TSA1204IFT - 12-Bit 20MSPS Dual-Channel ADC | STMicroelectronics
N.º da peça: TSA1204IFT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $9.85 | $9,85 |
| 10 | $8.92 | $89,20 |
| 100 | $7.48 | $748,00 |
| 500 | $6.25 | $3.125,00 |
| 1.000 | $5.4 | $5.400,00 |
TSA1204IFT Visão geral
An Analog-to-Digital Converter (ADC) is a mixed-signal integrated circuit that converts continuous-time analog voltages into discrete digital codes at a specified sampling rate. Dual-channel pipelined ADCs belong to the broader hierarchy of data converter IC -> mixed-signal IC -> semiconductor, and they occupy the performance tier between successive-approximation (SAR) converters (slow, low-power, <5 MSPS) and high-speed flash converters (very fast, very high power). The TSA1204IFT targets moderate-bandwidth multi-channel systems where engineers need two synchronized channels without the cost of two discrete ADCs.
Key features include a 1 GHz analog input bandwidth, an integrated Track-and-Hold amplifier, 11.2-bit effective number of bits (ENOB) at the Nyquist input frequency, and -81.5 dBc spurious-free dynamic range (SFDR) at Nyquist. The 0.25 micrometer CMOS process enables adaptive power consumption scaling from 0.5 MSPS to 20 MSPS, allowing the part to drop to lower power in standby. The CMOS outputs are pin-selectable between 2.5 V and 3.3 V logic levels, simplifying interface to FPGAs, ASICs, or microcontrollers in mixed-voltage systems.
Typical applications include dual-channel digital oscilloscopes, intermediate-frequency (IF) signal processing in communications receivers, ultrasound imaging front-ends, and high-speed industrial data acquisition. The dual channel allows simultaneous sampling of in-phase and quadrature (I/Q) baseband signals, or two channels of a multi-channel instrumentation system.
When designing with the TSA1204IFT, place the analog and digital ground returns on a split ground plane joined under the ADC, use wide PCB traces for the analog supply pins, and decouple each supply pin with 100 nF and 10 uF capacitors placed as close as possible to the device. The exposed pad of the TQFP should be soldered to a ground plane for thermal and electrical performance.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not collected in any single manufacturer datasheet revision, giving engineers a one-stop reference for sourcing and second-sourcing the TSA1204IFT.
Alternativas drop-in para TSA1204IFT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com TSA1204IFT (mesmo formato e footprint) — diferindo em Analog Supply Voltage, Package, Resolution.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TSA1204IPT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TSA1204IPFT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TSA1204IPFTR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TSA1204IFT-E
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TSA1204IFT Classificações máximas e características elétricas
| Resolução | 12 bit |
| Number of Channels | 2 (dual) |
| Taxa de amostragem | 0.5 MSPS to 20 MSPS |
| Architecture | Pipelined |
| Analog Supply Voltage | 2.5 V (single) |
| Output Logic Supply | 2.5 V / 3.3 V (independent) |
| Power Consumption | 120 mW at 20 MSPS |
| Adaptive Power | 95 mW at 10 MSPS (scales with fs) |
| ENOB at Nyquist | 11.2 bit |
| SFDR at Nyquist | -81.5 dBc |
| Analog Input Bandwidth | 1 GHz |
| Track-and-Hold | Integrated |
| Process Technology | 0.25 um CMOS |
| Encapsulamento | 48-TQFP (7x7 mm) |
| Tipo de montagem | Surface Mount |
| Temperatura de operação | -40 C to +85 C (industrial) |
| Status RoHS | Compliant |
Configuração de pinos do TSA1204IFT
| Pino 1 | INA — Analog input channel A |
| Pino 2 | INTA — Complementary analog input channel A |
| Pino 3 | VCM — Common-mode voltage reference |
| Pino 4 | REFB — Bottom reference voltage |
| Pino 5 | REFT — Top reference voltage |
| Pino 6 | AGND — Analog ground |
| Pino 7 | AVDD — Analog supply 2.5 V |
| Pino 8 | NC — Not connected (per datasheet) |
| Pino 9 | INB — Analog input channel B |
| Pino 10 | INTB — Complementary analog input channel B |
| Pino 11 | CLK — Clock input |
| Pino 12 | CLKT — Complementary clock input |
| Pino 13 | DGND — Digital ground |
| Pino 14 | OVDD — Output supply 2.5/3.3 V |
| Pino 15 | D0A — Data output A bit 0 (LSB) |
| Pino 16 | D1A — Data output A bit 1 |
| Pino 17 | D2A — Data output A bit 2 |
| Pino 18 | D3A — Data output A bit 3 |
| Pino 19 | D4A — Data output A bit 4 |
| Pino 20 | D5A — Data output A bit 5 |
