PADC34J45IRGZT - 14-Bit 160MSPS Quad ADC | Texas Instruments
料号： PADC34J45IRGZT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $78.5 | $78.50 |
| 10 | $72.4 | $724.00 |
| 100 | $64.9 | $6,490.00 |
| 500 | $57.2 | $28,600.00 |
| 1,000 | $51.8 | $51,800.00 |
PADC34J45IRGZT 概述
A pipelined ADC is a high-speed converter architecture that breaks the conversion process into multiple low-resolution flash stages separated by sample-and-hold (S/H) amplifiers and DAC residue generators. Pipelined architectures achieve sample rates in the hundreds of MSPS while maintaining 12- to 16-bit resolution; they sit hierarchically below flash ADCs (fastest, lowest resolution) and above successive-approximation-register (SAR) ADCs (slower, highest resolution) on the speed-vs-resolution trade-off curve. The pipelined ADC category belongs to the larger data-converter IC family within signal-chain semiconductors, which also includes DACs, comparators, and integrated analog front ends.
Key features of the PADC34J45IRGZT include a 14-bit resolution, 160 MSPS maximum sample rate, differential analog inputs with on-chip input termination, a JESD204B serial lane output (up to 4 lanes) with deterministic latency, an internal low-jitter clock multiplier, and an exposed thermal pad for low-thermal-resistance PCB mounting. The pipelined core is corrected by an internal calibration engine that trims residue-gain errors at power-up, allowing the part to hold its integral nonlinearity and spurious-free dynamic range over the full -40C to +85C industrial temperature range.
Typical applications of the PADC34J45IRGZT include multi-channel communications receivers, wideband oscilloscopes and digitizers, medical imaging front ends, software-defined radio (SDR) platforms, phased-array radar digitizers, and industrial test and measurement instrumentation. The JESD204B output simplifies board routing by replacing wide parallel LVDS buses with one or more serialized CML lanes, easing layout in dense multi-channel systems.
When designing with this device, pay close attention to PCB layout: the exposed thermal pad must be soldered to a continuous ground plane to keep the junction below 125C. The analog input network typically uses an RF transformer or a fully differential amplifier with back-to-back clamping diodes, and the JESD204B lanes require 100-ohm differential controlled-impedance routing with length matching within the lane de-skew budget.
直接替换替代料： PADC34J45IRGZT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PADC34J45IRGZT （相同外形与封装尺寸） ——差异在于 Operating Temperature Range, Package, Resolution, Input Type, Number of Channels.
快速对比工具——选择替代料号进行并排对比：
PADC34J44IRGZT
✅ 直接替换✓ 有现货
$58.95 / 个
查看数据手册 →ADC32RF45IRMP
✅ 直接替换📋 参考替代料（不在目录中）
ADS52J90IRGZT
✅ 直接替换📋 参考替代料（不在目录中）
ADS62P48IRGC25
✅ 直接替换✓ 有现货
$49.2 / 个
查看数据手册 →ADS62P23IRGC25
✅ 直接替换✓ 有现货
$18.85 / 个
查看数据手册 →PADC34J45IRGZT 最大额定值与电气特性
| 分辨率 | 14 bit |
| Number of Channels | 4 (quad) |
| Sample Rate | 160 MSPS (max) |
| Architecture | Pipelined |
| Input Type | Differential |
| Data Interface | JESD204B (subclass-0/-1) |
| Number of A/D Converters | 2 |
| 工作温度范围 | -40C to +85C |
| 封装 | 48-pin VQFN-EP (RGZ) 7.00 mm x 7.00 mm |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
PADC34J45IRGZT 引脚配置
| 引脚 1 | AIN0P — Differential analog input 0 (positive) |
| 引脚 2 | AIN0M — Differential analog input 0 (negative) |
| 引脚 3 | AIN1P — Differential analog input 1 (positive) |
| 引脚 4 | AIN1M — Differential analog input 1 (negative) |
| 引脚 5 | AIN2P — Differential analog input 2 (positive) |
| 引脚 6 | AIN2M — Differential analog input 2 (negative) |
| 引脚 7 | AIN3P — Differential analog input 3 (positive) |
| 引脚 8 | AIN3M — Differential analog input 3 (negative) |
| 引脚 9 | AVDD — Analog supply voltage (1.8 V nominal) |
| 引脚 10 | AVSS — Analog ground |
| 引脚 11 | VCM — Common-mode voltage output |
