AD8335
PRODUCTIONQuad Low Noise, Low Cost Variable Gain Amplifier
- Part Models
- 3
- 1ku List Price
- Starting From $15.71
Part Details
- Low noise preamplifier (PrA)
- Voltage noise = 1.3 nV/√Hz typical
- Current noise = 2.4 pA/√Hz typical
- NF = 7 dB (RS = RIN = 50 Ω)
- Single-ended input; VIN maximum = 625 mV p-p
- Active input match
- Input SNR (noise bandwidth = 20 MHz) = 92 dB
- VGA
Differential output
VOUT maximum = 5 V p-p, RL = 500 Ω differential
Gain range (8 dB output gain step)
−10 dB to +38 dB—low gain mode
−2 dB to +46 dB—high gain mode
Accurate linear-in-dB gain control - For additional features please see data sheet
The AD8335 is a quad variable gain amplifier (VGA) with low noise preamplifier intended for cost and power sensitive applications. Each channel features a gain range of 48 dB, fully differential signal paths, active input preamplifier matching, and user-selectable maximum gains of 46 dB and 38 dB. Individual gain controls are provided for each channel.
The preamplifier (PrA) has a single-ended to differential gain of ×8 (18.06 dB) and accepts input signals <625 mV p-p. PrA noise is 1.2 nV/√Hz and the combined input referred voltage noise of the PrA and VGA is 1.3 nV/√Hz at maximum gain.
Assuming a 20 MHz noise bandwidth (NBW), the Nyquist frequency for a 40 MHz ADC, the input SNR is 92 dB. The HLxx pin optimizes the output SNR for 10-bit and 12-bit ADCs with 1 V p-p or 2 V p-p full-scale (FS) inputs.
Channel 1 and Channel 2 are enabled through the EN12 pin and Channel 3 and Channel 4 are enabled through the EN34 pin. For VGA only applications, the PrAs can be powered down, significantly reducing power consumption.
The AD8335 is available in a 64-lead lead frame chip scale package (9 mm × 9 mm) for the industrial temperature range of −40°C to +85°C.
Applications
Data Sheet, Rev A, 08/2008
Documentation
Data Sheet 1
Technical Articles 2
Frequently Asked Question 1
Product Selection Guide 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD8335ACPZ | 64-Lead LFCSP (9mm x 9mm w/ EP) | ||
| AD8335ACPZ-REEL | 64-Lead LFCSP (9mm x 9mm w/ EP) | ||
| AD8335ACPZ-REEL7 | 64-Lead LFCSP (9mm x 9mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 9, 2021 - 20_0126 Conversion of Select Sizes LFCSP Products from Punched to Sawn and Transfer of Assembly Site to ASE Korea |
||
| AD8335ACPZ | PRODUCTION | |
| AD8335ACPZ-REEL | PRODUCTION | |
| AD8335ACPZ-REEL7 | ||
|
Jul 12, 2010 - 10_0135 Minor Metal Mask Change to AD8335 |
||
| AD8335ACPZ | PRODUCTION | |
| AD8335ACPZ-REEL | PRODUCTION | |
| AD8335ACPZ-REEL7 | ||
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
SPICE Model 1
Evaluation Kits
AD8335 Evaluation Board