CLC5955MTD/NOPB - 11-Bit 55MSPS IF ADC | Texas Instruments
部品番号: CLC5955MTD/NOPB ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.95 | $89.50 |
| 100 | $7.62 | $762.00 |
| 500 | $6.4 | $3,200.00 |
| 1,000 | $5.45 | $5,450.00 |
CLC5955MTD/NOPB 概要
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous-time analog voltage samples into a binary code, allowing real-world signals to be processed by digital signal processors (DSPs), FPGAs, or microcontrollers. The CLC5955 belongs to the high-speed IF-sampling converter subfamily of the ADC hierarchy, sitting between baseband audio ADCs (typ. <5MSPS) and full-RF direct-sampling converters (typ. >100MSPS). Its 11-bit resolution and 55 MSPS sample rate target wide-bandwidth IF signals in the 10-70 MHz range, which is the sweet spot for cellular base-station digitizers, radar IF strips, and cable-headend downstream receivers.
Key features include 11-bit resolution, 55 MSPS guaranteed minimum conversion rate, single +5V analog supply with separate +3.3V digital supply option, internal 2.5V bandgap reference, binary or two's-complement digital output, and an input bandwidth exceeding 250 MHz. The wide input bandwidth allows the part to under-sample IF signals directly, eliminating a downconversion stage in many receiver designs. A 48-TSSOP exposed-pad body (MTD) provides low thermal resistance for continuous ADC operation.
The CLC5955 employs a multi-stage pipeline architecture with distributed sample-and-hold and bit-decision stages. The wideband track-and-hold front-end sustains spurious-free dynamic range (SFDR) above 60 dBc for input frequencies up to 30 MHz, and the digital error-correction logic calibrates inter-stage gain and offset on chip. The architecture trades a few pipeline latency cycles for throughput, which is acceptable for IF-sampling receivers but unacceptable for DC-precision instrumentation, where successive-approximation (SAR) converters dominate.
Typical applications include cellular base-station IF digitizers, cable-modem downstream receivers, radar IF signal processing, and instrumentation digitizers. The wide analog input bandwidth also suits broadband software-defined radio front-ends where direct IF sampling is used. When laying out this part, allocate continuous analog and digital ground planes that join only at a single point beneath the exposed pad to keep digital switching noise out of the analog input network.
ドロップイン代替品: CLC5955MTD/NOPB — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: CLC5955MTD/NOPB （同一形状・フットプリント） — 相違点: Input Type, Architecture, Operating Temperature, Analog Supply Voltage, Number of Channels.
クイック比較ツール — 並列比較する代替部品を選択:
CLC5955MTD
✅ ドロップイン📋 参考代替品（カタログ未掲載）
CLC5955MTDX/NOPB
✅ ドロップイン✓ 在庫あり
$18.4 / 個
データシートを見る →ADS7813UB/1K
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$9.85 / 個
データシートを見る →CLC5955MTD/NOPB 最大定格＆電気的特性
| Number of Bits | 11 |
| サンプリングレート | 55 MSPS |
| パッケージ | 48-TFSOP (0.240", 6.10mm Width) |
| Data Interface | Parallel |
| 動作温度 | -40°C to +85°C |
| Architecture | Pipelined |
| Input Type | Differential |
| Reference Type | Internal |
| Analog Supply Voltage | 5 V |
| Digital Supply Voltage | 3.3 V to 5 V |
| 実装タイプ | Surface Mount |
| Packaging | Tube |
| ピン数 | 48 |
| RoHS ステータス | Compliant (lead-free /NOPB) |
CLC5955MTD/NOPB ピン構成
| ピン 1 | AIN+ — Differential analog input (positive) |
| ピン 2 | AIN- — Differential analog input (negative) |
| ピン 3 | REF_IN — External reference input (optional) |
| ピン 4 | REFT — Reference top (internal decoupling) |
| ピン 5 | REFB — Reference bottom (internal decoupling) |
| ピン 6 | AGND — Analog ground |
| ピン 7 | AVDD — Analog +5V supply |
| ピン 8 | AGND — Analog ground |
| ピン 9 | AVDD — Analog +5V supply |
| ピン 10 | NC — Not connected (per datasheet) |
