ADS5521IPAPRG4 - 12-Bit 105MSPS Pipeline ADC | Texas Instruments
Référence : ADS5521IPAPRG4 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $47.85 | $47,85 |
| 10 | $42.95 | $429,50 |
| 100 | $36.5 | $3 650,00 |
| 500 | $30.2 | $15 100,00 |
| 1 000 | $25.4 | $25 400,00 |
ADS5521IPAPRG4 Présentation
An analog-to-digital converter (ADC) is a semiconductor device that transforms continuously varying analog signals into discrete digital codes at a defined sampling rate. Pipelined ADCs use multiple cascaded low-resolution stages, each sampling one clock-cycle later than the previous stage, to achieve high sample rates (tens to hundreds of MSPS) while keeping per-stage conversion speed moderate. Pipelined ADCs sit in the signal chain hierarchy between successive-approximation (SAR) ADCs (lower power, lower speed, kilohertz to low MSPS) and flash ADCs (highest speed, lowest resolution, highest power). They are the workhorse of high-speed digital signal acquisition in communications, instrumentation, defense, and medical imaging systems.
Key specifications from the manufacturer datasheet include 105 MSPS maximum sample rate, 12-bit resolution, 2.3 VPP differential input range, 3.3 V single-supply analog operation, and 564 mW typical analog power dissipation. The differential input device supports high spurious-free dynamic range (SFDR) and high signal-to-noise ratio (SNR) at 100 MHz input frequency, making it well suited for digitizing wideband IF signals. Industrial temperature range (-40C to +85C) and Pb-free / green RoHS-compliant packaging suit harsh-environment deployments.
The ADS5521 uses a multi-stage pipelined architecture with on-chip sample-and-hold, internal voltage reference, and digital error correction. CMOS outputs deliver LVCMOS-compatible levels; optional LVDS output mode is not used on the PAP package. The pipelined topology provides one clock cycle of pipeline latency and inherent INL/DNL linearity suitable for communications signal chains.
Typical applications include wireless communications IF sampling, medical imaging (ultrasound beamforming), radar signal processing, defense electronics (EW / DRFM), cable-headend infrastructure (QAM/DVB-C digitizers), and high-speed data acquisition cards. The wide input bandwidth and high SFDR at 100 MHz IF make the part especially attractive for direct-IF sampling receivers.
When designing with this ADC, allocate a quiet analog 3.3V rail separate from the digital 3.3V supply, decouple the AVDD/DRVDD pins with 0.1 uF ceramic plus 10 uF bulk capacitors, and provide a low-jitter clock source - aperture jitter is the dominant SNR-limiting factor at 100 MHz IF.
This page synthesizes distributor pricing, drop-in alternates, and practical design guidance not collected in the manufacturer datasheet.
Alternatives de remplacement direct pour ADS5521IPAPRG4 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ADS5521IPAPRG4 (même facteur de forme et même empreinte) — différant par Analog Power Dissipation, Internal Voltage Reference, Number of Input Channels, Package, Resolution.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADS5521IPAPG4
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS5520IPAP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS5522IPAP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS5521IPAP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS5520IPAPG4
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS5522IPAPG4
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS5521IPAPRG4 Valeurs maximales et caractéristiques électriques
| Résolution | 12 bit |
| Sample Rate | 105 MSPS (max) |
| Architecture | Pipelined |
| Number of Input Channels | 1 (differential) |
| Input Voltage Range (Differential) | 2.3 VPP |
| Analog Supply Voltage | 3.3 V (single supply) |
| Digital Supply Voltage | 3.3 V (DRVDD) |
| Internal Voltage Reference | Yes (integrated) |
| Analog Power Dissipation | 564 mW (typical, 105 MSPS) |
| Plage de température de fonctionnement | -40C to +85C (industrial) |
| Boîtier | 64-pin HTQFP (PAP), 10x10 mm |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant (Pb-free / green) |
Configuration des broches de ADS5521IPAPRG4
| Broche 1 | DRGND — Digital output ground |
| Broche 2 | DRVDD — Digital output supply (3.3 V) |
| Broche 3 | D11 — Data output MSB |
| Broche 4 | D10 — Data output |
| Broche 5 | D9 — Data output |
| Broche 6 | D8 — Data output |
| Broche 7 | D7 — Data output |
| Broche 8 | D6 — Data output |
