AD4134BCPZ datasheet(58/92 Pages) AD

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Data Sheet

AD4134

APPLICATIONS INFORMATION

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Rev. 0 | 58 of 92

Figure 94. Typical Application Diagram

POWER SUPPLY

The AD4134 has a total of seven power supply input pins: AVDD5,

DVDD5, LDOIN, AVDD1V8, DVDD1V8, CLKVDD, and IOVDD.

Refer to the power supply voltages in Table 1 for operating supply

voltage values for 4.096 V and 5 V reference inputs.

To simplify the power supply design, the user can supply the

AVDD5 pin and DVDD5 pin together with a single, low noise

5 V supply, and supply the AVDD1V8, DVDD1V8, CLKVDD, and

IOVDD pins together with a single low noise 1.8 V supply.

To generate 5 V and 1.8 V rails, the power circuits using LT8606

or LT8607 provide a low EMI, small size solution supporting a wide

range of input voltages.

On-Board LDO Regulators

To simplify the power supply design, the AD4134 provides three

internal LDO regulators to generate the 1.8 V required for the

AVDD1V8, DVDD1V8, and CLKVDD pins from a single 2.6 V to 5.5

V supply connected to the LDOIN pin, as shown in Figure 95.

Figure 95. Internal LDO Regulator Connections

If the internal LDO regulators are used, the AVDD1V8, DVDD1V8,

and CLKVDD pins must be decoupled with a 10 µF, 10 µF, and 2.2

µF capacitor, respectively, to their respective grounds, as shown in

Figure 96.

AD4134BCPZ Datasheet(PDF) 58 Page - Analog Devices