC — Not connected (per datasheet) |
| Chân 35 | RD — Read strobe input |
| Chân 36 | /CS — Chip-select input (active low) |
| Chân 37 | WR — Write strobe input |
| Chân 38 | NC — Not connected (per datasheet) |
| Chân 39 | AVSS — Analog negative supply (-5 V typical for ±10 V range) |
| Chân 40 | AGND — Analog ground |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
| Chân 45 | NC — Not connected (per datasheet) |
| Chân 46 | AGND — Analog ground |
| Chân 47 | AVDD — Analog supply |
| Chân 48 | DGND — Digital ground |
Ứng dụng tiêu biểu
MAX1304ECM/V+ phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX1304ECM/V+ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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) |
Bảo phân biệt quan trọng
- True 8-channel simultaneous sampling with dedicated T/H per channel (vsMAX1305ECM+)
- Automotive-grade -40 °C to +85 °C /V+ temperature range (vsMAX1304ECM+)
- 1.075 Msps per-channel throughput with bipolar ±10 V input range (vsMAX1307ECM+)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
