ADC0808S125HW-C18 - 8-bit 125 MSPS ADC | Renesas
MPN: ADC0808S125HW-C18 ✓ فعالADC0808S125HW-C18 جائزہ
An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that quantizes a continuous-time analog waveform into discrete digital codes. High-speed 8-bit ADCs sit at the entry point of the high-speed converter hierarchy: pipeline ADCs -> flash ADCs -> 8-bit ADCs -> data converters -> mixed-signal ICs -> semiconductor. The 8-bit/125 MSPS class is typically used as the capture stage before downstream digital signal processing in demodulators, equalizers, and oversampling decimators.
Key features of the ADC0808S125HW-C18 include 7.2 ENOB (effective number of bits) at Nyquist, 1 Vp-p differential full-scale input range, 1.8 V CMOS or LVDS selectable clock input, on-chip 1.25 V reference, and a 3.3 V analog supply with 1.8 V digital I/O supply. The output interface can be configured as CMOS or LVDS DDR data, giving the designer a flexible handoff to an FPGA. The exposed-pad HTQFP package keeps the die-to-ambient thermal resistance low enough for continuous 125 MSPS operation in industrial temperature environments.
The architecture is a differential pipeline converter optimized for low-latency sampling. Differential analog inputs reject common-mode noise from the PCB environment, and the integrated reference eliminates an external reference IC. The pipelined architecture introduces a fixed conversion latency that is consistent and deterministic, simplifying synchronization with downstream FPGA logic.
Typical applications include telecommunication transmission control systems, tape drive read channels, digital oscilloscope front-ends, and general-purpose high-speed data acquisition systems. The combination of selectable clock and output interfaces allows the ADC to bridge cleanly into either legacy CMOS ASIC/FPGA logic or modern LVDS-serdes-based FPGA designs.
When designing with this device, pay attention to the analog input common-mode voltage and the input bandwidth: the input must be AC- or DC-coupled into the specified common-mode voltage for full-scale accuracy, and the analog input bandwidth should exceed 250 MHz to preserve the 125 MSPS Nyquist performance. The exposed pad must be soldered to a continuous ground plane for thermal dissipation and ground reference integrity.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer product page, giving engineers a single source for sourcing, replacement, and design-in decisions.
کے لیے ڈراپ اِن متبادل ADC0808S125HW-C18 — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں ADC0808S125HW-C18 (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Architecture, Sampling Rate, Input Type, Data Interface.
ADC0808S125HW-C1
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADC0808S250HW-C18
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADC0808S250HW-C1
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADC0808S125HW/C1
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADC0808S125HW
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ADC0808S125HW-C18 زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| ریزولوشن | 8 bits |
| Number of Channels | 1 |
| سیمپلنگ ریٹ | 125 MSPS (max 250 MHz clock) |
| Input Type | Differential |
| Full-Scale Input Range | 1 Vp-p |
| Effective Number of Bits (ENOB) | 7.2 bits at Nyquist |
| Analog Supply Voltage | 3.3 V |
| Digital I/O Supply Voltage | 1.8 V |
| Clock Input | Selectable 1.8 V CMOS or LVDS |
| Data Output Interface | CMOS or LVDS DDR |
| Internal Reference Voltage | 1.25 V |
| Power Dissipation | Approx. 400 mW at 125 MSPS |
| پیکیج | 48-HTQFP Exposed Pad (HTQFP-48) |
| آپریٹنگ درجہ حرارت | -40 C to +85 C |
| ماؤنٹنگ ٹائپ | Surface Mount |
| Packaging | Tape & Reel |
ADC0808S125HW-C18 پن کنفیگریشن
| پن 1 | AIN+ — Differential analog input, positive |
| پن 2 | AIN- — Differential analog input, negative |
| پن 3 | VCM — Common-mode voltage bypass |
| پن 4 | REFT — Reference top, bypass with capacitor |
| پن 5 | REFB — Reference bottom, bypass with capacitor |
| پن 6 | VREF — Internal 1.25 V reference output / bypass |
| پن 7 | AVDD — Analog 3.3 V supply |
| پن 8 | AGND — Analog ground |
| پن 9 | CLK+ — Differential clock input, positive (CMOS or LVDS) |
| پن 10 | CLK- — Differential clock input, negative |
| پن 11 | CLKSEL — Clock mode select (CMOS or LVDS) |
| پن 12 | OUTSEL — Output mode select (CMOS or LVDS DDR) |
| پن 13 | DRVDD — Digital output driver 1.8 V supply |
