ADS5103IPFBR - 10-Bit 40MSPS ADC | 48-TQFP | Texas Instruments
MPN： ADS5103IPFBR ✗ 停產ADS5103IPFBR 概覽
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.
直接替換替代品，適用於 ADS5103IPFBR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADS5103IPFBR （相同外形與佔位） — 差異在於 Package, Reference, Input Type, Digital Supply Voltage, Architecture.
ADS5103IPFBRG4
✅ 直接替換聯絡詢價
查看資料表 →ADS5103CPFBR
✅ 直接替換聯絡詢價
查看資料表 →ADS5103CPFBRG4
✅ 直接替換聯絡詢價
查看資料表 →ADS5102IPFBR
✅ 直接替換聯絡詢價
查看資料表 →ADS5103IPFBR 最大額定值與電氣特性
| 解析度 | 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) |
| 封裝 | 48-pin TQFP (PFB) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
ADS5103IPFBR 腳位配置
| 腳位 1 | AGND — Analog ground |
| 腳位 2 | AVDD — Analog 1.8 V supply |
| 腳位 3 | IN+ — Differential analog input, non-inverting |
| 腳位 4 | IN- — Differential analog input, inverting |
| 腳位 5 | REF — Reference (internal/external) |
| 腳位 6 | REFT — Reference decoupling top |
| 腳位 7 | REFB — Reference decoupling bottom |
| 腳位 8 | AGND — Analog ground |
| 腳位 9 | AVDD — Analog 1.8 V supply |
| 腳位 10 | CM — Common-mode voltage |
| 腳位 11 | NC — Not connected (per datasheet) |
| 腳位 12 | DRVDD — Digital driver supply (3.3 V) |
| 腳位 13 | D9 — Data output bit 9 (MSB) |
| 腳位 14 | D8 — Data output bit 8 |
| 腳位 15 | D7 — Data output bit 7 |
| 腳位 16 | D6 — Data output bit 6 |
| 腳位 17 | D5 — Data output bit 5 |
| 腳位 18 | D4 — Data output bit 4 |
| 腳位 19 | D3 — Data output bit 3 |
| 腳位 20 | D2 — Data output bit 2 |
| 腳位 21 | D1 — Data output bit 1 |
| 腳位 22 | D0 — Data output bit 0 (LSB) |
| 腳位 23 | DRGND — Digital driver ground |
| 腳位 24 | NC — Not connected (per datasheet) |
| 腳位 25 | NC — Not connected (per datasheet) |
| 腳位 26 | CLK — Sample clock input |
| 腳位 27 | CLKB — Complementary sample clock |
| 腳位 28 | CLKOUT — Clock output buffer |
| 腳位 29 | PWRDN — Power-down input (active high) |
| 腳位 30 | PDN-OUT — Power-down mode status output |
| 腳位 31 | DRVDD — Digital driver supply (3.3 V) |
| 腳位 32 | DRGND — Digital driver ground |
| 腳位 33 | NC — Not connected (per datasheet) |
| 腳位 34 | NC — Not connected (per datasheet) |
| 腳位 35 | NC — Not connected (per datasheet) |
| 腳位 36 | DRGND — Digital driver ground |
| 腳位 37 | DRVDD — Digital driver supply (3.3 V) |
| 腳位 38 | NC — Not connected (per datasheet) |
| 腳位 39 | NC — Not connected (per datasheet) |
| 腳位 40 | NC — Not connected (per datasheet) |
| 腳位 41 | AGND — Analog ground |
| 腳位 42 | AVDD — Analog 1.8 V supply |
| 腳位 43 | REFT — Reference decoupling top |
| 腳位 44 | REFB — Reference decoupling bottom |
| 腳位 45 | REFGND — Reference ground |
| 腳位 46 | VCOM — Common-mode bypass |
| 腳位 47 | AGND — Analog ground |
| 腳位 48 | AVDD — Analog 1.8 V supply |
典型應用
ADS5103IPFBR 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 ADS5103IPFBR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Higher sample rate family member available on the same footprint (對比ADS5102IPFBR)
- Active commercial-grade option while IPFB is obsolete (對比ADS5103CPFBR)
- Industrial temperature grade at 40 MSPS / 10-bit (對比ADS5103CPFBR)
設計說明
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.
合規資訊
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.