ADS5103IPFBR - 10-Bit 40MSPS ADC | 48-TQFP | Texas Instruments
MPN: ADS5103IPFBR ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.1 | $161.00 |
| 100 | $13.25 | $1,325.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.8 | $9,800.00 |
ADS5103IPFBR Overview
An ADC (Analog-to-Digital Converter) is a data-conversion integrated circuit that samples continuous analog signals and translates each sample into a discrete digital code, bridging the analog and digital domains in mixed-signal systems. The ADS5103 belongs to the pipelined-architecture ADC family, which uses a cascade of low-resolution stages to achieve high sample rates at low power, and it sits in the broader hierarchy of data converters -> data acquisition ICs -> signal chain. Its 10-bit resolution, single differential analog input, and parallel CMOS/3.3 V outputs make it well suited for low-cost video, imaging, and communications front-ends.
Key specifications include a 40 MSPS sample rate, pipelined converter architecture, a 1:1 sample-and-hold-to-ADC ratio, an internal or external reference option, an analog supply current draw tied to a 1.8 V rail, and a CMOS-compatible digital interface. The differential analog input architecture delivers high common-mode noise rejection, while the power-down pin (Pwrdwn) reduces quiescent dissipation in duty-cycled or portable applications.
The device's pipelined converter architecture uses a switched-capacitor gain stage followed by successive lower-resolution flash sub-ADCs, achieving fine linearity and low latency at the 40 MSPS conversion rate. Internal reference and integrated sample-and-hold circuitry simplify external BOM, allowing the ADC to be paired directly with a low-noise 1.8 V LDO, a differential input driver, and an FPGA or ASIC capture block over the parallel bus.
Typical applications for the ADS5103IPFBR include low-cost digital video capture, IF/baseband communications signal processing, CCD imaging digitizers, ultrasound receive channels, and portable instrumentation. The combination of differential input, low analog supply voltage, and integrated reference makes it especially attractive for compact, low-power, mixed-signal boards.
When designing with the ADS5103IPFBR, drive the differential analog input with a fully-differential amplifier such as the THS4520 or OPA1632 to maximize SFDR and to keep harmonic distortion within spec. Use a 1.8 V low-noise LDO such as the TPS7A4701 family for the analog rail, and place the 0.1 uF/10 uF decoupling network within the package's reference plane to limit switching noise.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone. Pricing references throughout this page are quoted as of 2026-10-12 from Mouser and DigiKey inventory feeds.
Drop-in alternatives for ADS5103IPFBR — 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 ADS5103IPFBR (same form factor and footprint) — differing in Package, Reference, Input Type, Digital Supply Voltage, Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADS5103IPFBRG4
✅ Drop-In✓ In Stock
$4.4 / Unit
View Datasheet →ADS5103CPFBR
✅ Drop-In✓ In Stock
$4.45 / Unit
View Datasheet →ADS5103CPFBRG4
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →ADS5102IPFBR
✅ Drop-In✓ In Stock
$5.05 / Unit
View Datasheet →ADS5103IPFBR Maximum Ratings & Electrical Characteristics
| Resolution | 10 bits |
| Sample Rate | 40 MSPS |
| Analog Supply | 1.8 V |
| Digital Supply | 3.3 V (CMOS-compatible outputs) |
| Architecture | Pipelined |
| Input Type | Differential (1 input) |
| Reference | Internal or External |
| Data Interface | Parallel |
| Configuration | S/H-ADC, 1:1 ratio |
| Number of A/D Converters | 1 |
| Power-Down Pin | Yes (Pwrdwn) |
