ADC1175-50CIMTX - 8-Bit 50 MSPS 125mW ADC | Texas Instruments
部品番号: ADC1175-50CIMTX ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $5.92 | $5.92 |
| 10 | $5.18 | $51.80 |
| 100 | $4.2 | $420.00 |
| 500 | $3.42 | $1,710.00 |
| 1,000 | $2.85 | $2,850.00 |
ADC1175-50CIMTX 概要
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuous-time, continuous-amplitude analog voltages into discrete digital codes. ADCs sit at the boundary between the analog front-end and the digital processing chain, occupying a critical position in the signal-path hierarchy of sensor, instrumentation, communications, and imaging systems. As a flash-derived two-step (subranging) architecture, the ADC1175-50 offers lower power and lower die cost than full-flash designs while still supporting 50 MSPS conversion, making it a typical mid-speed video/IF digitizer solution.
Key features of the ADC1175-50CIMTX include 50 MSPS maximum sample rate, 8-bit resolution, 6.8 ENOB at 25 MHz input, 125 mW typical power dissipation from a single 5 V analog supply plus 3.3 V or 5 V digital supply, on-chip input clamp, and internal reference. The two-step architecture achieves a 6.8 Effective Bit figure at Nyquist input, supporting video bandwidth and intermediate-frequency digitization in communications receivers. The 24-pin TSSOP package uses standard 0.65 mm lead pitch, simplifying PCB layout with conventional 4-layer FR-4 stack-ups.
The ADC1175-50CIMTX digitizes analog baseband or IF signals in video capture cards, set-top boxes, digital still cameras, and intermediate-frequency processing for digital communications. Designers select this part when system cost, power budget, and 8-bit resolution are sufficient for the application, but higher-resolution 10/12/14-bit SAR or pipeline ADCs would be over-specified. The 5 V single-ended analog input simplifies front-end anti-alias filtering, and the LVTTL/CMOS-compatible digital outputs interface directly with ASICs, FPGAs, or microcontrollers without level shifters.
A primary design consideration is the relationship between analog input bandwidth and clock frequency. To satisfy Nyquist, the analog input must be band-limited below 25 MHz when clocking at 50 MSPS. Decoupling requires 0.1 uF ceramic capacitors placed within 5 mm of the AVDD and DVDD pins, and the exposed thermal pad (when present) should be soldered to a ground pour to reduce junction temperature and ground bounce. Designers should also verify the ADC1175-50CIMTX/NOPB variant is used when RoHS compliance is required for end-markets.
This page consolidates distributor stock, verified drop-in alternatives in the same 24-pin TSSOP footprint, and practical design guidance synthesized from the manufacturer datasheet and application notes - offering a level of cross-reference and engineering context that individual distributor listings do not.
ドロップイン代替品: ADC1175-50CIMTX — 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: ADC1175-50CIMTX （同一形状・フットプリント） — 相違点: Analog Supply Voltage, Architecture, Digital Supply Voltage, Effective Number of Bits (ENOB), Input Type.
クイック比較ツール — 並列比較する代替部品を選択:
ADC1175-50CIMTX/NOPB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADC1175-50CIMT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADC1175-50CIMTX 最大定格＆電気的特性
| 分解能 | 8 bits |
| Sample Rate (Max) | 50 MSPS |
| Number of Input Channels | 1 |
| Architecture | Two-Step (Subranging) |
| Effective Number of Bits (ENOB) | 6.8 bits (at fIN = 25 MHz, fCLK = 50 MHz) |
| Analog Supply Voltage | 5 V (typ) |
| Digital Supply Voltage | 3.3 V or 5 V |
| Power Dissipation (Typ) | 125 mW |
| Analog Input Range | 1 Vp-p (typ, single-ended) |
| Input Type | Single-ended analog input |
| Digital Output Interface | Parallel CMOS / LVTTL |
| Reference | Internal (on-chip) |
| 動作温度範囲 | -20C to +75C |
| パッケージ | 24-pin TSSOP (PW) |
| Lead Pitch | 0.65 mm |