| 引脚 12 | REF — Internal reference decoupling |
| 引脚 13 | REFP — Positive reference |
| 引脚 14 | REFN — Negative reference |
| 引脚 15 | AVDD — Analog supply voltage |
| 引脚 16 | AVSS — Analog ground |
| 引脚 17 | CLKINP — Differential clock input (positive) |
| 引脚 18 | CLKINM — Differential clock input (negative) |
| 引脚 19 | AVDD — Analog supply voltage |
| 引脚 20 | AVSS — Analog ground |
| 引脚 21 | DOUT0P — JESD204B lane 0 output (positive) |
| 引脚 22 | DOUT0M — JESD204B lane 0 output (negative) |
| 引脚 23 | DOUT1P — JESD204B lane 1 output (positive) |
| 引脚 24 | DOUT1M — JESD204B lane 1 output (negative) |
| 引脚 25 | AVDD — Analog supply voltage |
| 引脚 26 | AVSS — Analog ground |
| 引脚 27 | DOUT2P — JESD204B lane 2 output (positive) |
| 引脚 28 | DOUT2M — JESD204B lane 2 output (negative) |
| 引脚 29 | DOUT3P — JESD204B lane 3 output (positive) |
| 引脚 30 | DOUT3M — JESD204B lane 3 output (negative) |
| 引脚 31 | DVDD — Digital supply voltage (1.8 V nominal) |
| 引脚 32 | DVSS — Digital ground |
| 引脚 33 | SYNCINBP — JESD204B SYNC input (positive) |
| 引脚 34 | SYNCINBM — JESD204B SYNC input (negative) |
| 引脚 35 | RESET — Hardware reset (active low) |
| 引脚 36 | PDN — Power-down (active high) |
| 引脚 37 | SCLK — SPI clock input |
| 引脚 38 | SDI — SPI data input |
| 引脚 39 | SDO — SPI data output |
| 引脚 40 | SEN — SPI chip enable (active low) |
| 引脚 41 | DVDD — Digital supply voltage |
| 引脚 42 | DVSS — Digital ground |
| 引脚 43 | GPIO0 — General-purpose I/O 0 |
| 引脚 44 | GPIO1 — General-purpose I/O 1 |
| 引脚 45 | GPIO2 — General-purpose I/O 2 |
| 引脚 46 | NC — Not connected (per datasheet) |
| 引脚 47 | NC — Not connected (per datasheet) |
| 引脚 48 | NC — Not connected (per datasheet) |
典型应用
PADC34J45IRGZT 适用于 6 应用s: Wideband Multi-Channel Communications Receiver, Phased-Array Radar Beamformer Digitizer, Ultrasound and Medical Imaging Front End, Wideband Oscilloscope and Digitizer, Software-Defined Radio (SDR) Platform, Industrial Test & Measurement Instrumentation.
Wideband Multi-Channel Communications Receiver
The PADC34J45IRGZT is an ideal digitizer for the 4-channel IF-sampling stage of a multi-standard communications receiver. Its 160 MSPS rate delivers approximately 80 MHz of usable Nyquist bandwidth per channel, enough for capturing 4G LTE carrier aggregation signals and most 5G sub-6 GHz waveforms. The JESD204B output moves the high-speed digital I/Q samples directly into an FPGA baseband processor, eliminating parallel LVDS routing congestion. Engineered placement of the 4 differential input pairs allows the receiver to sample two diversity branches and two MIMO streams simultaneously.
推荐
Phased-Array Radar Beamformer Digitizer
In a phased-array radar front end, the PADC34J45IRGZT digitizes the IF output of the analog beamformer for digital beam-steering across the antenna elements. Each of its 4 channels can handle a sub-array IF chain, and the deterministic latency of JESD204B is essential for coherent beamforming across multiple synchronized ADC chips on the same board. The 14-bit resolution preserves dynamic range across the radar return, while the 160 MSPS rate supports sub-array bandwidths up to 80 MHz typical for S-band surveillance radar. Designers cascade multiple PADC34J45 chips to scale to wider arrays.
推荐
Ultrasound and Medical Imaging Front End
The PADC34J45IRGZT's 14-bit resolution and 160 MSPS sample rate match the dynamic range and bandwidth requirements of a high-channel-count ultrasound beamformer. With 4 channels per chip, the front end can scale to 64 to 128 receive channels by cascading 16 to 32 devices, while the low-jitter JESD204B output reduces cable and connector density in cart-based imaging systems. The pipelined architecture delivers consistent latency across channels, which is critical for coherent beamforming and image reconstruction. The -40C to +85C temperature range supports portable cart and fixed-room deployments.
