AD7675ACPZRL - 16-Bit 100kSPS Differential SAR ADC | Analog Devices
MPN: AD7675ACPZRL ✓ Hoạt độngAD7675ACPZRL Tóm tắt
A SAR ADC is a precision converter that resolves a sampled analog voltage one bit per clock cycle using a binary-weighted capacitor network and a comparator, settling to its final code without pipeline latency. The AD7675 belongs to the broader ADC family -> data converters -> mixed-signal ICs -> semiconductors, and is targeted at precision multi-channel data-acquisition front ends where DC accuracy and AC linearity must coexist.
Key features include 94 dB typical SNR at 45 kHz input, -110 dB typical THD at 45 kHz, both AC and DC specified performance, parallel (8-/16-bit) and serial 5 V/3 V logic interfaces, SPI-/QSPI-/MICROWIRE-/DSP-compatible serial modes, single 5 V analog supply operation, and 15 mW typical power dissipation at 100 kSPS. The LFCSP-48 exposed pad keeps thermal resistance low enough for the 15 mW dissipation without an external heat sink.
The internal architecture combines a high-bandwidth differential track-and-hold, a precision 16-bit charge-redistribution SAR core, and an on-chip reference buffer. The lack of pipeline delay makes the part immediately usable in multiplexed systems, servo loops, and event-triggered sampling applications where latency must be deterministic.
Typical applications include industrial process control and data acquisition, medical instrumentation, spectrum and vibration analysis, automated test equipment (ATE), and precision multi-channel instrumentation. The bipolar ±2.5 V input also simplifies direct connection to load-cell bridges and thermocouple front-ends after signal conditioning.
When designing with this device, pair the analog supply with a 10 uF + 0.1 uF decoupling network placed within 5 mm of the AVDD pin, and solder the exposed pad to a continuous ground pour to achieve the rated thermal performance. Source-impedance should remain below 50 ohm to avoid degrading THD at the rated sample speed.
Bộ thay thế dễ dàng lắp đặt cho AD7675ACPZRL — 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 AD7675ACPZRL (cùng hình factor và footprint) — khác nhau ở Data Interface, Operating Temperature, Input Voltage Range, No Missing Codes, Number of Channels.
AD7675ACPZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7675BCPZRL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7674ACPZRL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7650ACPZRL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7641BCPZRL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS8481IRGZR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7675ACPZRL Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 16 Bits |
| Number of ADC Channels | 1 (Differential) |
| Converter Type | SAR (Successive Approximation Register) |
| Throughput / Sample Rate | 100 kSPS |
| Differential Input Range | ±2.5 V |
| Integral Nonlinearity (INL) | 1.5 LSB Max (0.0015% of FS) |
| Signal-to-Noise + Distortion (SINAD) | 94 dB typ @ 45 kHz |
| Total Harmonic Distortion (THD) | -110 dB typ @ 45 kHz |
| No Missing Codes | 16 Bits, Guaranteed |
| Data Interface | Parallel (8/16-bit) and Serial (SPI/QSPI/MICROWIRE/DSP-compatible) |
| Logic Interface Voltage | 5 V / 3 V |
| Analog Supply Voltage | 5 V single supply |
| Power Dissipation | 15 mW typical @ 100 kSPS |
| Hộp / Vỏ | 48-LFCSP-VQ (7x7 mm) with Exposed Pad |
| Packaging | Tape & Reel (TR) |
| Pipeline Delay | None (SAR architecture) |
| Trạng thái RoHS | Compliant |
Cấu hình chân AD7675ACPZRL
| Chân 1 | DVDD — Digital supply (3V/5V) |
| Chân 2 | OGND — Digital ground |
| Chân 3 | DB0 — Data bit 0 (LSB), parallel mode |
| Chân 4 | DB1 — Data bit 1, parallel mode |
| Chân 5 | DB2 — Data bit 2, parallel mode |
| Chân 6 | DB3 — Data bit 3, parallel mode |
| Chân 7 | DB4 — Data bit 4, parallel mode |
| Chân 8 | DB5 — Data bit 5, parallel mode |
