TLV2545ID - 12-Bit 200 kSPS Serial ADC | Texas Instruments
MPN： TLV2545ID ✓ 啟用中TLV2545ID 概覽
An ADC is a data-acquisition semiconductor that converts an analog voltage into a numeric code for processing, storage, or transmission. The TLV2545 belongs to the ADC and DAC category, using the successive-approximation-register architecture to balance conversion speed, energy use, and implementation complexity. Its single pseudo-differential input arrangement supports measurement of one analog channel against a selectable reference-side connection, while the serial interface reduces the number of signals required when connecting the converter to a microcontroller, DSP, or programmable logic device.
The TLV2545ID provides 12-bit conversion resolution, 200 kSPS maximum throughput, and operation from 2.7 V to 5.5 V. Its built-in conversion clock eliminates the need for an external timing source during ordinary sampling. Published family specifications also identify a 140 kSPS version within the TLV254x family, plus integrated and differential nonlinearity limits of ±1 LSB maximum, a signal-to-noise-plus-distortion ratio of 72 dB, and a spurious-free dynamic range of 85 dB. The serial output is described as SPI/DSP-compatible and compatible with TMS320 systems operating up to 10 MHz.
The TLV2545ID is designed for low-power, mixed-signal systems. Its serial interface allows the analog input, digital interface, and supply references to be placed close to the sensor or signal source, which can reduce board area and simplify routing. The 8-pin SOIC package is also available in a more compact surface-mount footprint than a through-hole package, making the device practical for compact control and measurement equipment. Designers should still observe the datasheet limits for input range, reference voltage, acquisition time, clock timing, and supply sequencing.
Typical uses include industrial sensor interfaces, battery-powered portable instruments, audio and control signal monitoring, and data acquisition front ends feeding a TMS320-compatible processor. The 200 kSPS throughput supports substantially faster sampling than many general-purpose low-speed ADCs, while the 12-bit code width provides 4096 quantization levels. In each application, the analog source, reference arrangement, and digital interface must be evaluated together because conversion accuracy depends on the complete signal chain, not only the converter itself.
The principal design consideration is preserving the ADC's dynamic performance through careful reference and layout choices. Input and reference paths should be short, quiet, and appropriately decoupled according to the manufacturer datasheet, while the digital clock and serial data lines should be routed to limit coupling into the analog input. This page combines the verified manufacturer and distributor information with practical application guidance, alternative-selection constraints, and design notes that help distinguish the TLV2545ID from broader functional equivalents that are not necessarily pin-compatible.
直接替換替代品，適用於 TLV2545ID — 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。
TLV2545QD
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TLV2545ID 最大額定值與電氣特性
| Converter Type | 12-bit SAR analog-to-digital converter |
| Architecture | Successive-approximation register (SAR) |
| Number of Channels | 1 channel |
| Input Configuration | Single pseudo-differential input |
| Maximum Throughput | 200 kSPS |
| Family Throughput Option | 140 kSPS |
| 解析度 | 12 bit |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Output Interface | Serial output |
| Serial Interface Compatibility | SPI/DSP-compatible |
| TMS320 Interface Clock | Up to 10 MHz |
| Integrated Conversion Clock | Yes |
| Integral Nonlinearity | ±1 LSB maximum |
| Differential Nonlinearity | ±1 LSB maximum |
| Signal-to-Noise Plus Distortion | 72 dB |
| Spurious-Free Dynamic Range | 85 dB |
| Chip Select | Yes |
| 封裝 | 8-pin SOIC (D) |
| 安裝類型 | Surface Mount |
TLV2545ID 8-pin soic (d) 腳位配置指南
TLV2545ID（8-pin soic (d) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： TLV2545ID.
請參閱 資料表 以查看完整腳位配置。
典型應用
TLV2545ID 適用於 6 應用s: Industrial Sensor Acquisition, Battery-Powered Portable Instruments, DSP Interface Data Acquisition, Audio and Control Signal Monitoring, Battery Management Monitoring, Programmable Logic Sensor Interface.
