AD9551BCPZ Analog Devices Inc, AD9551BCPZ Datasheet - Page 35

• Manufacturer Part Number: AD9551BCPZ
• Description: IC, CLOCK GENERATOR, 806MHZ, LFCSP-40
• Manufacturer: Analog Devices Inc

Specifications of AD9551BCPZ

• Clock Ic Type: Clock Generator
• Ic Interface Type: SCI
• Frequency: 806MHz
• No. Of Outputs: 2
• Supply Current: 169mA
• Digital Ic Case Style: LFCSP
• No. Of Pins: 40
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Input Receiver and Band Gap (Register 0x1A)
Table 27.
Address
0x1A
DCXO Control (Register 0x1B to Register 0x1D)
Table 28.
Address
0x1B
0x1C
0x1D
Bit
7
[6:2]
1
0
Bit
7
6
[5:0]
[7:0]
[7:3]
2
1
0
Bit Name
Receiver reset
Band gap voltage adjust
Enable receiver power-down
Enable SPI control of band gap
voltage
Bit Name
Disable SPI control of DCXO
tuning capacitor
Enable SPI control of DCXO
varactor
DCXO tuning capacitor control
DCXO varactor control
DCXO varactor control
Select 2× frequency multiplier
DCXO bypass
Unused
Description
Input receiver reset control. This is an autoclearing bit.
Controls the option to power down the REFA and/or REFB receiver via Register 0x26[4]
and Register 0x1E[4], respectively.
0 = option disabled (default).
1 = option enabled.
Enables functionality of Bits[6:2].
0 = the device automatically selects receiver band gap voltage (default).
1 = Bits[6:2] define the receiver band gap voltage.
Description
Disables functionality of Bits[5:0].
0 = tuning capacitance defined by Bits[5:0].
1 = the device automatically selects DCXO tuning capacitance (default).
Enables functionality of Register 0x1C and Register 0x1D[7:3].
0 = the device automatically selects DCXO varactor (default).
1 = varactor defined by Register 0x1C[7:0] and Register 0x1D[7:3].
Higher binary values correspond to smaller total capacitance, resulting in a higher
operating frequency. Default is 00 0000.
Bits[12:5] of the 13-bit varactor control word.
Bits[4:0] of the 13-bit varactor control word. The default varactor control word is
0 0000 0000 0000.
Select/bypass the 2× frequency multiplier.
0 = bypassed (default).
1 = selected.
Select/bypass the DCXO.
0 = selected (default).
1 = bypassed.
Unused.
0 = normal operation (default).
1 = reset input receiver logic.
Controls the band gap voltage setting from minimum (0 0000) to maximum (1 1111).
Default is 0 0000.
Rev. B | Page 35 of 40
AD9551