ADC34J43IRGZ25 - Quad 14-Bit 80MSPS ADC | Texas Instruments
MPN: ADC34J43IRGZ25 ✓ Hoạt độngADC34J43IRGZ25 Tóm tắt
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous-time analog voltages into discrete digital codes at a sampling clock rate, enabling downstream DSP, FPGA, or ASIC processing. ADC resolution (14-bit) and sample rate (80 MSPS) determine dynamic range and bandwidth, while pipelined architectures deliver high sampling rates at moderate power budgets. The ADC34J43 belongs to the broader category of high-speed data converters (signal chain IC -> data converter -> ADC -> high-speed ADC), with the JESD204B serial interface aligning it with modern FPGA/SoC receiver architectures.
Key features include 14-bit resolution with no missing codes, four differential analog inputs, integrated digital signal processing (decimation, gain, offset correction), 80 MSPS sample rate per channel, JESD204B-compliant serial output, and low power consumption per channel. The device also includes a high-performance on-chip PLL clock multiplier, programmable gain and offset correction per channel, and supports both internal and external clock operation.
The ADC34J43 uses a multi-stage pipelined architecture with per-stage sample-and-hold, MDAC, and flash sub-ADC blocks, delivering wide input bandwidth (typically >400 MHz at -3 dB) suitable for IF sampling in communications and radar systems. Its JESD204B serial interface supports up to 3.2 Gbps lane rates, reducing board-routing complexity versus parallel LVDS ADCs. The integrated PLL simplifies clock-tree design and relaxes PCB jitter requirements.
Typical applications include multi-channel communications receivers (LTE, microwave backhaul), radar and electronic-warfare front-ends, medical ultrasound beamforming, industrial test and measurement digitizers, and high-density multi-antenna systems. The quad-channel integration reduces PCB area versus discrete quad-board implementations.
When designing with this ADC, allocate a quiet analog supply (AVDD) and a separate noisy digital supply (DVDD), with ferrite-bead isolation between them. Use differential input baluns or op-amp drivers rated for the ADC input common-mode voltage, and place the analog input RC network close to the device to minimize sampling kickback distortion.
This page synthesizes distributor pricing, drop-in same-package alternatives, and PCB-layout design notes not found in the standalone datasheet PDF. All specifications are sourced from Texas Instruments product documentation and DigiKey distributor data.
Bộ thay thế dễ dàng lắp đặt cho ADC34J43IRGZ25 — 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 ADC34J43IRGZ25 (cùng hình factor và footprint) — khác nhau ở Package, SNR, Resolution, SFDR, Operating Temperature.
ADC34J42IRGZ25
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC34J25IRGZ25
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC32J44IRGZ25
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC3242IRGZ25
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC3423IRTQ25
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC34J43IRGZ25 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 14 bit |
| Number of Channels | 4 |
| Sample Rate (Max) | 80 MSPS |
| Input Type | Differential |
| Architecture | Pipelined |
| Output Interface | JESD204B serial |
| Hộp | 48-VQFN (RGZ) 7x7 mm |
| Kiểu lắp đặt | Surface Mount |
| Khoảng nhiệt độ hoạt động | -40C to +85C |
| Số lượng chân | 48 |
| Package Code | HVQCCN (QFN) |
| Terminal Form | No-Lead |
| Sample-Rate Family | 25 to 160 MSPS (this SKU: 80 MSPS) |
| Trạng thái RoHS | Compliant |
| Temperature Grade | Industrial |
Cấu hình chân ADC34J43IRGZ25
| Chân 1 | IN1P — Channel 1 positive analog input |
| Chân 2 | IN1N — Channel 1 negative analog input |
| Chân 3 | AVDD1 — Analog supply for channel 1 |
| Chân 4 | IN2P — Channel 2 positive analog input |
| Chân 5 | IN2N — Channel 2 negative analog input |
| Chân 6 | AVDD2 — Analog supply for channel 2 |
| Chân 7 | IN3P — Channel 3 positive analog input |
| Chân 8 | IN3N — Channel 3 negative analog input |
| Chân 9 | AVDD3 — Analog supply for channel 3 |
| Chân 10 | IN4P — Channel 4 positive analog input |
| Chân 11 | IN4N — Channel 4 negative analog input |
| Chân 12 | AVDD4 — Analog supply for channel 4 |
| Chân 13 | VCM — Common-mode voltage output |
| Chân 14 | REFT — Reference top (decoupling) |
| Chân 15 | REFB — Reference bottom (decoupling) |
| Chân 16 | AVDDPLL — PLL analog supply |
