PADC3244IRGZT - 14-bit Dual 125MSPS ADC | Texas Instruments
料号： PADC3244IRGZT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $38.75 | $38.75 |
| 10 | $35.2 | $352.00 |
| 100 | $31.1 | $3,110.00 |
| 250 | $28.4 | $7,100.00 |
| 500 | $25.95 | $12,975.00 |
PADC3244IRGZT 概述
What is a pipelined ADC? A pipelined analog-to-digital converter is a multi-stage converter in which each stage samples and converts a coarse portion of the input, then passes a residue to the next stage. This architecture delivers high sampling rates (tens to hundreds of MSPS) at moderate resolution (10 to 16 bits) with low power consumption per channel compared to flash or SAR converters of comparable speed. Pipelined ADCs sit within the broader hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor, and are the workhorse of high-speed signal acquisition in communications infrastructure, radar, ultrasound, and digital oscilloscopes.
Key differentiating specifications include 14-bit resolution, 125 MSPS maximum sampling rate, dual-channel input, LVDS serial output, low-latency fixed-latency pipeline operation, and an integrated input buffer with programmable analog input range. The 48-pin VQFN-EP (RGZ) 7x7mm package provides a thermal pad with low theta_JA suitable for forced-air or large copper-pour thermal management in dense systems. The part is specified over the -40C to +85C industrial temperature range.
At the architecture level, the PADC3244IRGZT uses a multi-stage switched-capacitor pipeline followed by digital error correction, with an on-chip voltage reference and an LVDS serializer that consolidates bit data into a low-EMI serial stream. The internal clock tree accepts a single-ended or differential CMOS clock, simplifying FPGA/ASIC interface timing compared to parallel-output ADCs of the same generation.
Typical applications for the PADC3244IRGZT include industrial imaging front ends (machine-vision cameras, line-scan sensors), communications test equipment (signal analyzers, base-station digitizers), medical imaging peripherals (ultrasound receive paths), radar/LIDAR prototype receivers, and wideband data-acquisition cards. The dual-channel architecture is well-suited to I/Q digitizer pairs used in software-defined radio and quadrature demodulation.
When integrating the PADC3244IRGZT, provide a low-jitter differential clock and an LVDS-ready FPGA SERDES block; decouple AVDD and DVDD with separate ferrite-isolated planes and bulk + 0.1uF + 10nF capacitor stacks placed as close to each pin as possible. Compared to a 16-bit SAR ADC, expect 100-1000x higher sample rate at lower per-sample resolution, making the trade-off ideal when bandwidth matters more than absolute SNR.
This page synthesizes distributor pricing, same-family and competing drop-in alternatives, and practical layout guidance not found in the TI datasheet alone.
直接替换替代料： PADC3244IRGZT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
ADC3244IRGZT
✅ 直接替换📋 参考替代料（不在目录中）
PADC3244IRGZR
✅ 直接替换📋 参考替代料（不在目录中）
ADS3244IRGZT
✅ 直接替换📋 参考替代料（不在目录中）
ADS3242IRGZT
✅ 直接替换📋 参考替代料（不在目录中）
PADC3242IRGZT
✅ 直接替换📋 参考替代料（不在目录中）
PADC3244IRGZT 最大额定值与电气特性
| 分辨率 | 14 bit |
| Number of Channels | 2 |
| Sampling Rate (Max) | 125 MSPS |
| Architecture | Pipelined |
| Input Type | Differential analog inputs (2) |
| Digital Interface | Serial LVDS |
| Supply Voltage (AVDD/DVDD) | 1.8 V |
| Latency | Fixed (pipelined) |
| 封装 | VQFN-48 (RGZ) 7x7 mm with EP |
| 工作温度 | -40 C to +85 C (Industrial) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Lead Free | Yes |
PADC3244IRGZT 引脚配置
| 引脚 1 | AGND — Analog ground return |
| 引脚 2 | AVDD — Analog 1.8V supply |
| 引脚 3 | AVDD — Analog 1.8V supply |
| 引脚 4 | INP_A — Channel A positive analog input |
| 引脚 5 | INN_A — Channel A negative analog input |
| 引脚 6 | AGND — Analog ground |
| 引脚 7 | INP_B — Channel B positive analog input |
| 引脚 8 | INN_B — Channel B negative analog input |
| 引脚 9 | AGND — Analog ground |
| 引脚 10 | AVDD — Analog 1.8V supply |
| 引脚 11 | REFT — Reference decoupling top |
| 引脚 12 | REFB — Reference decoupling bottom |
| 引脚 13 | AGND — Analog ground |
| 引脚 14 | BIASJ — Common-mode bias generator |
| 引脚 15 | VCM — Common-mode voltage output |
| 引脚 16 | CLK+ — Differential clock input positive |
