AD7265BCPZ-REEL - Dual 1MSPS 12-Bit SAR ADC | Analog Devices
MPN: AD7265BCPZ-REEL ✓ Hoạt độngAD7265BCPZ-REEL Tóm tắt
A SAR ADC (Successive Approximation Register ADC) is a precision converter architecture that uses an internal binary-search algorithm and a precision DAC to digitize an analog input one bit at a time per conversion clock. Compared with flash or pipelined ADCs, SAR ADCs trade raw speed for exceptional linearity, very low latency, and low power consumption, which is why they are commonly used in industrial control loops, motor drives, and multi-channel data-acquisition front ends.
Key features include on-chip 2.5 V reference (overdrivable by an external 100 mV to VDD reference), two simultaneous-sampling ADCs with separate SDATA outputs, differential input ranges of 0 V to VREF and 0 V to 2xVREF, and a flexible serial interface compatible with 5 V or 3 V logic. The wide-bandwidth track-and-hold supports inputs well beyond the Nyquist limit, simplifying front-end analog filtering.
The part targets space-constrained multi-channel designs: two complete 3-channel ADCs in one package replace two discrete converter ICs, saving PCB area in dense signal-conditioning layouts such as motor-control and multi-axis sensor systems. The AD7265 ships in two package options - 32-lead LFCSP (CP suffix) and 32-lead TQFP (SU suffix).
Typical applications include industrial process control, motor-control current sensing, simultaneous multi-axis data acquisition, instrumentation, and battery-powered portable measurement. With simultaneous sampling and dual serial outputs, the AD7265 supports deterministic, low-latency conversion of related analog signals.
Bộ thay thế dễ dàng lắp đặt cho AD7265BCPZ-REEL — 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 AD7265BCPZ-REEL (cùng hình factor và footprint) — khác nhau ở Package, Number of Channels, Supply Voltage, Resolution, Data Interface.
AD7265BCPZ-REEL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7265BCPZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7265BSUZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7264BSTZ-5-RL7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7266BCPZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7265BCPZ-REEL Tỷ lệ tối đa & tính chất điện
| Architecture | SAR (Successive Approximation) |
| Number of Bits | 12 bits |
| Number of Channels | 2 ADCs x 3 inputs each = 6/12 inputs |
| Sample Rate | 1 MSPS (per ADC) |
| Điện áp cung cấp | 2.7 V to 5.25 V (single) |
| Input Range | 0 V to VREF or 0 V to 2xVREF, differential |
| Internal Reference | 2.5 V (overdrivable, 100 mV to VDD external) |
| Input Bandwidth (Track-and-Hold) | >30 MHz |
| Giao diện | Serial (SPI-compatible, two SDATA outputs) |
| Hộp | 32-lead LFCSP-VQ (5x5 mm) - CP suffix |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Reel Quantity | REEL: 1,500 per reel |
Cấu hình chân AD7265BCPZ-REEL
| Chân 1 | VA1 — Analog input A1 (ADC-A channel 1) |
| Chân 2 | VA2 — Analog input A2 (ADC-A channel 2) |
| Chân 3 | VA3 — Analog input A3 (ADC-A channel 3) |
| Chân 4 | AGND — Analog ground |
| Chân 5 | VB1 — Analog input B1 (ADC-B channel 1) |
| Chân 6 | VB2 — Analog input B2 (ADC-B channel 2) |
| Chân 7 | VB3 — Analog input B3 (ADC-B channel 3) |
| Chân 8 | AGND — Analog ground |
| Chân 9 | REFIN/REFOUT — Internal 2.5 V reference output / external reference input |
| Chân 10 | REFGND — Reference ground |
| Chân 11 | VDD — Analog supply voltage (2.7 V to 5.25 V) |
| Chân 12 | AGND — Analog ground |
| Chân 13 | VDRIVE — Logic supply for serial interface (1.8 V to VDD) |
| Chân 14 | DGND — Digital ground |
| Chân 15 | DOUTA — ADC-A serial data output |
| Chân 16 | DOUTB — ADC-B serial data output |
| Chân 17 | SCLK — Serial interface clock |
| Chân 18 | /CS — Chip select (active low) |
| Chân 19 | DGND — Digital ground |
| Chân 20 | NC — Not connected (per datasheet) |
| Chân 21 | NC — Not connected (per datasheet) |
| Chân 22 | NC — Not connected (per datasheet) |
| Chân 23 | NC — Not connected (per datasheet) |
| Chân 24 | NC — Not connected (per datasheet) |
| Chân 25 | NC — Not connected (per datasheet) |
| Chân 26 | NC — Not connected (per datasheet) |
| Chân 27 | NC — Not connected (per datasheet) |
| Chân 28 | NC — Not connected (per datasheet) |
| Chân 29 | NC — Not connected (per datasheet) |
| Chân 30 | NC — Not connected (per datasheet) |
| Chân 31 | NC — Not connected (per datasheet) |
| Chân 32 | NC — Not connected (per datasheet) |
| Chân 33 | EP — Exposed pad (solder to analog ground for thermal/electrical performance) |
Ứng dụng tiêu biểu
AD7265BCPZ-REEL phù hợp cho 6 Áp dụngs: Motor Control Current Sensing, Industrial Process Control, Multi-Axis Data Acquisition Systems, Instrumentation and Test Equipment, Battery-Powered Portable Measurement, Power Line Monitoring and Energy Metering.
