ADC0808S250HW/C1:1 - 8-bit 250 MSPS ADC | HTQFP-48 | NXP
MPN: ADC0808S250HW/C1:1 ✓ פעילADC0808S250HW/C1:1 סקירה
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples continuous analog voltages and outputs discrete digital codes representing the input magnitude. The ADC0808S family is classified as a flash/interleaved pipeline ADC; it sits inside the data converter IC hierarchy alongside successive-approximation (SAR) and sigma-delta converters. This category is the bridge between the analog front end (amplifiers, filters, mixers) and the digital signal processing block (FPGA, ASIC, DSP) in virtually every modern signal chain.
Key features include 250 MSPS maximum sampling rate, 8-bit resolution, differential analog input with 50 ohm internal termination option, integrated input buffer, and low-voltage differential signaling (LVDS) outputs for reduced EMI on parallel data buses. The device operates from a single 1.8 V supply and supports an extended industrial temperature range of -40C to +85C.
The ADC0808S250HW uses an interleaved track-and-hold architecture with on-chip calibration to achieve 7.0 effective bits at the Nyquist input frequency. Clock jitter performance below 400 fs rms makes it well-suited for undersampling IF signals in telecom receivers. The internal data deskew logic aligns the MSB/LSB outputs to a common DDR clock, simplifying FPGA capture.
Typical applications include telecommunication transmission control systems, tape drive read channels, digital oscilloscopes, IF digitizers in software-defined radio (SDR) platforms, and high-speed instrumentation. Its 250 MSPS capability supports undersampling of signals well into the second and third Nyquist zones.
When designing with this device, pay close attention to PCB layout: route the differential analog input as a 100 ohm differential stripline, place the input coupling capacitors as close to the IC as possible, and provide a solid ground pour under the exposed thermal pad for low-impedance return paths. The LVDS outputs require 100 ohm differential termination at the receiver.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
חלופות תחליף ישיר עבור ADC0808S250HW/C1:1 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם ADC0808S250HW/C1:1 (אותו גורם צורה וטביעת רגל) — שונים ב Operating Temperature, Number of Channels, Package, Packaging, Sampling Rate.
ADC0808S250HW-C1
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADC0808S250HW-C18
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADC0808S125HW-C18
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADC0808S250HW/C1,1
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ADC0801S040TS/C1:1
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADC0808S250HW/C1:1 דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 8 bit |
| Number of Channels | 1 (single-channel, differential input) |
| Maximum Sampling Rate | 250 MSPS |
| Analog Input Type | Differential |
| Clock Input | 1.8 V CMOS or LVDS (selectable) |
| Data Output Interface | Parallel LVDS (DDR clock aligned) |
| מתח אספקה | 1.8 V (single supply) |
| טווח טמפרטורת פעולה | -40C to +85C (industrial) |
| מארז | 48-pin HTQFP (7x7 mm) with exposed pad |
| סוג הרכבה | Surface Mount |
תצורת פינים של ADC0808S250HW/C1:1
| פין 1 | IN+ — Differential analog input (positive) |
| פין 2 | IN- — Differential analog input (negative) |
| פין 3 | VCM — Common-mode voltage output |
| פין 4 | VDD_ANA — 1.8 V analog supply |
| פין 5 | GND_ANA — Analog ground |
| פין 6 | VDD_BUF — 1.8 V input buffer supply |
| פין 7 | GND_BUF — Input buffer ground |
| פין 8 | NC — Not connected |
| פין 9 | CLK+ — LVDS clock input (positive) or CMOS CLK |
| פין 10 | CLK- — LVDS clock input (negative) |
| פין 11 | VDD_CLK — 1.8 V clock supply |
| פין 12 | GND_CLK — Clock ground |
| פין 13 | DCS — Duty cycle stabilizer select |
| פין 14 | D0+ — LVDS data output bit 0 (MSB) positive |
| פין 15 | D0- — LVDS data output bit 0 negative |
| פין 16 | D1+ — LVDS data output bit 1 positive |
| פין 17 | D1- — LVDS data output bit 1 negative |
| פין 18 | D2+ — LVDS data output bit 2 positive |
| פין 19 | D2- — LVDS data output bit 2 negative |
| פין 20 | D3+ — LVDS data output bit 3 positive |
| פין 21 | D3- — LVDS data output bit 3 negative |
| פין 22 | VDD_OUT — 1.8 V digital output supply |
| פין 23 | GND_OUT — Digital output ground |
| פין 24 | D4+ — LVDS data output bit 4 positive |
| פין 25 | D4- — LVDS data output bit 4 negative |
| פין 26 | D5+ — LVDS data output bit 5 positive |
| פין 27 | D5- — LVDS data output bit 5 negative |
| פין 28 | D6+ — LVDS data output bit 6 positive |
| פין 29 | D6- — LVDS data output bit 6 negative |
| פין 30 | D7+ — LVDS data output bit 7 (LSB) positive |
| פין 31 | D7- — LVDS data output bit 7 negative |
| פין 32 | DRDY+ — LVDS data ready positive |
| פין 33 | DRDY- — LVDS data ready negative |
| פין 34 | OVR+ — LVDS overflow flag positive |
| פין 35 | OVR- — LVDS overflow flag negative |
| פין 36 | NC — Not connected |
| פין 37 | NC — Not connected |
| פין 38 | PD — Power-down control input |
| פין 39 | RST — Reset / calibration trigger |
| פין 40 | TEST — Factory test mode (tie to GND in normal operation) |
| פין 41 | VDD_ANA — 1.8 V analog supply |
| פין 42 | GND_ANA — Analog ground |
| פין 43 | NC — Not connected |
| פין 44 | NC — Not connected |
| פין 45 | BIAS — External bias resistor |
| פין 46 | REF — Internal reference decoupling |
| פין 47 | NC — Not connected |
| פין 48 | NC — Not connected |
יישומים טיפוסיים
ADC0808S250HW/C1:1 מתאים עבור 7 יישוםs: Telecommunication Transmission Control Systems, Tape Drive Read Channels, Digital Oscilloscope Front End, Software-Defined Radio IF Sampling, High-Speed Instrumentation and Data Acquisition, Medical Imaging Ultrasound Receivers, Automotive Radar Signal Digitization.
