THS1031IDWR - 10-Bit 30 MSPS ADC w/ Clamp & Gain | Texas Instruments
MPN: THS1031IDWR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.9 | $8.90 |
| 10 | $7.83 | $78.30 |
| 100 | $6.95 | $695.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.55 | $5,550.00 |
THS1031IDWR Overview
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples a continuous-time analog voltage and converts it into a discrete digital code proportional to the input level. Within the broader taxonomy, the THS1031 sits at: ADC -> data converter -> data acquisition IC -> mixed-signal IC -> semiconductor. Its 30 MSPS speed class and 10-bit resolution position it for video, IF-sampling, and general-purpose embedded data acquisition rather than precision instrumentation.
Key features include 10-bit resolution with no missing codes, 30 MSPS guaranteed conversion rate, single 3 V to 5.5 V supply, integrated digital clamp with programmable clamp level, on-chip reference, low differential nonlinearity, single-ended or differential input modes, an out-of-range flag for input diagnostics, and a powerdown pin for low quiescent current between acquisitions. The DW (SOIC-28) wide-body package provides good thermal performance and easy hand-solderability for prototypes.
Architecturally, the THS1031 uses a pipelined multi-stage converter core optimized for low power dissipation at video rates, with internal reference buffering and a sample-and-hold that allows direct coupling to AC- or DC-coupled front-ends. The configurable input section lets designers trade off common-mode rejection, gain, and clamping without an external signal-conditioning chain. According to the TI datasheet, the digital clamp eliminates the need for an external coupling capacitor in many video-style applications.
Typical applications include digital video recording, set-top box and digital still camera imaging pipelines, IF-sampling communications receivers, CCD scanner digitizers, portable battery-powered measurement, and industrial machine-vision preprocessing. For these uses, the integrated clamp reduces external BOM, while 30 MSPS throughput meets standard-definition video and many IF baseband sampling requirements.
When designing with this part, prefer a solid ground plane beneath the device and place the 0.1 µF supply decoupling capacitor as close as possible to the AVDD pin to preserve the SNR at the converter input. The programmable clamp level should be set such that the expected DC offset of the incoming signal falls within the clamp window, otherwise AGC-driven signals will saturate the input stage.
This page synthesizes distributor pricing from DigiKey and Mouser, same-package drop-in alternatives, and practical design notes that supplement - but do not replace - the manufacturer datasheet for the THS1031 family.
Drop-in alternatives for THS1031IDWR — 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 THS1031IDWR (same form factor and footprint) — differing in Architecture, Package, RoHS Status, Number of Channels, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
THS1031IDW
✅ Drop-In📋 Reference alternative (not in catalog)
THS1031IDWRG4
✅ Drop-In📋 Reference alternative (not in catalog)
ADS830E/2K5
✅ Drop-In📋 Reference alternative (not in catalog)
AD9200JRSZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD9200ARSZ
✅ Drop-In📋 Reference alternative (not in catalog)
THS1031IDWR Maximum Ratings & Electrical Characteristics
| Resolution | 10 bits |
| Sample Rate | 30 MSPS |
| Number of Channels | 1 |
| Supply Voltage | 3 V to 5.5 V |
| Architecture | Pipelined CMOS |
| Input Configuration | Single-ended or differential |
| Digital Clamp | Programmable digital clamp amplifier |
| Reference | Internal |
| Out-of-Range Indicator | Yes |
| Powerdown Mode | Yes (hardware pin) |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | SOIC-28 (DW) wide-body, 7.50 mm |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Conversion Type | Successive-approximation-equivalent pipeline |
THS1031IDWR Pin Configuration
| Pin 1 | AVDD — Analog supply voltage (3 V to 5.5 V) |
| Pin 2 | AIN — Analog input (single-ended or positive differential) |
| Pin 3 | AINB — Analog input bar (differential mode) |
| Pin 4 | VREF — Reference voltage bypass |
| Pin 5 | AGND — Analog ground |
| Pin 6 | CLAMP — Programmable digital clamp input |
| Pin 7 | CLK — Clock input |
| Pin 8 | PD — Hardware powerdown (active high) |
| Pin 9 | OTR — Out-of-range indicator output |
| Pin 10 | DVDD — Digital supply voltage |
| Pin 11 | DGND — Digital ground |
| Pin 12 | D9 — Data output bit 9 (MSB) |
| Pin 13 | D8 — Data output bit 8 |
| Pin 14 | D7 — Data output bit 7 |
| Pin 15 | D6 — Data output bit 6 |
| Pin 16 | D5 — Data output bit 5 |
| Pin 17 | D4 — Data output bit 4 |
| Pin 18 | D3 — Data output bit 3 |
| Pin 19 | D2 — Data output bit 2 |
| Pin 20 | D1 — Data output bit 1 |
| Pin 21 | D0 — Data output bit 0 (LSB) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | NC — Not connected (per datasheet) |
| Pin 27 | NC — Not connected (per datasheet) |
| Pin 28 | NC — Not connected (per datasheet) |
Typical Applications
THS1031IDWR is suitable for 6 applications: Standard-Definition Video Digitizer, IF-Sampling Communication Receiver, Digital Still Camera Imaging Pipeline, CCD Scanner / Document Digitizer, Portable Battery-Powered Measurement, Industrial Machine Vision Preprocessing.
