Features: `Dual Independent Digitally Controlled VGAs
`-4 to 20dB Gain Range
`1 dB Step Size ± 0.2 dB
`Differential input and output
150 Differential Input
OpenCollector Differential Output
`8.7 dB noise figure @ maximum gain
`OIP3 of ~50dBm at 140MHz
`−3 dB bandwidth of 700 MHz
`Excellent Channel to Channel Isolation
`Two Parallel 5-bit Control Interfaces
`Wide input dynamic range
`Power-down Control
`Single 5V Supply Operation
`32 Lead LFCSP 5 x 5 mm PackageApplication·Differential ADC drivers
·Main and Diverstiy IF Sampling Receivers
·High Output Power IF Amplification
·Multi-channel Receivers
·InstrumentationPinout
Specifications
| Gain Control |
Digital |
| -3 dB BW (MHz) |
690MHz |
| Gain Low End (dB) |
-4dB |
| Gain High End (dB) |
+20dB |
| Number of Channels |
2 |
| Supply Voltage (V) |
+5V |
| Supply Current |
260mA |
| Gain Accuracy (dB) |
±0.2dB |
| Rating |
Rating |
| Supply Voltage, VPOS |
5.5 V |
| ENBA, ENBB, A0-A4, B0-B4 |
-0.6 to (VPOS + 0.6V) |
| Input Voltage, VIN+ ,VIN- |
-0.6 to +3.1V |
| Internal Power Dissipation |
TBD mW |
| JA (Exposed paddle soldered down) |
TBD/W |
| JA (Exposed paddle not soldered down) |
TBD/W |
| JC (At exposed paddle) |
TBD/W |
| Maximum Junction Temperature |
TBD |
| Operating Temperature Range |
40 to +85 |
| Storage Temperature Range |
65 to +150 |
| Lead Temperature Range (Soldering 60 sec) |
TBD |
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability
DescriptionThe AD8376 is a dual channel, digitally controlled, variable gain wide bandwidth amplifier that provides precise gain control, high IP3, and low noise figure. The excellent distortion performance and
The AD8376 is a dual channel digitally controlled, variable gain wide bandwidth amplifier that provides precise gain control, high IP3 and low noise figure. The excellent distortion performance and high signal bandwidth makes the AD8376 an excellent gain control device for a variety of receiver applications.
For wide input dynamic range applications, the AD8376 pro-vides a broad 24 dB gain range with 1 dB resolution. The gain of each channel is adjusted through dedicated 5-pin control interfaces and can be driven using standard TTL levels. The open-collector outputs provide a flexible interface, allowing the overall signal gain to be set by the loading resistance. The AD8376 offers a maximum trans-conductance gain of 67 m-1's. This results in a signal voltage gain proportional to the load resistance. When driving a 150 differential load, the maximum signal gain will be 20 dB.
Using a high speed SiGe process and incorporating proprietary distortion cancellation techniques, the AD8376 achieves 50 dBm output IP3 at 140 MHz.
Each channel of the AD8376 can be individually powered on by applying the appropriate logic level to the ENBA and ENBB power enable pins. The quiescent current of the AD8376 is typically 130 mA per channel. When powered down, the AD8376 consumes less than 5mA and offers excellent input to output isolation, lower than -50 dB at 200 MHz.
Fabricated on an ADI's high speed SiGe process, the AD8376 provides precise gain adjustment capabilities with good distortion performance. The AD8376 amplifier comes in a compact, thermally enhanced 5 x 5mm 32-lead LFCSP package and operates over the temperature range of −40 to +85.
AD8376 Data Sheet