| 実装タイプ | Surface Mount |
| MSLレベル | 1 (per JEDEC J-STD-020) |
| RoHS ステータス | Compliant (NOPB suffix) |
ADC1175-50CIMTX ピン構成
| ピン 1 | VIN — Analog input |
| ピン 2 | AGND — Analog ground |
| ピン 3 | AGND — Analog ground |
| ピン 4 | VREF — Reference voltage (internal) |
| ピン 5 | AVDD — Analog +5 V supply |
| ピン 6 | AVDD — Analog +5 V supply |
| ピン 7 | AGND — Analog ground |
| ピン 8 | CLK — Conversion clock input |
| ピン 9 | DGND — Digital ground |
| ピン 10 | DGND — Digital ground |
| ピン 11 | DVDD — Digital supply (3.3 V or 5 V) |
| ピン 12 | DVDD — Digital supply (3.3 V or 5 V) |
| ピン 13 | OE — Output enable (active low) |
| ピン 14 | PD — Power-down (active high) |
| ピン 15 | D7 — Digital output bit 7 (MSB) |
| ピン 16 | D6 — Digital output bit 6 |
| ピン 17 | D5 — Digital output bit 5 |
| ピン 18 | D4 — Digital output bit 4 |
| ピン 19 | D3 — Digital output bit 3 |
| ピン 20 | D2 — Digital output bit 2 |
| ピン 21 | D1 — Digital output bit 1 |
| ピン 22 | D0 — Digital output bit 0 (LSB) |
| ピン 23 | NC — Not connected (per datasheet) |
| ピン 24 | NC — Not connected (per datasheet) |
主な用途
ADC1175-50CIMTX の用途: 6 件s: Digital Video Capture and Imaging, Intermediate Frequency (IF) Sampling for Communications Receivers, Set-Top Box and Digital TV Tuner Signal Chain, Digital Still Camera Image Pipeline, Portable Test and Measurement Instrumentation, Ultrasound and Medical Imaging Front-End.
Digital Video Capture and Imaging
The ADC1175-50CIMTX's 8-bit resolution and 50 MSPS sample rate directly match the bandwidth requirements of component-video digitizers (480i/576i at 27 MSPS, composite NTSC at 14.3 MSPS). Its 6.8 ENOB at 25 MHz input is sufficient for standard-definition chroma demodulation in set-top boxes and PC video capture cards. Designers pair the ADC with a 5 MHz low-pass anti-alias filter ahead of the analog input, then route the parallel CMOS outputs directly to an FPGA or video processor. The 125 mW typical power dissipation keeps thermal load in a sealed enclosure manageable without a heatsink.
おすすめ
Intermediate Frequency (IF) Sampling for Communications Receivers
With 50 MSPS, the ADC1175-50CIMTX can directly sample IF signals up to 25 MHz (Nyquist) in narrowband digital receivers used in two-way radio, pagers, and low-cost SDR front-ends. Its two-step architecture provides the 6.8 ENOB dynamic range needed to resolve QAM/PSK constellations at moderate symbol rates. A 5 V analog front-end with 1 Vp-p input range simplifies the AGC stage, and the CMOS outputs connect to a DSP or FPGA for channelization. The 125 mW power budget suits battery-operated handheld radios where thermal management is critical.
おすすめ
Set-Top Box and Digital TV Tuner Signal Chain
The ADC1175-50CIMTX serves as the baseband digitizer in digital set-top box receivers, where a tuner IC down-converts the RF channel to a low-IF or zero-IF baseband. Its 8-bit resolution and 50 MSPS are well-matched to 7-8 MHz wide DVB-T or ATSC channels, and the 5 V analog input integrates with tuner IC outputs without level translation. The 24-pin TSSOP package sits beside the demodulator IC on a 4-layer FR-4 board, with the exposed pad (if present on a variant) providing thermal relief. Cost-sensitive consumer STB designs favor the 8-bit ADC over 10-bit alternatives for sub-2 USD BOM impact.
おすすめ
Digital Still Camera Image Pipeline
In early-generation digital cameras and webcams, the ADC1175-50CIMTX digitizes the analog output of a CCD or CMOS image sensor at pixel-clock rates up to 50 MHz. Its 8-bit dynamic range captures luminance and chroma information for 1.3 to 3 megapixel sensors with sRGB output. The 5 V analog supply is compatible with common CCD bias voltages, and the parallel digital outputs feed a DSP for JPEG compression. The 24-pin TSSOP package is small enough for compact camera modules, and the 125 mW dissipation avoids the need for a heatsink in the camera housing.
