ADF4208 AD [Analog Devices], ADF4208 Datasheet - Page 3

• Manufacturer Part Number: ADF4208
• Description: Dual RF PLL Frequency Synthesizers
• Manufacturer: AD [Analog Devices]

Parameter
NOISE CHARACTERISTICS
NOTES
10
Specifications subject to change without notice.
1
2
3
4
5
6
7
8
9
less than this value.
Board and the HP8562E Spectrum Analyzer. The spectrum analyzer provides the REFIN for the synthesizer (f
Operating temperature range is as follows: B Version: –40°C to +85°C.
The B Chip specifications are given as typical values.
This is the maximum operating frequency of the CMOS counters. The prescaler value should be chosen to ensure that the RF input is divided down to a frequency that is
V
Guaranteed by design. Sample tested to ensure compliance.
Typical values apply for V
The synthesizer phase noise floor is estimated by measuring the in-band phase noise at the output of the VCO and subtracting 20 logN (where N is the N divider value).
The phase noise is measured at a 1 kHz unless otherwise noted. The phase noise is measured with the EVAL-ADF4206/ADF4207EB or the EVAL-AD4208EB Evaluation
f
f
REFIN
REFIN
Phase Noise Floor (RF1)
Phase Noise Performance
Spurious Signals
DD
1 = V
ADF4206
ADF4207
ADF4208
ADF4206
ADF4207
ADF4208
ADF4206 (RF1, RF2)
ADF4207 (RF1, RF2)
ADF4207 (RF1, RF2)
ADF4208 (RF1)
ADF4208 (RF1)
ADF4208 (RF1)
ADF4208 (RF2)
RF1, RF2 (20 kHz Loop B/W)
RF1, RF2 (1 kHz Loop B/W)
= 10 MHz; f
= 10 MHz; f
DD
2 = 3 V; For V
PFD
PFD
= 30 kHz; Offset Frequency = 300 Hz; f
= 10 kHz; Offset Frequency = 200 Hz; f
10
DD
DD
= 3 V; P = 32; RF1
1 = V
7
9
8
DD
2 = 5 V, use CMOS-compatible levels.
IN
1/RF2
IN
2 for ADF4206 = 540 MHz; RF1
B Version
–169
–171
–173
–160
–162
–164
–92
–90
–81
–85
–91
–66
–89
–80/–84
–65/–73
RF/IF
RF
= 1750 MHz; N = 175000; Loop B/W = 1 kHz.
= 836 MHz; N = 27866; Loop B/W = 3 kHz.
B Chips
–169
–171
–173
–160
–162
–164
–92
–90
–81
–85
–91
–66
–89
–80/–84
–65/–73
2
IN
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dBc/Hz typ
dB typ
dB typ
Unit
1/RF2
IN
2 for ADF4207 = 900 MHz; RF1
REFOUT
@ 25 kHz PFD Frequency
@ 25 kHz PFD Frequency
@ 25 kHz PFD Frequency
@ 200 kHz PFD Frequency
@ 200 kHz PFD Frequency
@ 200 kHz PFD Frequency
@ 540 MHz Output, 200 kHz at PFD
@ 900 MHz Output, 200 kHz at PFD
@ 836 MHz, 30 kHz at PFD
@ 1750 MHz Output, 200 kHz at PFD
@ 900 MHz Output, 200 kHz at PFD
@ 1750 MHz Output, 200 kHz at PFD
@ 900 MHz Output, 200 kHz at PFD
@ 200 kHz/400 kHz and 200 kHz PFD
@10 kHz/20 kHz and 10 kHz PFD
Test Conditions/Comments
@ VCO Output
ADF4206/ADF4207/ADF4208
= 10 MHz @ 0 dBm).
IN
1/RF2
IN
2 for ADF4208 = 900 MHz.