Datasheet

AD9122
Rev. B | Page 7 of 60
AC SPECIFICATIONS
T
MIN
to T
MAX
, AVDD33 = 3.3 V, DVDD18 = 1.8 V, CVDD18 = 1.8 V, I
FS
= 20 mA, maximum sample rate, unless otherwise noted.
Table 4.
Parameter Min Typ Max Unit
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
f
DAC
= 100 MSPS, f
OUT
= 20 MHz 78 dBc
f
DAC
= 200 MSPS, f
OUT
= 50 MHz 80 dBc
f
DAC
= 400 MSPS, f
OUT
= 70 MHz 69 dBc
f
DAC
= 800 MSPS, f
OUT
= 70 MHz 72 dBc
TWO-TONE INTERMODULATION DISTORTION (IMD)
f
DAC
= 200 MSPS, f
OUT
= 50 MHz 84 dBc
f
DAC
= 400 MSPS, f
OUT
= 60 MHz 86 dBc
f
DAC
= 400 MSPS, f
OUT
= 80 MHz 84 dBc
f
DAC
= 800 MSPS, f
OUT
= 100 MHz 81 dBc
NOISE SPECTRAL DENSITY (NSD), EIGHT-TONE, 500 kHz TONE SPACING
f
DAC
= 200 MSPS, f
OUT
= 80 MHz −162 dBm/Hz
f
DAC
= 400 MSPS, f
OUT
= 80 MHz −163 dBm/Hz
f
DAC
= 800 MSPS, f
OUT
= 80 MHz −164 dBm/Hz
W-CDMA ADJACENT CHANNEL LEAKAGE RATIO (ACLR), SINGLE-CARRIER
f
DAC
= 491.52 MSPS, f
OUT
= 10 MHz 84 dBc
f
DAC
= 491.52 MSPS, f
OUT
= 122.88 MHz 82 dBc
f
DAC
= 983.04 MSPS, f
OUT
= 122.88 MHz 83 dBc
W-CDMA SECOND ACLR, SINGLE-CARRIER
f
DAC
= 491.52 MSPS, f
OUT
= 10 MHz 88 dBc
f
DAC
= 491.52 MSPS, f
OUT
= 122.88 MHz 86 dBc
f
DAC
= 983.04 MSPS, f
OUT
= 122.88 MHz 88 dBc
Table 5. Maximum Rate (MSPS) with DVDD and CVDD Supply Regulation
Bus Width
Interpolation
Factor
f
INTERFACE
(MSPS) f
DAC
(MSPS)
DVDD18, CVDD18 = DVDD18, CVDD18 =
1.8 V ± 5% 1.8 V ± 2% 1.9 V ± 2% 1.8 V ± 5% 1.8 V ± 2% 1.9 V ± 2%
Nibble (4 Bits) 1× 1100 1200 1230 137.5 150 153.75
2× 1100 1200 1230 275 300 307.5
4× 1100 1200 1230 550 600 615
8× 1100 1200 1230 1100 1200 1230
Byte (8 Bits) 1× 1100 1200 1230 275 300 307.5
2× 1100 1200 1230 550 600 615
4× 1100 1200 1230 1100 1200 1230
8× 550 600 615 1100 1200 1230
Word (16 Bits) 1× 1100 1200 1230 550 600 615
2× (HB1) 900 1000 1000 900 1000 1000
2× (HB2) 1100 1200 1230 1100 1200 1230
4× 550 600 615 1100 1200 1230
8× 275 300 307.5 1100 1200 1230