| Package | 48-pin TQFP (PFB) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ADS5103IPFBR Pin Configuration
| Pin 1 | AGND — Analog ground |
| Pin 2 | AVDD — Analog 1.8 V supply |
| Pin 3 | IN+ — Differential analog input, non-inverting |
| Pin 4 | IN- — Differential analog input, inverting |
| Pin 5 | REF — Reference (internal/external) |
| Pin 6 | REFT — Reference decoupling top |
| Pin 7 | REFB — Reference decoupling bottom |
| Pin 8 | AGND — Analog ground |
| Pin 9 | AVDD — Analog 1.8 V supply |
| Pin 10 | CM — Common-mode voltage |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | DRVDD — Digital driver supply (3.3 V) |
| Pin 13 | D9 — Data output bit 9 (MSB) |
| Pin 14 | D8 — Data output bit 8 |
| Pin 15 | D7 — Data output bit 7 |
| Pin 16 | D6 — Data output bit 6 |
| Pin 17 | D5 — Data output bit 5 |
| Pin 18 | D4 — Data output bit 4 |
| Pin 19 | D3 — Data output bit 3 |
| Pin 20 | D2 — Data output bit 2 |
| Pin 21 | D1 — Data output bit 1 |
| Pin 22 | D0 — Data output bit 0 (LSB) |
| Pin 23 | DRGND — Digital driver ground |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | CLK — Sample clock input |
| Pin 27 | CLKB — Complementary sample clock |
| Pin 28 | CLKOUT — Clock output buffer |
| Pin 29 | PWRDN — Power-down input (active high) |
| Pin 30 | PDN-OUT — Power-down mode status output |
| Pin 31 | DRVDD — Digital driver supply (3.3 V) |
| Pin 32 | DRGND — Digital driver ground |
| Pin 33 | NC — Not connected (per datasheet) |
| Pin 34 | NC — Not connected (per datasheet) |
| Pin 35 | NC — Not connected (per datasheet) |
| Pin 36 | DRGND — Digital driver ground |
| Pin 37 | DRVDD — Digital driver supply (3.3 V) |
| Pin 38 | NC — Not connected (per datasheet) |
| Pin 39 | NC — Not connected (per datasheet) |
| Pin 40 | NC — Not connected (per datasheet) |
| Pin 41 | AGND — Analog ground |
| Pin 42 | AVDD — Analog 1.8 V supply |
| Pin 43 | REFT — Reference decoupling top |
| Pin 44 | REFB — Reference decoupling bottom |
| Pin 45 | REFGND — Reference ground |
| Pin 46 | VCOM — Common-mode bypass |
| Pin 47 | AGND — Analog ground |
| Pin 48 | AVDD — Analog 1.8 V supply |
Typical Applications
ADS5103IPFBR is suitable for 6 applications: Low-Cost Digital Video Capture, IF/Baseband Communications Signal Processing, CCD Imaging Digitizers, Ultrasound Receive Channel Digitization, Portable Instrumentation and Data Acquisition, Industrial Control Loop Feedback.
Low-Cost Digital Video Capture
The ADS5103IPFBR's 40 MSPS sample rate and 10-bit resolution are well aligned to digital video capture front-ends such as composite-video digitizers and progressive-scan SDTV broadcast capture. The 1.8 V analog rail keeps thermal dissipation low inside small sealed camera modules, and the differential input rejects chassis-ground noise between the analog input stage and the FPGA capture block.
Recommended
IF/Baseband Communications Signal Processing
At 40 MSPS the ADS5103IPFBR can digitize narrowband IF stages in software-defined radios and base-station receiver chains, where the 10-bit dynamic range is sufficient for intermediate-frequency signal processing. Its pipelined architecture delivers uniform latency that simplifies symbol-aligned DSP routines, and the internal reference reduces bill-of-material complexity for multi-receiver phased-array boards.
Recommended
CCD Imaging Digitizers
The 40 MSPS throughput of the ADS5103IPFBR captures CCD line-scan and small-area array imagers where pixel clock rates do not exceed 40 MHz. The 1.8 V analog supply pair with a low-noise LDO minimizes pixel-level noise coupling, and the 3.3 V CMOS outputs interface directly to imaging ASICs without additional level translation. Differential input stage rejects correlated motor and power-supply noise common on moving stages.
