AD9531 datasheet(23/88 Pages) AD

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Data Sheet

AD9531

Pin No.

Mnemonic

Supply Domain

Description

REF1_AN

3.3 V

PLL1 REF_A Input (Negative). When operating the REF_A input in single-ended mode, this

pin becomes inoperative (internally disconnected) and must be connected to ground or

left floating.

REF1_SEL

3.3 V

PLL1 Manual REF_A/REF_B Input Select.

REF1_BP

3.3 V

PLL1 REF_B Input (Positive). Use this pin when operating the REF_B input in single-ended

mode.

REF1_BN

3.3 V

PLL1 REF_B Input (Negative). When operating the REF_B input in single-ended mode, this

pin becomes inoperative (internally disconnected) and must be connected to ground or

left floating.

VDD1

1.8 V

PLL1 Power Supply for the Input Circuitry Following the REF1_A/REF1_B Receivers.

VDD1_3V3

3.3 V

PLL1 Power Supply for the Low Dropout (LDO) Input.

LDOREG1

3.3 V

PLL1 LDO Regulated Supply for the VCO Core. Connect a 220 nF capacitor between this pin

and ground.

3.3 V

Loop Filter.

RFIN1_P

3.3 V

PLL1 External VCO/VCXO Input (Positive).

RFIN1_N

3.3 V

PLL1 External VCO/VCXO Input (Negative).

VDD1

1.8 V

PLL1 Power Supply for the Output Distribution Circuitry.

OUT1_0P

1.8 V

PLL1 Output 0 (Positive).

OUT1_0N

1.8 V

PLL1 Output 0 (Negative).

OUT1_1P

1.8 V

PLL1 Output 1 (Positive).

OUT1_1N

1.8 V

PLL1 Output 1 (Negative).

VDD1_03

1.8 V

PLL1 Power Supply for Channel Outputs OUT1_0 Through OUT1_3.

OUT1_2P

1.8 V

PLL1 Output 2 (Positive).

OUT1_2N

1.8 V

PLL1 Output 2 (Negative).

OUT1_3P

1.8 V

PLL1 Output 3 (Positive).

OUT1_3N

1.8 V

PLL1 Output 3 (Negative).

OUT1_4P

1.8 V

PLL1 Output 4 (Positive).

OUT1_4N

1.8 V

PLL1 Output 4 (Negative).

OUT1_5P

1.8 V

PLL1 Output 5 (Positive).

OUT1_5N

1.8 V

PLL1 Output 5 (Negative).

VDD1_47

1.8 V

PLL1 Power Supply for Channel Outputs OUT1_4 Through OUT1_7.

OUT1_6P

1.8 V

PLL1 Output 6 (Positive).

OUT1_6N

1.8 V

PLL1 Output 6 (Negative).

OUT1_7P

1.8 V

PLL1 Output 7 (Positive).

OUT1_7N

1.8 V

PLL1 Output 7 (Negative).

LDET1/M1

1.8 V/3.3 V

PLL1 Lock Detect. This is a multifunction pin.

OUT1_8P

1.8 V

PLL1 Output 8 (Positive).

OUT1_8N

1.8 V

PLL1 Output 8 (Negative).

VDD1_89

1.8 V

PLL1 Power Supply for Channel Outputs OUT1_8 Through OUT1_9.

OUT1_9P

1.8 V

PLL1 Output 9 (Positive).

OUT1_9N

1.8 V

PLL1 Output 9 (Negative).

LDET3/M3

1.8 V/3.3 V

PLL3 Lock Detect. This is a multifunction pin.

VDD3

1.8 V

PLL3 Power Supply for Input Circuitry of the First PLL in the 2 PLL Cascade of PLL3.

REF3_P

1.8 V

PLL3 Reference Input (Positive).

REF3_N

1.8 V

PLL3 Reference Input (Negative).

VDD3

1.8 V

PLL3 Power Supply for the Output Circuitry of PLL3A and Input Circuitry of PLL3B.

OUT3_0

1.8 V/3.3 V

PLL3 Output 0.

VDD3_01

1.8 V

PLL3 Power Supply for Channel Outputs OUT3_0 Through OUT3_1.

VDD3_3V3

3.3 V

PLL3 Power Supply for the Output Circuitry.

OUT3_1P

1.8 V/3.3 V

PLL3 Output 1 (Positive).

OUT3_1N

1.8 V/3.3 V

PLL3 Output 1 (Negative).

VDD2_3V3

3.3 V

PLL2 Power Supply for the LDO Input.

LDOREG2

1.8 V

PLL2 LDO Regulated Supply for the VCO Core. Connect a 220 nF capacitor between this pin

and ground.

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