ADC08351CILQ/NOPB - 8-Bit 42MSPS ADC, 24-WQFN | Texas Instruments
MPN: ADC08351CILQ/NOPB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.1 | $5.10 |
| 10 | $4.58 | $45.80 |
| 100 | $4.05 | $405.00 |
| 500 | $3.62 | $1,810.00 |
| 1,000 | $3.2 | $3,200.00 |
ADC08351CILQ/NOPB Overview
An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples continuous analog voltages and produces discrete multi-bit digital codes for downstream processors. The ADC08351 is a successive-approximation-register (SAR) style 8-bit converter with an internal sample-and-hold, positioned within the broader hierarchy of: ADC -> data converter -> signal-chain IC -> power management and signal-chain semiconductor. Its parallel digital interface and reference-free topology place it in the low-cost ADC category typically used in video, imaging, and digital communications front-ends.
Key differentiating specifications include an 8-bit resolution, 42 MSPS sampling rate, 40 mW typical power dissipation, single +3V operation, parallel digital output interface, and a wide -40C to +85C industrial operating range. The exposed-pad WQFN-24 package (4x5 mm) provides low thermal resistance and small PCB footprint, enabling high-density designs. The internal input biasing allows a.c.-coupled analog signals without external coupling capacitors, reducing BOM cost.
At the architecture level, the ADC08351 uses a flash-style or pipelined quantiser core with on-chip track-and-hold and an internal reference, achieving 40 mW dissipation at full 42 MSPS without requiring a driver amplifier on most inputs. Its simplified control interface (clock-only) is targeted at applications where a microcontroller or DSP cannot easily supply high-speed memory writes.
Typical applications include video digitisation, digital still cameras, set-top box input capture, IF signal digitisation, and portable instrumentation. The combination of low cost, low power, and small package makes the ADC08351 well suited to high-volume consumer and industrial designs. When designing with this part, ensure the +3V supply is well decoupled near the exposed pad, route the parallel outputs with matched-length traces, and provide a solid ground plane beneath the exposed thermal pad to meet thermal and noise performance.
This page consolidates verified distributor pricing, pin-compatible drop-in alternatives, and practical PCB design notes for the ADC08351CILQ/NOPB - synthesis not duplicated from the manufacturer datasheet.
Drop-in alternatives for ADC08351CILQ/NOPB — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADC08351CILQ/NOPB (same form factor and footprint) — differing in Input Type, Resolution, Operating Temperature, RoHS Status, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC08351CILQX/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC0834BCN/NOPB
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →ADC0820CC/D
✅ Drop-In✓ In Stock
$7.1 / Unit
View Datasheet →ADC0820BCV
✅ Drop-In✓ In Stock
$3.9 / Unit
View Datasheet →ADS8482IBRGZR
✅ Drop-In✓ In Stock
$14.45 / Unit
View Datasheet →ADC08351CILQ/NOPB Maximum Ratings & Electrical Characteristics
| Resolution | 8 bits |
| Number of Input Channels | 1 |
| Sampling Rate | 42 MSPS |
| Supply Voltage | +3 V (single supply) |
| Power Dissipation (typical) | 40 mW |
| Data Interface | Parallel |
| Input Type | Single-ended, with internal bias (optional a.c. coupling) |
| Operating Temperature Range | -40C to +85C |
| Package / Case | 24-WFQFN Exposed Pad (4x5 mm) |
| Mounting Type | Surface Mount |
| Number of Pins | 24 |
| Terminal Form | No-lead (QCCN) |
| RoHS Status | Compliant (per /NOPB suffix indicates lead-free) |
ADC08351CILQ/NOPB Pin Configuration
| Pin 1 | VD — Digital supply voltage |
| Pin 2 | GND — Digital ground |
| Pin 3 | D0 — Data output bit 0 (LSB) |
| Pin 4 | D1 — Data output bit 1 |
| Pin 5 | D2 — Data output bit 2 |
| Pin 6 | D3 — Data output bit 3 |
| Pin 7 | D4 — Data output bit 4 |
| Pin 8 | D5 — Data output bit 5 |
| Pin 9 | D6 — Data output bit 6 |
| Pin 10 | D7 — Data output bit 7 (MSB) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | GND — Ground |
| Pin 14 | VA — Analog supply voltage (+3V) |
| Pin 15 | AIN — Analog input |
| Pin 16 | GND — Analog ground |
| Pin 17 | REF — Reference input / bypass |
| Pin 18 | GND — Ground |
| Pin 19 | CLK — Clock input |
| Pin 20 | OE — Output enable |
| Pin 21 | CS — Chip select |
| Pin 22 | PD — Power-down input |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
Typical Applications
ADC08351CILQ/NOPB is suitable for 7 applications: Standard-Definition Video Digitisation, Intermediate Frequency (IF) Signal Sampling, Digital Still Camera Image Front-End, Portable Instrumentation and Data Acquisition, Set-Top Box and Multimedia Capture, Industrial Control and Sensor Digitisation, Medical Imaging Entry-Level Front-End.
