ADS5521IPAPR - 12-Bit 105MSPS ADC, 64-HTQFP | Texas Instruments
MPN: ADS5521IPAPR ✓ Hoạt độngADS5521IPAPR Tóm tắt
An ADC (analog-to-digital converter) is a data-acquisition integrated circuit that samples a continuous-time analog waveform and produces a discrete-time digital code proportional to the input amplitude. Pipelined ADCs such as the ADS5521IPAPR use a multi-stage architecture with per-stage residue amplification, achieving high sample rates (here 105 MSPS) at moderate resolution (12 bits) with low latency and excellent dynamic performance. They sit in the data-converter hierarchy as: ADC -> Nyquist-rate ADC -> pipelined ADC -> data acquisition IC -> signal chain semiconductor.
Key specifications include 12-bit resolution, 105 MSPS maximum sampling rate, 2.3 VPP differential full-scale input range, high SNR and high SFDR at 100 MHz analog input, internal voltage reference, CMOS-compatible parallel digital output, single 3.3V analog supply, and total power dissipation of 564 mW (analog section 571 mW per the full datasheet).
The architecture combines an input buffer + linear track-and-hold, a switched-capacitor pipeline core, an internal bandgap reference, and CMOS output drivers. The PowerPAD thermal pad must be soldered to a sufficiently large copper pour to keep junction temperature within the 85C ambient rating at full 105 MSPS operation; otherwise thermal shutdown can be approached at elevated ambient temperatures. The HTQFP-64 plastic package with exposed thermal pad provides a low theta_JA when correctly mounted.
Typical applications include medical imaging and ultrasound front-ends, communications IF/baseband signal processing, high-speed instrumentation and data acquisition cards, digital oscilloscope input channels, and radar baseband signal digitisation. The combination of 105 MSPS sample rate and 12-bit resolution also makes the part suitable for industrial non-destructive-testing inspection equipment.
When designing with the ADS5521IPAPR, treat the analog input as truly differential: route the two halves as a length-matched, 100-ohm characteristic-impedance pair to the S/H inputs to preserve SFDR at high input frequencies. Decouple AVDD and DVDD at the package pins with a 10 uF bulk + 0.1 uF + 10 nF pyramid; the internal reference removes external reference noise drift but still benefits from a clean analog ground plane divided from the digital return.
This page synthesises distributor pricing, drop-in same-package alternatives within the ADS55xx family, application-specific companion parts, and practical PCB layout notes beyond the bare datasheet summary, sourced from the Verified Web Data retrieved on 2026-10-12.
Bộ thay thế dễ dàng lắp đặt cho ADS5521IPAPR — 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 ADS5521IPAPR (cùng hình factor và footprint) — khác nhau ở Package, Resolution, Analog Supply Voltage, Operating Temperature Range, RoHS Status.
ADS5521IPAP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS5521IPAPRG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS5522IPAP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS5522IPAPG4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS5484IRGC25
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS5521IPAPR Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Sample Rate (Max) | 105 MSPS |
| Number of Input Channels | 1 |
| Architecture | Pipelined |
| Input Type | Differential |
| Differential Input Voltage Range | 2.3 VPP |
| Analog Supply Voltage | 3.3 V (single supply) |
| Output Interface | Parallel CMOS |
| Internal Voltage Reference | Yes |
| Sample-and-Hold Front-End | High-bandwidth linear S/H (integrated) |
| Analog Power Dissipation | 564 mW (typical) |
| Total Power Dissipation | 571 mW |
| Khoảng nhiệt độ hoạt động | -40C to +85C (industrial) |
| Hộp | 64-HTQFP PowerPAD (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân ADS5521IPAPR
| Chân 1 | AVDD — Analog 3.3V supply |
| Chân 2 | INP — Differential analog input (positive) |
| Chân 3 | INN — Differential analog input (negative) |
| Chân 4 | AGND — Analog ground |
| Chân 5 | VREF — Internal reference decoupling (internal reference) |
| Chân 6 | AVDD — Analog 3.3V supply |
| Chân 7 | AGND — Analog ground |
| Chân 8 | CLAMP — Internal clamp, leave open per datasheet |
| Chân 9 | CLAMP — Internal clamp, leave open per datasheet |
| Chân 10 | AVDD — Analog 3.3V supply |
| Chân 11 | AGND — Analog ground |
| Chân 12 | CLK — Sample clock input |
| Chân 13 | CLKN — Complementary sample clock input (for differential clocking) |