Industrial Sensor Acquisition
The TLV2545ID fits industrial sensor front ends that require 12-bit conversion resolution and a sampling rate up to 200 kSPS. According to the Texas Instruments TLV2545 datasheet, the converter operates from 2.7 V to 5.5 V and includes a built-in conversion clock, allowing the acquisition node to avoid a separate clock circuit. Its serial output is SPI/DSP-compatible, so a microcontroller or DSP can retrieve each conversion over a compact bus rather than a multi-bit parallel interface. The 8-pin SOIC (D) package also keeps the converter compact enough for measurement boards with limited connector space. In implementation, match the sensor output to the ADC input range, use a quiet reference arrangement, and place the converter close to the analog source. The practical benefit is a faster, lower-pin-count acquisition path, although system accuracy still depends on reference quality, source impedance, acquisition timing, and PCB layout.
推薦
Battery-Powered Portable Instruments
The TLV2545ID is appropriate for portable measurement instruments where converter size, supply flexibility, and digital-interface overhead matter. The Texas Instruments TLV2545 datasheet specifies a 2.7 V to 5.5 V operating range, allowing the ADC to operate directly from common low-energy rails without requiring a higher fixed supply. Its 12-bit resolution produces 4096 quantization levels, while the maximum 200 kSPS rate supports fast measurements without adopting a much larger high-speed converter package. The serial interface reduces connection count to the host processor and can support low-power design practices when conversions are acquired selectively. Its built-in conversion clock simplifies timing compared with systems that require an external ADC clock. The main design trade-off is that overall instrument accuracy depends on battery-rail quality, reference stability, sensor excitation, and whether the sampling rate actually consumes more energy than the application requires.
推薦
DSP Interface Data Acquisition
The TLV2545ID is well suited to digital signal processor front ends because its serial interface is described by Texas Instruments as SPI/DSP-compatible and TMS320-compatible up to 10 MHz. The converter provides 12-bit data at up to 200 kSPS while requiring substantially fewer interconnect signals than a parallel ADC. This allows the processor to receive samples using its existing serial peripheral and leaves more board area for computation, memory, and signal conditioning. The built-in conversion clock removes the need for a separate ADC timing source in basic acquisition designs. When implementing the connection, verify serial clock polarity, chip-select behavior, conversion timing, and data-capture latency against both the TLV2545 and processor datasheets. The measurable benefit is reduced pin and routing demand while retaining enough throughput for monitoring, vibration analysis, control feedback, and other embedded waveform tasks.
推薦
Audio and Control Signal Monitoring
The TLV2545ID can be used for audio-level, waveform, and control-signal monitoring when a 12-bit measurement and a maximum 200 kSPS sampling rate are sufficient. According to the Texas Instruments TLV2545 datasheet, family performance figures include 72 dB SINAD and 85 dB SFDR, providing useful figures when evaluating a signal chain. Its serial output supports a compact connection to a digital controller, and the 2.7 V to 5.5 V supply range can simplify system partitioning around common logic rails. The ADC should be placed near the monitored node to minimize analog trace length and susceptibility to digital coupling. Designers must also select appropriate anti-alias filtering and account for acquisition time before asserting that the 200 kSPS maximum rate is usable for the intended waveform. This application benefits from a small converter footprint, but it does not replace a dedicated audio codec when microphone input, automatic gain control, or specialized audio formatting is required.
推薦
Battery Management Monitoring
The TLV2545ID can monitor battery-derived analog signals where 12-bit resolution and rapid sequential sampling are useful for pack diagnostics or current-sense measurements. The Texas Instruments TLV2545 datasheet confirms operation from 2.7 V to 5.5 V, permitting use in systems whose protected measurement rail lies within that range. A maximum throughput of 200 kSPS gives the controller enough temporal resolution for many monitoring tasks, while the serial interface reduces the number of connections needed between the measurement converter and a battery-management controller. The built-in conversion clock simplifies repeated acquisition. For reliable battery applications, the reference must remain independent of noisy switching converters, the input must stay within the permitted common-mode and absolute-voltage range, and the PCB layout should keep high-current paths separate from the analog input. The key trade-off is that monitored quantities still require application-specific scaling, filtering, and calibration to achieve useful system accuracy.
