THS4522 - 95MHz Low Power Dual FDA | Texas Instruments
料号： THS4522IPWR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.55 | $35.50 |
| 100 | $3.1 | $310.00 |
| 500 | $2.75 | $1,375.00 |
| 1,000 | $2.4 | $2,400.00 |
| 3,000 | $2.1 | $6,300.00 |
THS4522IPWR 概述
A fully differential amplifier (FDA) is an operational amplifier with differential inputs and differential outputs, providing balanced positive and negative signal phases simultaneously. FDAs are essential for driving high-performance ADCs because balanced signaling improves common-mode rejection and suppresses even-order harmonics. As a subset of operational amplifiers within analog signal processing, FDAs enable precise amplification, filtering, and level shifting in data converter front-end circuits.
Key features include very low input voltage noise of 4.6 nV/rtHz, low distortion of -110 dBc at 1 MHz, and 55 mA output current. A power-down pin reduces quiescent current to 0.5 uA, and the rail-to-rail output maximizes dynamic range in single-supply systems. Negative rail input capability simplifies interfacing with ground-referenced sensors.
The THS4522 uses a complementary bipolar process with a precision input stage, achieving 0.5 mV offset voltage and a 95 MHz gain bandwidth product. Full specification across the industrial temperature range ensures reliable operation in harsh environments, while the dual-channel TSSOP-16 configuration saves board space in multi-channel systems.
Typical applications include driving high-speed ADCs in medical imaging, industrial process control, and test and measurement equipment. Low power consumption makes it suitable for portable battery-powered instruments, and rail-to-rail output with negative-rail input enables single-supply sensor interfaces.
When designing with the THS4522, decouple supplies with 0.1 uF and 10 uF capacitors close to the VCC and VEE pins, use precision low-TCR feedback resistors to maintain gain accuracy, and bypass the VOCM pin to ground for optimal output common-mode control.
直接替换替代料： THS4522IPWR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： THS4522IPWR （相同外形与封装尺寸） ——差异在于 Input Common-Mode Range, Output Type, Quiescent Current per Channel, Supply Voltage Range.
快速对比工具——选择替代料号进行并排对比：
THS4552IPWR
✅ 直接替换📋 参考替代料（不在目录中）
THS4532IPWR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
THS4524IPWR
⚡ 相同封装📋 参考替代料（不在目录中）
THS4522IPWR 最大额定值与电气特性
| Amplifier Type | Fully Differential Amplifier (FDA) |
| 通道数 | 2 |
| Bandwidth (-3 dB, G=1) | 95 MHz |
| Gain Bandwidth Product | 95 MHz |
| Slew Rate | 100 V/us |
| Input Voltage Noise | 4.6 nV/rtHz |
| Quiescent Current per Channel | 1.1 mA |
| Supply Voltage Range | 2.5 V to 5.5 V (single supply) |
| Input Common-Mode Range | Includes negative rail |
| 输出类型 | Rail-to-rail output |
| Harmonic Distortion | -110 dBc at 1 MHz |
| Offset Voltage | 0.5 mV |
| Output Current | 55 mA |
| Power-Down Current | 0.5 uA |
| 工作温度 | -40C to +125C |
| 封装 | 16-TSSOP (PW) |
| 安装类型 | Surface Mount |
THS4522IPWR 16-tssop (pw) 引脚配置指南
THS4522IPWR（16-tssop (pw) 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： THS4522IPWR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
THS4522IPWR 适用于 6 应用s: High-Precision ADC Driving, Portable and Battery-Powered Instruments, Industrial Process Control and PLC Analog I/O, Medical Instrumentation and Patient Monitoring, Test and Measurement Equipment, Active Differential Filtering.
High-Precision ADC Driving
The THS4522 is purpose-built as an ADC driver: its fully differential architecture suppresses even-order harmonics (-110 dBc at 1 MHz) and rejects common-mode noise, directly improving SNR at the converter. The 95 MHz bandwidth supports 16-bit ADCs sampling at hundreds of kSPS to low MSPS, while the output common-mode (VOCM) pin allows level shifting to match the ADC reference midpoint. Placed directly before the ADC input with a small RC filter, it delivers balanced differential signals from a single-ended source; the 1.1 mA per channel budget keeps the analog front end within a few milliwatts, ideal for low-power acquisition systems.
推荐
Portable and Battery-Powered Instruments
With 1.1 mA per channel quiescent current and a power-down mode reducing consumption to 0.5 uA, the THS4522 suits battery-operated handheld meters, data loggers, and wireless sensor nodes. Its 2.5V to 5.5V single-supply operation runs directly from a Li-ion cell or 3.3V rail without a negative supply, and the rail-to-rail output preserves usable dynamic range at low supply voltages. During duty-cycled operation, the power-down pin gates the analog front end between measurements, extending battery life substantially compared to always-on FDAs while maintaining fast wake-up for periodic sampling.
