Datasheet

LM97593
SNWS019B –JULY 2007–REVISED APRIL 2013 www.ti.com
LM97593 Electrical Characteristics (continued)
Unless otherwise specified, the following specifications apply: AGND = DGND = DRGND = D18GND = 0V, V
A
= V
D
= V
DR
=
+3.3V, V
D18
= +1.8V, Internal V
REF
= +1.0V, f
CLK
= 65 MHz, V
CM
= V
COM
, t
R
= t
F
= 1 ns, C
L
= 5 pF/pin. The ADC’s 11 most
significant bits observed at the mixer output debug tap with NCO = 0Hz. Typical values are for T
A
= 25°C. Boldface limits
apply for T
MIN
≤ T
A
≤ T
MAX
. All other limits apply for T
A
= 25°C.
(1)(2)(3)
Typical Units
Symbol Parameter Conditions Limits
(4)
(Limits)
DYNAMIC CONVERTER CHARACTERISTICS
FPBW Full Power Bandwidth 650 MHz
66.2 dBFS
f
IN
= 20MHz, V
IN
= -3dBFS
SNR Signal-to-Noise Ratio f
IN
= 249MHz, V
IN
= -3dBFS 63.7 dBFS
f
IN
= 249MHz, V
IN
= -9dBFS
63.9 62.2 dBFS (min)
62.8 dBF
f
IN
= 20MHz, V
IN
= -3dBFS
SINAD Signal-to-Noise and Distortion f
IN
= 249MHz, V
IN
= -3dBFS 62.0 dBFS
f
IN
= 249MHz, V
IN
= -9dBFS
63.4 60.4 dBFS (min)
10.6 Bits
f
IN
= 20MHz, V
IN
= -3dBFS
Effective Number of Bits
ENOB f
IN
= 249MHz, V
IN
= -3dBFS 10.0 Bits
(Relative to Full Scale)
f
IN
= 249MHz, V
IN
= -9dBFS
10.3 Bits (min)
-77.1 dBc
f
IN
= 20MHz, V
IN
= -3dBFS
THD Total Harmonic Distortion f
IN
= 249MHz, V
IN
= -3dBFS -57.9 dBc
f
IN
= 249MHz, V
IN
= -9dBFS
-64.6 -54.1 dBc (max)
-82.7 dBc
f
IN
= 20MHz, V
IN
= -3dBFS
H2 Second Harmonic Distortion f
IN
= 249MHz, V
IN
= -3dBFS -59.9 dBc
f
IN
= 249MHz, V
IN
= -9dBFS
-67.3 -59.3 dBc (max)
-91.7 dBc
f
IN
= 20MHz, V
IN
= -3dBFS
H3 Third Harmonic Distortion f
IN
= 249MHz, V
IN
= -3dBFS -69.0 dBc
f
IN
= 249MHz, V
IN
= -9dBFS
-72.5 -56.8 dBc (min)
79.7 dBFS
f
IN
= 20MHz, V
IN
= -3dBFS
SFDR Spurious Free Dynamic Range f
IN
= 249MHz, V
IN
= -3dBFS 68.0 dBFS (min)
f
IN
= 249MHz, V
IN
= -9dBFS
76.3 67.0 dBFS
f
1IN
= 246MHz, V
IN
= -15dBFS
IMD Intermodulation Distortion f
2IN
= 250MHz, V
IN
= -15dBFS -77.5 dBFS
(f
1IN
+ f
2IN
= -9dBFS)
Dynamic Gain Error -3 dBFS reference, -50dBFS target ±1.3 ±2 dB
INTERCHANNEL CHARACTERISTICS
Channel - Channel Offset Match 10 MHz -1dBFS driven ±0.2 %FS
Channel - Channel Gain Match 10 MHz -1dBFS driven ±0.4 %FS
Crosstalk (AGC fixed at 0dB gain, with AGC
249MHz -3dBFS driven channel, 50Ω 60(+42)
operating the crosstalk will improve at the dBc
termination measured channel
(8)
output)
CIC OUTPUT CHARACTERISTICS
SNR Signal-to-Noise Ratio CIC Decimation = 8, NCO = 11.1MHz 68.6 66.1 dBFS
(248.9MHz @65MSPS aliases to 11.1
SINAD Signal-to-Noise and Distortion 68.5 66.1 dBFS
MHz), f
IN
= 249MHz at -3dBFS, signal
SFDR Spurious Free Dynamic Range 75.1 70.3 dBc
observed at F1 In Debug tap
DDC OUTPUT CHARACTERISTICS
82 (+42)
GSM Filter set, 200kHz channel BW,
SNR Signal-to-Noise Ratio dBFS
(8)
NCO = 11.1MHz (248.9MHz
SINAD Signal-to-Noise and Distortion @52MSPS aliases to 11.1 MHz), f
S
= 73 dBc
52MSPS, f
IN
= 249MHz at -9dBFS
SFDR Spurious Free Dynamic Range 90 dBc
(8) (+x) indicates the additional dynamic range provided by the AGC. The DVGA in front of the LM97593 provides 42 dB of gain adjustment.
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