| Pino 21 | D6A — Data output A bit 6 |
| Pino 22 | D7A — Data output A bit 7 |
| Pino 23 | D8A — Data output A bit 8 |
| Pino 24 | D9A — Data output A bit 9 |
| Pino 25 | D10A — Data output A bit 10 |
| Pino 26 | D11A — Data output A bit 11 (MSB) |
| Pino 27 | DGND — Digital ground |
| Pino 28 | OVDD — Output supply 2.5/3.3 V |
| Pino 29 | D0B — Data output B bit 0 (LSB) |
| Pino 30 | D1B — Data output B bit 1 |
| Pino 31 | D2B — Data output B bit 2 |
| Pino 32 | D3B — Data output B bit 3 |
| Pino 33 | D4B — Data output B bit 4 |
| Pino 34 | D5B — Data output B bit 5 |
| Pino 35 | D6B — Data output B bit 6 |
| Pino 36 | D7B — Data output B bit 7 |
| Pino 37 | D8B — Data output B bit 8 |
| Pino 38 | D9B — Data output B bit 9 |
| Pino 39 | D10B — Data output B bit 10 |
| Pino 40 | D11B — Data output B bit 11 (MSB) |
| Pino 41 | OEA — Output enable channel A |
| Pino 42 | OEB — Output enable channel B |
| Pino 43 | NC — Not connected (per datasheet) |
| Pino 44 | DGND — Digital ground |
| Pino 45 | AVDD — Analog supply 2.5 V |
| Pino 46 | AGND — Analog ground |
| Pino 47 | REFT — Top reference voltage (second pin) |
| Pino 48 | REFB — Bottom reference voltage (second pin) |
Aplicações típicas
TSA1204IFT é adequado para 7 aplicaçãos: Dual-Channel Digital Oscilloscope, Communications IF Sampling, Ultrasound Imaging Front-End, Industrial Data Acquisition Systems, Radar and Lidar Signal Processing, Video and Imaging Digitization, Test and Measurement Instrumentation.
Dual-Channel Digital Oscilloscope
The TSA1204IFT suits dual-channel digital oscilloscope front-ends where two synchronized 12-bit samples per conversion cycle are needed. With 20 MSPS per channel, 1 GHz analog input bandwidth, and 11.2-bit ENOB at Nyquist, the part captures repetitive and single-shot waveforms across the oscilloscope's vertical bandwidth without aliasing. The independent 2.5 V/3.3 V CMOS output supply lets the ADC drive an FPGA capture buffer directly, eliminating level-shift translators and saving PCB area. Adaptive power scaling at lower time-base settings reduces dissipation during long-acquisition runs.
Recomendado
Communications IF Sampling
The TSA1204IFT is well-matched to intermediate-frequency (IF) sampling in software-defined radio and digital receivers. The dual channels allow simultaneous I/Q baseband capture or two diversity branches, while the 1 GHz analog input bandwidth comfortably covers IF stages up to several hundred MHz. ENOB of 11.2 bits at Nyquist preserves modulation fidelity for QAM and OFDM demodulation, and the 0.25 um CMOS pipeline architecture delivers low latency suitable for real-time signal processing. The 2.5 V analog supply keeps power dissipation in densely populated receiver boards manageable.
Recomendado
Ultrasound Imaging Front-End
Medical ultrasound beamformers need many synchronized analog channels digitized at moderate rates - a use case that fits the TSA1204IFT's dual-channel 20 MSPS architecture. The 12-bit resolution and -81.5 dBc SFDR preserve the dynamic range required for low-contrast tissue imaging, while the 1 GHz analog input bandwidth handles the broadband piezoelectric transducer signals. Adaptive power scaling at lower frame rates cuts system heat in portable cart-based systems. Two channels per package lower BOM cost compared with discrete single-channel ADCs.
Recomendado
Industrial Data Acquisition Systems
Multi-channel industrial data acquisition modules use the TSA1204IFT to digitize sensor arrays at 20 MSPS aggregate. The dual-channel pipelined design lets one IC service two sensor channels - vibration and temperature-conditioned transducers, for example - while preserving channel-to-channel synchronization critical for phase analysis. The integrated Track-and-Hold eliminates external sample-and-hold circuits, and the 2.5 V analog supply interfaces directly to industrial 3.3 V sensor front-ends. Extended industrial temperature grade supports factory-floor deployment.
Recomendado
Radar and Lidar Signal Processing
Automotive and industrial radar/lidar front-ends demand dual-channel moderate-speed ADCs to capture return signals from two antenna or photodiode channels simultaneously. The TSA1204IFT's 20 MSPS rate and 1 GHz input bandwidth suit short-range FMCW radar and pulsed lidar receivers where signal bandwidth rarely exceeds a few hundred MHz. The 11.2-bit ENOB provides sufficient amplitude resolution for target classification, and the 48-TQFP package exposes the thermal pad to ground copper for stable performance in enclosed sensor housings.