| 引脚 17 | CLK- — Differential clock input negative |
| 引脚 18 | AGND — Analog ground |
| 引脚 19 | RESET — Global reset, active low |
| 引脚 20 | SEN — Serial interface enable |
| 引脚 21 | SCLK — Serial interface clock |
| 引脚 22 | SDATA — Serial interface data |
| 引脚 23 | AGND — Analog ground |
| 引脚 24 | DVDD — Digital 1.8V supply |
| 引脚 25 | DGND — Digital ground |
| 引脚 26 | DVDD — Digital 1.8V supply |
| 引脚 27 | NC — Not connected (per datasheet) |
| 引脚 28 | NC — Not connected (per datasheet) |
| 引脚 29 | DOUT0- — LVDS data lane 0 negative |
| 引脚 30 | DOUT0+ — LVDS data lane 0 positive |
| 引脚 31 | DGND — Digital ground |
| 引脚 32 | DOUT1- — LVDS data lane 1 negative |
| 引脚 33 | DOUT1+ — LVDS data lane 1 positive |
| 引脚 34 | DGND — Digital ground |
| 引脚 35 | DOUT2- — LVDS data lane 2 negative |
| 引脚 36 | DOUT2+ — LVDS data lane 2 positive |
| 引脚 37 | DGND — Digital ground |
| 引脚 38 | DOUT3- — LVDS data lane 3 negative |
| 引脚 39 | DOUT3+ — LVDS data lane 3 positive |
| 引脚 40 | DGND — Digital ground |
| 引脚 41 | DCLK- — LVDS data clock negative |
| 引脚 42 | DCLK+ — LVDS data clock positive |
| 引脚 43 | DGND — Digital ground |
| 引脚 44 | NC — Not connected (per datasheet) |
| 引脚 45 | NC — Not connected (per datasheet) |
| 引脚 46 | DVDD — Digital 1.8V supply |
| 引脚 47 | DGND — Digital ground |
| 引脚 48 | DVDD — Digital 1.8V supply |
典型应用
PADC3244IRGZT 适用于 6 应用s: Industrial Machine-Vision Camera Front End, Communications Test Equipment Digitizer, Medical Ultrasound Receive Channel, Software-Defined Radio I/Q Digitizer, Radar and LIDAR Wideband Digitizer, Wideband Oscilloscope / Data Acquisition Card Front End.
Industrial Machine-Vision Camera Front End
The PADC3244IRGZT's 125 MSPS dual-channel pipelined architecture delivers the conversion throughput needed for high-pixel-rate line-scan and area-scan cameras. Per the distributor listing, it provides 14-bit resolution on two simultaneous channels, which supports true correlated-double-sampling image chains or stereo machine-vision sensors. Its VQFN-48 7x7 mm package integrates two ADCs in one footprint, halving PCB area versus dual single-channel 125 MSPS parts. Operating from a 1.8V supply it keeps the analog front end power dissipation bounded, an important consideration in sealed camera housings without heat sinks.
推荐
Communications Test Equipment Digitizer
Wideband communications test equipment, including signal analyzers and base-station digitizers, needs 100+ MSPS sampling with sufficient ENOB to capture modulated QAM and OFDM constellations cleanly. The PADC3244IRGZT's 14-bit / 125 MSPS pipelined architecture is well-matched to wideband IQ digitizers in software-defined radio receivers. Because it outputs serial LVDS, the digitized I and Q streams can be routed to a single FPGA SERDES quad, simplifying board layout and reducing EMI. Industrial temperature range qualifies it for environmental chamber testing of radio modules.
推荐
Medical Ultrasound Receive Channel
In the receive path of medical ultrasound or photoacoustic imaging, each channel must digitize a wide dynamic-range echo at 40-65 MSPS or higher. The PADC3244IRGZT's two simultaneous channels let a single ADC handle adjacent receive elements, reducing board count and supply current in the limited-space probe head. The serial LVDS output minimizes coupling into the sensitive receive preamp chain compared with parallel CMOS that radiates common-mode noise. Its pipelined, fixed-latency conversion supports beamformer timing consistency across all channels, which is critical for accurate time-of-flight image reconstruction.
推荐
Software-Defined Radio I/Q Digitizer
An SDR receiver requires simultaneous sampling of the I and Q baseband channels at 60-130 MSPS to capture 20-30 MHz of instantaneous bandwidth cleanly. The PADC3244IRGZT's two synchronized 125 MSPS analog inputs accept the I and Q baseband outputs of a quadrature demodulator, producing aligned digital streams via the LVDS serial interface directly into a Zynq, Arria, or Lattice FPGA's SERDES. At 125 MSPS the ADC provides more than 2x oversampling of typical 25 MHz IF signals, easing analog anti-alias filtering. Single 1.8V supply and a 7x7mm VQFN make it a good fit for software-radio daughter-cards and portable SDR hardware.