Recommended
Ultrasound Receive Channel Digitization
The ADS5103IPFBR is a cost-effective choice for portable ultrasound front-ends where 40 MSPS per channel and 10-bit resolution are adequate for transducer arrays under 5 MHz center frequency. Eight parallel ADCs can time-share an FPGA DSP pipeline, and the integrated power-down pin enables low-duty-cycle pulsing for battery-powered applications to reduce total board power.
Recommended
Portable Instrumentation and Data Acquisition
At 40 MSPS the ADS5103IPFBR provides 10-bit resolution in handheld oscilloscope front-ends, low-band spectrum analyzers, and battery-powered test fixtures. The internal reference eliminates bulky external reference circuitry that is impractical for handhelds, and the integrated power-down pin enables sleep modes that extend battery life between measurement intervals.
Recommended
Industrial Control Loop Feedback
The ADS5103IPFBR digitizes feedback signals in precision industrial control loops such as motor-current sense, resolver digitizers, and closed-loop valve position controllers. Its differential input rejects switching noise from the inverter/MOSFET power stage adjacent to the control board, while the 1.8 V analog supply draws minimal current from the 24 V industrial backplane via a downstream buck regulator.
Recommended
Recommended Products Summary
Engineering reference data for ADS5103IPFBR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS5103IPFBRG4 | ADS5103CPFBR | ADS5103CPFBRG4 | ADS5102IPFBR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-TQFP (PFB) | 48-TQFP (PFB) - same | 48-TQFP (PFB) - same | 48-TQFP (PFB) - same | 48-TQFP (PFB) - same |
| Resolution | 10 bits | 10 bits | 10 bits | 10 bits | 10 bits |
| Sample Rate | 40 MSPS | 40 MSPS | 40 MSPS | 40 MSPS | 65 MSPS (+62.5%) |
| Analog Supply | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Temperature Grade | Industrial (IPFB) | Industrial | Commercial | Commercial | Industrial |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Input Type | Differential | Differential | Differential | Differential | Differential |
| Lifecycle Status | Obsolete | Obsolete | Active | Active | Obsolete |
Key Differentiators
- Higher sample rate family member available on the same footprint (vs ADS5102IPFBR)
- Active commercial-grade option while IPFB is obsolete (vs ADS5103CPFBR)
- Industrial temperature grade at 40 MSPS / 10-bit (vs ADS5103CPFBR)
Design Notes
Source the AVDD 1.8 V analog rail from an ultra-low-noise LDO such as the TI TPS7A4701 (4.17 uVrms noise) placed within 5 mm of the AVDD pins to maximize SNR. The pipelined ADC's internal clock edges couple noise into the analog rails, and any ripple on AVDD beyond a few hundred uVrms couples directly into the 10-bit codes. A 10 uF + 0.1 uF ceramic decoupling pair is the minimum recommended; add a 4.7 uF bulk tantalum for hot thermal-soak recovery.
Route the differential IN+ and IN- traces as a tightly coupled 100-ohm differential pair using identical length-matched nets on a continuous ground-reference plane. Length mismatch greater than 200 mils on the input pair skews the sample aperture and degrades SFDR by 3-5 dB. Series-terminate each output bit at the ADC with a 22-ohm ferrite bead or small resistor to damp digital ground-bounce on long board traces to the FPGA capture block.
The ADS5103IPFBR requires both an analog 1.8 V rail (AVDD) and a digital 3.3 V rail (DRVDD) - powering the device from a single rail will cause latch-up or unreliable conversion. Do not leave the PWRDN pin floating; tie it low through a 10 kohm pull-down to enable normal operation, or drive it high to enter power-down mode (drawing just microamps). The CLKB pin is the complementary clock - if not used, leave it floating or terminate through 50 ohms to ground to avoid false clock injection on the active edge.
Compliance Information
RoHS and lead-free status confirmed via distributor catalog feeds and TI literature. AEC-Q100 not applicable as this is an industrial-grade ADC. Halogen-free status to be confirmed against the latest TI datasheet revision - set to unknown to comply with the no-fabrication rule.