TLV1544CD - 10-Bit 85 kSPS 4-Channel SAR ADC | TI
MPN： TLV1544CD ✓ 啟用中TLV1544CD 概覽
An SAR ADC is a type of analog-to-digital converter that compares an input voltage with an internally generated DAC through a sequence of binary trials. Unlike a flash or pipeline ADC, a SAR converter generally requires less circuit area and power while providing adequate speed and resolution for low-cost embedded measurement systems. The TLV1544 belongs to the ADC category within the broader data-acquisition and signal-conversion semiconductor hierarchy.
Key features include 10-bit resolution, four analog input channels, an 85 kSPS conversion rate, and CMOS construction. The serial interface reduces the number of signal paths required between the converter and a digital processor compared with a parallel-output ADC. Programmable power and power-down functions can reduce consumption when continuous conversion is unnecessary, while the programmable conversion-rate capability supports systems that trade throughput for operating efficiency.
The TLV1544 and TLV1548 are implemented as CMOS switched-capacitor SAR converters. The TLV1544 provides four channels, while the TLV1548 provides eight. Its serial interface can connect directly to a four-wire synchronous SPI port, and the manufacturer explicitly identifies TMS320 DSP compatibility. These characteristics make the converter suitable for host-controlled acquisition systems requiring flexible sampling rather than maximum data throughput.
Typical applications include industrial process monitoring, portable instrumentation, battery-powered sensor acquisition, digital potentiometer feedback, and general embedded control systems. Four analog channels allow several sensors or divided voltages to share one converter when the required sampling rate is modest. At 85 kSPS, the device is more appropriate for slow-changing process and instrumentation signals than for high-bandwidth waveform capture.
Designers should account for input settling time, reference accuracy, source impedance, and digital-interface timing. The datasheet's typical application information should guide input-channel selection and capacitor placement. Because the converter is sampled rather than continuously tracking, source settling around each conversion can affect accuracy when multiplexed inputs or high-impedance sensors are used.
This product page consolidates verified manufacturer and distributor information, package details, interface characteristics, drop-in ordering alternatives, and practical design guidance. It distinguishes confirmed TLV1544CD facts from parameters that still require verification against the manufacturer datasheet.
直接替換替代品，適用於 TLV1544CD — 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。
TLV1544ID
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →TLV1544CDG4
✅ 直接替換📋 參考替代品（不在目錄中）
TLV1544CD 最大額定值與電氣特性
| 解析度 | 10 bit |
| Conversion Rate | 85 kSPS |
| Analog Input Channels | 4 channels |
| Architecture | Successive-approximation SAR |
| Technology | CMOS switched-capacitor |
| Output Interface | 4-wire synchronous serial |
| Protocol Compatibility | SPI and TMS320 DSP compatible |
| Interface Signals | CS, I/O CLK, DATA IN, and DATA OUT |
| Programmable Functions | Power, power-down, and conversion rate |
| 封裝 | 16-pin SOIC (D) |
| Package Family | SOIC-16 surface-mount package |
| Terminal Count | 16 terminals |
| 安裝類型 | Surface mount |
| Temperature Grade | Commercial |
TLV1544CD soic-16 surface-mount package 腳位配置指南
TLV1544CD（soic-16 surface-mount package 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： TLV1544CD.
請參閱 資料表 以查看完整腳位配置。
典型應用
TLV1544CD 適用於 6 應用s: Industrial Process Monitoring, Portable Sensor Acquisition, Digital Potentiometer Feedback, Battery-Powered Environmental Monitoring, Embedded Control and Instrumentation, TMS320-Based Data Acquisition.
Industrial Process Monitoring
The TLV1544CD fits industrial process monitoring where several relatively slow sensor or divided-voltage signals must be digitized by a common controller. Its four analog inputs allow shared sequential acquisition, while 10-bit resolution provides 1,024 discrete codes and the confirmed 85 kSPS rate supports responsive monitoring. The SPI-compatible serial interface can reduce wiring compared with a parallel ADC. The principal design consideration is source settling: high-impedance sensors may require buffers or longer acquisition intervals, and supply, reference, and input-range details must be verified in the manufacturer datasheet.
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Portable Sensor Acquisition
The TLV1544CD is suitable for portable instrumentation that gathers four analog sensor channels and transfers results to a low-power embedded processor. Programmable power-down and conversion-rate functions can help manage operating time, while the synchronous SPI-compatible interface supports compact embedded designs. Its 85 kSPS throughput is suitable for sensors whose values change on millisecond or slower timescales rather than high-rate motion waveforms. Battery-powered implementations must additionally verify supply-voltage limits, leakage current, reference behavior, and the available total error before setting the converter’s power mode.
