THS4532 - Dual 0.25mA RRO Fully-Differential Amplifier | TI
MPN： THS4532 ✓ 啟用中THS4532 概覽
A fully-differential amplifier (FDA) is an operational amplifier with differential inputs and differential outputs, providing both the signal and its complement. This architecture inherently rejects common-mode noise and even-order harmonics, making FDAs essential in high-resolution ADC driving, balanced signal transmission, and precision analog front-ends. The THS4532 belongs to the class of low-power FDAs, which are a subset of differential amplifiers, which in turn fall under the broader category of operational amplifiers and linear integrated circuits. Its rail-to-rail output stage maximizes dynamic range in low-voltage systems, while the input common-mode range below the negative rail simplifies single-supply designs.
Key features of the THS4532 include ultra-low power consumption of 0.25mA per channel, rail-to-rail output swing, and an input common-mode range that includes the negative rail. The device also offers a wide supply range of 2.5V to 5.5V, making it compatible with 3.3V and 5V systems. The THS4532 is fully specified for operation over -40°C to +125°C, ensuring reliable performance in industrial environments. Its low power and small footprint make it suitable for high-density multichannel data acquisition systems.
From a technical perspective, the THS4532 uses a precision CMOS architecture that achieves low offset and drift while maintaining ultra-low quiescent current. The differential output stage provides a balanced signal that can directly drive high-resolution SAR ADCs, such as the ADS8887, without the need for an external transformer. The device's common-mode feedback loop allows the user to set the output common-mode voltage independently, which is critical for matching the ADC's input range. The THS4532 also features internal compensation, simplifying the external component count.
Typical applications include driving high-resolution ADCs in portable medical devices, battery-powered industrial sensors, and low-power audio processing. Its low power consumption extends battery life in wearable monitors and wireless sensor nodes. The THS4532 is also used in single-ended to differential conversion for precision measurement systems, where its low noise and high linearity preserve signal integrity.
When designing with the THS4532, ensure proper power supply decoupling with 0.1µF capacitors close to the V+ and V- pins. The output common-mode voltage should be set to the ADC's reference midpoint to maximize dynamic range. For optimal noise performance, use metal-film resistors in the feedback network and keep the feedback paths short.
直接替換替代品，適用於 THS4532 — 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： THS4532 （相同外形與佔位） — 差異在於 Package, Input Voltage Noise, Number of Channels, Slew Rate, Supply Voltage Range.
THS4522IPWR
✅ 直接替換聯絡詢價
查看資料表 →THS4524
✅ 直接替換📋 參考替代品（不在目錄中）
THS4531A
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADA4940-2ACPZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LTC6362
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
THS4532 最大額定值與電氣特性
| Number of Channels | 2 |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Quiescent Current per Channel | 250 µA |
| 輸出類型 | Rail-to-Rail |
| Input Common-Mode Range | Below negative rail |
| 工作溫度範圍 | -40°C to +125°C |
| 封裝 | 16-TSSOP (PW) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
THS4532 腳位配置
| 腳位 1 | OUT- — Inverting differential output |
| 腳位 2 | V- — Negative supply |
| 腳位 3 | IN- — Inverting input |
| 腳位 4 | IN+ — Non-inverting input |
| 腳位 5 | VOCM — Output common-mode voltage control |
| 腳位 6 | V+ — Positive supply |
| 腳位 7 | OUT+ — Non-inverting differential output |
| 腳位 8 | PD — Power-down control (active high) |
| 腳位 9 | OUT+ — Non-inverting differential output (second channel) |
| 腳位 10 | V+ — Positive supply (second channel) |
| 腳位 11 | VOCM — Output common-mode voltage control (second channel) |
| 腳位 12 | IN+ — Non-inverting input (second channel) |
| 腳位 13 | IN- — Inverting input (second channel) |
| 腳位 14 | V- — Negative supply (second channel) |
| 腳位 15 | OUT- — Inverting differential output (second channel) |
| 腳位 16 | PD — Power-down control (second channel) |
典型應用
THS4532 適用於 6 應用s: Portable Medical Devices, Battery-Powered Industrial Sensors, Low-Power Audio Processing, Data Acquisition Systems, Single-Ended to Differential Conversion, Wireless Sensor Nodes.
Portable Medical Devices
The THS4532's ultra-low power consumption of 250µA per channel extends battery life in portable medical monitors and wearable health sensors. Its rail-to-rail output and input common-mode range below the negative rail allow direct interfacing with low-voltage sensors and ADCs. The device's small 16-TSSOP package enables compact PCB designs, and its -40°C to +125°C range ensures reliable operation in body-worn devices. By driving high-resolution ADCs with a fully-differential signal, the THS4532 preserves signal integrity while minimizing power draw, making it ideal for continuous patient monitoring.
