參數(shù)資料
型號(hào)： SA7025DK
廠商： NXP SEMICONDUCTORS
元件分類： XO, clock
英文描述： Low-voltage 1GHz fractional-N synthesizer
中文描述： PLL FREQUENCY SYNTHESIZER, 1000 MHz, PDSO20
封裝： PLASTIC, SOT-266, SSOP-20
文件頁(yè)數(shù)： 7/22頁(yè)
文件大小： 304K
代理商： SA7025DK
Philips Semiconductors
Product specification
SA7025
1GHz low-voltage Fractional-N synthesizer
1996 Aug 6
7
AC ELECTRICAL CHARACTERISTICS
(continued)
SYMBOL
PARAMETER
TEST CONDITIONS
LIMITS
TYP
UNITS
MIN
MAX
t
SW
Pulse width; STROBE
Pulse width STROBE
A word, PR = ‘01’
1
f
VCO
(NM2
65)
t
W
ns
A word, PR = ‘10’
1
fVCO
[(NM2
65)
(NM3
1)
72]
tW
NOTES:
1. When a serial input “A” word is programmed, the main charge pumps on PHP and PHI are in the “speed up mode” as long as STROBE = H.
When this is not the case, the main charge pumps are in the “normal mode”.
2. The relative output current variation is defined thus:
I
OUT
I
OUT
|(I
2
3. F
RD
is the value of the 3 bit fractional accumulator.
4. Monotonicity is guaranteed with C
N
= 0 to 255.
5. Power supply current measured with V
DD
= V
CCP
= 3V, V
DDA
= 5V, f
RF IN
= 915.99MHz, XTAL at 21.36MHz, AUX at 85.92MHz (PA = ‘0’),
Main comp frequency = 240kHz, Auxiliary comp frequency = 120kHz, CN = 160, CL = 0, CK = 0. Internal registers NM1 = 52, NM2 = 0,
NM3 = 4, PR = ‘10’, SM = ‘00’, SA = ‘01’, NA = 179, NF = 5, FMOD = 8, NR = 89, PA = 0, IRN = IRA = IRF = 25
μ
A, lock condition, normal
mode. Operational supply current = I
DDA
+ I
DD
+ I
CCP
.
6. Specification condition: CN = 255
7. Specification conditions:
1) CN = 255; CL = 1, or
2) CN = 75; CL = 3
8. Typical output current | I
PHI
| = –I
RN
x CN x 2
(CL+1)
x CK/32:
1) CN = 160; CL = 3; CK = 1, or
2) CN = 160; CL = 2; CK = 2, or
3) CN = 160; CL = 1; CK = 4, or
4) CN = 160; CL = 0; CK = 8
9. Any RFD, CL = 1 for speed-up pump. The integral pump is intended for switching only and the fractional compensation is not guaranteed.
10.Specification conditions: F
RD
= 1 to 7; CL = 1.
11. Specification conditions:
1) F
RD
= 1 to 7; CL = 1; CK = 2, or
2) F
= 1 to 7; CL = 2; CK = 1.
12.The matching is defined by the sum of the P and the N pump for a given output voltage.
13.Limited analog supply voltage range 4.5 to 5.5V.
14.For f
IN
< 50MHz, low frequency operation requires DC-coupling and a minimum input slew rate of 32V/
μ
s.
15.Guaranteed by design.
16.Close in noise for the charge pumps is tested on a sample basis in a typical application in order to eliminate parts outside the normal
distribution.
17.F
XTAL
= 14.4MHz, V
XTAL
= 500mV
P-P
, comparison frequency = 200kHz, Loop bandwidth = 5kHz, Audio filter = 300Hz to 15kHz.
2
(I
2
I
1
)
I
1
)|; with V
1
= 0.7V, V
2
= V
DDA
– 0.8V (see Figure 3).
相關(guān)PDF資料
PDF描述
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SA7026 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:1.3GHz low voltage fractional-N dual frequency synthesizer
SA7026DH 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:1.3GHz low voltage fractional-N dual frequency synthesizer
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SA702N 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Divide by: 64/65/72 triple modulus low power ECL prescaler
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