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Digital Potentiometer Feedback
The TLV1544CD can digitize a wiper or feedback voltage from a digital potentiometer in control and calibration systems. Four channels allow several feedback points to share one converter when multiplexing is acceptable, and 10-bit resolution provides useful positioning granularity for many resistive-control applications. The synchronous serial output connects readily to a TMS320 or SPI-capable controller. For accurate measurement, the analog source must settle before sampling, the reference voltage must remain stable, and the application should account for the converter’s unverified input range and acquisition requirements.
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Battery-Powered Environmental Monitoring
The TLV1544CD applies to battery-powered environmental monitoring when temperature, light, and other slowly changing sensor outputs must be measured. Four channels can consolidate several inputs, and programmable power and power-down functions support duty-cycled acquisition. The 85 kSPS rate is ample for many environmental measurements and avoids the power and complexity associated with much faster converters. However, total sensor-node energy use depends on the host wake-up cycle, standby current, external reference, and input-conditioning network, none of which can be quantified from the supplied excerpts.
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Embedded Control and Instrumentation
The TLV1544CD supports embedded control and instrumentation systems that need compact, multiplexed analog measurement without a parallel data bus. Its four-wire synchronous interface allows a processor to control sampling and receive conversion results through shared clock and data signals. The confirmed 85 kSPS throughput is well matched to temperature, pressure, supply, and position feedback that change relatively slowly. To obtain useful accuracy, the design should establish an appropriate input range and reference, control source impedance, and observe the datasheet’s acquisition timing rather than treating the maximum sample rate as suitable for every signal.
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TMS320-Based Data Acquisition
The TLV1544CD fits a TMS320-based acquisition system because the manufacturer identifies direct TMS320 DSP compatibility and provides chip-select, input/output clock, data-input, and data-output signals. Four analog channels and 10-bit resolution are useful for control feedback, instrumentation, and general-purpose digital monitoring, while 85 kSPS supports moderate signal bandwidth. Interface implementation must preserve the specified clock and data timing. The system should also verify voltage compatibility, required conversion latency, and whether the selected DSP supports the converter’s serial configuration without software or hardware adaptation.
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推薦產品摘要
工程參考資料，適用於 TLV1544CD — 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 | TLV1544ID | TLV1544CDG4 |
|---|---|---|---|
| Package | SOIC-16 (D) | SOIC-16 (D) - same package, verify terminal table | SOIC-16 (D) - same package, verify ordering details |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 10 bit | 10 bit | 10 bit |
| Conversion Rate | 85 kSPS | 85 kSPS | 85 kSPS |
| Analog Input Channels | 4 channels | 4 channels | 4 channels |
| Architecture | Switched-capacitor SAR | Switched-capacitor SAR | Switched-capacitor SAR |
| Serial Interface | 4-wire synchronous serial | 4-wire synchronous serial | 4-wire synchronous serial |
| Power Control | Programmable power, power-down, and conversion rate | Programmable power, power-down, and conversion rate | Programmable power, power-down, and conversion rate |
主要差異化特點
- Four-channel acquisition in a 16-pin serial-interface package (對比TLV1548 family)
- Directly identified TMS320 compatibility (對比TLV1544CDG4)
- Programmable operating control (對比TLV1544ID)
設計說明
Treat the four analog inputs as sampled rather than continuously tracking nodes. Confirm the acquisition time, input-capacitance requirements, and maximum source impedance in the manufacturer datasheet before multiplexing a sensor or divider network. This is particularly important when several inputs share one converter: the selected channel must be allowed to settle before its conversion begins, or the measured code may reflect residual charge from the preceding channel.
Place the reference and input-network components close to the TLV1544CD and keep sensitive analog traces away from the I/O CLK and DATA OUT traces. Use a compact ground-return path and follow the datasheet’s recommended decoupling arrangement. Because the provided excerpts do not specify capacitor values or a reference topology, those details must be taken from the manufacturer application guidance rather than inferred from generic ADC layouts.
Do not substitute the TLV1548 merely because it is a related 10-bit, 85 kSPS family member: the TLV1548 has eight channels and therefore is not a pin-compatible replacement for the four-channel TLV1544CD. Likewise, confirm the complete SOIC-16 terminal table for TLV1544ID and TLV1544CDG4 before reuse. An identical ordering family does not eliminate the need to check power pins, reference connections, interface timing, and temperature-grade limits.
Use the programmable power and power-down controls to match converter activity to the acquisition workload, but calculate the resulting system power only after obtaining the supply current, shutdown current, reference current, and conversion-rate tables from the manufacturer datasheet. The confirmed 85 kSPS maximum is not a universal operating requirement. Duty-cycling the host and converter around slowly changing sensors can reduce energy use, provided the power rails remain within the verified operating range.
合規資訊
The supplied verified excerpts identify a commercial-grade TI ADC but do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields therefore remain unknown rather than being inferred from general manufacturer practices.