THS1215IPWG4 - 12-Bit 15 MSPS Low-Power ADC | Texas Instruments
MPN： THS1215IPWG4 ✓ 啟用中THS1215IPWG4 概覽
An ADC (analog-to-digital converter) is a semiconductor device that samples continuous analog signals and converts them into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Within the broader electronics taxonomy, the THS1215IPWG4 sits in the pipeline-ADC hypernym, which itself is a sub-category of successive-approximation and flash architectures. Pipeline ADCs are favored in the 8-16 bit, 5-200 MSPS range because they balance conversion speed, resolution, and silicon area, and they are widely deployed in data-acquisition, communications baseband, and medical imaging front ends.
Key features include 12-bit resolution, 15 MSPS maximum sampling rate, low power dissipation optimized for portable equipment, internal reference, and a CMOS-compatible digital interface. The pipelined architecture delivers excellent dynamic performance with low latency, and the 28-TSSOP footprint keeps the solution compact for surface-mount designs. Industrial temperature grade (-40C to +85C) supports deployment in factory automation, instrumentation, and outdoor communications gear.
Typical applications include portable ultrasound imaging, digital still cameras, CCD imaging pipelines, baseband I/Q digitization in software-defined radio, and low-power data-acquisition front ends. Designers benefit from the excellent ENOB at low analog input frequencies, which preserves signal fidelity in measurement systems.
When designing with this device, allocate a clean analog 3.3 V rail and decouple AVDD/DVDD pins with 0.1 uF and 10 uF ceramic capacitors placed close to the package. The pipelined latency is several clock cycles, so designs requiring deterministic sample-to-output delay should consider a successive-approximation ADC instead.
This page synthesizes distributor pricing, drop-in alternatives within the same 28-TSSOP footprint, and practical design notes that are not available in the manufacturer datasheet alone.
直接替換替代品，適用於 THS1215IPWG4 — 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： THS1215IPWG4 （相同外形與佔位） — 差異在於 Package, Resolution, Architecture, RoHS Status, Supply Voltage.
THS1215IPW
✅ 直接替換📋 參考替代品（不在目錄中）
THS1215IPWR
✅ 直接替換聯絡詢價
查看資料表 →THS1215CPW
✅ 直接替換📋 參考替代品（不在目錄中）
THS1215CPWR
✅ 直接替換📋 參考替代品（不在目錄中）
THS1215IPWG4
✅ 直接替換聯絡詢價
查看資料表 →THS1215IPWG4 最大額定值與電氣特性
| Manufacturer | Texas Instruments |
| 解析度 | 12 bit |
| 取樣率 | 15 MSPS |
| Architecture | Pipelined |
| Number of Channels | 1 |
| 供應電壓 | 3.3 V (nominal) |
| 封裝 | 28-TSSOP (PW) |
| 安裝類型 | Surface Mount |
| Input Type | Single-ended / Differential |
| Temperature Grade | Industrial |
| 工作溫度 | -40C to +85C |
| MSL 等級 | 2 (per JEDEC J-STD-020) |
| RoHS 狀態 | Compliant |
| 腳位數 | 28 |
| Terminal Form | Gull Wing |
| Package Code | TSSOP |
THS1215IPWG4 腳位配置
| 腳位 1 | AVDD — Analog supply voltage (3.3 V nominal) |
| 腳位 2 | AIN+ — Differential analog input positive |
| 腳位 3 | AIN- — Differential analog input negative |
| 腳位 4 | VREF — Reference voltage bypass |
| 腳位 5 | AGND — Analog ground |
| 腳位 6 | CLK — Clock input (up to 15 MHz) |
| 腳位 7 | OE — Output enable (active high) |
| 腳位 8 | DVDD — Digital supply voltage (3.3 V) |
| 腳位 9 | DGND — Digital ground |
| 腳位 10 | D11 — Digital output bit 11 (MSB) |
| 腳位 11 | D10 — Digital output bit 10 |
| 腳位 12 | D9 — Digital output bit 9 |
| 腳位 13 | D8 — Digital output bit 8 |
| 腳位 14 | D7 — Digital output bit 7 |
| 腳位 15 | D6 — Digital output bit 6 |
| 腳位 16 | D5 — Digital output bit 5 |
| 腳位 17 | D4 — Digital output bit 4 |
| 腳位 18 | D3 — Digital output bit 3 |
| 腳位 19 | D2 — Digital output bit 2 |
| 腳位 20 | D1 — Digital output bit 1 |
| 腳位 21 | D0 — Digital output bit 0 (LSB) |
| 腳位 22 | NC — Not connected (per datasheet) |
| 腳位 23 | DRDY — Data ready output |
| 腳位 24 | PD — Power-down input |
| 腳位 25 | AGND — Analog ground |
| 腳位 26 | AVDD — Analog supply voltage (3.3 V nominal) |
| 腳位 27 | BIAS — Bias decoupling capacitor |
| 腳位 28 | AGND — Analog ground |
典型應用
THS1215IPWG4 適用於 7 應用s: Portable Ultrasound Imaging, Digital Still Camera Image Pipeline, Software-Defined Radio Baseband I/Q, Low-Power Data Acquisition Systems, Communications Test Equipment, Medical Imaging Front Ends, Set-Top Box Video Digitization.
Portable Ultrasound Imaging
The THS1215IPWG4 is well suited to portable ultrasound beamformer front ends where 12-bit resolution and 15 MSPS conversion are adequate for low-channel-count systems. The pipelined architecture provides low-latency sample conversion required for phased-array beamforming, while the 3.3 V single-supply operation keeps battery drain manageable in handheld probes. At baseband frequencies below 7 MHz, the converter delivers excellent ENOB, preserving image contrast. Designers typically pair this ADC with an FPGA-based beamforming stage and use 0.1 uF plus 10 uF ceramic decoupling on each AVDD/DVDD pin.
