CLC5957MTDX/NOPB - 12-Bit 70MSPS Broadband ADC | TI/NSC
MPN： CLC5957MTDX/NOPB ✓ 啟用中CLC5957MTDX/NOPB 概覽
An ADC (analog-to-digital converter) is an integrated circuit that samples continuous analog signals and converts each sample into a discrete digital code, forming the essential bridge between the analog and digital signal domains. ADC devices sit within the broader semiconductor taxonomy as: data converter -> ADC -> pipelined ADC -> high-speed ADC. The 12-bit resolution and 70 MSPS sampling rate place the CLC5957 firmly in the mid-resolution, high-speed tier used for communications, instrumentation, and radar/IF signal chains.
Key features include 70 MSPS minimum sample rate, 12-bit resolution with no missing codes, differential input architecture for high common-mode rejection, and a pipelined converter core with 3-clock-cycle latency. The internal track-and-hold supports broadband analog inputs suitable for undersampling IF signals, and the parallel data interface simplifies FPGA or ASIC downstream connections. A separate DAV (data available) output simplifies timing into external logic.
The CLC5957 uses a pipelined architecture with internal bandgap reference and proprietary calibration, balancing high sampling rate with low power. Its internal reference design eliminates the need for an external reference IC, simplifying the BOM while keeping drift low enough for communications-grade applications. The pipelined 3.0-clock latency is well-documented in the National Semiconductor datasheet and is deterministic for synchronization in multi-channel systems.
Typical applications include IF-sampled digital receivers in cellular base stations, broadband communications test equipment, radar and signal-intelligence (SIGINT) front ends, medical imaging, and high-speed data acquisition. The combination of 12-bit resolution, 70 MSPS, and broadband input bandwidth makes it well-suited to undersampling IF architectures where a single ADC replaces multiple downconversion stages.
When designing with this part, pay careful attention to analog input coupling, the layout of the AVCC and DVCC planes, and the use of a low-jitter encode clock to preserve SNR. A 1% or tighter tolerance external reference is not required because the reference is internal, but a clean low-noise analog supply rail is essential to achieving published dynamic performance.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical PCB design notes that go beyond the manufacturer datasheet, so engineers can quickly decide whether the CLC5957MTDX/NOPB fits their IF-sampling or broadband acquisition design.
直接替換替代品，適用於 CLC5957MTDX/NOPB — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： CLC5957MTDX/NOPB （相同外形與佔位） — 差異在於 Package / Case, Packaging, RoHS Status, Terminal Form.
CLC5957MTD/NOPB
✅ 直接替換📋 參考替代品（不在目錄中）
CLC5957MTDX
✅ 直接替換📋 參考替代品（不在目錄中）
ADS8401IPFBT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CLC5957MTDX/NOPB 最大額定值與電氣特性
| Number of Bits | 12 |
| Sampling Rate (Per Second) | 70 MSPS |
| Number of Inputs | 1 (differential) |
| Input Type | Differential |
| Data Interface | Parallel |
| Configuration | S/H-ADC |
| Architecture | Pipelined |
| Reference Type | Internal |
| Operating Supply Voltage (Analog) | 5 V |
| Operating Supply Voltage (Digital) | 5 V |
| 工作溫度範圍 | -40 C to +85 C |
| Pipeline Latency | 3.0 clock cycles |
| 封裝 / 外殼 | 48-TFSOP (0.240", 6.10 mm width) |
| 安裝類型 | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Terminal Form | GULL WING |
| Temperature Grade | INDUSTRIAL |
| RoHS 狀態 | Compliant (NOPB suffix indicates Pb-free) |
CLC5957MTDX/NOPB 48-tfsop (0.240", 6.10 mm width) 腳位配置指南
CLC5957MTDX/NOPB（48-tfsop (0.240", 6.10 mm width) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： CLC5957MTDX/NOPB.
請參閱 資料表 以查看完整腳位配置。
典型應用
CLC5957MTDX/NOPB 適用於 6 應用s: Cellular Base-Station IF-Sampling Receiver, Broadband Communications Test Equipment, Radar and SIGINT Front-End Digitizer, Medical Imaging Data Acquisition, High-Speed Data Acquisition Systems, Software-Defined Radio (SDR) IF Digitizer.
Cellular Base-Station IF-Sampling Receiver
The CLC5957MTDX/NOPB's 12-bit resolution and 70 MSPS sampling rate suit cellular base-station digital-IF architectures where a single ADC replaces multiple analog downconversion stages. Its broadband differential input stage supports undersampling of IF carriers in the 30-70 MHz range, preserving signal integrity for subsequent digital demodulation. The 3.0-clock pipeline latency is deterministic, allowing multi-channel coherent receiver synchronization. The internal reference and integrated track-and-hold minimize the external BOM, while separate AVDD/DVDD pins simplify PCB partitioning to maintain 70 dB+ SNR at the antenna interface.
推薦
Broadband Communications Test Equipment
For broadband communication testers and signal analyzers, the CLC5957MTDX/NOPB provides 12-bit acquisition at 70 MSPS with low-jitter ENCODE support, enabling accurate capture of multi-MHz waveforms. Its wide analog input bandwidth makes it ideal for digitizing QAM, OFDM, or wideband FM test signals without an external anti-alias filter bank. The parallel CMOS data output reduces latency to the FPGA, supporting real-time DSP for EVM and ACLR measurements. A low-jitter external encode clock (such as the AS1521) is recommended to preserve the converter's SNR at high input frequencies.