Standard-Definition Video Digitizer
The THS1031IDWR's 30 MSPS sample rate and 10-bit resolution make it a strong fit for digitizing standard-definition video streams such as NTSC/PAL composite or component inputs. The 10-bit depth provides the 8-bit broadcast headroom plus 2-bit dither tolerance, while 30 MSPS exceeds the ~27 MSPS requirement for 4:2:2 sampled SDI streams. The integrated programmable digital clamp eliminates the need for an external clamping capacitor on the video input, reducing BOM and board area. Place the device on a dedicated analog ground island with a 0.1 µF + 10 µF decoupling network on AVDD, and use a FIFO-buffered FPGA downstream to capture the 10-bit parallel output at full rate.
Recommended
IF-Sampling Communication Receiver
For intermediate-frequency (IF) sampling in digital receivers operating up to ~15 MHz IF, the THS1031IDWR offers the right speed/cost trade-off. The single-ended or differential input mode lets designers couple the IF signal either directly from a SAW filter or through a balun, and the 3 V to 5.5 V supply range supports both 3.3 V and 5 V IF designs. The out-of-range indicator flags overdrive conditions before ADC saturation, useful for AGC loop control. With 30 MSPS throughput, signals in the 1-15 MHz band can be Nyquist-sampled with margin, allowing digital demodulation (AM/FM/QPSK) downstream on a small microcontroller or DSP.
Recommended
Digital Still Camera Imaging Pipeline
Inside a digital still camera (DSC) or camcorder sub-board, the THS1031IDWR digitizes the analog output of the CCD or CMOS image sensor at rates up to 30 MSPS. The integrated digital clamp holds the CCD's dark-reference level to the lower portion of the ADC range, while 10-bit resolution provides 1024 levels - sufficient for consumer-grade color reconstruction after demosaicing. The hardware powerdown pin allows the ADC to be switched off between video frames in still-image mode, extending battery life. Designers should place the ADC on its own quiet ground and route parallel output traces with matched impedance to the downstream image-signal processor (ISP).
Recommended
CCD Scanner / Document Digitizer
In a desktop document scanner or industrial line-scan camera, the THS1031IDWR digitizes the pixel-rate analog stream from a linear CCD sensor. The 30 MSPS throughput supports color line-scan rates up to ~10 MPixels/s per channel in tri-linear sensors, while the single 3.3 V or 5 V supply simplifies the power tree in a compact scanner housing. The integrated programmable digital clamp eliminates the need for external AC-coupling of the CCD output, reducing BOM cost by ~$0.50 per channel. The powerdown pin allows the ADC to enter standby between scan lines, cutting quiescent current for thermally constrained scanner designs.