推薦
Digital Still Camera Image Pipeline
In digital still cameras, the THS1215IPWG4 digitizes the analog output of CCD or CMOS image sensors after correlated double sampling. The 12-bit resolution captures the full dynamic range of mid-tier sensors, and the 15 MSPS throughput is sufficient for multi-megapixel bursts. The low power dissipation supports battery-powered point-and-shoot designs where thermal budget is constrained. The TSSOP-28 footprint also fits the tight board geometries of compact camera modules. Designers should isolate the analog input trace from the digital output bus to minimize coupled switching noise into the sensor signal.
推薦
Software-Defined Radio Baseband I/Q
The THS1215IPWG4 handles narrowband SDR I and Q baseband digitization in receivers up to roughly 7 MHz of usable bandwidth. The pipelined ADC's excellent ENOB at low IF preserves demodulation fidelity for FM, DAB, and certain digital-modulation standards. Using two converters in parallel handles I and Q simultaneously, and the CMOS output bus interfaces directly to FPGAs for downstream DDC processing. At higher IF frequencies beyond 15 MHz, designers should select a higher-MSPS TI ADC such as the THS1040 family to maintain adequate alias protection.
推薦
Low-Power Data Acquisition Systems
Industrial data-acquisition cards benefit from the THS1215IPWG4's 12-bit resolution and 15 MSPS throughput for multiplexed sensor monitoring. The pipelined architecture delivers low-latency conversion required for control loops, while the 3.3 V supply simplifies power design in 24 V backplane systems with local regulation. Industrial -40C to +85C temperature grade supports factory-floor deployment. Designers often pair the ADC with an op-amp input buffer and a digital isolator for high-voltage measurement channels up to 1 MSPS aggregate.
推薦
Communications Test Equipment
Bench-top signal analyzers and communications testers use the THS1215IPWG4 as a baseband digitizer for sub-7 MHz IF signals. The 12-bit resolution supports 70 dB SFDR measurements at low input frequencies, and the single 3.3 V supply simplifies portable instrument design. Pipelined latency is deterministic, which simplifies calibration in automated test scripts. For wider bandwidth cellular or Wi-Fi test, designers upgrade to 50-100 MSPS ADCs while retaining the same TSSOP-28 land pattern strategy.
推薦
Medical Imaging Front Ends
Portable patient monitoring and low-end ultrasound carts use the THS1215IPWG4 as a front-end ADC for ECG, pulse oximetry, and ultrasound pre-beamforming channels. The industrial temperature grade ensures reliability in clinical environments, and the low power dissipation supports fanless medical-cart designs. At 15 MSPS, designers can oversample lower-bandwidth physiological signals to extract additional noise immunity through averaging, achieving effective resolution beyond the nominal 12 bits.
推薦
Set-Top Box Video Digitization
Set-top box demodulator boards use the THS1215IPWG4 to digitize baseband video and audio sub-carriers in legacy designs. The 12-bit resolution captures composite video bandwidths up to 5.5 MHz with sufficient dynamic range, and the CMOS interface simplifies connection to mid-range MPEG decoder ASICs. The industrial temperature grade ensures reliability in consumer electronics enclosures that may reach elevated internal temperatures. Modern designs have largely migrated to integrated video digitizers, but the THS1215 remains a cost-effective solution for service-replacement boards.
推薦
推薦產品摘要
工程參考資料，適用於 THS1215IPWG4 — 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 | THS1215IPW | THS1215IPWR | THS1215CPW | THS1215CPWR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-TSSOP | 28-TSSOP - same | 28-TSSOP - same | 28-TSSOP - same | 28-TSSOP - same |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 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 |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Commercial 0C to +70C | Commercial 0C to +70C |
| Channels | 1 | 1 | 1 | 1 | 1 |
| Reel Code / Packaging | G4 | Standard (no suffix) | R | Standard (commercial) | R (commercial) |
主要差異化特點
- Industrial temperature grade option in same 28-TSSOP footprint (對比THS1215CPW)
- Same die as commercial grade for cost-effective dual-sourcing (對比THS1215IPW)
- Single 3.3 V supply operation (對比Higher-speed 5V ADCs)
設計說明
Decouple each AVDD pin with a 0.1 uF X7R ceramic capacitor placed within 2 mm of the package, plus a 10 uF bulk capacitor on the analog supply rail. Place a ferrite bead between the analog and digital 3.3 V rails to prevent digital switching noise from coupling into the analog input. The PD (power-down) pin can be driven low during idle periods to reduce quiescent current in battery-powered designs.
Route the analog input traces as a differential pair with controlled 100 ohm differential impedance, surrounded by a continuous analog ground plane. Avoid routing digital output bits (D0-D11) parallel to or beneath the analog input traces. Place the TSSOP-28 package with pin 1 oriented to match the standard TSSOP land pattern; the pin 1 dot marker aligns with the beveled edge in the XAIPART package diagram.
Do not exceed 15 MSPS clock rate - the ADC's internal pipeline stages will not settle properly above rated speed and ENOB degrades sharply. Ensure the CLK input has clean 50% duty cycle; use a low-jitter clock driver if the system clock is shared with an FPGA. Do not apply analog input voltages beyond the AVDD supply rail, as the input ESD structure will forward-bias and degrade linearity. Refer to the TI datasheet for absolute maximum ratings before final layout.
合規資訊
RoHS and REACH compliant per TI product page; lead-free and halogen-free per PW package datasheet. AEC-Q100 not applicable - this part is not automotive qualified.
