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AD8335

Features: Low noise preamplifier (PrA)Voltage noise = 1.3 nV/Hz typicalCurrent noise = 2.4 pA/Hz typicalNF = 7 dB (RS = RIN = 50 Ω)Single-ended input; VIN max = 625 mV p-pActive input matchInput SNR (noise bandwidth = 20 MHz) = 92 dB VGADifferential outputVOUT max = 5 V p-p, RL = 500 Ω...

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SeekIC No. : 004272152 Detail

AD8335: Features: Low noise preamplifier (PrA)Voltage noise = 1.3 nV/Hz typicalCurrent noise = 2.4 pA/Hz typicalNF = 7 dB (RS = RIN = 50 Ω)Single-ended input; VIN max = 625 mV p-pActive input matchInp...

AD8335 Data Sheet

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Part Number:
AD8335
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

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 max = 625 mV p-p
Active input match
Input SNR (noise bandwidth = 20 MHz) = 92 dB
VGA
Differential output
VOUT max = 5 V p-p, RL = 500 Ω differential
Gain range (8 dB output gain step)
−10 dB to +38 dB-LO gain mode
−2 dB to +46 dB-HI gain mode
Accurate linear-in-dB gain control
P rA + VGA performance
− 3 dB bandwidth of 70 MHz
Excellent overload performance
Supply: 5 V
Power consumption
95 mW/channel (380 mW total)
65 mW/channel (PrA off; 260 mW total)
Power-down




Application

Medical imaging (ultrasound, gamma cameras)
Sonar
Test and measurement
Precise, stable wideband gain control




Pinout

Connection Diagram

AD8335 Diagram




Specifications

Parameter Rating
Voltage
Supply VS
Preamp Input
VGA Inputs
Enable, Shutdown Preamp, and HILO
Interfaces
Gain
Power Dissipation (4-layer JEDEC Board (2S2P))
JA
JC
Operating Temperature Range
Storage Temperature Range
Lead Temperature Range (Soldering 60 s)
6 V
VS
VS
VS

VS
2.46 W
26.4°C/W
6.8°C/W
−40°C to +85°C
−65°C to +150°C
300°C


Gain Control Analog
-3 dB BW (MHz) 70MHz
Gain Low End (dB) -10dB
Gain High End (dB) +38dB
Number of Channels 4
Spectral Noise (nV/rtHz) 1.3nV/rtHz
Supply Voltage (V) +5V
Supply Current 76mA
Gain Accuracy (dB) ±0.2dB





Description

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 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) AD8335 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 HILO 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.

Channels 1 and 2 are enabled through the EN12 pin while Channels 3 and 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 (9 mm * 9 mm) package for the industrial temperature range of −40°C to +85°C.



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






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