Motor Control Current Sensing
The AD7265BCPZ-REEL is ideal for motor-control current sensing because it integrates two simultaneous-sampling 12-bit SAR ADCs at 1 MSPS each in a single 32-lead LFCSP-VQ package. In a three-phase brushless DC or permanent-magnet synchronous motor drive, two phase currents must be sampled at the exact same instant - hardware synchronization between ADC-A and ADC-B eliminates the phase error that software-sequential ADCs introduce, while the 30 MHz+ track-and-hold bandwidth preserves accuracy on the fast-switching current shunts. Both ADC cores run from a single 2.7 V to 5.25 V supply, simplifying board design versus two-chip solutions. Designers should use the internal 2.5 V reference (or an external low-drift reference) and place 0.1 uF ceramic bypass caps close to VDD/VDRIVE. The serial interface with two SDATA pins allows a single DSP/MCU to capture both phase currents with deterministic timing, reducing CPU overhead in field-oriented control loops.
Được đề xuất
Industrial Process Control
In industrial process control loops, the AD7265BCPZ-REEL digitizes 4-20 mA-derived voltage signals with 12-bit resolution and 1 MSPS throughput, providing the speed and accuracy needed for PID loop feedback. Each ADC's 3-channel multiplexer accommodates multiple sensor inputs, so a single chip can digitize up to six analog measurements (two 3-channel ADCs) from pressure, temperature, or flow sensors. The 2.7 V to 5.25 V supply range accepts common 3.3 V and 5 V industrial rails, and the differential input range (0 V to VREF or 0 V to 2xVREF) supports both unipolar and bipolar sensor outputs. The on-chip 2.5 V reference - or any external reference from 100 mV to VDD - allows tight calibration without external precision components, while the LFCSP-32 footprint (5x5 mm) keeps the converter footprint small in dense PLC analog input modules.
Được đề xuất
Multi-Axis Data Acquisition Systems
Multi-axis data acquisition systems benefit from the AD7265BCPZ-REEL because it provides two independent 12-bit SAR ADCs that can sample related signals at the same instant, which is essential when capturing vibration, force, or position data from correlated axes. Each ADC accepts up to three multiplexed inputs, so the part digitizes up to six channels in a compact 32-lead LFCSP-VQ footprint. The 30 MHz+ track-and-hold bandwidth ensures that fast transients (such as accelerometer output peaks) are captured without slew-induced distortion, while the SPI-compatible serial interface with two SDATA outputs allows efficient DMA transfers to an FPGA or MCU. Designers can use the 1 MSPS per channel rate for vibration analysis up to ~400 kHz bandwidth, and the 12-bit resolution provides 72 dB of dynamic range - adequate for most industrial and instrumentation data-acquisition cards.
Được đề xuất
Instrumentation and Test Equipment
The AD7265BCPZ-REEL serves well in bench-top and portable instrumentation thanks to its dual 1 MSPS SAR cores, 30 MHz+ track-and-hold bandwidth, and small LFCSP-32 footprint. A single chip digitizes two channels of a scope, spectrum analyzer, or arbitrary waveform generator feedback path at full 1 MSPS - enough bandwidth for audio-frequency and ultrasonic instrumentation. The 2.7 V to 5.25 V supply and low power dissipation allow portable battery-powered designs, while the differential input range (0 to VREF, 0 to 2xVREF) supports both ground-referenced and floating sensor sources. The internal 2.5 V reference with overdrive capability allows designers to use a precision external reference for calibrated measurements, while the SPI serial output keeps pin count low for dense instrument front-end PCBs.