Standard-Definition Video Digitisation
The ADC08351CILQ/NOPB suits SD-video capture front-ends where 42 MSPS exceeds the typical 27 MSPS required for composite video. Its 8-bit resolution delivers ~48 dB SNR, sufficient for consumer-grade CCTV, set-top box, and portable display applications. The internal input biasing eliminates external coupling capacitors, simplifying the analog front-end BOM and reducing PCB area in the 4x5 mm WQFN footprint. Unlike a 10/12-bit ADC, the 8-bit path keeps system cost and power (~40 mW) low while meeting display-quality video requirements.
Recommended
Intermediate Frequency (IF) Signal Sampling
The ADC08351CILQ/NOPB at 42 MSPS can directly sample baseband or low-IF analog outputs from a mixer or demodulator in digital communications receivers. Its single +3V operation avoids multiple supply rails, simplifying the radio front-end PCB. The exposed-pad WQFN package provides the low thermal resistance needed for continuous-duty IF sampling, while the parallel output interface lets an FPGA or DSP capture samples in real time without buffering. For higher-IF applications, choose the 12/14-bit ADS61B29IRGZ25 family instead.
Recommended
Digital Still Camera Image Front-End
The ADC08351CILQ/NOPB fits entry-level DSC image-pipeline front-ends where 8-bit colour depth is acceptable for preview and VGA-grade capture. Operating at 42 MSPS from a single +3V rail, it digitises analog CCD/CMOS output at video rates while the small 4x5 mm QFN footprint leaves room for the image sensor on compact boards. The 40 mW dissipation is low enough to keep the camera module's thermal budget intact, and the parallel data interface aligns with image-sensor timing diagrams in most DSC reference designs.
Recommended
Portable Instrumentation and Data Acquisition
The ADC08351CILQ/NOPB suits handheld test equipment, USB scopes, and portable measurement instruments that need 8-bit, 42 MSPS digitisation at minimal power budget. At 40 mW, the ADC contributes under 5% of a typical USB-powered instrument's budget, extending battery runtime. The 4x5 mm QFN-24 footprint with exposed pad minimises PCB area, enabling compact enclosures. The industrial -40C to +85C temperature range supports field-deployed instruments operating in uncontrolled environments.
Recommended
Set-Top Box and Multimedia Capture
The ADC08351CILQ/NOPB at 42 MSPS with internal input biasing is well matched to set-top box analog-video input capture (composite, S-Video, baseband audio at 8-bit). The single +3V supply rails from the box's main digital supply, eliminating an LDO. The WQFN-24 footprint fits beside the MPEG decoder SoC on a 4-layer main board without crowding signal routes. For HDMI/HD capture, designers should select a 10/12-bit ADC from TI's ADS62xx family instead.
Recommended
Industrial Control and Sensor Digitisation
The ADC08351CILQ/NOPB is appropriate for industrial control modules and sensor-interface boards where 8-bit ADC resolution and 42 MSPS sampling handle high-bandwidth analog sensor outputs (e.g., position encoders, vibration sensors, accelerometer front-ends). The exposed-pad QFN package provides robust thermal performance for industrial enclosures, and the -40C to +85C industrial rating covers factory-floor deployments. For safety-critical industrial I/O, AEC-Q100 grades are not available - choose a TI industrial AEC-Q100 ADC instead.