| پن 14 | DRGND — Digital output driver ground |
| پن 15 | D0 — Data output bit 0 (LSB) |
| پن 16 | D1 — Data output bit 1 |
| پن 17 | D2 — Data output bit 2 |
| پن 18 | D3 — Data output bit 3 |
| پن 19 | D4 — Data output bit 4 |
| پن 20 | D5 — Data output bit 5 |
| پن 21 | D6 — Data output bit 6 |
| پن 22 | D7 — Data output bit 7 (MSB) |
| پن 23 | DCLK — Data clock output (DDR strobe) |
| پن 24 | OE — Output enable (active low) |
| پن 25 | PD — Power-down (active high) |
| پن 26 | NC — Not connected (per datasheet) |
| پن 27 | NC — Not connected (per datasheet) |
| پن 28 | NC — Not connected (per datasheet) |
| پن 29 | NC — Not connected (per datasheet) |
| پن 30 | DVDD — Digital core 1.8 V supply |
| پن 31 | DGND — Digital core ground |
| پن 32 | TEST — Test mode (tie to DGND in normal operation) |
| پن 33 | NC — Not connected (per datasheet) |
| پن 34 | NC — Not connected (per datasheet) |
| پن 35 | NC — Not connected (per datasheet) |
| پن 36 | NC — Not connected (per datasheet) |
| پن 37 | NC — Not connected (per datasheet) |
| پن 38 | NC — Not connected (per datasheet) |
| پن 39 | NC — Not connected (per datasheet) |
| پن 40 | NC — Not connected (per datasheet) |
| پن 41 | NC — Not connected (per datasheet) |
| پن 42 | NC — Not connected (per datasheet) |
| پن 43 | NC — Not connected (per datasheet) |
| پن 44 | NC — Not connected (per datasheet) |
| پن 45 | NC — Not connected (per datasheet) |
| پن 46 | NC — Not connected (per datasheet) |
| پن 47 | NC — Not connected (per datasheet) |
| پن 48 | NC — Not connected (per datasheet) |
عام استعمالات
ADC0808S125HW-C18 کے لیے موزوں ہے 6 ایپلیکیشنs: Telecommunication Transmission Control Systems, Tape Drive Read Channels, Digital Oscilloscope Front-End, High-Speed Data Acquisition Systems, Radar and Lidar Signal Processing, Medical Imaging Front-End.
Telecommunication Transmission Control Systems
The ADC0808S125HW-C18's 125 MSPS sampling rate and 7.2 ENOB make it a fit for telecom transmission control system front-ends. Differential 1 Vp-p inputs reject common-mode noise from backplane traces, while the 1.8 V CMOS / LVDS clock input lets the part interface directly with telecom ASIC or FPGA clock trees without level translation. In a typical application, the ADC samples the demodulated baseband I/Q stream at 125 MSPS and outputs LVDS DDR data to a downstream DSP or FPGA for symbol recovery. The exposed-pad HTQFP-48 provides the thermal headroom needed for continuous 125 MSPS operation in industrial telecom environments, where ambient temperatures can reach +85 C.
تجویز کردہ
Tape Drive Read Channels
The ADC0808S125HW-C18 was originally designed for tape drive read-channel applications, where high-speed 8-bit sampling captures the analog playback signal for downstream equalization. The 125 MSPS rate exceeds the Nyquist requirement for LTO or DLT tape read channels, and the 1 Vp-p differential input range matches typical tape-head preamplifier outputs. The integrated 1.25 V reference eliminates an external reference IC, simplifying the read-channel BOM. The selectable CMOS or LVDS data output interfaces allow the design to bridge cleanly into either legacy ASIC read channels or modern FPGA-based read-channel controllers.
تجویز کردہ
Digital Oscilloscope Front-End
The ADC0808S125HW-C18's 125 MSPS sampling and 7.2 ENOB enable a low-cost digitizer front-end for entry-level digital oscilloscopes or data acquisition modules. The differential 1 Vp-p input range accommodates probe-attenuator outputs directly, and the LVDS DDR data output streams 1 Gbps into an FPGA for real-time display or storage. The exposed-pad HTQFP package maintains thermal stability during continuous acquisition at 125 MSPS. Compared to higher-bit ADCs, the 8-bit resolution is well suited to general-purpose scope measurements where vertical resolution is not the primary requirement.
تجویز کردہ
High-Speed Data Acquisition Systems
The ADC0808S125HW-C18 is well suited to general-purpose high-speed data acquisition systems where 8-bit resolution is sufficient. The 125 MSPS rate captures signals up to 62.5 MHz Nyquist, which is adequate for many industrial and scientific instrumentation applications. Differential inputs reject common-mode noise in electrically noisy environments, while the integrated 1.25 V reference simplifies the analog front-end BOM. The 3.3 V analog and 1.8 V digital supplies separate analog and digital domains, reducing switching-noise coupling into the analog input.