| Chân 9 | DB6 — Data bit 6, parallel mode |
| Chân 10 | DB7 — Data bit 7, parallel mode |
| Chân 11 | DB8 — Data bit 8, parallel mode (high byte) |
| Chân 12 | DB9 — Data bit 9, parallel mode |
| Chân 13 | DB10 — Data bit 10, parallel mode |
| Chân 14 | DB11 — Data bit 11, parallel mode |
| Chân 15 | DB12 — Data bit 12, parallel mode |
| Chân 16 | DB13 — Data bit 13, parallel mode |
| Chân 17 | DB14 — Data bit 14, parallel mode |
| Chân 18 | DB15 — Data bit 15 (MSB), parallel mode |
| Chân 19 | DGND — Digital ground |
| Chân 20 | SER/PAR — Interface mode select (serial/parallel) |
| Chân 21 | OB/2C — Output coding / 2's complement select |
| Chân 22 | WARP — Warp/normal mode select |
| Chân 23 | IMPULSE — Impulse/normal mode select |
| Chân 24 | CS — Chip select input |
| Chân 25 | RD — Read input (parallel mode) |
| Chân 26 | WR — Write / start conversion input |
| Chân 27 | BUSY — Conversion in progress output |
| Chân 28 | DCEN — Daisy-chain enable |
| Chân 29 | SDOUT — Serial data output |
| Chân 30 | SCLK — Serial clock input |
| Chân 31 | SYNC — Synchronization input (serial mode) |
| Chân 32 | DGND — Digital ground |
| Chân 33 | AVDD — Analog supply (5V) |
| Chân 34 | AGND — Analog ground |
| Chân 35 | IN+ — Differential analog input positive |
| Chân 36 | IN- — Differential analog input negative |
| Chân 37 | REF — Reference voltage input (decouple) |
| Chân 38 | REFGND — Reference ground |
| Chân 39 | CAPB — Bypass capacitor, reference buffer |
| Chân 40 | CAPA — Bypass capacitor, reference buffer |
| Chân 41 | AGND — Analog ground |
| Chân 42 | AGND — Analog ground |
| Chân 43 | NC — Not connected |
| Chân 44 | NC — Not connected |
| Chân 45 | NC — Not connected |
| Chân 46 | NC — Not connected |
| Chân 47 | NC — Not connected |
| Chân 48 | EP — Exposed pad (must be soldered to AGND) |
Ứng dụng tiêu biểu
AD7675ACPZRL phù hợp cho 6 Áp dụngs: Industrial Process Control & Data Acquisition, Medical Instrumentation & Patient Monitoring, Spectrum & Vibration Analysis, Automated Test Equipment (ATE) & Instrumentation, Precision Multi-Channel Instrumentation Modules, Power-Line Monitoring & Industrial Sensors.
Industrial Process Control & Data Acquisition
The AD7675ACPZRL's 16-bit resolution with 1.5 LSB INL max and ±2.5 V bipolar differential input range suit it directly to industrial process-control front ends. Designers commonly pair the ADC with the AD8275 or AD8421 instrumentation amplifier for 4-20 mA loop and bridge-transducer signal conditioning; the converter's 100 kSPS rate and zero pipeline delay enable deterministic loop-cycle sampling. The 48-LFCSP-VQ footprint and 15 mW dissipation keep thermal and PCB real-estate budgets reasonable even in dense multi-channel modules.
Được đề xuất
Medical Instrumentation & Patient Monitoring
In medical instrumentation such as patient monitors, infusion-pump sensors, and bench-top analyzers, the AD7675ACPZRL's 94 dB SINAD at 45 kHz preserves diagnostic signal integrity while the ±2.5 V bipolar input accepts biopotential and bridge signals directly. The deterministic zero-pipeline-delay conversion is critical when the instrument must react to an event within a defined sample window. Combined with the 48-LFCSP-VQ 7x7 mm footprint and 15 mW dissipation, the part fits compact portable medical devices that require IEC 60601-grade analog front ends.
Được đề xuất
Spectrum & Vibration Analysis
The AD7675ACPZRL's -110 dB THD at 45 kHz and 100 kSPS throughput make it well suited to spectrum and vibration analysis of audio-bandwidth mechanical and acoustic signals. Designers commonly pair the ADC with an anti-aliasing low-pass filter followed by an FFT in a DSP or FPGA; the zero pipeline delay simplifies block-based acquisition timing. The exposed-pad 48-LFCSP-VQ package also keeps the noise-sensitive analog ground path tightly controlled, preserving SFDR in dense multi-channel analyzers.
