16-channel VGA with ADC - AFE5851

AFE5851 (ACTIVE)

16-channel VGA with ADC

 

Recommended alternative parts

  • AFE5801  - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.   Same functionality as AFE5851 with 8-channel and 65 MSPS max channel sample rate.

Description

The AFE5851 is an analog front-end targeting applications where the power and level of integration are critical. The device contains 16 variable gain amplifiers (VGA), followed by an octal high speed (up to 65 MSPS) analog to digital converter (ADC).

Each of the 16 single ended inputs is buffered, accepts up to 1VPP maximum input swing and it is followed by a VGA with a gain range from –5dB to 31dB. The VGA gain is digitally controlled and the gain curves versus time can be stored in memory, integrated within the device using the serial interface.

A selectable clamping and anti-alias low pass filter (with 3dB attenuation at 7.5, 10 or 14MHz) is also integrated between the VGA and ADC for every channel. The VGA/anti-alias filter outputs are differential (limited to 2 VPP) and drive the on-board 12-bit 65MSPS ADC that is shared between two VGAs to optimize the power dissipation. Each VGA output is sampled at alternate clock cycles, making the effective sampling frequency half the input clock rate. The ADC also scales down its power consumption should a lower sampling rate be selected.

The ADC outputs are serialized in LVDS streams further minimizing power and board area. The AFE5851 is available in a 64-pin QFN package (9x9mm2) and is specified over the full industrial temperature range (–40°C to 85°C).

Features

  • 16 Variable Gain Amplifiers (VGA)
    • 16 Single-Ended Buffered Inputs With 1VPP Maximum Swing
    • 5.5nV/√Hz VCA Input Noise (31dB Gain).
    • Variable Gain –5dB to 31dB With 0.125dB Steps
    • Digital Gain Control
  • 3rd Order Anti-Aliasing Filter With Programmable Cut-Off Frequency (7.5, 10 and 14MHz).
  • Clamping
  • Analog-to-Digital Converter (ADC)
    • Octal channel 12-bit, 65 MSPS
    • 32.5 MSPS Maximum per Input Channel
    • 2 VGA Outputs Alternately Sampled by Each ADC
    • Internal and External Reference Support
    • No External Decoupling Required for References
    • Serial LVDS Outputs
  • 1.8V and 3.3V Supply
  • 39 mW Total Power per Channel at 32.5 MSPS
  • 64-QFN Package (9mm × 9mm)
  • APPLICATIONS
    • Imaging: Ultrasound, PET
  • RELATED DEVICES
    • AFE5801: Octal VGA+ADC, 65 MSPS/channel

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Parametrics Compare all products in Ultrasound

 
Number of Channels (#)
Resolution (Bits)
Function
Input Voltage Noise (Typ) (nV/rtHz)
Total Max Gain (Typ) (dB)
Power/Channel (Typ) (mW)
Special Features
Gain Error (Typ) (dB)
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Approx. Price (US$)
Gain Control Range (Typ) (dB)
Input Range (Typ) (mVpp)
HD2 Distortion (Typ) (dB)
Overload Recovery (clock cycle)
AFE5851 AFE5801 AFE5803 AFE5804 AFE5805 AFE5807 AFE5808 AFE5808A AFE5809 AFE5812 AFE5816 AFE5818 AFE58JD16 AFE58JD18
16    8    8    8    8    8    8    8    8    8    16    16    16    16   
12    12    12
14   
12    12    12
14   
12
14   
12
14   
12
14   
12, 14    12, 14    12
14   
12, 14    12, 14   
Ultrasound Analog Front End    Ultrasound Analog Front End    Ultrasound Analog Front End    Ultrasound Analog Front End    Ultrasound Analog Front End    Ultrasound Analog Front End    Ultrasound Analog Front End    Ultrasound Analog Front End    Ultrasound Analog Front End with digital demodulator    Ultrasound    Ultrasound Analog Front End    Ultrasound Analog Front End    Ultrasound Analog Front End    Ultrasound Analog Front End   
5.5    5.5    0.75    1.23    0.85    1.1    0.75    0.75    0.75    0.75    0.95    0.75    0.95    0.75   
31    31    54    49    50    54    54    54    54    54    46    54    45    54   
39    58    158    101    122    97    149    158    158    180    75    140    75    140   
DTGC    DTGC    N/A    N/A    N/A    N/A    N/A    N/A    Digital I/Q Demodulator    Digital I/Q Demodulator    DTGC    N/A    Demodulation, JESD    Demodulation, JESD   
+/-0.5    +/-0.5    0.5    +/-0.5    +/-0.5    +/-0.5    +/-0.5    +/-0.5    +/-0.5    +/- 0.5    +/- 0.5    +/- 0.5    +/- 0.5    +/- 0.5   
-40 to 85    -40 to 85    0 to 85    0 to 70    0 to 70    0 to 85    0 to 70    0 to 85    0 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
VQFN    VQFN    NFBGA    NFBGA    NFBGA    NFBGA    NFBGA    NFBGA    NFBGA    NFBGA    NFBGA    NFBGA    NFBGA    NFBGA   
64VQFN: 81 mm2: 9 x 9(VQFN)    64VQFN: 81 mm2: 9 x 9(VQFN)    135NFBGA: 135 mm2: 15 x 9(NFBGA)    135NFBGA: 135 mm2: 15 x 9(NFBGA)    135NFBGA: 135 mm2: 15 x 9(NFBGA)    135NFBGA: 135 mm2: 15 x 9(NFBGA)    135NFBGA: 135 mm2: 15 x 9(NFBGA)    135NFBGA: 135 mm2: 15 x 9(NFBGA)    135NFBGA: 135 mm2: 15 x 9(NFBGA)    135NFBGA: 135 mm2: 15 x 9(NFBGA)    289NFBGA: 225 mm2: 15 x 15(NFBGA)    289NFBGA: 225 mm2: 15 x 15(NFBGA)    289NFBGA: 225 mm2: 15 x 15(NFBGA)    289NFBGA: 225 mm2: 15 x 15(NFBGA)   
72.00 | 1ku    40.00 | 1ku    52.00 | 1ku    44.70 | 1ku    44.70 | 1ku    54.00 | 1ku    58.00 | 1ku    58.00 | 1ku    87.00 | 1ku    95.00 | 1ku    120.00 | 1ku    130.00 | 1ku    200.00 | 1ku    215.00 | 1ku   
36    36    40    46    46    40    40    40    40    40    39    40    39    40   
1000    2000    1000    280    250    1000    1000    1000    1000    1000    1000    1000    1000    1000   
-55    -75    -60    -65    -60    -60    -60    -60    -60    -60    -60    -60    -60    -60   
1    1    1    1    1    1    1    1    1    1    1    1    1    1   

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