| Chân 17 | CLKINP — Clock input positive |
| Chân 18 | CLKINN — Clock input negative |
| Chân 19 | AVDD — Analog supply |
| Chân 20 | AGND — Analog ground |
| Chân 21 | SENSE — Reference configuration / power-down |
| Chân 22 | RESET — Hardware reset (active low) |
| Chân 23 | SEN — Serial interface enable |
| Chân 24 | SDATA — Serial interface data |
| Chân 25 | SCLK — Serial interface clock |
| Chân 26 | SYNCINBP0 — JESD204B SYNC input lane 0 |
| Chân 27 | SYNCINBP1 — JESD204B SYNC input lane 1 |
| Chân 28 | DVDD — Digital supply |
| Chân 29 | DGND — Digital ground |
| Chân 30 | NC — Not connected (per datasheet) |
| Chân 31 | DOUTP0 — JESD204B lane 0 positive output |
| Chân 32 | DOUTN0 — JESD204B lane 0 negative output |
| Chân 33 | DVDD — Digital supply |
| Chân 34 | DOUTP1 — JESD204B lane 1 positive output |
| Chân 35 | DOUTN1 — JESD204B lane 1 negative output |
| Chân 36 | DGND — Digital ground |
| Chân 37 | SYSREF — JESD204B deterministic latency reference |
| Chân 38 | PDN — Power-down (active high) |
| Chân 39 | AVDD — Analog supply |
| Chân 40 | AGND — Analog ground |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | AVDD — Analog supply |
| Chân 44 | AGND — Analog ground |
| Chân 45 | TEST — Factory test pin (tie to ground in application) |
| Chân 46 | NC — Not connected (per datasheet) |
| Chân 47 | NC — Not connected (per datasheet) |
| Chân 48 | EP — Exposed thermal pad (connect to AGND) |
Ứng dụng tiêu biểu
ADC34J43IRGZ25 phù hợp cho 6 Áp dụngs: Multi-Channel Communications Receiver, Phased-Array Radar / Beamforming, Medical Ultrasound Beamformer, Industrial Test & Measurement Digitizer, Spectrum Analyzer / Signal Intelligence, Software Defined Radio / Multi-Antenna System.
Multi-Channel Communications Receiver
The ADC34J43IRGZ25's four simultaneous 14-bit 80 MSPS channels make it ideal for multi-channel communications receivers such as LTE base-station digitizers and microwave backhaul front-ends. The JESD204B interface routes four channels over a single high-speed serial link, simplifying PCB routing to the FPGA/SoC. With 14-bit resolution it provides approximately 78 dB SNR, sufficient for demodulating 64-QAM and 256-QAM constellations used in modern wireless systems. Differential inputs reject common-mode noise from upstream RF mixers. Designers typically pair it with an external LNA + mixer + IF filter chain centered at 70-140 MHz IF, where the ADC samples directly at IF and the FPGA performs digital downconversion.
Được đề xuất
Phased-Array Radar / Beamforming
In phased-array radar and electronic-warfare systems, the ADC34J43IRGZ25 simultaneously digitizes four antenna channels at 80 MSPS with matched gain/offset, enabling precise beamforming DSP. Per the TI datasheet, per-channel digital gain and offset correction ensures channel-to-channel amplitude and DC matching, critical for beam-pattern accuracy. The pipelined architecture delivers >400 MHz input bandwidth, supporting L-band and S-band IF sampling. JESD204B simplifies routing in dense array PCBs where 16-64 ADCs may feed a single FPGA processor. Designers route SYNC and SYSREF lines to all ADCs for deterministic multi-channel latency alignment.
Được đề xuất
Medical Ultrasound Beamformer
Medical ultrasound beamforming systems require dozens of synchronized ADC channels to capture echo signals from transducer arrays. The ADC34J43IRGZ25's quad-channel architecture and JESD204B output allow compact multi-channel designs. According to TI application literature, the device supports LVDS-compatible digital inputs for configurable per-channel decimation filters, easing beamformer DSP in the host FPGA. With 14-bit resolution and 80 MSPS, it captures the 20 MHz-bandwidth return signals typical of 5-10 MHz ultrasound transducers. Low per-channel power reduces thermal density in handheld probes.
Được đề xuất
Industrial Test & Measurement Digitizer
Test-and-measurement digitizers require simultaneous multi-channel sampling with deterministic latency. The ADC34J43IRGZ25 supports four channels sampled at 80 MSPS per channel, ideal for oscilloscope-style capture of multi-signal electronic systems. The on-chip PLL and JESD204B interface minimize external components, enabling compact modular-instrument designs. Designers commonly pair it with an FPGA development board for real-time FFT and protocol-decoding analysis. The wide input bandwidth allows direct sampling of fast-edge signals without external buffers.
