ADA4950-1YCPZ-RL7 - Selectable Gain Diff ADC Driver | Analog Devices
料号： ADA4950-1YCPZ-RL7 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.8598 | $3.86 |
ADA4950-1YCPZ-RL7 概述
A differential amplifier is an electronic amplifier that amplifies the difference between two input voltages while rejecting common-mode signals. In the signal chain hierarchy, a differential ADC driver sits between the sensor or analog front-end and the ADC, converting single-ended signals to differential or buffering differential signals to provide the low impedance, high linearity drive required for high-resolution conversion. This function is critical in applications such as communications, instrumentation, and medical imaging where signal integrity directly impacts system performance.
Key features of the ADA4950-1 include selectable gains of 1, 2, and 3 via a single gain pin, eliminating the need for external resistor networks and reducing component count. The device operates from a single 3.3V to 5V supply or dual supplies up to ±5V, and features a wide bandwidth suitable for driving ADCs with sample rates up to 100 MSPS. The low power consumption of 5.5 mA quiescent current makes it ideal for battery-powered and channel-dense systems. The output common-mode voltage is adjustable, allowing direct interface to ADC input ranges.
Technically, the ADA4950-1 uses an internal feedback network with precision laser-trimmed resistors to achieve accurate gains and low distortion. The device provides a differential output with a common-mode reference pin (VOCM) that sets the output common-mode level, simplifying ADC interface design. The input voltage noise is 3.5 nV/√Hz, and the spurious-free dynamic range (SFDR) is excellent, ensuring high fidelity signal conversion. The LFCSP package with exposed pad offers good thermal performance and a compact footprint for space-constrained designs.
Typical applications include driving high-speed ADCs in communications receivers, medical ultrasound equipment, and test and measurement instruments. The selectable gain feature allows the same board design to accommodate different input signal levels, reducing design time and BOM cost. The device is also suitable for differential signaling over twisted-pair cables in industrial and automotive systems.
When designing with the ADA4950-1, ensure proper power supply decoupling with 0.1 µF and 10 µF capacitors close to the supply pins. The VOCM pin should be driven by a low-impedance source to set the output common-mode voltage accurately. The gain select pin (G1) must be tied to the appropriate logic level to achieve the desired gain, and the input pins should be AC-coupled if the source has a DC offset.
直接替换替代料： ADA4950-1YCPZ-RL7 ——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： ADA4950-1YCPZ-RL7 （相同外形与封装尺寸） ——差异在于 Amplifier Type, Gain Options.
快速对比工具——选择替代料号进行并排对比：
ADA4950-1YCPZ-R7
✅ 直接替换📋 参考替代料（不在目录中）
ADA4950-1YCPZ
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →ADA4950-2YCPZ-R7
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADA4932-1YCPZ-R7
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
THS4509RGTR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADA4950-1YCPZ-RL7 最大额定值与电气特性
| Number of Channels | 1 |
| Gain Options | 1, 2, 3 (selectable) |
| Supply Voltage Range | 3.3 V to 5 V (single), ±5 V (dual) |
| 静态电流 | 5.5 mA |
| Bandwidth | 1.6 GHz (G=1) |
| Slew Rate | 2900 V/µs |
| Input Voltage Noise | 3.5 nV/√Hz |
| Output Common-Mode Range | 0.2 V to 3.8 V (single 5V) |
| SFDR | -80 dBc at 10 MHz |
| 封装 | 16-LFCSP-VQ (3x3 mm) |
| 工作温度范围 | -40°C to +125°C |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| 引脚数 | 16 |
| Amplifier Type | Differential |
ADA4950-1YCPZ-RL7 引脚配置
| 引脚 1 | V+ — Positive supply |
| 引脚 2 | IN+ — Non-inverting input |
| 引脚 3 | IN- — Inverting input |
| 引脚 4 | V- — Negative supply |
| 引脚 5 | VOCM — Output common-mode voltage set |
| 引脚 6 | G1 — Gain select (1,2,3) |
| 引脚 7 | OUT+ — Non-inverting output |
| 引脚 8 | OUT- — Inverting output |
| 引脚 9 | V+ — Positive supply |
| 引脚 10 | NC — No connect |
| 引脚 11 | NC — No connect |
| 引脚 12 | NC — No connect |
| 引脚 13 | NC — No connect |
| 引脚 14 | NC — No connect |
| 引脚 15 | NC — No connect |
| 引脚 16 | NC — No connect |
典型应用
ADA4950-1YCPZ-RL7 适用于 6 应用s: High-Speed ADC Driver, Medical Ultrasound, Communications Receivers, Test and Measurement, Industrial Data Acquisition, Automotive Radar.
High-Speed ADC Driver
The ADA4950-1YCPZ-RL7 is ideal for driving high-speed ADCs in communications and instrumentation. Its selectable gain (1, 2, 3) allows matching to various ADC input ranges without external resistors. The low noise (3.5 nV/√Hz) and high bandwidth (1.6 GHz) ensure minimal signal degradation. The adjustable output common-mode (VOCM) simplifies direct interface to ADC inputs, improving overall system performance.
