PADC34J44IRGZT - 14-Bit 125 MSPS Quad-Channel ADC | Texas Instruments
MPN: PADC34J44IRGZT ✓ Hoạt độngPADC34J44IRGZT Tóm tắt
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples continuous analog voltage levels and quantises them into discrete binary codes for downstream digital signal processing. Within the broader signal-chain taxonomy, the PADC34J44 sits at the ADC layer, under high-speed converters and then data converters, which themselves form a sub-category of data acquisition (DAQ) and mixed-signal ICs. Pipelined ADCs use a multi-stage switched-capacitor architecture that balances resolution, speed, and power efficiency, making them the dominant choice for sample rates from 10 MSPS to 500 MSPS where successive-approximation-register (SAR) ADCs become impractical.
Key differentiating specifications include four truly simultaneous-sampling 14-bit channels at up to 125 MSPS, a JESD204B subclass 0/1 deterministic serial interface (up to 4 lanes, lane rates up to 3.5 Gbps), LVDS-compatible data formats, and on-chip input termination with a 50 MHz analog input bandwidth. The integrated analog front-end typically provides up to 2 Vpp differential full-scale input range, programmable gain, and dither for harmonic-distortion improvement. Power consumption is in the low hundreds of mW per channel at full sample rate, with flexible power-down modes for portable or duty-cycled applications.
Typical applications include multi-channel communications receivers (cellular base-station digitiser cards, software-defined radio platforms), medical imaging front-ends (portable ultrasound beamformers, multi-channel MRI receivers), industrial multi-axis vibration analysis, and defense electronic-warfare subsystems. The combination of quad channels, 125 MSPS, and JESD204B output allows designers to consolidate four converter channels plus their LVDS routing into a single 7x7 mm IC, reducing board area and simplifying FPGA capture logic compared to parallel-output ADCs.
When laying out the PCB, route the analog inputs as 50-ohm differential pairs with length matching, keep the 1.8 V AVCC plane well-decoupled, and provide a solid ground pour beneath the exposed pad for thermal and signal-integrity reasons; the JESD204B serial lines should be routed as 100-ohm differential pairs to the FPGA, with AC-coupling capacitors placed close to the transmitter pins per the JESD204B specification.
Bộ thay thế dễ dàng lắp đặt cho PADC34J44IRGZT — 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 PADC34J44IRGZT (cùng hình factor và footprint) — khác nhau ở Package, Input Type, Operating Temperature Range.
PADC3444IRTQT
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Xem tài liệu →ADC34J44IRTQT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PADC34J44IRGZT Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 14 bit |
| Number of Input Channels | 4 (simultaneous sampling) |
| Sample Rate (max) | 125 MSPS per channel |
| Architecture | Pipelined |
| Analog Input Configuration | Differential |
| Digital Interface | JESD204B (subclass 0/1), up to 4 lanes |
| Analog Supply Voltage | 1.8 V |
| Output Logic Level | CML (JESD204B serial) |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C |
| Hộp | 48-pin VQFN (RGZ) 7x7 mm with exposed thermal pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead Free | Yes |
| Pins | 48 |
Cấu hình chân PADC34J44IRGZT
| Chân 1 | AINP — Analog input positive pin (channel) |
| Chân 2 | AINN — Analog input negative pin (channel) |
| Chân 3 | AVDD — Analog supply (1.8 V typical) |
| Chân 4 | AVSS — Analog ground |
| Chân 5 | CLKP — Differential sample clock positive |
| Chân 6 | CLKN — Differential sample clock negative |
| Chân 7 | SYSREFP — JESD204B SYSREF positive |
| Chân 8 | SYSREFN — JESD204B SYSREF negative |
| Chân 9 | DVDD — Digital supply [DATA_NEEDED: nominal voltage] |
| Chân 10 | DVSS — Digital ground |
| Chân 11 | RESETn — Active-low hardware reset |
| Chân 12 | PDN — Active-low power-down input |
| Chân 13 | SCLK — SPI serial clock |
| Chân 14 | SDI — SPI serial data input |
| Chân 15 | SDO — SPI serial data output |
| Chân 16 | SEN — SPI chip enable (active low) |
| Chân 17 | GPIO — General-purpose I/O |
| Chân 18 | TDRIVE — Output driver strength control [DATA_NEEDED: fully verified function] |
| Chân 19 | DA[0] — JESD204B serializer lane control / address bit [DATA_NEEDED: fully verified function] |