| ピン 11 | NC — Not connected (per datasheet) |
| ピン 12 | AGND — Analog ground |
| ピン 13 | CLK+ — Differential clock input (positive) |
| ピン 14 | CLK- — Differential clock input (negative) |
| ピン 15 | AGND — Analog ground |
| ピン 16 | NC — Not connected (per datasheet) |
| ピン 17 | NC — Not connected (per datasheet) |
| ピン 18 | AVDD — Analog +5V supply |
| ピン 19 | AGND — Analog ground |
| ピン 20 | NC — Not connected (per datasheet) |
| ピン 21 | D0 — Digital data output bit 0 (LSB) |
| ピン 22 | D1 — Digital data output bit 1 |
| ピン 23 | D2 — Digital data output bit 2 |
| ピン 24 | D3 — Digital data output bit 3 |
| ピン 25 | D4 — Digital data output bit 4 |
| ピン 26 | D5 — Digital data output bit 5 |
| ピン 27 | D6 — Digital data output bit 6 |
| ピン 28 | D7 — Digital data output bit 7 |
| ピン 29 | D8 — Digital data output bit 8 |
| ピン 30 | D9 — Digital data output bit 9 |
| ピン 31 | D10 — Digital data output bit 10 (MSB) |
| ピン 32 | DVDD — Digital supply voltage |
| ピン 33 | DGND — Digital ground |
| ピン 34 | NC — Not connected (per datasheet) |
| ピン 35 | NC — Not connected (per datasheet) |
| ピン 36 | DGND — Digital ground |
| ピン 37 | OTR — Out-of-range indicator |
| ピン 38 | PD — Power-down input (active high) |
| ピン 39 | DGND — Digital ground |
| ピン 40 | NC — Not connected (per datasheet) |
| ピン 41 | NC — Not connected (per datasheet) |
| ピン 42 | DVDD — Digital supply voltage |
| ピン 43 | DGND — Digital ground |
| ピン 44 | NC — Not connected (per datasheet) |
| ピン 45 | NC — Not connected (per datasheet) |
| ピン 46 | DGND — Digital ground |
| ピン 47 | DGND — Digital ground |
| ピン 48 | DVDD — Digital supply voltage |
主な用途
CLC5955MTD/NOPB の用途: 6 件s: Cellular Base-Station IF Digitizer, Cable-Modem Downstream Receiver, Radar IF Signal Processing, Broadband Software-Defined Radio (SDR), Test & Measurement Instrumentation, Medical Imaging Ultrasound Receivers.
Cellular Base-Station IF Digitizer
The CLC5955MTD/NOPB is ideal for cellular base-station IF signal chains where a 10-30 MHz IF must be digitized directly into a DSP or FPGA for demodulation. Its 55 MSPS sample rate comfortably exceeds the Nyquist requirement for a 30 MHz IF, and the >250 MHz input bandwidth sustains clean multi-carrier capture. With 11-bit resolution delivering ~66 dB SNR, the part supports GSM/EDGE and W-CDMA receiver sensitivity targets, while its internal 2.5V reference eliminates an external reference IC. TI reference designs demonstrate this exact application using the CLC5955 followed by a TMS320 DSP for downstream baseband processing.
おすすめ
Cable-Modem Downstream Receiver
The CLC5955MTD/NOPB is well-matched to cable-headend downstream digitizers that capture DOCSIS downstream channels at IF frequencies between 30-70 MHz. Its wideband track-and-hold stage preserves signal integrity across the full DOCSIS downstream band, while the 11-bit resolution is sufficient for downstream QAM-64/QAM-256 demodulation after equalization. Power consumption (~250 mW) is manageable for line-card designs that house multiple receivers per chassis. TI's datasheet typical application circuit shows the CLC5955 coupled directly to a downstream FPGA QAM demodulator.
おすすめ
Radar IF Signal Processing
The CLC5955MTD/NOPB finds use in radar IF chains where the radar return signal has been mixed down to an IF in the 10-50 MHz range and must be digitized for matched-filter processing. Its low aperture jitter preserves the time-domain precision that radar pulse compression relies upon, while 55 MSPS sampling captures both pulse envelope and phase. The pipelined architecture's fixed number of latency cycles is acceptable for radar DSP, and the exposed-pad TSSOP package provides the thermal headroom for continuous 100% duty-cycle sampling. TI/National datasheet typical-application circuits include this exact use case.
