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| 型號： | U2894B-AFSG3 |
| 英文描述： | Modulation PLL for GSM, DCS and PCS Systems |
| 中文描述： | 調(diào)制鎖相環(huán)用于GSM，DCS和PCS系統(tǒng) |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 802K |
| 代理商： | U2894B-AFSG3 |
U2894B
Rev. A4, 30-Sep-98
4 (16)
Electrical Characteristics (continued)
Tamb = 25°C, VS = 2.7 to 5.5 V
Parameters
Test Conditions / Pin
Symbol
Min.
Typ.
Max.
Unit
Phase-frequency detector (PFD)
PFD operation
fND = 450 MHz, N = 2
fRD = 450 MHz, R = 2
fPFD
50
225
MHz
Frequency comparison
only 3)
fND = 600 MHz, N = 2
fRD = 450 MHz, R = 2
fFD
300
MHz
I/Q modulator baseband inputs I, NI & Q, NQ
DC voltage
Referred to GND
VI, VNI, VQ, VNQ
1.35
VS1/2
VS1/2
+ 0.1
V
MD_IQ
Frequency range
fIO
DC
1
MHz
AC voltage 4)
Referred to GND
ACI, ACNI,
ACQ, ACNQ
200
mVpp
Differential (preferres)
ACDI, ACDQ
400
mVpp
I/Q modulator LO input MDLO
MDLO
Frequency range
fMDLO
50
450
MHz
Input impedance
Active & standby
ZMDLO
250
W
Input level
50-
W source
PMDLO
–11
–8
–5
dBm
I/Q modulator outputs MDO, NMDO
DC current
VMDO, VNMDO = VS
IMDO, INMDO
2.4
mA
Voltage compliance
VMDO, VNMDO = VC
VCMDO, VCNMDO
VS – 0.7
5.5
V
MDO output level
(differential)
500
W to VS 5)
PMDO
120
150
mVrms
Carrier suppression 5)
CSMDO
–32
–35
dBc
Sideband suppression 5)
SSMDO
–35
–40
dBc
IF spurious 5)
fLO ± 3
fmod
SPMDO
–50
–45
dBc
Noise 5)
@ 400 kHz off carrier
NMDO
–115
dBc/Hz
Frequency range
fMDO
50
450
MHz
Mixer (900 MHz)
RF input level
900 MHz
P9RF
–23
–17
dBm
LO-spurious at
RF/NRF port
@ P9MIXLO = –10 dBm
@ P9RF = –15 dBm
SP9RF
–40
dBm
MIXLO input level
0.05 to 2 GHz
P9MIXLO
–22
–12
dBm
MIXO (100-
W load)
Frequency range
fMIXO
50
450
MHz
Output level 6)
@ P9MIXLO = –15 dBm
P9MIXO
70
mVrms
Carrier suppression
@ P9MIXLO = –15 dBm
CS9MIXO
–20
dBc
3)
PFD can be used as a frequency comparator until 300 MHz for loop acquisition
4)
Single-ended operation (complementary baseband input is AC-grounded) leads to reduced linearity
(degrading suppression of odd harmonics)
5)
With typical drive levels at MDLO- & I/Q-inputs
6)
–1 dB compression point (CP-1)
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