Được đề xuất
Battery-Powered Portable Measurement
The AD7265BCPZ-REEL supports battery-powered portable measurement systems because each ADC draws minimal supply current and operates down to 2.7 V, allowing direct connection to single-cell Li-ion or two-AA battery stacks. The simultaneous sampling capability is useful for handheld multimeters and portable diagnostic equipment that must capture correlated inputs (voltage and current, for instance) at the exact same instant. With a 32-lead LFCSP-VQ package measuring only 5x5 mm, the converter fits inside space-constrained handheld enclosures. The internal 2.5 V reference eliminates the need for an external reference IC, reducing both board area and standby current - critical for battery life. Designers should put the device in power-down mode between conversions to extend runtime.
Được đề xuất
Power Line Monitoring and Energy Metering
The AD7265BCPZ-REEL is a strong fit for power-line monitoring and energy-metering front ends, where simultaneous sampling of voltage and current waveforms is fundamental to accurate real-power calculation. The dual 12-bit SAR ADC architecture allows both voltage and current channels to be digitized at the same instant (no phase skew), preserving measurement accuracy even at higher harmonic frequencies. The differential input range (0 to VREF, 0 to 2xVREF) accepts current-transformer outputs and resistive shunts directly with simple signal conditioning. With a 2.7 V to 5.25 V supply and LFCSP-32 footprint, the converter fits in compact single-phase or three-phase meter designs, while the SPI interface with two SDATA outputs lets the metrology MCU fetch both waveform streams with deterministic timing for RMS and harmonic calculations up to the 63rd harmonic.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7265BCPZ-REEL — 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 | AD7265BCPZ-REEL7 | AD7265BCPZ | AD7264BSTZ-5-RL7 | AD7266BCPZ |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | LFCSP-32 (5x5 mm) | LFCSP-32 (5x5 mm) - same | LFCSP-32 (5x5 mm) - same | LFCSP-32 (5x5 mm) - same | LFCSP-32 (5x5 mm) - same |
| Resolution | 12 bits | 12 bits | 12 bits | 14 bits | 12 bits |
| Sample Rate | 1 MSPS per ADC | 1 MSPS per ADC | 1 MSPS per ADC | 1 MSPS per ADC | 2 MSPS per ADC (+100%) |
| Number of ADCs | 2 (with 3-channel mux each) | 2 (with 3-channel mux each) | 2 (with 3-channel mux each) | 2 (with 3-channel mux each) | 2 (with 3-channel mux each) |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V |
| Input Bandwidth (T/H) | >30 MHz | >30 MHz | >30 MHz | >30 MHz | >30 MHz |
| Internal Reference | 2.5 V (overdrivable) | 2.5 V (overdrivable) | 2.5 V (overdrivable) | 2.5 V (overdrivable) | 2.5 V (overdrivable) |
| Reel Quantity | 1,500 (REEL) | 1,500 (REEL7) | Tray (no reel) | 1,500 (RL7) | REEL/tray depending on suffix |
Bảo phân biệt quan trọng
- Higher speed sister ADC available in same footprint (vsAD7266BCPZ)
- Higher-resolution sister ADC available in same footprint (vsAD7264BSTZ-5-RL7)
- Multiple reel format options for inventory flexibility (vsAD7265BCPZ-REEL7 vs AD7265BCPZ)
Ghi chú thiết kế
Decouple VDD with a 10 uF tantalum or ceramic bulk cap plus a 0.1 uF X7R ceramic placed within 5 mm of the VDD pin. Place a separate 0.1 uF cap on VDRIVE and tie the analog and digital ground planes together only at the exposed pad (EP) of the LFCSP. The exposed pad must be soldered to a low-impedance analog ground copper pour that is at least 25 mm x 25 mm to provide thermal dissipation and a low-inductance ground return.
When using the internal 2.5 V reference, do not place any external load on REFIN/REFOUT other than the recommended 10 nF bypass cap to REFGND, as additional load will degrade ADC linearity and increase gain error. If higher accuracy is required, drive REFIN from a low-noise external reference such as ADR4525 or ADR01, but verify that the external reference voltage does not exceed VDD. For motor-control or instrumentation applications that require AC accuracy, avoid running long analog input traces parallel to digital traces; route them on opposite sides of the ground plane.
Drive the SCLK signal from a low-impedance microcontroller pin (not a high-impedance gate) and keep the trace length under 50 mm to minimize ringing on the serial interface. Place a 33 ohm series resistor close to the DOUTA/DOUTB pins if the SCLK frequency is above 30 MHz or the digital traces exceed 50 mm. For simultaneous sampling, both ADCs share SCLK and /CS but have independent SDATA lines; ensure both data outputs are captured on the same SCLK edge to maintain phase alignment between ADC-A and ADC-B.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. MSL-3 moisture sensitivity per JEDEC J-STD-020. Not AEC-Q100 qualified; this part is targeted at industrial and consumer markets, not automotive.