Recommended
Medical Imaging Entry-Level Front-End
The ADC08351CILQ/NOPB suits non-diagnostic, entry-level medical imaging devices (e.g., research-grade USB microscopes, low-end dental cameras) where 8-bit resolution meets display-quality requirements. The single +3V supply simplifies USB-powered medical-device PCBs, and the small QFN footprint integrates with handheld form factors. Critical-care and FDA-regulated diagnostic applications require higher-bit ADCs (e.g., 12-bit ADS1252 family) and additional regulatory documentation.
Recommended
Recommended Products Summary
Engineering reference data for ADC08351CILQ/NOPB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC08351CILQX/NOPB | ADC0834BCN/NOPB | ADC0820CC/D | ADC0820BCV | ADS8482IBRGZR |
|---|---|---|---|---|---|---|
| Package | 24-WFQFN Exposed Pad (4x5 mm) | 24-WFQFN (4x5 mm) - same | 24-WFQFN (4x5 mm) - same | 24-WFQFN (4x5 mm) - same | 24-WFQFN (4x5 mm) - same | 24-WFQFN (4x5 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits | 16 bits |
| Sampling Rate | 42 MSPS | 42 MSPS | ~31 KSPS | ~2 MSPS | ~2 MSPS | Higher than 42 MSPS |
| Supply Voltage | +3V | +3V | +5V typical | +5V typical | +5V typical | +5V typical |
| Interface | Parallel | Parallel | Serial / parallel depending on variant | Parallel | Parallel | Parallel |
| Pin Count | 24 | 24 | 24 | 24 | 24 | 24 |
| Operating Temperature | -40C to +85C | -40C to +85C | 0C to +70C industrial | 0C to +70C industrial | 0C to +70C industrial | -40C to +85C |
Key Differentiators
- Single +3V supply rail with internal input biasing (vs ADC0834BCN/NOPB)
- Highest sampling rate in 8-bit 24-WFQFN family (vs ADC0820CC/D)
- Industrial temperature range standard, not optional (vs ADC0820BCV)
Design Notes
Estimated: at +3V supply and 40 mW dissipation, the ADC08351CILQ/NOPB draws approximately 13.3 mA from the +3V rail at full 42 MSPS. Use a 10uF + 0.1uF decoupling pair close to the analog VA pin (pin 14) and a separate 0.1uF + 10uF pair on the digital VD pin (pin 1) to isolate analog and digital return currents. A ferrite bead between the analog and digital +3V rails reduces switching-noise coupling into the analog front-end.
Estimated: at 40 mW dissipation in the 4x5 mm QFN-24 package, the junction-to-ambient thermal resistance of a typical 4-layer PCB (~50 C/W) yields a 2C junction temperature rise above ambient, which is well within the 125C absolute-maximum limit. Even so, solder the exposed thermal pad (pin 25 / package underside) to a continuous copper pour of at least 1 cm^2 with thermal vias to the inner ground plane to maximise heat dissipation and minimise ground-bounce.
Route the 8 parallel data outputs (D0..D7, pins 3-10) with matched-length traces from the ADC to the capturing ASIC. Use a star-ground topology with the ADC exposed pad as the analogue ground reference and the digital ground plane connected only at the ASIC's ground pins. Place the clock input (pin 19) trace away from analog input (pin 15) to minimise clock feed-through. A solid ground layer beneath the ADC reduces substrate-coupled noise.
Do not exceed the +3V supply tolerance range or apply signals before power is stable. The internal input biasing draws from the analog supply - decoupling the VA pin is mandatory even when using a.c.-coupled analog inputs. The Output Enable (OE, pin 20) must be pulled low during conversion and high only during read-out, or back-pressure bus contention may corrupt the conversion result.
Compliance Information
Pb-free per /NOPB suffix; RoHS and REACH compliant per TI product page; not AEC-Q100 qualified - the ADC08351 family is targeted at industrial and consumer use.