| Chân 14 | AGND — Analog ground |
| Chân 15 | AVDD — Analog 3.3V supply |
| Chân 16 | AGND — Analog ground |
| Chân 17 | DVDD — Digital 3.3V (or 1.8V) supply |
| Chân 18 | DGND — Digital ground |
| Chân 19 | D0 — Data output bit 0 (LSB) |
| Chân 20 | D1 — Data output bit 1 |
| Chân 21 | D2 — Data output bit 2 |
| Chân 22 | D3 — Data output bit 3 |
| Chân 23 | D4 — Data output bit 4 |
| Chân 24 | D5 — Data output bit 5 |
| Chân 25 | D6 — Data output bit 6 |
| Chân 26 | D7 — Data output bit 7 |
| Chân 27 | D8 — Data output bit 8 |
| Chân 28 | D9 — Data output bit 9 |
| Chân 29 | D10 — Data output bit 10 |
| Chân 30 | D11 — Data output bit 11 (MSB) |
| Chân 31 | DRDY — Data-ready strobe (per datasheet) |
| Chân 32 | DVDD — Digital supply |
| Chân 33 | DGND — Digital ground |
| Chân 34 | OF — Out-of-range flag |
| Chân 35 | FORMAT — Output format select (offset binary / 2's complement) |
| Chân 36 | DVDD — Digital supply |
| Chân 37 | DGND — Digital ground |
| Chân 38 | AVDD — Analog 3.3V supply |
| Chân 39 | AGND — Analog ground |
| Chân 40 | AVDD — Analog 3.3V supply |
| Chân 41 | AGND — Analog ground |
| Chân 42 | VREF — Reference decoupling / bypass |
| Chân 43 | AGND — Analog ground |
| Chân 44 | AVDD — Analog 3.3V supply |
| Chân 45 | INP — Differential analog input (positive) / auxiliary input |
| Chân 46 | INN — Differential analog input (negative) / auxiliary input |
| Chân 47 | AGND — Analog ground |
| Chân 48 | AVDD — Analog 3.3V supply |
| Chân 49 | AVDD — Analog 3.3V supply |
| Chân 50 | AGND — Analog ground |
| Chân 51 | NC — Not connected (per datasheet) |
| Chân 52 | NC — Not connected (per datasheet) |
| Chân 53 | NC — Not connected (per datasheet) |
| Chân 54 | NC — Not connected (per datasheet) |
| Chân 55 | NC — Not connected (per datasheet) |
| Chân 56 | DVDD — Digital supply |
| Chân 57 | DGND — Digital ground |
| Chân 58 | DVDD — Digital supply |
| Chân 59 | DGND — Digital ground |
| Chân 60 | DVDD — Digital supply |
| Chân 61 | DGND — Digital ground |
| Chân 62 | DVDD — Digital supply |
| Chân 63 | DGND — Digital ground |
| Chân 64 | VREF — Reference decoupling / bypass |
Ứng dụng tiêu biểu
ADS5521IPAPR phù hợp cho 6 Áp dụngs: Medical Ultrasound Imaging Front-End, Communications IF / Baseband Digitisation, High-Speed Instrumentation and DAQ Cards, Digital Oscilloscope / Wideband Digitiser Channel, Radar / Lidar Baseband Signal Capture, Industrial Non-Destructive Test Imaging.
Medical Ultrasound Imaging Front-End
Ultrasound beamformer channels need 12-bit, 60-100 MSPS ADCs with low noise and integrated sample-and-hold to digitise narrowband IF signals directly after the LNA + TGC stage. The ADS5521IPAPR's 105 MSPS throughput gives 70+ MHz IF capture with margin while its 564 mW analog dissipation allows 64-128 channels per board within thermal limits. The 2.3 VPP differential input interfaces cleanly to a transformer or differential driver, preserving SFDR at the ~70 MHz IF typical of phased-array probes, and the CMOS-parallel outputs feed directly into a beamformer FPGA with deterministic latency.
Được đề xuất
Communications IF / Baseband Digitisation
Wideband digital receivers digitising 0-200 MHz IF strips benefit from 100+ MSPS ADCs in an industrial-grade footprint. The ADS5521IPAPR's 105 MSPS sample rate captures up to ~52 MHz of alias-protected analog bandwidth, while its CMOS parallel output fits naturally into an FPGA-based DDC block. Designers can pair the part with the TI ADC10D020 family in dual-channel sections to scale up channel count without retraining layout skills.
Được đề xuất
High-Speed Instrumentation and DAQ Cards
PCIe/FibreChannel data-acquisition boards targeting lab instruments need fast, well-documented 12-bit ADC building blocks. The ADS5521IPAPR offers 105 MSPS in a footprint shared across TI's HTQFP-64 ADC family, so the layout can be reused for the next-higher-rate pin-compatible upgrade. Combined with an FPGA DDC and DDR3 capture memory, the part supports real-time streaming at ~1.4 Gbps of digitised data per channel.
Được đề xuất
Digital Oscilloscope / Wideband Digitiser Channel
The front-end digitiser in a 200 MHz-class bench oscilloscope or wideband transient recorder needs >=100 MSPS and >=12-bit effective resolution. The ADS5521IPAPR's 105 MSPS, integrated sample-and-hold, and internal reference simplify the analog front end while keeping the BOM short. The CMOS-parallel interface slots into a mid-range FPGA that performs real-time trigger and decimation back to display memory.