推荐
Wideband Oscilloscope and Digitizer
Test-and-measurement digitizers and wideband oscilloscopes use the PADC34J45IRGZT to capture up to 4 simultaneous high-bandwidth analog channels at 160 MSPS. The 14-bit resolution provides ~78 dB of dynamic range, sufficient to resolve small signal details next to large DC offsets in mixed-signal debug. The JESD204B output off-loads the digitized data into a high-end FPGA for real-time triggering, deep-memory storage, and segmented capture. Multi-board synchronization is supported because all ADCs in the PADC34J45 family share a deterministic-latency JESD204B interface.
推荐
Software-Defined Radio (SDR) Platform
The PADC34J45IRGZT serves as the dual-IF digitizer in software-defined radio platforms operating below ~80 MHz of instantaneous bandwidth. Its 4 differential input pairs let one chip handle a main and a diversity branch plus two auxiliary monitoring channels, while the JESD204B link feeds the raw I/Q samples into an FPGA-based polyphase filter bank. The 14-bit resolution maps to roughly 78 dB of SNR, supporting modem sensitivities down to -100 dBm or better with a low-noise front end. SDR developers typically pair the PADC34J45 with an RF tuner such as the LMX2572 and an FPGA such as the XC7Z020 SoC.
推荐
Industrial Test & Measurement Instrumentation
Multi-function industrial test equipment, including data-acquisition systems, vibration analyzers, and power-quality monitors, leverage the PADC34J45IRGZT to capture 4 synchronized channels of analog signals at 160 MSPS. The pipelined core delivers consistent DNL and INL behavior across temperature, important for long-term calibration stability in production-line testers. The JESD204B output pairs naturally with Xilinx Zynq or Kintex FPGAs that handle real-time protocol decoding, FFT analysis, and touchscreen data display. Industrial systems also benefit from the -40C to +85C temperature range and the absence of exotic cooling requirements.
推荐
推荐产品汇总
工程参考数据： PADC34J45IRGZT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PADC34J44IRGZT | ADC32RF45IRMP | ADS52J90IRGZT | ADS62P48IRGC25 | ADS62P23IRGC25 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-48 (RGZ) | VQFN-48 (RGZ) - same | VQFN-72 - different | VQFN-48 (RGZ) - same | VQFN-48 (RGZ) - same | VQFN-48 (RGZ) - same |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit | 12 bit |
| Number of Channels | 4 | 2 | 2 | 8 | 2 | 2 |
| Sample Rate (max) | 160 MSPS | 160 MSPS | 3000 MSPS | 100 MSPS | 210 MSPS | 210 MSPS |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Data Interface | JESD204B | JESD204B | JESD204B/C | JESD204B | Parallel LVDS | Parallel LVDS |
| Input Type | Differential | Differential | Differential | Differential | Differential | Differential |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
关键差异点
- Quad-channel true drop-in with JESD204B in VQFN-48 RGZ （对比 ADS62P48IRGC25)
- JESD204B deterministic latency vs parallel LVDS （对比 ADS62P48IRGC25)
- Higher sample rate than the ADS52J90 （对比 ADS52J90IRGZT)
设计说明
Estimated: The 48-pin VQFN-EP package offers a much lower thermal resistance than a non-EP 48-pin package, but a wideband ADC still dissipates noticeable power at 160 MSPS. The exposed thermal pad MUST be soldered to a continuous ground/power plane using an array of thermal vias for the die to remain within the -40C to +85C operating range. Without the thermal pad soldered, junction temperature can exceed 125C and trigger internal thermal shutdown or accelerate long-term wear. Allocate at least 1 square inch of unbroken copper directly under the pad and stitch it to the AGND/AVDD layer.
JESD204B serial lanes are extremely sensitive to PCB layout discontinuities. Use 100-ohm differential controlled-impedance routing, length-match each lane within 0.1 mm to its sibling pair, and avoid 90-degree bends - use gentle 45-degree curves. Decoupling for AVDD / DVDD / VCM must combine 1 uF and 0.01 uF ceramic capacitors placed within 5 mm of each supply pin, with the via length to the underlying power plane kept under 1.5 mm. Reference the TI JESD204B layout application note (SLLA618) for an exemplary stack-up.
Two common pitfalls with the PADC34J45IRGZT are (1) feeding the clock input with a single-ended CMOS source instead of a low-jitter LVPECH/LVDS differential driver and (2) neglecting to perform the on-chip calibration after every reset or power-cycle. Use a low-jitter clock synthesizer such as the LMK04828 or CDCM7005, and route the CLKINP/CLKINM pair with 100-ohm differential impedance. After every hard reset, software must write the calibration register sequence outlined in the datasheet before the JESD204B link comes up, otherwise the device may report incorrect conversion results or stable-link relock failures.
合规信息
RoHS and lead-free compliance per TI product page. AEQ-Q100, halogen-free, and REACH status not explicitly stated in the verified web data and should be confirmed with the manufacturer.