Recommended
Portable Battery-Powered Measurement
Handheld test, data-logger, and field-measurement devices benefit from the THS1031IDWR's low-power CMOS design and 3 V to 5.5 V supply flexibility directly off a Li-ion or four-AA battery stack. The hardware powerdown pin drops quiescent current to a few microamps between acquisitions, extending battery life in intermittent-sampling applications. The 10-bit/30 MSPS combo covers audio-bandwidth, vibration, and general transducer signal acquisition in industrial or scientific instruments. Decoupling the AVDD rail with a low-ESR ceramic and routing the analog section on a quiet ground island are key to preserving SNR across the full conversion range.
Recommended
Industrial Machine Vision Preprocessing
For entry-level machine-vision systems - part inspection, barcode scanning, simple pick-and-place alignment - the THS1031IDWR provides a cost-effective analog front-end to an FPGA or DSP that performs the image-processing pipeline. The 30 MSPS throughput supports VGA-resolution cameras at 30 fps with single-channel digitizing, and the integrated clamp removes external coupling components. Industrial temperature range (-40 °C to +85 °C) ensures operation in factory environments without thermal derating. Pair the ADC with a TVS-protected input front-end and an isolated power supply to meet industrial EMC immunity standards.
Recommended
Recommended Products Summary
Engineering reference data for THS1031IDWR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | THS1031IDW | THS1031IDWRG4 | ADS830E/2K5 | AD9200JRSZ | AD9200ARSZ |
|---|---|---|---|---|---|---|
| Package | SOIC-28 (DW) | SOIC-28 (DW) - same | SOIC-28 (DW) - same | SOIC-28 - same form factor | SOIC-28 (RS) - same form factor | SOIC-28 (RS) - same form factor |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices |
| Resolution | 10 bits | 10 bits | 10 bits | 8 bits | 10 bits | 10 bits |
| Sample Rate | 30 MSPS | 30 MSPS | 30 MSPS | 60 MSPS | 20 MSPS | 20 MSPS |
| Supply Voltage | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Channels | 1 | 1 | 1 | 1 | 1 | 1 |
| Digital Clamp | Yes (programmable) | Yes (programmable) | Yes (programmable) | External required | No | No |
| Out-of-Range Indicator | Yes | Yes | Yes | No | No | No |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | 0 °C to +70 °C | -40 °C to +85 °C |
Key Differentiators
- Integrated programmable digital clamp eliminates external coupling cap (vs AD9200ARSZ)
- Out-of-range indicator for AGC loop control (vs ADS830E/2K5)
- 30 MSPS throughput in a low-power CMOS design (vs AD9200JRSZ)
Design Notes
Route the SOIC-28 footprint with a dedicated analog ground island - separate AGND and DGND should be tied together at a single point near the ADC's AGND pin (star-ground topology) to prevent digital return currents from corrupting the analog front-end. A solid ground plane on the inner layer beneath the ADC package, with no traces crossing the analog section, is essential for preserving the datasheet SNR at 30 MSPS throughput.
Place a 0.1 µF X7R ceramic bypass capacitor as close as possible (within 2 mm) to the AVDD pin, paired with a 10 µF bulk tantalum or polymer tantalum capacitor on the same rail. For DVDD, mirror this decoupling pair but place it physically closer to the SOIC-28's digital-supply pins. The Powerdown (PD) pin, when asserted, drops quiescent current to a few microamps - useful for battery applications between acquisitions.
Clock the THS1031IDWR with a low-jitter CMOS source (jitter under 50 ps RMS). Per the TI datasheet timing diagrams, hold-and-setup margins are tight for parallel-output capture into an FPGA at 30 MSPS - use short, matched-impedance traces for the D0-D9 outputs and the clock, terminated with a series resistor near the ADC if the FPGA is more than 50 mm away. The CLK trace should be length-matched to within 1 mm of the data bus length to prevent capture misalignment.
Do not operate the analog input above AVDD or below AGND - the input protection diodes will forward-conduct and inject distortion into the conversion result. When using the differential mode, ensure the common-mode voltage of the differential pair sits within the analog-input common-mode range specified in the electrical characteristics table, otherwise the input stage will saturate and the OTR (out-of-range) flag will assert.
Compliance Information
RoHS and Pb-free per TI product page. Industrial grade (-40 °C to +85 °C) only - not AEC-Q100 qualified for automotive. For automotive applications use a Q1-qualified alternative.
