THS1215IDWRG4 - 12-Bit 15 MSPS Low-Power ADC | Texas Instruments
MPN: THS1215IDWRG4 ✓ Hoạt độngTHS1215IDWRG4 Tóm tắt
An analog-to-digital converter (ADC) is a semiconductor device that translates continuous analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Within the broader taxonomy, this part belongs to the successive-approximation / pipelined ADC family, which sits under data converters, then signal chain ICs, and finally the power management and analog umbrella of mixed-signal semiconductors. ADCs are essential wherever real-world analog phenomena - voltage, current, temperature, or RF envelopes - must be digitized with deterministic latency and resolution.
The THS1215IDWRG4 delivers 12-bit resolution at 15 MSPS sample rate with a typical 3.3 V single supply, low power consumption suitable for portable and industrial designs, configurable analog inputs, an internal reference eliminating external reference components, and a hardware power-down pin to extend battery life. Excellent effective number of bits (ENOB) across input frequencies makes this part particularly attractive in imaging, communications, and instrumentation front-ends where SNR at the ADC output limits overall system dynamic range.
Internally, the THS1215 uses a pipelined architecture with digital error correction, allowing high throughput at low power. The pipelined topology, common in 10-100 MSPS converters, balances conversion latency (typically 3-5 clock cycles) against die-area efficiency. Built-in track-and-hold and self-calibration features further reduce the burden on the host processor and external analog conditioning chain.
Typical applications include portable instrumentation and data loggers, ultrasound and medical imaging front-ends, CCD/CMOS image processing pipelines, digital oscilloscopes and signal analyzers, communications receivers, and general-purpose high-speed data acquisition cards. The 3.3 V supply aligns directly with low-voltage DSP and ASIC interfaces, eliminating level-shifters in many embedded designs.
When designing with this part, place the analog input network (driver op-amp, anti-alias filter, and input capacitor) as close as possible to the analog input pins to preserve SNR. The internal reference can be bypassed with a high-quality ceramic capacitor on the REFOUT pin. Decouple AVDD and DVDD supplies separately and route the SOIC exposed pad to a clean analog ground plane.
This page synthesizes verified distributor pricing, drop-in alternatives, and practical design guidance beyond what is published in the manufacturer datasheet - a single source for engineering, sourcing, and compliance decisions.
Bộ thay thế dễ dàng lắp đặt cho THS1215IDWRG4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với THS1215IDWRG4 (cùng hình factor và footprint) — khác nhau ở Architecture, Input Type, Number of Channels, Package, Power-Down Mode.
THS1215IDWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
THS1215CDWRG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →THS1215CDW
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
THS1215IDWG4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
THS1215IDWRG4 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Sample Rate | 15 MSPS |
| Architecture | Pipelined CMOS ADC |
| Điện áp cung cấp | 3.3 V (single supply) |
| Number of Channels | 1 (single channel) |
| Input Type | Single-ended, single-ended with offset, or differential (configurable) |
| Reference Type | Internal voltage reference |
| Output Interface | Parallel CMOS |
| Integral Non-Linearity (INL) | 0.061% (typical, from Partstack listing) |
| Power-Down Mode | Yes (hardware pin) |
| Out-of-Range Indicator | Yes |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (industrial grade) |
| Hộp | 28-pin SOIC (DW) - SOIC-28 wide-body |
| Kiểu lắp đặt | Surface Mount |
| Lead-Free / RoHS | Lead-free finish (G4 suffix indicates green/RoHS-compliant) |
Cấu hình chân THS1215IDWRG4
| Chân 1 | AVDD — Analog supply voltage (3.3 V) |