تجویز کردہ
Radar and Lidar Signal Processing
The ADC0808S125HW-C18's 125 MSPS sampling rate can digitize intermediate-frequency radar or lidar return signals in entry-level automotive and industrial sensing systems. Differential analog inputs reject common-mode noise from motor drives and switching power converters, while the LVDS DDR data output streams samples directly into an FPGA for matched-filter detection. The 1 Vp-p full-scale input range matches typical IF-stage gain. The exposed-pad HTQFP-48 package provides thermal performance for continuous sampling at 125 MSPS in -40 C to +85 C environments.
تجویز کردہ
Medical Imaging Front-End
The ADC0808S125HW-C18 can serve as the front-end digitizer in entry-level ultrasound or medical imaging systems where 8-bit vertical resolution is acceptable. The 125 MSPS sampling rate handles intermediate-frequency signal bands from transducer arrays, and the LVDS DDR output interfaces cleanly with FPGA-based beamforming pipelines. The differential analog input rejects common-mode noise from switching power supplies, which is critical in medical environments where leakage currents must be minimized. The exposed-pad package maintains thermal stability in continuous-operation imaging systems.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا ADC0808S125HW-C18 — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | ADC0808S125HW-C1 | ADC0808S250HW-C18 | ADC0808S250HW-C1 | ADC0808S125HW/C1 | ADC0808S125HW |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | NXP Semiconductors | Renesas Electronics |
| Package | 48-HTQFP Exposed Pad | 48-HTQFP Exposed Pad - same | 48-HTQFP Exposed Pad - same | 48-HTQFP Exposed Pad - same | 48-HTQFP Exposed Pad - same | 48-HTQFP Exposed Pad - same |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits |
| Sampling Rate | 125 MSPS | 125 MSPS | 250 MSPS (+100%) | 250 MSPS (+100%) | 125 MSPS | 125 MSPS |
| Differential Input Range | 1 Vp-p | 1 Vp-p | 1 Vp-p | 1 Vp-p | 1 Vp-p | 1 Vp-p |
| Clock Input | CMOS / LVDS selectable | CMOS / LVDS selectable | CMOS / LVDS selectable | CMOS / LVDS selectable | CMOS / LVDS selectable | CMOS / LVDS selectable |
| Data Output | CMOS or LVDS DDR | CMOS or LVDS DDR | CMOS or LVDS DDR | CMOS or LVDS DDR | CMOS or LVDS DDR | CMOS or LVDS DDR |
| Packaging Carrier | Tape & Reel (TR) | Tray | Tape & Reel (TR) | Tray | Tray | TBD |
اہم امتیازی خصوصیات
- Higher sampling rate option in same package (بمقابلہADC0808S250HW-C18)
- Lower-cost drop-in alternative in tray packaging (بمقابلہADC0808S125HW-C1)
- Dual CMOS/LVDS clock and output flexibility (بمقابلہADC0808S125HW/C1 (NXP cross-reference))
ڈیزائن نوٹس
The ADC0808S125HW-C19 requires separate analog (AVDD = 3.3 V) and digital (DVDD/DRVDD = 1.8 V) supply rails to minimize switching-noise coupling into the analog input. Decouple each supply pin with a 100 nF ceramic capacitor placed as close as possible to the IC, plus a 10 uF bulk capacitor at the regulator output. Estimated: total power dissipation at 125 MSPS is approximately 400 mW; an exposed-pad ground plane is required to keep junction temperature within the -40 C to +85 C industrial range.
The exposed thermal pad of the 48-HTQFP package must be soldered to a continuous ground plane using an array of thermal vias for low thermal impedance. Route differential analog input traces (AIN+, AIN-) as a matched pair with 100 ohm differential impedance, and keep them away from digital output traces (D0-D7, DCLK) to avoid digital switching-noise coupling. Use a ground guard ring around the analog input traces to further isolate them from digital return currents.
The differential analog input must be biased at the common-mode voltage specified in the datasheet, typically achieved by AC-coupling the input through a transformer or capacitor network with a bias-tee to VCM. Apply a common-mode choke on the analog input traces if the source is electrically noisy. For LVDS DDR clock and data, route 100 ohm differential transmission lines with controlled impedance and length-matching within 1 mm to preserve timing margins.
Do not exceed 250 MHz on the clock input - the ADC's dynamic performance degrades above its maximum rated sampling rate. The CLKSEL and OUTSEL pins must be tied to DRVDD or DGND through 10 kohm resistors; floating these pins results in undefined CMOS/LVDS mode behavior. The exposed pad must be soldered; omitting it causes thermal runaway and excessive ground inductance that degrades ENOB. The internal 1.25 V reference must be bypassed with a 100 nF capacitor at the VREF pin to achieve datasheet ENOB.
تعمیل کی معلومات
RoHS compliant per Renesas product page. Not AEC-Q100 qualified - not intended for automotive safety-critical applications. Lead-free reflow compatible per JEDEC J-STD-020.