推薦
Programmable Logic Sensor Interface
The TLV2545ID is appropriate for compact sensor interfaces built around programmable logic or a small microcontroller. Its 12-bit resolution, up to 200 kSPS throughput, and serial SPI/DSP-compatible interface provide a practical path for capturing analog measurements without allocating a wide parallel bus. According to the Texas Instruments TLV2545 datasheet, the device includes a built-in conversion clock, which can simplify control sequences in FPGA or microcontroller designs. The 2.7 V to 5.5 V operating range also supports common embedded supply levels. Designers should use the official pin configuration to define the serial interface and should account for the converter's acquisition behavior before sampling immediately after changing the source multiplexer. To preserve the available 72 dB family SINAD figure, keep the analog and reference paths short, use a stable reference, and separate serial clock routing from the input node. The advantage is a compact, deterministic acquisition interface with fewer PCB traces than a parallel converter.
推薦
推薦產品摘要
工程參考資料，適用於 TLV2545ID — 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 | TLV2545QD |
|---|---|---|
| Package | 8-pin SOIC (D) | 8-pin SOIC (D) |
| Brand | Texas Instruments | Texas Instruments |
| Resolution | 12 bit | 12 bit |
| Maximum Throughput | 200 kSPS | 200 kSPS |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Architecture | SAR | SAR |
| Input Configuration | Single pseudo-differential | Single pseudo-differential |
| Output Interface | Serial, SPI/DSP-compatible | Serial, SPI/DSP-compatible |
| Built-In Conversion Clock | Yes | Yes |
| TMS320-Compatible Clock | Up to 10 MHz | Up to 10 MHz |
主要差異化特點
- Single-channel 12-bit SAR conversion with integrated clock (對比TLV2545QD)
- Compact 8-pin serial-interface implementation (對比TLV2545QD)
- TMS320-compatible serial operation (對比TLV2545QD)
設計說明
Place the TLV2545ID near the analog source and keep the input and reference traces short and quiet. Route the serial clock and data lines away from the analog input, particularly when the converter operates near its 200 kSPS maximum rate. The manufacturer datasheet identifies the converter as serial and DSP-compatible, but this does not eliminate layout coupling. Use a quiet reference arrangement, follow the published decoupling configuration, and verify acquisition performance with the intended source impedance and analog bandwidth.
Do not assume that any 12-bit serial ADC is a drop-in replacement for the TLV2545ID. A valid substitute must preserve the 8-pin SOIC (D) footprint, power pins, analog input arrangement, reference behavior, chip-select behavior, clocking, and serial data timing. The supplied data identifies the device as a single pseudo-differential 200 kSPS converter with a built-in conversion clock and SPI/DSP-compatible output. Verify those requirements in the official pinout and timing documentation before redesigning or substituting the part.
Treat the analog input and reference paths as high-impedance precision nodes. Keep copper area small enough to reduce parasitic capacitance, avoid unnecessary test pads and long stubs, and provide a low-impedance return path. Because the family publishes 72 dB SINAD and 85 dB SFDR figures, the complete front end must preserve that performance through clean routing, suitable filtering, and a stable reference. Validate the result at the intended sample rate because acquisition timing and source impedance can limit useful bandwidth.
Operate the TLV2545ID only within the verified 2.7 V to 5.5 V supply range and apply the manufacturer's recommended bypass network. The built-in conversion clock does not remove the need for a quiet local supply because reference noise and supply disturbance can affect conversion accuracy. Separate sensitive analog routing from noisy digital activity, avoid sharing long return paths with high-current switching nodes, and confirm the power rail remains within limits during startup, load changes, and system transients.
合規資訊
The supplied manufacturer and distributor search results do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-mineral status. AEC-Q100 is marked not applicable because the TLV2545ID orderable suffix is not identified as an automotive-qualified variant in the supplied data.