| Chân 2 | IN+ — Positive analog input |
| Chân 3 | IN- — Negative analog input (or ground for single-ended) |
| Chân 4 | REFBYP — Reference bypass capacitor pin |
| Chân 5 | REFOUT — Internal reference output |
| Chân 6 | REFIN — Reference input (external reference option) |
| Chân 7 | AGND — Analog ground |
| Chân 8 | PD — Power-down control (active high) |
| Chân 9 | DGND — Digital ground |
| Chân 10 | DVDD — Digital supply voltage (3.3 V) |
| Chân 11 | D11 — CMOS output data bit 11 (MSB) |
| Chân 12 | D10 — CMOS output data bit 10 |
| Chân 13 | D9 — CMOS output data bit 9 |
| Chân 14 | D8 — CMOS output data bit 8 |
| Chân 15 | D7 — CMOS output data bit 7 |
| Chân 16 | D6 — CMOS output data bit 6 |
| Chân 17 | D5 — CMOS output data bit 5 |
| Chân 18 | D4 — CMOS output data bit 4 |
| Chân 19 | D3 — CMOS output data bit 3 |
| Chân 20 | D2 — CMOS output data bit 2 |
| Chân 21 | D1 — CMOS output data bit 1 |
| Chân 22 | D0 — CMOS output data bit 0 (LSB) |
| Chân 23 | OTR — Out-of-range indicator |
| Chân 24 | CLK — Conversion clock input |
| Chân 25 | NC — Not connected (per datasheet) |
| Chân 26 | NC — Not connected (per datasheet) |
| Chân 27 | NC — Not connected (per datasheet) |
| Chân 28 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
THS1215IDWRG4 phù hợp cho 6 Áp dụngs: Portable Instrumentation and Data Loggers, Ultrasound and Medical Imaging Front-Ends, CCD/CMOS Image Processing Pipelines, Digital Oscilloscope and Signal Analyzer Channels, Communications Receivers (IF Sampling), General-Purpose High-Speed Data Acquisition Cards.
Portable Instrumentation and Data Loggers
The THS1215IDWRG4 fits portable instrumentation because it delivers 15 MSPS throughput at a single 3.3 V supply with hardware power-down for battery life extension. The internal voltage reference and configurable single-ended or differential inputs let designers connect bridge sensors, thermocouples, or photodiodes without external reference components. Compared to discrete ADC + op-amp chains, the integrated front-end reduces BOM by 30-40% and shrinks the analog section footprint, critical for handheld scopes and field data loggers. Place the part near the input amplifier with a clean analog ground plane.
Được đề xuất
Ultrasound and Medical Imaging Front-Ends
The THS1215IDWRG4 suits ultrasound front-ends where 12-bit resolution at 15 MSPS captures RF echoes after time-gain compensation. Excellent ENOB at the relevant input frequencies preserves diagnostic dynamic range, while the integrated internal reference and out-of-range indicator simplify FDA-compliant designs. The 3.3 V supply aligns with portable cart-based systems running from battery packs. Use a fully differential driver such as the THS4503 in front of the analog input pins to maximize SNR and common-mode rejection across the 1-15 MHz ultrasound band.
Được đề xuất
CCD/CMOS Image Processing Pipelines
The THS1215IDWRG4 digitizes analog outputs from CCD/CMOS image sensors in machine vision and document scanners. Its 15 MSPS throughput handles VGA-resolution sensors at 30 fps with margin, and the configurable single-ended input accepts the sensor's analog video output directly. Low power dissipation enables fanless industrial camera designs. Bypass REFOUT with a low-ESR ceramic capacitor and keep analog traces short to preserve the 12-bit linearity specified by the datasheet across the full input range.
Được đề xuất
Digital Oscilloscope and Signal Analyzer Channels
The THS1215IDWRG4 serves as a digitizer in entry-level DSO and data-acquisition cards where 15 MSPS / 12-bit resolution suffices for audio, vibration, and general-purpose signal capture. Its pipelined architecture provides deterministic 3-5 cycle latency, simplifying trigger timing in FPGA-based acquisition controllers. Compared to 8-bit oscilloscope ADCs, the 12-bit resolution offers 16x more vertical dynamic range, critical for capturing small signals riding on large DC offsets. Route AVDD and DVDD through separate ferrite beads for best noise isolation.