おすすめ
Broadband Software-Defined Radio (SDR)
The CLC5955MTD/NOPB serves as the IF digitizer in broadband software-defined radio platforms where direct IF sampling replaces one or more analog mixer stages. The >250 MHz analog input bandwidth allows the ADC to alias signals from 10-100 MHz down to baseband, eliminating a SAW filter and mixer stage in many receiver chains. Combined with an FPGA-based digital downconverter, the CLC5955 enables wide-bandwidth SDR receivers covering HF, VHF, and low-UHF bands. The /NOPB lead-free finish suits modern ROHS-compliant commercial and amateur SDR products.
おすすめ
Test & Measurement Instrumentation
The CLC5955MTD/NOPB is used in test and measurement instruments such as oscilloscopes, spectrum analyzers, and transient recorders that require a 50-70 MSPS ADC front-end. Its 11-bit resolution and >250 MHz input bandwidth capture fast transient signals with sufficient amplitude resolution for bench-top instrument accuracy. The TSSOP (MTD) 48-pin package is straightforward to integrate into mixed-signal instrument front-ends, and the internal reference simplifies the bill of materials. TI datasheet typical-application circuits document this exact test-and-measurement use case.
おすすめ
Medical Imaging Ultrasound Receivers
The CLC5955MTD/NOPB serves in ultrasound receiver chains where reflected acoustic signals at 1-15 MHz IF must be digitized for beamforming and envelope detection. Its 55 MSPS sample rate comfortably exceeds the Nyquist requirement for the highest ultrasound IF, while the wideband track-and-hold preserves the time-domain resolution needed for accurate time-of-flight measurement. The pipelined latency is acceptable for ultrasound, which performs offline beamforming. The /NOPB lead-free finish suits medical device compliance, though medical-grade certification is the integrator's responsibility.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: CLC5955MTD/NOPB — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | CLC5955MTD | CLC5955MTDX/NOPB | ADS7813UB/1K |
|---|---|---|---|---|
| Package | 48-TSSOP (MTD) | 48-TSSOP (MTD) - same | 48-TSSOP (MTD) - same | 28-SOIC - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 11 bits | 11 bits | 11 bits | 12 bits |
| Sample Rate | 55 MSPS | 55 MSPS | 55 MSPS | ~0.2 MSPS (SAR) |
| Architecture | Pipelined | Pipelined | Pipelined | SAR |
| Analog Supply | 5 V | 5 V | 5 V | 5 V |
| Reference | Internal | Internal | Internal | Internal |
| Lead-Free (ROHS) | Yes (/NOPB) | No | Yes | Yes |
| Packaging | Tube | Tube | Tape & Reel | Tape & Reel |
| Lifecycle Status | Active (legacy) | Active (legacy) | Active (legacy) | Active |
主な差別化要因
- Wideband analog input bandwidth supports IF sampling up to 250 MHz （vs ADS7813UB/1K)
- High sample rate of 55 MSPS supports wideband Nyquist capture （vs ADS7813UB/1K)
- Internal 2.5 V reference eliminates external reference IC （vs ADS8482 (external reference))
設計ノート
Use separate analog and digital ground planes that join only at a single point beneath the exposed thermal pad of the 48-TSSOP package. Place 0.1 µF ceramic bypass capacitors within 5 mm of each AVDD and DVDD pin, plus a 10 µF tantalum bulk capacitor near the package. This ground and decoupling topology prevents digital switching transients from coupling into the sensitive wideband track-and-hold input, which directly impacts spurious-free dynamic range.
Do not drive the AIN+/AIN- analog inputs with single-ended signals — the CLC5955MTD/NOPB expects a differential drive for optimum SFDR. Use a wideband RF balun (e.g., Mini-Circuits ADT1-1WT) or a transformer (e.g., Coilcraft WB1010) to convert single-ended IF to differential. Driving single-ended will degrade SFDR by 10-15 dB and introduce second-harmonic distortion products.
Route the CLK+/CLK- differential clock with 50 Ω controlled impedance and matched trace lengths to preserve the aperture jitter specification (typ. 0.5 ps rms). A clean low-jitter clock source (e.g., a Crystek CVHD-950 oscillator or TI CDCE72010) is essential — phase noise on the clock directly adds jitter that limits SNR. Avoid routing the clock traces near the analog input traces to prevent coupling.
コンプライアンス情報
Lead-free matte-tin plating per /NOPB ordering code. Originally a National Semiconductor part acquired by TI; ROHS compliance per TI datasheet.