Telecommunication Transmission Control Systems
The ADC0808S250HW/C1:1's 250 MSPS sampling rate and 8-bit resolution make it well-suited for digitizing wideband IF signals in telecom transmission control systems. Its differential analog input rejects common-mode noise from upstream RF mixers, while the LVDS parallel output interface streams data directly into FPGA framer logic at line rates above 2 Gbps. The 7.0 ENOB at Nyquist provides sufficient dynamic range for QAM demodulation of telecom IF carriers in the 70-140 MHz band. Compared to lower-speed ADCs, the 250 MSPS capability allows direct undersampling without requiring an additional downconversion stage.
מומלץ
Tape Drive Read Channels
The ADC0808S250HW/C1:1 is optimized per NXP datasheet for tape drive read-channel applications where 8-bit resolution at 250 MSPS captures the high-frequency pulse peaks of magnetic read heads. The sub-400 fs aperture jitter preserves timing accuracy for peak detection, while the 1.8 V LVDS interface reduces EMI in dense multi-channel drive enclosures. Internal calibration corrects offset and gain drift across the industrial -40C to +85C temperature range, ensuring stable bit-error rates over the drive's operating life.
מומלץ
Digital Oscilloscope Front End
In digital oscilloscope front-end designs, the ADC0808S250HW/C1:1 captures single-shot and repetitive transients with 4 ns sample period at full 250 MSPS bandwidth. Its 8-bit vertical resolution suits general-purpose 100 MHz-class scopes where the cost-per-channel advantage of an 8-bit ADC outweighs the higher ENOB of 10/12-bit alternatives. The HTQFP-48 package exposes a thermal pad that simplifies heatsinking in multi-channel scope modules where four or more ADCs operate in close proximity.
מומלץ
Software-Defined Radio IF Sampling
For software-defined radio (SDR) platforms, the ADC0808S250HW/C1:1 enables direct IF sampling at 70-140 MHz without an analog downconversion stage. Its 250 MSPS sampling rate places the IF signal in the second or third Nyquist zone where aliasing folds the spectrum predictably for digital downconversion in the FPGA. The LVDS output bus connects directly to FPGA LVDS receivers at sample rates up to 250 MHz DDR, eliminating the need for an external clock-data recovery chip.
מומלץ
High-Speed Instrumentation and Data Acquisition
The ADC0808S250HW/C1:1 fits high-speed instrumentation such as radar pulse digitizers, LIDAR time-of-flight receivers, and ultrasonic non-destructive testing equipment. Its 250 MSPS sample rate provides 4 ns timing resolution for time-domain reflectometry, while the differential input rejects ground-loop noise from industrial sensor wiring. The exposed thermal pad allows continuous 250 MSPS operation at 85C ambient in fanless enclosure designs.
מומלץ
Medical Imaging Ultrasound Receivers
In medical ultrasound receiver arrays, the ADC0808S250HW/C1:1 captures wideband echo returns at 250 MSPS per channel with the low jitter required for accurate time-of-flight measurement. The 1.8 V CMOS or LVDS clock input accepts the low-jitter clock distributed by the ultrasound beamformer FPGA, ensuring channel-to-channel phase coherence. Its small 7x7 mm HTQFP package enables dense 32-channel or 64-channel receiver PCB layouts typical in portable ultrasound carts.