推荐
Medical Ultrasound
In medical ultrasound systems, the ADA4950-1YCPZ-RL7 drives ADCs in the receive path, converting the echo signals from transducers. Its low noise and high linearity preserve the weak signals, while the selectable gain accommodates varying signal amplitudes. The low power consumption is crucial for portable and multi-channel systems. The small LFCSP package saves board space in dense probe designs.
推荐
Communications Receivers
The ADA4950-1YCPZ-RL7 is used in communications receivers to drive ADCs in IF or baseband stages. Its high bandwidth and SFDR (-80 dBc at 10 MHz) ensure that the signal integrity is maintained for digital demodulation. The selectable gain allows optimization for different signal levels, and the differential output reduces common-mode noise. It is suitable for both single-ended and differential input sources.
推荐
Test and Measurement
In test equipment such as oscilloscopes and spectrum analyzers, the ADA4950-1YCPZ-RL7 provides the interface between the analog front-end and the ADC. Its wide bandwidth and fast slew rate (2900 V/µs) enable accurate capture of high-frequency signals. The selectable gain allows the user to adjust sensitivity without changing hardware. The low distortion ensures precise measurements.
推荐
Industrial Data Acquisition
The ADA4950-1YCPZ-RL7 is used in industrial data acquisition systems to condition sensor signals before ADC conversion. Its differential output rejects common-mode noise from long cable runs. The selectable gain allows adaptation to various sensor outputs. The wide supply range (3.3V to 5V) and low power make it suitable for field instruments. The small package is ideal for space-constrained modules.
推荐
Automotive Radar
In automotive radar systems, the ADA4950-1YCPZ-RL7 drives ADCs that digitize the IF signals from radar transceivers. Its high bandwidth and low noise are essential for detecting small objects. The selectable gain allows dynamic range optimization. The device operates over the automotive temperature range (-40°C to +125°C) and is available in a compact package for radar modules.
推荐
推荐产品汇总
工程参考数据： ADA4950-1YCPZ-RL7 ——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 | ADA4950-1YCPZ-R7 | ADA4950-1YCPZ | ADA4950-2YCPZ-R7 | ADA4932-1YCPZ-R7 | THS4509RGTR |
|---|---|---|---|---|---|---|
| Package | 16-LFCSP-VQ (3x3) | 16-LFCSP-VQ (3x3) | 16-LFCSP-VQ (3x3) | 16-LFCSP-VQ (3x3) | 16-LFCSP-VQ (3x3) | 16-QFN (3x3) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Number of Channels | 1 | 1 | 1 | 2 | 1 | 1 |
| Gain Options | 1, 2, 3 (selectable) | 1, 2, 3 (selectable) | 1, 2, 3 (selectable) | 1, 2, 3 (selectable) | External resistors | External resistors |
| Bandwidth (G=1) | 1.6 GHz | 1.6 GHz | 1.6 GHz | 1.6 GHz | 1.6 GHz | 1.9 GHz |
| Slew Rate | 2900 V/µs | 2900 V/µs | 2900 V/µs | 2900 V/µs | 2900 V/µs | 2800 V/µs |
| Input Voltage Noise | 3.5 nV/√Hz | 3.5 nV/√Hz | 3.5 nV/√Hz | 3.5 nV/√Hz | 3.5 nV/√Hz | 2.2 nV/√Hz |
| Supply Voltage Range | 3.3V to 5V (single), ±5V (dual) | 3.3V to 5V (single), ±5V (dual) | 3.3V to 5V (single), ±5V (dual) | 3.3V to 5V (single), ±5V (dual) | 3.3V to 5V (single), ±5V (dual) | 3V to 5V (single), ±5V (dual) |
关键差异点
- Integrated gain resistors （对比 ADA4932-1YCPZ-R7)
- Selectable gain without external components （对比 THS4509RGTR)
- Lower power consumption （对比 THS4509RGTR)
设计说明
Ensure proper power supply decoupling. Place 0.1 µF and 10 µF capacitors as close as possible to the V+ and V- pins. The ADA4950-1 operates from 3.3V to 5V single supply or ±5V dual. The quiescent current is 5.5 mA, so power dissipation is low, but decoupling is critical for high-frequency performance.
For optimal performance, use a ground plane and keep the feedback paths short. The LFCSP package has an exposed pad that should be soldered to the ground plane for thermal and electrical grounding. Route the differential outputs as a pair to minimize common-mode noise. Follow the layout guidelines in the datasheet.
The gain select pin (G1) must be tied to the correct logic level to set the gain. Do not leave it floating. The VOCM pin should be driven by a low-impedance source to set the output common-mode voltage accurately. If the source has a DC offset, use AC coupling at the inputs to avoid saturating the amplifier.
合规信息
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free finish.