Recomendado
Video and Imaging Digitization
Broadcast and pro-video digitizing equipment benefits from the TSA1204IFT's dual-channel 20 MSPS rate when capturing component video or two synchronized SDI streams at lower resolutions. The 12-bit resolution captures professional-grade color depth, and the -81.5 dBc SFDR prevents visible artifacts from spurious tones in chroma channels. Independent 2.5 V/3.3 V CMOS output levels interface directly to FPGA fabric used for scaling and color-space conversion. Adaptive power scaling helps when the equipment idles between active captures.
Recomendado
Test and Measurement Instrumentation
Bench instruments such as spectrum analyzers, arbitrary waveform generators with feedback paths, and modular data acquisition cards use the TSA1204IFT for its dual-channel synchronization. The 1 GHz analog bandwidth preserves fast edges in measurement feedback loops, while the 11.2-bit ENOB at Nyquist supports accurate amplitude measurements across the instrument's frequency span. The 48-TQFP package with exposed pad provides reliable thermal performance in densely populated instrument mainboards, where many ADCs sit near heat-generating analog front-ends.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TSA1204IFT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TSA1204IPT | TSA1204IPFT | TSA1204IPFTR | TSA1204IFT-E |
|---|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 20 MSPS | 20 MSPS | 20 MSPS | 20 MSPS | 20 MSPS |
| Channels | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) |
| ENOB at Nyquist | 11.2 bit | 11.2 bit | 11.2 bit | 11.2 bit | 11.2 bit |
| SFDR at Nyquist | -81.5 dBc | -81.5 dBc | -81.5 dBc | -81.5 dBc | -81.5 dBc |
| Analog Supply | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Output Logic | 2.5 V / 3.3 V CMOS | 2.5 V / 3.3 V CMOS | 2.5 V / 3.3 V CMOS | 2.5 V / 3.3 V CMOS | 2.5 V / 3.3 V CMOS |
Principais diferenciais
- True 20 MSPS dual-channel simultaneous sampling in 48-TQFP (vs MAX1306ECM+T (12-channel) and TLV2545IDGKR (slow 12-bit SAR))
- 1 GHz analog input bandwidth for IF undersampling (vs TLV2545IDGKR (1.5 MHz input bandwidth))
- Pin-selectable 2.5 V / 3.3 V CMOS output supply (vs MAX197BEWI (5 V analog / parallel))
- Adaptive power scaling from 0.5 MSPS to 20 MSPS (vs THS1040CPWRG4 (fixed-power 40 MSPS))
Notas de projeto
Use a four-layer PCB with split analog and digital ground planes joined only under the TSA1204IFT exposed pad. Route analog input traces as 50 ohm differential pairs (INA/INTA and INB/INTB) and keep digital output buses (D0A-D11A, D0B-D11B) routed on the opposite side to avoid coupling noise into the analog front-end. Place 100 nF X7R ceramic bypass capacitors within 2 mm of every AVDD and OVDD pin, with a single 10 uF tantalum or ceramic bulk capacitor at the supply entry point.
Drive AVDD with a low-noise LDO such as the TPS7A4701 from a clean 5 V rail, since the 1 GHz analog input bandwidth makes the part sensitive to supply noise that couples into the input stage. The independent OVDD can be driven from a separate 3.3 V rail if interfacing to a 3.3 V FPGA. Add a small ferrite bead between AVDD and OVDD pins to suppress digital switching noise from coupling into the analog supply. Total power dissipation is 120 mW at 20 MSPS - no heatsink required.
The TSA1204IFT output bus switches 24 CMOS lines on every clock edge at 20 MSPS, creating fast edge rates that radiate. Source-terminate each output with a 33 ohm series resistor close to the ADC pin to damp reflections on the transmission-line path to the FPGA. Match CLK/CLKT trace lengths within 1 mm to preserve duty cycle at the ADC clock input. Place a clock buffer near the ADC if the FPGA clock output drives more than two ADC clock pins to avoid excessive loading.
Do not leave REFT and REFB floating - they must be decoupled with 100 nF capacitors to AGND to stabilize the internal reference ladder. Avoid driving the analog inputs beyond the absolute maximum rating of AVDD + 0.3 V; AC-couple or clamp the inputs if the upstream signal exceeds this range. The exposed thermal pad must be soldered to the ground plane for both thermal dissipation and electrical reference - skipping this pad connection degrades linearity.
Informações de conformidade
RoHS and lead-free status confirmed from ST product family information; AEC-Q100 not applicable for this commercial/industrial-grade part.