推薦
Radar and SIGINT Front-End Digitizer
The CLC5957MTDX/NOPB is well-suited to radar and signal-intelligence (SIGINT) front ends requiring sub-100 MSPS undersampling of intermediate frequencies. Its 12-bit dynamic range and broadband input allow direct digitization of pulsed RF signals at 30-50 MHz IF, eliminating an analog downconversion stage. The deterministic 3-clock latency eases time-of-arrival alignment in phased-array and direction-finding systems. Differential analog inputs reject common-mode noise from RF front-end mixers, while separate AVDD/DVDD supplies preserve 60-65 dB SFDR in the presence of digital switching noise.
推薦
Medical Imaging Data Acquisition
In medical imaging systems such as ultrasound beamformers and CT detector front ends, the CLC5957MTDX/NOPB provides 12-bit acquisition at 70 MSPS with a pipelined architecture suited to multi-channel parallel sampling. Its internal reference reduces per-channel calibration overhead, while the parallel interface simplifies FPGA-based digital beamforming. The 3-clock pipeline latency is well-defined for time-aligning arrays of ADCs across a beamformer aperture. Industrial temperature grade (-40 C to +85 C) supports portable diagnostic carts and bedside imaging platforms.
推薦
High-Speed Data Acquisition Systems
The CLC5957MTDX/NOPB fits general-purpose high-speed data acquisition cards in industrial test, vibration analysis, and laboratory instrumentation. Its 70 MSPS sample rate and 12-bit resolution support time-domain captures of transients, impulses, and broadband mechanical vibrations. The TSSOP-48 surface-mount package and parallel digital interface enable compact 4-layer PCB designs with FPGA downstream processing. The internal reference and integrated track-and-hold reduce analog front-end complexity, and the 5 V supply requirement simplifies integration with standard industrial power rails.
推薦
Software-Defined Radio (SDR) IF Digitizer
For software-defined radio platforms, the CLC5957MTDX/NOPB provides IF-sampling capability at 70 MSPS with 12-bit resolution, enabling direct digitization of 21-35 MHz intermediate frequencies from a single analog mixing stage. Its differential inputs reject common-mode noise from RF mixers and LNA stages, while the parallel CMOS data interface streams samples into FPGAs running open-source SDR frameworks. The deterministic 3-clock pipeline latency simplifies time-synchronization across multiple SDR channels. Industrial temperature grade and lead-free packaging support ruggedized deployable radio systems.
推薦
推薦產品摘要
工程參考資料，適用於 CLC5957MTDX/NOPB — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | CLC5957MTD/NOPB | CLC5957MTDX | ADS8401IPFBT |
|---|---|---|---|---|
| Brand | Texas Instruments (NSC) | Texas Instruments (NSC) | Texas Instruments (NSC) | Texas Instruments |
| Package | 48-TSSOP (MTD) | 48-TSSOP (MTD) - same | 48-TSSOP (MTD) - same | 48-TQFP (PFB) - different package, same pin count |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 70 MSPS | 70 MSPS | 70 MSPS | 1 MSPS |
| Number of Inputs | 1 differential | 1 differential | 1 differential | 1 differential/pseudo |
| Architecture | Pipelined | Pipelined | Pipelined | SAR |
| Reference Type | Internal | Internal | Internal | External |
| Data Interface | Parallel | Parallel | Parallel | Parallel / serial |
| Pipeline Latency | 3.0 clock cycles | 3.0 clock cycles | 3.0 clock cycles | 0 (SAR, latency-free) |
| RoHS Compliance | Yes (NOPB) | Yes (NOPB) | No (leaded) | Yes |
主要差異化特點
- Internal reference eliminates external reference IC (對比ADS8401IPFBT)
- 70 MSPS enables true IF sampling (對比ADS8401IPFBT)
- Deterministic 3-clock pipeline latency for multi-channel coherence (對比ADS8401IPFBT)
設計說明
Use a 4-layer PCB with a dedicated ground plane under the CLC5957. Split AVDD and DVDD planes so digital return currents do not flow under the analog input pins; join them at a single point near the ADC. Place AVDD 5 V and DVDD 5 V decoupling capacitors (10 uF bulk + 0.1 uF + 0.01 uF ceramics) within 3 mm of each supply pin. Keep the ENCODE clock trace short and surrounded by ground to minimize jitter.
Drive the ENCODE clock from a low-jitter source such as the AS1521. Each picosecond of encode jitter degrades SNR by approximately 0.5 dB at 70 MSPS. For undersampling IF inputs, the analog input network should present a 50 ohm differential termination, and a balun (e.g. ADT1-1WT or equivalent) should be used if the upstream stage is single-ended. Keep analog input traces matched in length to within 1 mm to preserve the differential balance and maximize SFDR.
Do not exceed the AVDD/DVDD absolute maximum of 6.5 V. The internal reference cannot be overdriven - the REF pin is not designed to accept an external reference voltage. A separate DAV (data available) output is provided; do not use the falling clock edge of the parallel interface for synchronization, because the CLC5957's pipeline latency means the data is only valid relative to DAV. Re-examine timing at 70 MSPS in slow corners if your system runs at -40 C.
合規資訊
NOPB suffix indicates lead-free (Pb-free) matte-tin finish per TI/NSC packaging convention. RoHS and REACH compliance assumed for NOPB parts; AEC-Q100 not applicable to commercial/industrial grade ADCs. Conflict minerals reporting compliant per TI corporate policy.