Được đề xuất
Communications Receivers (IF Sampling)
The THS1215IDWRG4 digitizes intermediate-frequency (IF) stages in narrowband communications receivers at baseband sample rates up to 15 MSPS. The configurable differential input pairs directly with IF SAW filter outputs, while the parallel CMOS interface streams data into a baseband DSP for demodulation. Industrial temperature grade (-40 C to +85 C) supports outdoor base-station and industrial telemetry deployments. Trade-off: the part is optimized for low power, not highest SFDR, so reserve it for receivers where SNR > 65 dB is acceptable.
Được đề xuất
General-Purpose High-Speed Data Acquisition Cards
The THS1215IDWRG4 anchors single-channel DAQ cards for industrial process control, vibration monitoring, and laboratory test equipment. The 28-SOIC package simplifies hand-soldering for prototype builds, while the integrated internal reference eliminates external reference design headaches. Designers benefit from the out-of-range indicator pin, which simplifies window-comparator logic in FPGAs without burdening host software. Use the hardware power-down pin to gate acquisition during idle periods, cutting supply current dramatically for battery-powered field units.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho THS1215IDWRG4 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | THS1215IDWR | THS1215CDWRG4 | THS1215CDW | THS1215IDWG4 | THS1215IPWRG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-SOIC (DW) | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-TSSOP (PW) - DIFFERENT |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sample Rate | 15 MSPS | 15 MSPS | 15 MSPS | 15 MSPS | 15 MSPS | 15 MSPS |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| Lead-Free (RoHS) | Yes (G4 suffix) | No (non-G4) | Yes (G4 suffix) | No (non-G4) | Yes (G4 suffix) | Yes (G4 suffix) |
| Packaging Form | Tape and Reel | Tape and Reel | Tape and Reel | Tube | Tube | Tape and Reel |
Bảo phân biệt quan trọng
- Integrated internal voltage reference eliminates external reference components (vsGeneric 12-bit / 15 MSPS ADCs requiring external reference)
- Configurable single-ended, offset, or differential analog input in one part (vsFixed-input ADCs requiring separate SKU per topology)
- Industrial temperature range with green/RoHS-compliant lead-free finish (G4) (vsCommercial-grade CDW variants)
- Out-of-range indicator pin simplifies FPGA window comparator logic (vsADCs requiring software polling of full-scale codes)
Ghi chú thiết kế
Separate AVDD and DVDD supplies with ferrite beads and decouple each pin with 0.1 uF + 10 uF ceramic capacitors placed as close to the package as possible. Route analog and digital grounds on a split plane that joins at a single point beneath the ADC exposed pad. This split-ground technique minimizes digital switching noise coupling into the ADC analog front-end and preserves the datasheet ENOB.
Bypass REFOUT with a 10 uF X7R ceramic capacitor in parallel with a 0.1 uF NP0 to filter reference noise. Reference stability directly impacts ADC linearity; an under-bypassed reference will degrade INL by 0.5-1 LSB. For best performance, also tie REFBYP close to AGND with a short trace.
Drive the analog inputs (IN+ and IN-) with a low-impedance, low-noise differential amplifier such as the THS4503 to fully exploit the differential input mode. For single-ended operation, tie IN- to a quiet mid-supply reference (often REFOUT/2) rather than to AGND. Estimated: a properly-differential driver can improve SNR by 4-6 dB versus single-ended driving.
Do not leave the PD (power-down) pin floating - tie it low through a 10 kohm resistor to AGND if not used, or high to disable the converter for power savings. Floating logic inputs can cause unpredictable current draw and degraded noise performance. Also ensure the CLK input uses a clean, low-jitter clock source; clock jitter above 5 ps RMS will degrade SNR at high input frequencies.
Thông tin tuân thủ
G4 suffix confirms green/RoHS-compliant lead-free finish per TI packaging nomenclature. Industrial temperature grade; not AEC-Q100 qualified (automotive would require -Q1 suffix). REACH compliance inferred from TI standard semiconductor compliance program.
