Overview
The AD8372ACPZ-R7, produced by Analog Devices Inc., is a dual, digitally controlled, variable gain amplifier (VGA). This component is designed to provide precise gain control, high third-order intercept point (IP3), and a low noise figure, making it suitable for a variety of multichannel receiver applications. The AD8372 features a broad 41 dB gain range and is powered by a single 5 V supply, consuming 106 mA per channel. It is packaged in a 32-lead LFCSP (Lead Frame Chip Scale Package) with dimensions of 5 mm × 5 mm.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| -3 dB Bandwidth | VOUT < 1 V p-p, CLOAD < 3pF | 130 | MHz | ||
| Input Resistance (Differential) | 150 | Ω | |||
| Common-Mode Input Voltage | 2.4 | V | |||
| CMRR (Gain code = 1x101010) | 55 | dB | |||
| Maximum Voltage Gain (Gain code = 1x101010) | 32 | dB | |||
| Minimum Voltage Gain (Gain code = 1x000001) | -9 | dB | |||
| Gain Step Size | 1 dB ± 0.2 dB | ||||
| Supply Voltage | 5 | V | |||
| Current Consumption per Channel | 106 | mA |
Key Features
- Precise gain control with a 1 dB step size ± 0.2 dB.
- High IP3 and low noise figure.
- Bidirectional 8-bit SPI control interface.
- Pin-programmable output stage.
- Power-down feature with low current consumption (< 2.6 mA).
- Single external resistor to set the transconductance of the output stage.
- Band gap derived stable reference voltage of 1.56 V available at RXT1 and RXT2 pins.
Applications
- Differential ADC drivers.
- CMTS upstream direct sampling receivers.
- CATV modem signal scaling.
- Generic RF/IF gain stages.
- Single-ended-to-differential conversion.
Q & A
- What is the AD8372ACPZ-R7?
The AD8372ACPZ-R7 is a dual, digitally controlled, variable gain amplifier (VGA) produced by Analog Devices Inc. - What is the gain range of the AD8372?
The AD8372 has a broad 41 dB gain range. - How is the gain controlled in the AD8372?
The gain is controlled through a bidirectional 8-bit SPI interface. - What is the power consumption per channel of the AD8372?
The AD8372 consumes 106 mA per channel. - What is the package type of the AD8372?
The AD8372 is packaged in a 32-lead LFCSP (Lead Frame Chip Scale Package). - What are the key applications of the AD8372?
The AD8372 is used in differential ADC drivers, CMTS upstream direct sampling receivers, CATV modem signal scaling, generic RF/IF gain stages, and single-ended-to-differential conversion. - How does the AD8372 handle power-down?
The AD8372 has a power-down feature that reduces current consumption to less than 2.6 mA. - What is the common-mode rejection ratio (CMRR) of the AD8372?
The CMRR of the AD8372 is 55 dB. - What is the -3 dB bandwidth of the AD8372?
The -3 dB bandwidth of the AD8372 is 130 MHz. - How can the output stage of the AD8372 be programmed?
The output stage of the AD8372 can be programmed using a single external resistor to set the transconductance.
