For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824

Phone: 978-250-3343

Fax: 978-250-3373

Order On-line at www.hittite.com

Application Support: Phone: 978-250-3343 or apps@hittite.com

21

HMC1197LP7FE

v00.0912

WIDEBAND DIRECT QUADRATURE MODULATOR

w/ FRACTIONAL-N PLL & VCO, 100 - 4000 MHz

Reg 0Bh PD/CP Register

BIT

TYPE

NAME

W

DEFLT

DESCRIPTION

[3:0]

R/W

Reserved

4

1

Reserved

[4]

R/W

PD Phase Select

1

0

Inverts the PD polarity (program to 0)

0- Use with a positive tuning slope VCO and Passive Loop Filter

(default)

1- Use with a Negative Slope VCO or with an inverting Active Loop

Filter with a Positive Slope VCO

[5]

R/W

PD Up Output Enable

1

1

[6]

R/W

PD Down Output Enable

1

0

Enables the PD DN output, see alsoReg 0Bh Reg 7h [10]

[8:7]

R/W

Reserved

2

0

Reserved, Program to 0d.

[9]

R/W

Force CP UP

1

0

Forces CP UP output on if CP is not forced down - Use for Test

only

[10]

R/W

Force CP DN

1

0

Forces CP DN output on if CP is not forced up - Use for Test only

[11]

R/W

Force CP MId Rail

1

0

Force CP MId Rail - Use for Test only (if Force CP UP or Force CP

DN are enabled they have precedence)

[23:12]

R/W

Reserved

12

124d

7Ch

Reserved. Program to 78h

Reg 0Ch Exact Frequency Register

BIT

TYPE

NAME

W

DEFLT

DESCRIPTION

[23:0]

R/W

Number of Channels per Fpd

24

0

Comparison Frequency divided by the correction rate. Must be

an integer. Frequencies at exactly the correction rate will have

zero frequency error. Only works in modulator Mode B. Must be 0

otherwise

0: Disabled

1: Invalid

≥ 2 valid