EVAL-AD5755-1SDZ Просмотр технического описания (PDF) - Analog Devices

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EVAL-AD5755-1SDZ

Quad Channel, 16-Bit, Serial Input, 4 mA to 20 mA Output DAC, Dynamic Power Control, HART Connectivity

Analog Devices 

Data Sheet

AD5757

Pin No.

49

51

54

56

57

58

59

61

62

63

64

Mnemonic

IGATEC

CHARTC

IOUT_D

VBOOST_D

COMPDCDC_D

IGATED

CHARTD

REFIN

REFOUT

RSET_D

RSET_C

EPAD

Description

Optional Connection for External Pass Transistor. Leave unconnected when using the dc-to-dc converter. See

the External PMOS Mode section for more information.

HART Input Connection for DAC Channel C. For more information, see the HART section. If unused, leave as an

open circuit.

Current Output Pin for DAC Channel D.

Supply for Channel D Current Output Stage (see Figure 50). To use the dc-to-dc feature of the device, connect as

shown in Figure 57.

DC-to-DC Compensation Capacitor. Connect a 10 nF capacitor from this pin to ground. Used to regulate the

feedback loop of the Channel D dc-to-dc converter. Alternatively, if using an external compensation resistor,

place a resistor in series with a capacitor to ground from this pin (see the DC-to-DC Converter Compensation

Capacitors and AICC Supply Requirements—Slewing sections in t section for more information).

Optional Connection for External Pass Transistor. Leave unconnected when using the dc-to-dc converter. See

the External PMOS Mode section for more information.

HART Input Connection for DAC Channel D. For more information, see the HART section. If unused, leave as an

open circuit.

External Reference Voltage Input.

Internal Reference Voltage Output. It is recommended to place a 0.1 µF capacitor between REFOUT and

REFGND. REFOUT must be connected to REFIN to use the internal reference.

An external, precision, low drift 15 kΩ current setting resistor can be connected to this pin to improve the IOUT_D

temperature drift performance. See the Device Features section.

An external, precision, low drift 15 kΩ current setting resistor can be connected to this pin to improve the IOUT_C

temperature drift performance. See the Device Features section.

Exposed Pad. This exposed pad must be connected to AGND, or, alternatively, it can be left electrically

unconnected. It is recommended that the pad be thermally connected to a copper plane for enhanced

thermal performance.

Rev. G | Page 13 of 45

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