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LM15851 Datenblatt(PDF) 10 Page - Texas Instruments

Teilenummer LM15851
Bauteilbeschribung  LM15851 Ultra-Wideband RF Sampling Subsystem
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LM15851
SLAS990D – JANUARY 2014 – REVISED JULY 2015
www.ti.com
Electrical Characteristics (continued)
Unless otherwise noted, these specifications apply for V(VA12) = V(VD12) = 1.2 V, V(VA19) = 1.9 V, VIN full scale range at default
setting (725 mVPP), VIN = –1 dBFS, differential AC-coupled sinewave input clock, ƒ(DEVCLK) = 4 GHz at 0.5 VPP with 50% duty
cycle, R(RBIAS) = 3.3 kΩ ±0.1%, after a foreground (FG) mode calibration with timing calibration enabled. Typical values are at
TA = 25°C.
(1)(2)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
TA = 25°C
(3)
60.1
Signal-to-noise ratio,
TA = TMIN to TMAX
(3)
56.7
FIN = 600 MHz, –1 dBFS, decimate-by-4
integrated across DDC alias
mode
SNR2
protected output bandwidth
TA = 25°C, calibration = BG
(3)
60.2
dBFS
Input frequency-dependent
TA = TMIN to TMAX, calibration = BG
(3)
56.7
interleaving spurs excluded
FIN = 2400 MHz, –1 dBFS, decimate-by-4 mode
(3)
57
TA = 25°C
59.9
Signal-to-noise and distortion
TA = TMIN to TMAX
55.9
ratio, integrated across DDC
FIN = 600 MHz, –1 dBFS, decimate-by-4
alias protected output
mode
SINAD1
TA = 25°C, calibration = BG
59.2
dBFS
bandwidth
Input frequency-dependent
TA = TMIN to TMAX, calibration = BG
53.1
interleaving spurs included
FIN = 2400 MHz, –1 dBFS, decimate-by-4 mode
56.4
TA = 25°C
(3)
60.1
Signal-to-noise and distortion
TA = TMIN to TMAX
(3)
56.3
FIN = 600 MHz, –1 dBFS, decimate-by-4
ratio, integrated across DDC
mode
SINAD2
alias protected output
TA = 25°C, calibration = BG
(3)
60.1
dBFS
bandwidth
TA = TMIN to TMAX, calibration = BG
(3)
56.4
Interleaving spurs excluded
FIN = 2400 MHz, –1 dBFS, decimate-by-4 mode
(3)
57
TA = 25°C
9.7
TA = TMIN to TMAX
9.0
Effective number of bits,
FIN = 600 MHz, –1 dBFS, Decimate-by-4
integrated across DDC alias
mode
ENOB1
TA = 25°C, calibration = BG
9.5
Bits
protected output bandwidth
Interleaving spurs included
TA = TMIN to TMAX, calibration = BG
8.5
FIN = 2400 MHz, –1 dBFS, decimate-by-4 mode
9.1
TA = 25°C
(3)
9.7
TA = TMIN to TMAX
(3)
9.0
Effective number of bits,
FIN = 600 MHz, –1 dBFS, decimate-by-4
integrated across DDC alias
mode
ENOB2
TA = 25°C, calibration = BG
(3)
9.7
Bits
protected output bandwidth
Interleaving spurs excluded
TA = TMIN to TMAX, calibration = BG
(3)
9.1
FIN = 2400 MHz, –1 dBFS, decimate-by-4 mode
(3)
8.5
TA = 25°C
70.1
TA = TMIN to TMAX
59.2
Spurious-free dynamic range
FIN = 600 MHz, –1 dBFS, decimate-by-4
across entire Nyquist
mode
SFDR1
TA = 25°C, calibration = BG
62.9
dBFS
bandwidth
Interleaving spurs included
TA = TMIN to TMAX, calibration = BG
51.8
FIN = 2400 MHz, –1 dBFS, decimate-by-4 mode
66.4
TA = 25°C
(3)
71.6
TA = TMIN to TMAX
(3)
60
Spurious-free dynamic range
FIN = 600 MHz, –1 dBFS, decimate-by-4
across entire Nyquist
mode
SFDR2
TA = 25°C, calibration = BG
(3)
74.8
dBFS
bandwidth
Interleaving spurs excluded
TA = TMIN to TMAX, calibration = BG
(3)
62.9
FIN = 2400 MHz, –1 dBFS, Decimate-by-4 mode
(3)
80.4
TA = 25°C
–72
TA = TMIN to TMAX
–56
Interleaving offset spur at ½
FIN = 600 MHz, –1 dBFS, decimate-by-4
ƒS/2
dBFS
sampling rate
(4)
mode
TA = 25°C, calibration = BG
–65
TA = TMIN to TMAX, calibration = BG
–50.5
TA = 25°C
–68
TA = TMIN to TMAX
–55
Interleaving offset spur at ¼
FIN = 600 MHz, –1 dBFS, decimate-by-4
ƒS/4
dBFS
sampling rate
(4)
mode
TA = 25°C, calibration = BG
–62
TA = TMIN to TMAX, calibration = BG
–47.4
TA = 25°C
–75
Interleaving spur at ½
TA = TMIN to TMAX
–62.3
FIN = 600 MHz, –1 dBFS, decimate-by-4
ƒS/2 – FIN
sampling rate – input
dBFS
mode
TA = 25°C, calibration = BG
–70
frequency
(4)
TA = TMIN to TMAX, calibration = BG
–51.5
(3)
Interleave related spurs at ƒS / 2 – FIN, ƒS / 4 + FIN and ƒS / 4 – FIN are excluded from these performance calculations. The magnitude
of these spurs is provided separately.
(4)
Magnitude of reported tones in output spectrum of ADC core. This tone will only be present in the DDC output for specific Decimation
and NCO settings. Careful frequency planning can be used to intentionally place unwanted tones outside the DDC output spectrum.
10
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