| Broche 9 | D5 — Data output |
| Broche 10 | D4 — Data output |
| Broche 11 | D3 — Data output |
| Broche 12 | D2 — Data output |
| Broche 13 | D1 — Data output |
| Broche 14 | D0 — Data output LSB |
| Broche 15 | DRGND — Digital output ground |
| Broche 16 | DRVDD — Digital output supply (3.3 V) |
| Broche 17 | AVDD — Analog supply (3.3 V) |
| Broche 18 | AVSS — Analog ground |
| Broche 19 | INP — Differential analog input, positive |
| Broche 20 | INN — Differential analog input, negative |
| Broche 21 | VCM — Common-mode voltage output |
| Broche 22 | REFT — Top reference decoupling |
| Broche 23 | REFB — Bottom reference decoupling |
| Broche 24 | AVSS — Analog ground |
| Broche 25 | AVDD — Analog supply (3.3 V) |
| Broche 26 | AVSS — Analog ground |
| Broche 27 | AVDD — Analog supply (3.3 V) |
| Broche 28 | AVSS — Analog ground |
| Broche 29 | AVDD — Analog supply (3.3 V) |
| Broche 30 | AVSS — Analog ground |
| Broche 31 | AVDD — Analog supply (3.3 V) |
| Broche 32 | AVSS — Analog ground |
| Broche 33 | NC — Not connected (per datasheet) |
| Broche 34 | AVSS — Analog ground |
| Broche 35 | CLK — Sample clock input |
| Broche 36 | CLKB — Complementary clock input (tie to CLK if unused) |
| Broche 37 | AVSS — Analog ground |
| Broche 38 | AVDD — Analog supply (3.3 V) |
| Broche 39 | AVSS — Analog ground |
| Broche 40 | SEN — Sample enable (active high) |
| Broche 41 | SCLK — Serial programming clock |
| Broche 42 | SDATA — Serial programming data |
| Broche 43 | SDOUT — Serial programming data output |
| Broche 44 | RESET — Hardware reset (active low) |
| Broche 45 | PD — Power-down (active high) |
| Broche 46 | AVSS — Analog ground |
| Broche 47 | AVDD — Analog supply (3.3 V) |
| Broche 48 | AVSS — Analog ground |
| Broche 49 | NC — Not connected (per datasheet) |
| Broche 50 | AVSS — Analog ground |
| Broche 51 | AVDD — Analog supply (3.3 V) |
| Broche 52 | AVSS — Analog ground |
| Broche 53 | AVDD — Analog supply (3.3 V) |
| Broche 54 | AVSS — Analog ground |
| Broche 55 | AVDD — Analog supply (3.3 V) |
| Broche 56 | AVSS — Analog ground |
| Broche 57 | AVDD — Analog supply (3.3 V) |
| Broche 58 | AVSS — Analog ground |
| Broche 59 | AVDD — Analog supply (3.3 V) |
| Broche 60 | AVSS — Analog ground |
| Broche 61 | DRVDD — Digital output supply (3.3 V) |
| Broche 62 | DRGND — Digital output ground |
| Broche 63 | NC — Not connected (per datasheet) |
| Broche 64 | PAD — Exposed thermal pad (connect to AVSS) |
Applications typiques
ADS5521IPAPRG4 convient pour 6 applications: Wireless Communications IF Sampling, Ultrasound Beamforming Receivers, Radar and Defense EW Receivers, Cable-Headend QAM / DVB-C Digitizers, High-Speed Data Acquisition Cards, Test and Measurement Instrumentation.
Wireless Communications IF Sampling
The ADS5521IPAPRG4's 105 MSPS sample rate and 2.3 VPP differential input make it well-suited for direct-IF sampling in wireless base-station and software-defined-radio receivers. At a 100 MHz IF, the converter preserves high SFDR, which is critical for separating adjacent WCDMA / LTE channels. The integrated sample-and-hold and internal reference reduce the analog front-end BOM compared to discrete ADC designs. Pair the ADC with a low-jitter clock generator such as the CDCM61004 or LMK04828 to meet the aperture-jitter budget at 100 MHz IF.
Recommandé
Ultrasound Beamforming Receivers
In medical ultrasound systems the ADS5521IPAPRG4 serves as the per-channel high-speed ADC in the receive beamformer, digitizing the post-TGC signal at 105 MSPS with 12-bit resolution. The differential input rejects common-mode noise from the long transducer cables, while the pipelined architecture delivers low latency suitable for real-time imaging. Industrial temperature range (-40C to +85C) supports portable-cart and bedside-cart deployments. Buffer the digital outputs through LVCMOS fanout such as SN74AVC16T245 to drive FPGAs for beamforming DSP.
Recommandé
Radar and Defense EW Receivers
Electronic-warfare and radar-receiver subsystems rely on wideband ADCs to capture pulsed-RF and frequency-agile signals. The ADS5521IPAPRG4's 105 MSPS sample rate (Nyquist to 52.5 MHz baseband or IF-sampling well beyond that) plus 2.3 VPP differential input suit narrow-band IF digitizers used in ESM/ELINT receivers. Low aperture jitter preserves SNR on short radar pulses where the time-domain accuracy is critical. The 64-HTQFP industrial-temperature package supports ground-mobile and shipboard platforms.