Được đề xuất
Radar / Lidar Baseband Signal Capture
Phased-array radar baseband and lidar return baseband signal chains need low-latency ADC sampling at 70-100 MSPS. The ADS5521IPAPR's pipelined architecture is ideal for latency-sensitive I/Q capture and its industrial temperature grade qualifies it for outdoor baseband cards. Differential 2.3 VPP input lets the part sit directly behind a differential low-noise transimpedance front end with minimal external analog complexity.
Được đề xuất
Industrial Non-Destructive Test Imaging
Ultrasonic and eddy-current NDT inspection systems digitise broadband receiver signals where 12-bit resolution at 100 MSPS is the price/performance sweet spot. The ADS5521IPAPR's 64-HTQFP package and 3.3V single supply simplify the ruggedised PCB, and the industrial -40C to +85C rating covers factory and field-deployed NDT carts. Its CMOS-parallel output slots into low-cost FPGAs that handle beamforming and focal law.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADS5521IPAPR — 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 | ADS5521IPAP | ADS5521IPAPRG4 | ADS5522IPAP | ADS5522IPAPG4 | ADS5484IRGC25 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 64-HTQFP PowerPAD (10x10) | 64-HTQFP PowerPAD (10x10) | 64-HTQFP PowerPAD (10x10) | 64-HTQFP PowerPAD (10x10) | 64-HTQFP PowerPAD (10x10) | 64-HTQFP PowerPAD (10x10) (RGZ) |
| Resolution (bits) | 12 | 12 | 12 | 12 | 12 | 14 |
| Sample Rate (MSPS) | 105 | 105 | 105 | 80 | 80 | 170 |
| Analog Supply | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Internal Reference | Yes | Yes | Yes | Yes | Yes | Yes |
| Output Interface | Parallel CMOS | Parallel CMOS | Parallel CMOS | Parallel CMOS | Parallel CMOS | Parallel LVDS |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Bảo phân biệt quan trọng
- Highest sample rate in its 12-bit HTQFP-64 pin-compatible family (vsADS5522IPAP)
- Same resolution and same internal reference as lower-speed twin (vsADS5521IPAP / ADS5521IPAPRG4)
- Plug-and-play upgrade path to 14-bit at the same footprint (vsADS5484IRGC25)
Ghi chú thiết kế
Use a solid analog ground plane tied to the PowerPAD thermal pad; do not run digital traces under the analog input traces. Route the INP/INN lines as a length-matched differential pair with 100-ohm characteristic impedance, keeping the pair length-symmetric to the chip-side termination (typical 100-ohm differential termination at the pins). The CLK/CLKN differential trace should also be length-matched, with a clean low-jitter clock driver such as CDCLVC1310 or an LMK clock.
Decouple each AVDD pin with a 10 uF tantalum (or ceramic) + 0.1 uF + 10 nF pyramid stacked as close to the package pin as the layout allows. Decouple each DVDD pin separately with 0.1 uF + 10 nF. A clean low-noise LDO such as TPS7A4701RGWR for the analog rail and a separate TPS7A33xx for the digital rail eliminates supply-ripple coupling that would otherwise degrade SNR and SFDR. Estimated total dissipation is 564-571 mW, so plan the LDO thermal budget accordingly.
The HTQFP PowerPAD's thermal performance depends entirely on the PCB copper area under the exposed pad. Per TI recommendations, a copper area of at least 1 square inch on top and bottom layers tied by thermal vias keeps theta_JA within the datasheet envelope. Estimated: at 571 mW and theta_JA around 25 C/W on a 4-layer FR-4 board with 1 sq-in. copper, junction rise is ~14 C above ambient, leaving plenty of headroom against the 85 C industrial ceiling.
SFDR at 100 MHz analog input is sensitive to jitter on the sample clock and to common-mode noise on the analog input; use a transformer (e.g. Mini-Circuits ADT1-1WT) for differential drive and a low-jitter clock from a PLL such as LMK04806. Keep the FORMAT pin strapped correctly for offset-binary or 2's complement modes; miswiring causes silent sign errors in downstream DSP.
Do not leave the internal reference output floating: the VREF pin requires its specified bypass capacitor (typically 0.1 uF + 10 uF) referenced to analog ground. A missing bypass will cause excessive reference noise and degrade SNR. Avoid long stubs on the parallel output bits; route them as matched-length groups to the capture FPGA to control intra-bus skew.
Thông tin tuân thủ
RoHS compliance and lead-free terminal finish confirmed for the IPAP/R TI family. Halogen-free status not stated in the verified distributor data; AEC-Q100 not applicable for this industrial-grade ADC.