| Chân 20 | DA[1] — JESD204B serializer lane control / address bit [DATA_NEEDED: fully verified function] |
| Chân 21 | AVDD — Analog supply (1.8 V typical) |
| Chân 22 | AINP — Analog input positive pin (channel) |
| Chân 23 | AINN — Analog input negative pin (channel) |
| Chân 24 | AVSS — Analog ground |
| Chân 25 | AVDD — Analog supply (1.8 V typical) |
| Chân 26 | AINP — Analog input positive pin (channel) |
| Chân 27 | AINN — Analog input negative pin (channel) |
| Chân 28 | AVSS — Analog ground |
| Chân 29 | JESD0_P — JESD204B serial lane 0 positive output |
| Chân 30 | JESD0_N — JESD204B serial lane 0 negative output |
| Chân 31 | JESD1_P — JESD204B serial lane 1 positive output [DATA_NEEDED: verify] |
| Chân 32 | JESD1_N — JESD204B serial lane 1 negative output [DATA_NEEDED: verify] |
| Chân 33 | JESD2_P — JESD204B serial lane 2 positive output [DATA_NEEDED: verify] |
| Chân 34 | JESD2_N — JESD204B serial lane 2 negative output [DATA_NEEDED: verify] |
| Chân 35 | JESD3_P — JESD204B serial lane 3 positive output [DATA_NEEDED: verify] |
| Chân 36 | JESD3_N — JESD204B serial lane 3 negative output [DATA_NEEDED: verify] |
| Chân 37 | AVDD — Analog supply (1.8 V typical) |
| Chân 38 | AVSS — Analog ground |
| Chân 39 | AINP — Analog input positive pin (channel) |
| Chân 40 | AINN — Analog input negative pin (channel) |
| Chân 41 | AVSS — Analog ground |
| Chân 42 | AVDD — Analog supply (1.8 V typical) |
| Chân 43 | VCM — Common-mode voltage output |
| Chân 44 | REFT — Decoupling reference top [DATA_NEEDED: fully verified function] |
| Chân 45 | REFB — Decoupling reference bottom [DATA_NEEDED: fully verified function] |
| Chân 46 | AVDD — Analog supply (1.8 V typical) |
| Chân 47 | AVSS — Analog ground |
| Chân 48 | EP — Exposed thermal pad (must solder to ground) |
Ứng dụng tiêu biểu
PADC34J44IRGZT phù hợp cho 6 Áp dụngs: Multi-Channel Communications Receiver, Portable Ultrasound Beamformer Front-End, Test and Measurement / Oscilloscope Front-End, Industrial Multi-Axis Vibration / Sonar Analysis, Defense Electronic Warfare / Wideband Recorder, Software-Defined Radio (SDR) Platform.
Multi-Channel Communications Receiver
The PADC34J44IRGZT fits multi-channel communications receivers because its four simultaneous-sampling 14-bit / 125 MSPS channels deliver the throughput needed to digitise 4G/5G base-station observation receivers and software-defined-radio front-ends in a single IC. The JESD204B serial interface, with up to four lanes and deterministic latency via SYSREF, eliminates the wide parallel LVDS routing that otherwise crowds multi-channel FPGA designs. Placing the ADC between the balun/differential driver and the FPGA capture block at typical IF frequencies up to 50 MHz gives each channel a 73 dB SNR-class dynamic range typical of 14-bit high-speed converters, while the 1.8 V analog supply keeps total board power well under 1 W per channel.
Được đề xuất
Portable Ultrasound Beamformer Front-End
The PADC34J44IRGZT suits portable ultrasound beamformers because four simultaneous-sampling channels at 125 MSPS match the per-channel sample rate needed for 50 MHz transducer bandwidth, while the JESD204B interface keeps the board below the 7 x 7 mm ADC footprint - critical for handheld cart-based ultrasound systems. The -40 C to +85 C operating range covers hospital and field-deployed devices, and the low-latency digital interface lets the FPGA apply beamforming delays without additional buffering. Compared with parallel-LVDS ADCs, the JESD204B serial output shrinks the FPGA pin count from about 60 per channel to a few lanes, simplifying BGA fanout and improving EMI in the noise-sensitive front-end.
Được đề xuất
Test and Measurement / Oscilloscope Front-End
The PADC34J44IRGZT is a strong fit for mid-bandwidth digital oscilloscope and modular digitiser front-ends. Four channels at 14 bits and 125 MSPS provide ~72 dBc SFDR-class spurious performance typical of TI pipelined ADCs, which is sufficient for general-purpose lab scopes and modular DAQ systems digitising signals from DC to about 50 MHz. The JESD204B serial interface lets the FPGA capture all four channels on a single serial link, leaving room for additional analog channels and acquisition memory on the same chassis. Solid -40 C to +85 C operation and a 48-VQFN form factor let designers drop the ADC into compact PXIe, USB, or LXI modular instruments without exotic cooling.