推荐
Industrial Process Control and PLC Analog I/O
The THS4522's -40C to +125C industrial temperature rating and ground-sensing input (common-mode includes the negative rail) make it a strong fit for 4-20 mA loop receivers, sensor conditioners, and PLC analog input cards. The differential output drives precision delta-sigma ADCs with high common-mode rejection in electrically noisy factory environments, while the 4.6 nV/rtHz noise floor resolves millivolt-level thermocouple and bridge sensor signals. Dual channels per TSSOP-16 package halve board area versus single-channel FDAs, increasing channel density in multi-loop I/O modules.
推荐
Medical Instrumentation and Patient Monitoring
Low power, low noise, and differential signaling are all critical in medical front ends such as biopotential amplifiers, blood-analysis instruments, and portable patient monitors. The THS4522's 4.6 nV/rtHz input noise preserves microvolt-level physiological signals, and the fully differential path rejects 50/60 Hz mains interference common in clinical environments. Single 3.3V operation with rail-to-rail output accommodates small signal swings near the rails, and battery isolation schemes benefit from the minimal 2.2 mA total analog current draw of the dual-channel device.
推荐
Test and Measurement Equipment
Bench instruments, oscilloscope front ends, and automated test systems use the THS4522 to convert single-ended signals to differential for high-resolution converters. The 95 MHz bandwidth supports megahertz-range signal chains, and -110 dBc distortion at 1 MHz maintains measurement fidelity in the first Nyquist zone. The VOCM input lets the instrument firmware re-center the differential output for different ADC references, adding flexibility across product variants. Rail-to-rail output maximizes converter input range utilization on a single 5V rail, simplifying supply architecture.
推荐
Active Differential Filtering
The THS4522 implements fully differential multiple-feedback (MFB) low-pass and band-pass filters ahead of ADCs, providing anti-aliasing with gain in one stage. Unlike single-ended Sallen-Key designs, a differential MFB filter using the THS4522 rejects common-mode noise and even-order distortion while defining both filter response and output common-mode independently via the VOCM pin. The 95 MHz gain bandwidth comfortably realizes cutoff frequencies up to a few megahertz with adequate Q accuracy, and precision 1% resistors plus C0G capacitors maintain the transfer function across temperature in industrial conditions.
推荐
推荐产品汇总
工程参考数据： THS4522IPWR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | THS4552IPWR | THS4532IPWR | THS4524IPWR |
|---|---|---|---|---|
| Package | 16-TSSOP (PW) | 16-TSSOP (PW) - same | 16-TSSOP (PW) - same | 16-TSSOP (PW) - same, quad pinout |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Channels | 2 | 2 | 2 | 4 |
| Bandwidth (G=1) | 95 MHz | 150 MHz | 50 MHz | 95 MHz |
| Input Noise | 4.6 nV/rtHz | 3.3 nV/rtHz | 5 nV/rtHz | 4.6 nV/rtHz |
| Quiescent Current per Channel | 1.1 mA | 1.35 mA | 0.85 mA | 1.1 mA |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Power-Down Feature | Yes (0.5 uA) | Yes (per-channel) | Yes | Yes |
关键差异点
- Industry-leading low power in its bandwidth class （对比 THS4552IPWR)
- Dual-channel integration halves board area （对比 THS4521)
- Power-down for duty-cycled systems （对比 ADA4940-2)
设计说明
Place 0.1 uF ceramic decoupling capacitors within 2 mm of each VCC pin, with a bulk 10 uF capacitor nearby per TI's THS452x datasheet layout section. Use a solid ground plane under the amplifier, keep the feedback loop area minimal by routing feedback resistors on the top layer, and do not route switching signals beneath the input traces. Match the two feedback networks (gain-setting resistors) for best differential balance and CMRR.
The input common-mode range includes the negative rail but extends to only about VS+ minus 1.3 V, so verify the source's common-mode against the closed-loop gain required. The VOCM pin must be driven from a low-impedance source (such as an ADC VCM output) or bypassed; leaving it floating causes uncontrolled output common-mode. Power-down pin polarity must be observed - consult the datasheet logic table before connecting to a GPIO.
Use 0.1% or matched (better than 0.5%) feedback resistors to preserve the -110 dBc distortion capability; resistor mismatch converts differential distortion into common-mode artifacts and degrades CMRR. Keep gain-setting resistor values in the 500 ohm to 1.5 kilo-ohm range to balance noise (low values) against loading (high values), and add a small RC (10-50 ohm + 10-100 pF) between FDA output and ADC input for stability with converter input capacitance, per TI application section SBOS539 layout guidance.
合规信息
RoHS and lead-free status per standard TI PW-package offering; detailed REACH/halogen status not present in provided data.