おすすめ
Portable Test and Measurement Instrumentation
Handheld oscilloscopes, logic analyzers, and bench-top spectrum analyzers in the 25-50 MHz bandwidth class use the ADC1175-50CIMTX to digitize one or two channels at full bandwidth. Its 8-bit resolution provides 0.4 percent of full-scale quantization, which is sufficient for general-purpose scope displays. The 5 V single-supply operation simplifies battery-powered designs, and the LVTTL outputs can drive a 3.3 V MCU or FPGA directly. The 24-pin TSSOP package allows compact front-end board layouts in pocket-sized instruments.
おすすめ
Ultrasound and Medical Imaging Front-End
Low-cost portable ultrasound and Doppler blood-flow instruments use the ADC1175-50CIMTX to digitize demodulated audio-bandwidth or low-IF signals from the transducer pre-amplifier chain. The 8-bit resolution and 50 MSPS sample rate exceed the Nyquist requirement for 1-10 MHz medical ultrasound front-end stages. The 5 V analog supply rail is shared with the transducer pulser, and the parallel outputs feed a DSP for envelope detection and image reconstruction. Designers select this part for sub-50 USD BOM targets in handheld diagnostic devices.
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: ADC1175-50CIMTX — 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 | ADC1175-50CIMTX/NOPB | ADC1175-50CIMT |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 24-TSSOP (PW) | 24-TSSOP (PW) - same | 24-TSSOP (PW) - same |
| Resolution | 8 bits | 8 bits | 8 bits |
| Sample Rate (Max) | 50 MSPS | 50 MSPS | 50 MSPS |
| ENOB (typ) | 6.8 bits at 25 MHz | 6.8 bits at 25 MHz | 6.8 bits at 25 MHz |
| Power Dissipation (Typ) | 125 mW | 125 mW | 125 mW |
| Analog Supply | 5 V | 5 V | 5 V |
| RoHS Status | Non-RoHS (SnPb) | RoHS compliant | Non-RoHS (SnPb) |
| Shipping Format | Tape & Reel (large reel) | Tape & Reel | Tray |
| Operating Temperature | -20C to +75C | -20C to +75C | -20C to +75C |
主な差別化要因
- Same 5 V analog supply, lower quiescent power than full-flash 8-bit ADCs （vs TLC5540 (40 MSPS, 8-bit))
- RoHS-compliant drop-in for the legacy non-NOPB version （vs ADC1175-50CIMTX/NOPB)
- On-chip input clamp reduces external protection BOM （vs Generic 8-bit 50 MSPS ADCs without input clamp)
設計ノート
Decouple the AVDD (pin 5/6) and DVDD (pin 11/12) supplies with 0.1 uF ceramic capacitors placed within 5 mm of the respective pins, plus a 10 uF bulk tantalum or ceramic on each supply. Use separate analog and digital ground planes joined at a single point under the IC to avoid digital switching noise coupling into the analog input. The 125 mW typical power dissipation at 50 MSPS is acceptable for a 2-layer FR-4 board with a small copper pour, but the exposed pad (when present on WQFN variants) must be soldered to the analog ground plane for thermal relief.
Drive the analog input VIN (pin 1) with a low-impedance, DC-coupled source through a series 50 ohm resistor placed within 5 mm of the pin, terminated at the source end to avoid reflections. The input bandwidth is 50 MHz, so keep input trace length below 10 mm and use a ground guard trace on either side. Anti-alias filtering must band-limit the analog input to less than half the clock frequency to satisfy the Nyquist criterion; a 5th-order Butterworth at 20 MHz is a common choice for video applications.
Avoid driving the analog input above 1 Vp-p or below ground - the on-chip input clamp protects against over-voltage but sustained overdrive can degrade linearity. Tie the OE (output enable, pin 13) to logic low for normal operation; floating this pin puts outputs in high-Z which can cause bus contention on the digital side. Use the power-down (PD, pin 14, active high) to reduce quiescent current to a few mW between conversions in duty-cycled applications, but note that wake-up time is several clock cycles.
コンプライアンス情報
ADC1175-50CIMTX is the legacy non-RoHS variant with SnPb terminal finish. For RoHS-compliant designs use ADC1175-50CIMTX/NOPB which is lead-free and RoHS compliant per TI ordering documentation. AEC-Q100 qualification not applicable - operating temperature range is -20C to +75C, not full automotive -40C to +125C.