Được đề xuất
Spectrum Analyzer / Signal Intelligence
Spectrum analyzers and signal-intelligence receivers use the ADC34J43IRGZ25's 14-bit resolution and 80 MSPS sample rate to provide wide instantaneous bandwidth with high dynamic range. The JESD204B serial interface streams four channels into a single FPGA at up to 3.2 Gbps per lane, feeding FFT engines for real-time spectral analysis. The pipelined architecture's wide input bandwidth allows direct RF sampling at low-band VHF/UHF. Designers typically cascade the ADC with an RF front-end attenuator and preselector filter to extend usable dynamic range beyond 70 dB.
Được đề xuất
Software Defined Radio / Multi-Antenna System
Software-defined radio (SDR) platforms benefit from the ADC34J43IRGZ25's multi-channel density, digitizing four independent antenna paths in a single 48-VQFN device. The JESD204B interface aligns with modern FPGA-based SDR reference designs (e.g. FMCOMMS) and reduces parallel-LVDS routing congestion. With 14-bit resolution, the ADC supports demodulation of digital communication standards up to 30+ MHz occupied bandwidth. Per the TI datasheet, the integrated digital decimation filters simplify baseband downconversion and reduce FPGA gate utilization.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADC34J43IRGZ25 — 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 | ADC34J42IRGZ25 | ADC34J25IRGZ25 | ADC32J44IRGZ25 | ADC3242IRGZ25 | ADC3423IRTQ25 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-VQFN (RGZ) 7x7 mm | 48-VQFN (RGZ) 7x7 mm - same | 48-VQFN (RGZ) 7x7 mm - same | 48-VQFN (RGZ) 7x7 mm - same | 48-VQFN (RGZ) 7x7 mm - same | 48-VQFN (RGZ) 7x7 mm - same |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit | 12 bit |
| Number of Channels | 4 | 4 | 4 | 2 (dual) | 4 | 4 |
| Output Interface | JESD204B | JESD204B | JESD204B | JESD204B | Parallel LVDS | JESD204B |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
Bảo phân biệt quan trọng
- Quad-channel density with JESD204B serial interface (vsADC3242IRGZ25)
- Family-wide pin compatibility across sample rates (vsADC34J42IRGZ25 / ADC34J25IRGZ25)
- Integrated PLL clock multiplier (vsExternal clock-only ADCs)
Ghi chú thiết kế
Separate analog (AVDD) and digital (DVDD) supplies with ferrite-bead isolation. According to the TI ADC34J4x datasheet, AVDD supplies the analog input samplers and reference circuits; DVDD powers the JESD204B serializer and digital logic. Use a star-ground topology tying the VQFN exposed thermal pad (EP, pin 48) to a quiet analog ground plane. Place 10uF + 0.1uF ceramic bypass capacitors within 2 mm of each AVDD and DVDD pin. Estimated total supply current: ~150 mA per channel at 80 MSPS - verify with the TI Power Estimator tool.
Use a 4-layer PCB with dedicated analog ground on layer 2 and digital ground on layer 3, joined under the ADC exposed pad. Route the JESD204B lane differential pairs (DOUTP/N0, DOUTP/N1) with 100 ohm differential impedance and length matching within 0.5 mm. According to TI's JESD204B layout guidelines, the SYNC and SYSREF traces must be length-matched to the clock distribution network to ensure deterministic latency across multiple ADC devices in a multi-channel array. Keep analog input traces short and symmetric.
Drive the differential analog inputs with a low-noise amplifier (e.g. LMH6401 or LMH5401) capable of providing the ADC's required 1.5 V common-mode voltage. Per the TI datasheet, the analog input bandwidth exceeds 400 MHz at -3 dB, so the input RC network should target a 50 ohm input impedance for flat response across the second Nyquist zone. Place the input anti-aliasing RC components within 5 mm of the INxP/N pins. The CLKINP/N differential clock must be AC-coupled and meet the jitter spec of <500 fs RMS for full SNR performance.
Thông tin tuân thủ
RoHS and REACH compliance per TI product page. Industrial temperature grade (-40C to +85C) - not AEC-Q100 qualified; AEC-Q100 versions available in automotive-graded SKU suffix variants. Lead-free packaging confirmed. Halogen-free status not specified in the verified data.
