AD8349 データシートの表示（PDF） - Analog Devices

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AD8349

700 MHz to 2700 MHz Quadrature Modulator

Analog Devices 

AD8349

Data Sheet

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

IBBP 1

16 QBBP

IBBN 2

15 QBBN

COM1 3

14 COM3

COM1 4 AD8349 13 COM3

TOP VIEW

LOIN 5 (Not to Scale) 12 VPS2

LOIP 6

11 VOUT

VPS1 7

10 COM3

ENOP 8

9 COM2

NOTES

1. CONNECT EXPOSED PAD TO THE GROUND LANE

VIA A LOW IMPEDANCE PATH.

Figure 2.

Table 3. Pin Function Descriptions

Pin No.

1, 2,

15, 16

Mnemonic

IBBP, IBBN,

QBBN, QBBP

3, 4

COM1

5, 6

LOIN, LOIP

7

VPS1

8

ENOP

9

COM2

10, 13,

14

11

COM3

VOUT

12

VPS2

EP

Description

Differential In-Phase and Quadrature Baseband Inputs. These high impedance inputs must be

dc-biased to approximately 400 mV dc, and must be driven from a low impedance source.

Nominal characterized ac signal swing is 600 mV p-p on each pin (100 mV to 700 mV). This

results in a differential drive of 1.2 V p-p with a 400 mV dc bias. These inputs are not self-biased

and must be externally biased.

Common Pin for LO Phase Splitter and LO Buffers. COM1, COM2, and COM3 should all be

connected to a ground plane via a low impedance path.

Differential Local Oscillator Inputs. Internally dc-biased to approximately 1.8 V when VS = 5.0 V.

Pins must be ac-coupled. Single-ended drive is possible with degradation in performance.

Positive Supply Voltage (4.75 V to 5.5 V) for the LO Bias-Cell and Buffer. VPS1 and VPS2 should be

connected to the same supply. To ensure adequate external bypassing, connect 0.1 μF and 100

pF capacitors between VPS1 and ground.

Output Enable. This pin can be used to enable or disable the RF output. Connect to high logic

level for normal operation. Connect to low logic level to disable output.

Common Pin for the Output Amplifier. COM1, COM2, and COM3 should all be connected to a

ground plane via a low impedance path.

Common Pin for Input V-to-I Converters and Mixer Cores. COM1, COM2, and COM3 should all be

connected to a ground plane via a low impedance path.

Device Output. Single-ended, 50 Ω internally biased RF output. Pin must be ac-coupled to the

load.

Positive Supply Voltage (4.75 V to 5.5 V) for the Baseband Input V-to-I Converters, Mixer Core,

Band Gap Reference, and Output Amplifer. VPS1 and VPS2 should be connected to the same

supply. To ensure adequate external bypassing, connect 0.1 μF and 100 pF capacitors between

VPS2 and ground.

Exposed Paddle. Connect to the ground plane via a low impedance path.

Equivalent

Circuit

Circuit A

Circuit B

Circuit C

Circuit D

Rev. B | Page 6 of 28

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