Được đề xuất
Automated Test Equipment (ATE) & Instrumentation
For automated test equipment and precision bench instruments, the AD7675ACPZRL delivers 16-bit precision with 1.5 LSB INL max from a single 5 V supply, simplifying ATE pin-electronics channel design. The dual parallel/serial 5 V/3 V interface lets the same PCB serve both legacy parallel DSPs and modern SPI-controlled MCUs. Zero pipeline delay enables deterministic stimulus-response timing in production test fixtures, while 15 mW dissipation supports high-channel-count ATE backplanes without thermal concerns.
Được đề xuất
Precision Multi-Channel Instrumentation Modules
In multi-channel precision instrumentation modules - such as weighing scales, load-cell readouts, and strain-gauge data loggers - the AD7675ACPZRL's ±2.5 V bipolar differential input directly digitizes full-bridge sensor outputs without external level shifting. Designers commonly parallelize multiple AD7675 channels behind a single digital controller, leveraging the 100 kSPS per-channel rate to sustain aggregate system throughput. The 48-LFCSP-VQ 7x7 mm footprint allows high channel density on standard 4-layer PCBs.
Được đề xuất
Power-Line Monitoring & Industrial Sensors
The AD7675ACPZRL's 100 kSPS rate and ±2.5 V true bipolar differential input match the dynamic range of power-line monitoring current shunts and isolated transducer outputs in industrial installations. When used with an isolation amplifier such as the AD202 or ADuM3190, the ADC can digitize high-voltage bus currents safely while preserving 16-bit accuracy. Zero pipeline delay ensures transient fault detection within a single sample cycle, critical for protective relaying and power-quality analyzers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7675ACPZRL — 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 | AD7675ACPZ | AD7675BCPZRL | AD7674ACPZRL | AD7650ACPZRL | ADS8481IRGZR |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Package | 48-LFCSP-VQ (7x7 mm) | 48-LFCSP-VQ (7x7 mm) - same | 48-LFCSP-VQ (7x7 mm) - same | 48-LFCSP-VQ (7x7 mm) - same | 48-LFCSP-VQ (7x7 mm) - same | 48-QFN (7x7 mm) - same footprint |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits | 18 bits |
| Sample Rate | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS | 500+ kSPS | 1 MSPS |
| Power Dissipation | 15 mW typ | 15 mW typ | 15 mW typ | Similar | Higher (500 kSPS) | Higher (1 MSPS) |
Bảo phân biệt quan trọng
- True bipolar ±2.5 V differential input on a single 5 V supply (vsADS8481IRGZR)
- Zero pipeline delay for deterministic sampling (vsAD7650ACPZRL)
- Both parallel and serial interfaces on a single pinout (vsAD7674ACPZRL)
Ghi chú thiết kế
The AD7675ACPZRL requires a clean analog 5 V (AVDD) supply and a separately filtered digital 5 V or 3 V (DVDD) supply. Place a 10 uF tantalum plus a 0.1 uF ceramic decoupling capacitor within 5 mm of the AVDD pin and an identical pair on DVDD. Reference the datasheet recommended layout to keep the digital return currents from coupling back into the analog ground plane; the exposed pad must be soldered to a clean AGND pour to minimize ground bounce and thermal resistance.
Source impedance on the IN+ and IN- pins must remain below approximately 50 ohm at the rated sample speed to avoid degrading THD. If the upstream op-amp or driver has higher output impedance, insert a wide-bandwidth buffer such as the AD8275 immediately before the ADC inputs. Also, the CAPA/CAPB reference-buffer capacitors must be installed exactly as shown in the datasheet typical connection diagram - omitting or substituting them will result in large INL and gain errors.
Route the parallel data bus (DB0-DB15) as short, length-matched traces to minimize skew; if only the high byte (DB8-DB15) is read in 8-bit parallel mode, the layout can be simplified but the unused low-byte traces should still be routed or terminated to avoid reflections. Keep the analog input traces (IN+, IN-) as a true differential pair with continuous ground reference on both sides, and keep them physically separated from the digital bus to preserve 94 dB SINAD.
Estimated: at 15 mW dissipation and the 48-LFCSP-VQ 7x7 mm package typical theta_JA of approximately 28 C/W on a standard 4-layer JEDEC test board, the junction temperature rise above ambient is about 0.4 C - well within the rated operating range. Nevertheless, always solder the exposed pad to a continuous AGND copper pour of at least 1 square inch to stay within the datasheet thermal envelope and to keep the analog ground reference stable.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page and distributor listings. Not AEC-Q100 qualified - this part targets industrial/medical instrumentation, not automotive. Halogen-free status not explicitly stated in the verified web data; see ADI environmental compliance page for the latest statement.
