HI5721-EVS(1999) Просмотр технического описания (PDF) - Intersil
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HI5721-EVS Datasheet PDF : 14 Pages
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HI5721
BASEBAND
BIT
STREAM
ENCODER
40 MSPS
I CLK
Q
CONTROL
CONTROLLER
BUS
U1
16
CLK
19
P1
20
P0
18 LOAD#
17
TXFR#
12
ENPHAC#
9
SEL_L/M#
OUT11 6
OUT10 5
OUT9 4
OUT8 3
OUT7 2
OUT6 1
OUT5 28
OUT4 27
OUT3 26
OUT2 25
OUT1 24
OUT0 23
14
SCLK
13
SD
10 SFTEN#
U2
14
VCC
DVDD
IOUT 20
1 D9 (MSB)
2 D8
3 D7
4 D6
IOUT/ 21
5 D5
6 D4
7 D3
8 D2
9 D1
23
REF IN
24
C AMP OUT
10 D0 (LSB)
26
11
CLK
C AMP IN
25
13
REF OUT
INVERT
R4
50
28
15
DVSS
DVSS
17
RSET
ARET 19
FILTER
R1
TO RF
UP-CONVERT
STAGE
64
R1
64
+
C2 1.0µF -5.2V_A
-5.2V_A
C1 0.01µF
R1
1960
11 MSB/LSB#
HSP45102
-5.2V_D
27 DVEE
16 DVEE
AVSS 18
AVEE 22 -5.2V_A
HI5721
-5.2V_D
L1
10µH
-5.2V_A
L2
10µH
FIGURE 26. PSK MODULATOR USING THE HI5721 AND THE HSP45102 12-BIT NCO
Differential Phase, ∆Φ, is the phase error from and ideal
sine wave.
Signal to Noise Ratio, SNR, is the ratio of a fundamental to
the noise floor of the analog output. The first 5 harmonics
are ignored, and an output filter of 1/2 the clock frequency is
used to eliminate alias products.
Total Harmonic Distortion, THD, is the ratio of the DAC
output fundamental to the RMS sum of the harmonics. The
first 5 harmonics are included, and an output filter of 1/2 the
clock frequency is used to eliminate alias products.
Spurious Free Dynamic Range, SFDR, is the amplitude
difference from a fundamental to the largest harmonically or
non-harmonically related spur. A sine wave is loaded into the
D/A and the output filtered at 1/2 the clock frequency to
eliminate noise from clocking alias terms.
Intermodulation Distortion, IMD is the measure of the sum
and difference products produced when a two tone input is
driven into the D/A. The distortion products created will arise
at sum and difference frequencies of the two tones. IMD is
IMD = 2----0----l-o---g------(--R----(M--R---S--M----o-S--f----sa---u-m--m---p---l-ai--t-nu---d-d---e-d----io-f--ff-e---t-rh--e--e-n---c-f--ue---n--d-d---i-as---mt--o---er--t-n-i-o--t-an----l-)p----r--o---d---u----c---t-s----)
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out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
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