Recommandé
Cable-Headend QAM / DVB-C Digitizers
Cable headend receivers digitize 44 MHz-bandwidth downstream channels. The ADS5521IPAPRG4's 105 MSPS sample rate supports oversampling the 6 MHz / 8 MHz QAM channels while leaving guard-band margin, and its 12-bit resolution preserves the carrier-to-noise margin required for 256-QAM and 1024-QAM constellations. Differential input rejects common-mode hum from the headend chassis. The 564 mW typical dissipation simplifies the host-board thermal budget compared with higher-speed flash parts.
Recommandé
High-Speed Data Acquisition Cards
PCIe and PXIe data-acquisition cards use the ADS5521IPAPRG4 as the per-channel digitizer for general-purpose waveform capture. The 105 MSPS sample rate captures repetitive transients and single-shot waveforms up to 52 MHz bandwidth, while the 12-bit resolution suits general lab use. Industrial temperature rating and 64-HTQFP (10x10 mm) footprint simplify card layout and thermal management. Buffer the digital outputs to a FPGA for storage and post-processing.
Recommandé
Test and Measurement Instrumentation
Digital oscilloscopes, spectrum analyzers, and signal-integrity test equipment use the ADS5521IPAPRG4 in the analog front end. The 105 MSPS sample rate captures repetitive waveforms, and the 2.3 VPP differential input matches typical probe-buffer outputs (such as the THS4631). Industrial temperature grade and Pb-free packaging meet the reliability expectations of benchtop and ATE instrumentation. The exposed thermal pad supports continuous operation at full 105 MSPS without thermal throttling.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADS5521IPAPRG4 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADS5521IPAPG4 | ADS5520IPAP | ADS5522IPAP | ADS5521IPAP |
|---|---|---|---|---|---|
| Package | 64-HTQFP (PAP), 10x10 mm | 64-HTQFP (PAP), 10x10 mm | 64-HTQFP (PAP), 10x10 mm | 64-HTQFP (PAP), 10x10 mm | 64-HTQFP (PAP), 10x10 mm |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sample Rate | 105 MSPS | 105 MSPS | 125 MSPS | 80 MSPS | 105 MSPS |
| Input Range | 2.3 VPP differential | 2.3 VPP differential | 2.3 VPP differential | 2.3 VPP differential | 2.3 VPP differential |
| Analog Supply | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Internal Reference | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Principaux différenciateurs
- Best balance of 105 MSPS sample rate and 12-bit resolution in the ADS552x family (vs ADS5522IPAP)
- Pb-free / RoHS-compliant tape-and-reel packaging (RG4 suffix) (vs ADS5521IPAP)
- Internal voltage reference eliminates external reference IC (vs External-reference ADCs in the same speed class)
Notes de conception
Power the AVDD analog supply from a low-noise 3.3 V LDO such as the TPS7A4701RGWR rather than directly from a switching converter. The ADS5521IPAPRG4's SFDR and SNR are highly sensitive to supply noise on AVDD; even tens of microvolts of ripple can degrade SFDR by 5-10 dB at 100 MHz IF. Decouple each AVDD pin with a 0.1 uF X7R ceramic placed within 3 mm of the pin plus a 10 uF bulk capacitor on the analog supply plane.
The ADS5521IPAPRG4 dissipates roughly 564 mW of analog power at 105 MSPS, which is modest but not negligible. Solder the exposed thermal pad (pin 64 / PAD) to a continuous AVSS copper pour on the top and inner layers with at least 16 thermal vias to a bottom ground plane. Without proper thermal pad soldering the junction-to-ambient thermal resistance rises and can degrade long-term reliability near the upper end of the -40C to +85C industrial range.
Aperture jitter, not the ADC's intrinsic SNR, is the dominant noise source at high input frequencies. The SNR degradation with input frequency follows SNR_jitter = 20*log10(2*pi*fIN*tJ). For 100 MHz IF and 1 ps RMS clock jitter the SNR floor is approximately 64 dB. Use a low-jitter clock generator such as the CDCM61004 or LMK04828; avoid distributing the sample clock through long FR4 traces or through FPGAs with high additive jitter.
Route the differential analog inputs INP/INN as a tightly-coupled 100 ohm differential pair with ground-fill on each side. The 2.3 VPP differential input is sensitive to common-mode pickup; route INP/INN directly from the output of a differential ADC driver (such as the THS4511) with the shortest possible trace length. Keep digital output buses (D0-D11) physically separated from the analog input pair to avoid digital-to-analog coupling.
Terminate the LVCMOS digital outputs (D0-D11) with a 100 ohm series resistor close to the ADC and a 50 ohm to 100 ohm termination at the FPGA side to control ringing and overshoot at 105 MSPS. Series termination minimizes reflections without loading the ADC outputs. Use source-synchronous clocking (CLK to FPGA with matched trace length) to achieve reliable capture of the parallel data bus.
Informations de conformité
Pb-free / green per TI product page. AEC-Q100 not applicable (industrial / consumer ADC, not automotive qualified). Conflict-minerals compliance per TI declaration.