推薦
Battery-Powered Industrial Sensors
In industrial wireless sensor nodes, the THS4532 provides low-power differential signal conditioning for strain gauges, thermocouples, and pressure sensors. Its 2.5V to 5.5V supply range matches common battery voltages, and the 250µA per channel quiescent current minimizes power drain. The input common-mode range below the negative rail allows direct connection to ground-referenced sensors. The fully-differential output drives ADCs with improved noise immunity, crucial in electrically noisy industrial environments. The device's extended temperature range supports outdoor and harsh-condition deployments.
推薦
Low-Power Audio Processing
The THS4532 is suitable for low-power audio applications such as portable recorders and hearing aids, where its low noise and distortion preserve audio quality. The fully-differential architecture cancels common-mode noise, improving signal-to-noise ratio in audio paths. With a supply range of 2.5V to 5.5V, it can operate from a single lithium-ion cell. The rail-to-rail output maximizes dynamic range, and the low quiescent current extends playback time. The device can drive audio ADCs or be used in single-ended to differential conversion for balanced audio interfaces.
推薦
Data Acquisition Systems
The THS4532 is designed for low-power data acquisition systems, providing differential drive to high-resolution ADCs. Its ultra-low power consumption allows high channel density without excessive heat dissipation. The input common-mode range below the negative rail simplifies single-supply designs, and the rail-to-rail output maximizes ADC input range. The device's low offset and drift ensure accurate measurements over temperature. It is ideal for multichannel systems in portable instrumentation, where power and space are constrained.
推薦
Single-Ended to Differential Conversion
The THS4532 converts single-ended signals to differential outputs, which is essential for driving ADCs and balanced transmission lines. Its fully-differential architecture provides common-mode rejection, reducing noise pickup. The device's low power consumption makes it suitable for battery-powered sensors. The input common-mode range below the negative rail allows ground-referenced single-ended inputs. The output common-mode voltage can be set independently, enabling interface with ADCs having specific input ranges. This application is common in precision measurement and industrial control.
推薦
Wireless Sensor Nodes
In wireless sensor nodes, the THS4532 conditions signals from various sensors before transmission. Its ultra-low power consumption is critical for battery life, and the small package saves board space. The device operates from 2.5V to 5.5V, compatible with common battery configurations. The rail-to-rail output and differential signaling improve signal integrity over the node's PCB. The extended temperature range supports outdoor deployment. The THS4532 can interface with low-power microcontrollers and radios, making it a key component in IoT devices.
推薦
推薦產品摘要
工程參考資料，適用於 THS4532 — 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 | THS4522 | THS4524 | THS4531A | ADA4940-2 | LTC6362 |
|---|---|---|---|---|---|---|
| Package | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices |
| Number of Channels | 2 | 1 | 4 | 1 | 2 | 2 |
| Supply Voltage Range | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 3V to 5.5V | 2.8V to 5.25V |
| Quiescent Current per Channel | 250 µA | 250 µA | 250 µA | 250 µA | 1.25 mA | 1 mA |
| Rail-to-Rail Output | Yes | Yes | Yes | Yes | Yes | Yes |
| Input Common-Mode Range | Below negative rail | Below negative rail | Below negative rail | Below negative rail | Includes negative rail | Includes negative rail |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
主要差異化特點
- Ultra-low power consumption of 250µA per channel (對比ADA4940-2)
- Dual-channel configuration in a 16-TSSOP package (對比THS4522)
- Input common-mode range below the negative rail (對比LTC6362)
設計說明
The THS4532 operates from 2.5V to 5.5V and draws only 250µA per channel. Ensure the power supply is adequately decoupled with 0.1µF ceramic capacitors placed close to the V+ and V- pins. For optimal performance, use a low-noise LDO regulator if the supply is noisy. The low quiescent current makes it suitable for battery-powered designs, but verify the supply voltage remains within the specified range under load.
For best noise performance, keep the feedback network components close to the amplifier and use short, direct traces. The input common-mode range extends below the negative rail, allowing ground-referenced inputs, but ensure the PCB layout minimizes parasitic capacitance at the inputs. Use a solid ground plane and avoid routing high-speed digital traces near the analog inputs to reduce coupling.
Do not exceed the absolute maximum supply voltage of 5.5V. The power-down (PD) pin is active high; leave it low or connect to ground for normal operation. When driving an ADC, set the output common-mode voltage (VOCM) to the ADC's reference midpoint to maximize dynamic range. Incorrect VOCM setting can cause clipping or reduced SNR. Always refer to the datasheet for the recommended external component values.
合規資訊
RoHS compliance confirmed by distributor listings. Other compliance data not explicitly stated in the provided sources.