Được đề xuất
Industrial Multi-Axis Vibration / Sonar Analysis
In multi-axis vibration analysis and sonar acquisition systems the PADC34J44IRGZT brings four phase-synchronised channels onto one ADC, so phase differences between accelerometers or hydrophones are preserved without sample-skew artefacts. Sampling at 125 MSPS lets an FFT capture vibration harmonics beyond 50 kHz, while 14-bit dynamic range easily resolves sub-1g acceleration changes when scaled with an external charge amplifier. The exposed thermal pad and the industrial -40 C to +85 C range accommodate factory-floor enclosures and outdoor condition-monitoring cabinets, and the JESD204B interface keeps the backplane simple when arrays of 8 / 16 / 32 channels are tiled across modules on a single FPGA.
Được đề xuất
Defense Electronic Warfare / Wideband Recorder
The PADC34J44IRGZT serves in defense electronic-warfare subsystems and wideband DRFM / wideband recorders where four channels of 125 MSPS capture is needed across the IF chain. Its JESD204B serial lanes deliver deterministic data framing, which is essential for synchronising the ADC to a tunable LO and to other converter channels across the receiver. With four simultaneous channels in one 48-VQFN, designers can build dense receiver tiles without the layout congestion of parallel LVDS; the device's industrial temperature rating and its small footprint are also attractive for SWaP-constrained EW pods and unmanned-platform payloads.
Được đề xuất
Software-Defined Radio (SDR) Platform
The PADC34J44IRGZT fits SDR platforms because four 14-bit / 125 MSPS channels with JESD204B output match the typical SDR requirement to digitise one or two antenna pairs (I/Q) at intermediate frequency. Its deterministic serial interface simplifies synchronisation with programmable LO sources, while the integrated analog front-end reduces external components so the analog chain fits alongside an FPGA + DAC on a single board. Developers can pair the ADC with an open-source JESD204B FPGA IP core and capture up to 60 MHz of bandwidth per channel, enabling amateur-radio SDR transceivers, low-cost spectrum monitors, and university SDR teaching platforms in a compact 7 x 7 mm footprint.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PADC34J44IRGZT — 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 | PADC3444IRTQT | ADC34J44IRTQT |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-VQFN (RGZ) 7x7 mm | 48-VQFN (RTQ) - same footprint | 48-VQFN (RTQ) - same footprint |
| Resolution | 14 bit | 14 bit | 14 bit |
| Sample Rate (max) | 125 MSPS / channel | 125 MSPS / channel | 125 MSPS / channel |
| Number of Channels | 4 simultaneous | 4 simultaneous | 4 simultaneous |
| Architecture | Pipelined | Pipelined | Pipelined |
| Digital Interface | JESD204B (up to 4 lanes) | JESD204B (up to 4 lanes) | JESD204B (up to 4 lanes) |
| Analog Supply | 1.8 V | 1.8 V | 1.8 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Bảo phân biệt quan trọng
- Quad simultaneous-sampling channels in a single 48-VQFN (vsParallel-output 14-bit / 125 MSPS ADCs)
- JESD204B serial interface with up to four lanes (vsCMOS-parallel ADCs and LVDS multi-lane ADCs)
- Industrial -40 C to +85 C operating range (vsCommercial-only 0 C to +70 C alternatives)
Ghi chú thiết kế
Route the four analog inputs as length-matched 50-ohm differential pairs on the top signal layer, with no routing on inner layers, and keep total input routing as short as possible. The PADC34J44IRGZT integrates its analog front-end, so an external low-noise differential driver is recommended between the transducer/balun and the ADC inputs; place this driver within 5 mm of the ADC input pins to minimise trace capacitance and to preserve SFDR/SNR.
Solder the exposed thermal pad to a continuous ground copper pour that covers at least 500 mm squared of top-layer copper, with an array of thermal vias to inner ground planes. Although the PADC34J44IRGZT dissipates only a few hundred mW per channel at 125 MSPS, a robust ground/thermal structure is essential for ADC thermal stability; incomplete thermal connection or a fragmented ground pour increases die temperature variation, which can shift the internal reference and degrade linearity.
Do not route the 100-ohm JESD204B serial lanes underneath clock or analog-input traces, and place AC-coupling capacitors within 5 mm of the CML transmitter pins per JESD204B layout guidelines. Forgetting SYSREF capture settings or running the lane rate above the FPGA GTH/GTX capability are common configuration errors; before rotation to production firmware, validate that the link establishes cleanly under worst-case PVT conditions using the TI EVM GUI. Ensure sample-clock jitter is below ~200 fs RMS for the ADC to deliver datasheet SNR at 125 MSPS.
Thông tin tuân thủ
Per TI product page and distributor listings as of 2026-10-15, the PADC34J44IRGZT is RoHS compliant, lead-free, and REACH compliant. AEC-Q100 automotive qualification status is not_applicable for this industrial-grade part; halogen-free status was not confirmed by the verified web data and is recorded as 'unknown'.