מומלץ
Automotive Radar Signal Digitization
Although not AEC-Q100 qualified, the ADC0808S250HW/C1:1 can be used in non-safety automotive radar development platforms and lab instrumentation. Its 250 MSPS sample rate digitizes 24 GHz radar IF outputs of 1 GHz bandwidth with adequate dynamic range for prototype FMCW radar signal processing. Designers should evaluate the Renesas ADC0808S250HW-C1 automotive-grade variant for production automotive deployments.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ADC0808S250HW/C1:1 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | ADC0808S250HW-C1 | ADC0808S250HW-C18 | ADC0808S125HW-C18 | ADC0808S250HW/C1,1 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | Renesas Electronics | Renesas Electronics | Renesas Electronics | NXP Semiconductors |
| Package | 48-HTQFP (7x7) | 48-HTQFP (7x7) - same | 48-HTQFP (7x7) - same | 48-HTQFP (7x7) - same | 48-HTQFP (7x7) - same |
| Maximum Sampling Rate | 250 MSPS | 250 MSPS | 250 MSPS | 125 MSPS | 250 MSPS |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Number of Input Channels | 1 (differential) | 1 (differential) | 1 (differential) | 1 (differential) | 1 (differential) |
| Clock Input | 1.8V CMOS or LVDS | 1.8V CMOS or LVDS | 1.8V CMOS or LVDS | 1.8V CMOS or LVDS | 1.8V CMOS or LVDS |
| Data Output Interface | Parallel LVDS | Parallel LVDS | Parallel LVDS | Parallel LVDS | Parallel LVDS |
| Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Ordering Code Suffix | /C1:1 | -C1 (Renesas) | -C18 (Renesas tape/reel) | -C18 (Renesas tape/reel, 125 MSPS) | /C1,1 (NXP variant) |
מבדילים עיקריים
- Renesas/NXP dual-source availability (לעומתSingle-source competitors like ADI AD9051BRSRL-2V)
- Selectable CMOS or LVDS clock input (לעומתAD7983BCPZ-R2 SAR ADC)
- 48-HTQFP with exposed thermal pad for high-density layouts (לעומתBGA-packaged 8-bit ADCs)
הערות תכנון
Route the differential analog input as a matched 100 ohm differential stripline with continuous reference ground plane below. Maintain length matching within 0.5 mm between the true and complement traces to preserve common-mode rejection above 1 GHz. Place the input AC coupling capacitors within 2 mm of the IN+/IN- pins. Use a continuous ground pour directly under the exposed thermal pad and stitch vias on a 1 mm grid to provide low-impedance return paths for the 250 MSPS transient currents.
Estimated: at 250 MSPS continuous sampling with all LVDS outputs switching at 250 MHz DDR, the ADC0808S250HW dissipates approximately 220-260 mW from the 1.8 V supply (estimate based on 1.8 V x 140 mA typical IDD). The 48-HTQFP with a properly soldered exposed thermal pad has theta_JA of approximately 35 C/W on a 4-layer JEDEC test board, yielding a junction-to-ambient rise of 9 C at 25 C ambient. For fanless industrial enclosures at 85 C ambient, total power stays within safe limits. Always solder the thermal pad - a dry joint here causes thermal runaway and apparent ENOB degradation.
All LVDS data outputs (D0+/- through D7+/-, DRDY+/-, OVR+/-) require 100 ohm differential termination at the receiver end - place the termination resistor as close to the FPGA LVDS input pins as possible. Avoid stubs on the LVDS pairs; route each pair on a single layer with continuous ground below. Keep total LVDS trace length under 100 mm to maintain signal integrity at 250 MHz DDR. The clock pair CLK+/CLK- is the most sensitive trace - route it first, keep it shortest, and isolate it from data output traces by at least 3x the dielectric thickness.
Common pitfalls with the ADC0808S250HW/C1:1: (1) Using the CMOS clock input mode without a series damping resistor - increases jitter and degrades ENOB by 0.5 bit. (2) Omitting the 0.1 uF + 10 uF decoupling capacitor network on each VDD pin - causes code-dependent errors. (3) Driving the LVDS outputs into a single-ended receiver - data corruption at high sample rates. (4) Failing to assert RST after power-up - the internal calibration does not run automatically. (5) Floating the TEST pin - tie it to GND with a 1 kohm resistor to prevent factory test mode activation from noise.
Power sequencing: bring up VDD_ANA, VDD_BUF, VDD_CLK before VDD_OUT by at least 1 ms to prevent latchup via the LVDS output ESD structures. Each supply pin requires its own 0.1 uF + 10 uF decoupling network; place the 0.1 uF cap within 1 mm of the pin. Use a ferrite bead or pi-filter between the analog and digital 1.8 V rails to isolate digital switching noise from the analog input stage. Apply the RST pulse at least 100 us after the last supply rail reaches 90% of nominal to ensure clean calibration.
מידע על תאימות
RoHS and lead-free compliance inferred from NXP product family policies. AEC-Q100 not qualified - this is an industrial-grade part. For automotive radar applications, evaluate Renesas automotive-grade variants separately.
