VCA8500 8-Channel, Ultralow Power, Variable Gain Amplifier with Low-Noise Preamp
The VCA8500 is an 8-channel variable gain amplifier consisting of a low-noise pre-amplifier (LNP) and a variable-gain amplifier (VGA). This combination, along with the device features, makes it ideal for a variety of ultrasound systems.
The LNP gain is fixed at 20dB, and has excellent noise and signal handling characteristics. The gain of the voltage-controlled attenuator can vary over a 46dB range with a 0V to 1.2V control voltage common to all channels of the VCA8500.
The post-gain amplifier (PGA) can be programmed for four gain settings: 20dB, 25dB, 27dB, or 30dB gain. As a means to improve system overload recovery time, the VCA8500 provides an internal clamping function. The PGA settings as well the clamp levels are controlled through the serial interface
|
VCA8500 |
| GBW (Typ) (MHz) |
70 |
| Vs (Min) (V) |
3.14 |
| Vs (Max) (V) |
3.47 |
| Number of Channels |
8 |
| Pin/Package |
64VQFN |
| BW @ Acl (MHz) |
15 |
| Available Channels |
O |
| Gain Range (dB) |
20, 25, 27, 30 |
| Approx. Price (US$) |
40.00 | 100u |
| Noninverting Input Current Noise (pA/rtHz) |
3 |
| Crosstalk (-dB) |
55 |
| Operating Temperature Range (C) |
-40 to 85 |
VCA8500 特性
- Ultralow Power: 65mW/Channel
- Low Noise: 0.8nV/Hz
- Low-Noise Pre-Amp (LNP):
- 20dB Fixed Gain
- 250mVPP Linear Input Range
- Variable Gain Amplifier:
- Gain Control Range: 46dB
- Selectable PGA Gain:
20dB, 25dB, 27dB, 30dB
- Fast Overload Recovery
- Output Clamping Control
- Integrated Low-Pass Filter:
- Second-Order, Linear Phase
- Bandwidth: 10MHz, 15MHz
- High Accuracy:
- Low Gain Error: ±0.5dB
- Excellent Channel Matching: ±0.25dB
- Distortion, HD2: -50dBc at 5MHz
- Integrated CW Switch Matrix:
- Serial Control Interface
VCA8500 芯片订购指南
| 器件 |
状态 |
温度 |
价格 |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| VCA8500IRGCR |
ACTIVE |
-40 to 85 |
40.00 | 100u |
VQFN (RGC) | 64 |
2000 | LARGE T&R |
|
| VCA8500IRGCRG4 |
ACTIVE |
-40 to 85 |
40.00 | 100u |
VQFN (RGC) | 64 |
2000 | LARGE T&R |
|
| VCA8500IRGCT |
ACTIVE |
-40 to 85 |
40.00 | 100u |
VQFN (RGC) | 64 |
250 | SMALL T&R |
|
| VCA8500IRGCTG4 |
ACTIVE |
-40 to 85 |
40.00 | 100u |
VQFN (RGC) | 64 |
250 | SMALL T&R |
|
VCA8500 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| VCA8500IRGCR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-3-260C-168 HR |
VCA8500IRGCR |
VCA8500IRGCR |
| VCA8500IRGCRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-3-260C-168 HR |
VCA8500IRGCRG4 |
VCA8500IRGCRG4 |
| VCA8500IRGCT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-3-260C-168 HR |
VCA8500IRGCT |
VCA8500IRGCT |
| VCA8500IRGCTG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-3-260C-168 HR |
VCA8500IRGCTG4 |
VCA8500IRGCTG4 |
VCA8500 应用技术支持与电子电路设计开发资源下载
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VCA8500 工具与软件