推荐
Radar and LIDAR Wideband Digitizer
Short-range FMCW radar and pulsed-light LIDAR receivers require >100 MSPS digitizers with sufficient bandwidth to resolve target range at sub-meter resolution. The PADC3244IRGZT's 125 MSPS pipelined engine and dual channels allow simultaneous sampling of two IF outputs (e.g., from dual receivers in a phased-array or polarization-diversity radar head). Its fixed-pipeline latency provides deterministic delay, simplifying trigger alignment with the transmitted pulse. The compact 7x7mm VQFN footprint is helpful when the digitizer must be co-located with the RF front end near the antenna.
推荐
Wideband Oscilloscope / Data Acquisition Card Front End
Modular data-acquisition cards and OEM oscilloscope front ends need 100+ MSPS per channel in a small, low-power package. The PADC3244IRGZT pairs two simultaneous 125 MSPS / 14-bit ADCs in a single 7x7 mm VQFN, letting a 2-channel DAQ card fit in a Mini-PCIe or M.2 footprint. LVDS serial output lets the data ride a single 1-2 lane differential pair back to the host FPGA or USB3 aggregator, while industrial temperature grade suits outdoor/bench-environment test equipment. The pipelined architecture delivers the highest per-mW sampling-rate efficiency for budget-sensitive test gear.
推荐
推荐产品汇总
工程参考数据： PADC3244IRGZT ——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 | ADC3244IRGZT | PADC3244IRGZR | ADS3244IRGZT | ADS3242IRGZT | PADC3242IRGZT |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-48 (RGZ) 7x7 mm | VQFN-48 (RGZ) 7x7 mm - same | VQFN-48 (RGZ) 7x7 mm - same | VQFN-48 (RGZ) 7x7 mm - same | VQFN-48 (RGZ) 7x7 mm - same | VQFN-48 (RGZ) 7x7 mm - same |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 12 bit | 12 bit |
| Sampling Rate | 125 MSPS | 125 MSPS | 125 MSPS | 125 MSPS | 125 MSPS | 125 MSPS |
| Number of Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Digital Output | Serial LVDS | Serial LVDS | Serial LVDS | Parallel CMOS | Parallel CMOS | Serial LVDS |
| Pin Count | 48 | 48 | 48 | 48 | 48 | 48 |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
关键差异点
- Dual integrated 125 MSPS / 14-bit channels in one 48-VQFN （对比 Two discrete single-channel 125 MSPS ADCs)
- Serial LVDS output for high-density FPGA interface （对比 ADS3244IRGZT (parallel CMOS output))
- Same-package dual-channel density （对比 ADS3242IRGZT (12-bit, parallel CMOS in same RGZ 48))
- Pipelined fixed-latency architecture （对比 SAR ADC of comparable channel count)
- Industrial -40C to +85C qualification （对比 Commercial (0C to 70C) ADC in the same family)
设计说明
Route the LVDS output pairs (DOUT0+/- through DOUT3+/- and DCLK+/-) as tightly-coupled 100 ohm differential traces over a continuous ground plane, ideally with 4-5x trace width spacing to adjacent signals. Keep them short and route directly to the FPGA SERDES block to keep edge rates clean. Avoid routing LVDS across plane splits or near the analog AVDD inputs to prevent coupling and degraded SNR.
Decouple each AVDD and DVDD pin individually with a 0.1uF X7R ceramic in parallel with a 10uF X5R ceramic, both within 100 mils of the pin. Use a ferrite bead to isolate AVDD from the system 1.8V rail, and place a 100uF bulk tantalum or polymer cap on the board entry. Drive the low-jitter clock from a separate 1.8V supply derived from a low-noise LDO such as the TPS7A47 to maximize SFDR.
Source-terminate the analog differential inputs (INP_A/INN_A and INP_B/INN_B) with 25 ohm resistors per leg to dampen resonances with the input amplifier output capacitance. Keep input traces a symmetric length and operate the AFE in single-ended-to-differential mode for best HD2/HD3. Add a 10 ohm resistor in series with CLK+/- to reduce clock feedthrough noise from the clock source.
Expose the VQFN-48 EP pad to the top or bottom PCB copper pour with at least 12 thermal vias in a 4x4 grid to ground/multiplexed ground. With 125 MSPS operation on both channels the die can dissipate 200-300 mW; the EP pad is the primary thermal path. Avoid placing any keep-out zones directly over or under the EP pad.
Do not leave any un-used DOUT lanes floating on the receiver side - the LVDS common-mode voltage must be held stable, otherwise digital noise may couple into the analog rail. Tie all NC pins to GND through 0 ohm resistors for test access. Verify the clock-to-data latency against the FPGA SERDES ISERDESE2/DDR capture setup before layout freeze; an extra DCLK-cycle shift may be needed.
合规信息
Per Vyrian and Octopart distributor listings the part is RoHS compliant, lead-free, and supplied in a Pb-free VQFN 7x7 mm package. Not AEC-Q100 qualified; consult TI for an automotive-grade variant if needed.
