ADA4255ACPZ-R7 datasheet(61/64 Pages) AD

部品番号	ADA4255ACPZ-R7

部品情報	Zero Drift, High Voltage, Programmable Gain Instrumentation Amplifier with Charge Pump

PDF	64 Pages

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メーカー	AD [Analog Devices]

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61 / 64 page

Data Sheet

ADA4255

analog.com

Rev. 0 | 61 of 64

EXCITATION CURRENT CONFIGURATION

Table 33. EX_CURRENT_CFG Register Details (Register 0x0F)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Bit Name

EX_CURRENT_SEL[1:0]

Reserved

EX_CURRENT[3:0]

Access

R/W

Reserved

R/W

Reset

Reserved

Bits[7:6], EX_CURRENT_SEL[1:0]—Excitation

Current Connection Configuration

EX_CURRENT_SEL[1:0] configures internal current source IOUT.

Table 34 shows all available configurations. When IOUT is used,

the source of this current is AVDD.

Table 34. Excitation Current Source Connections

EX_CURRENT_SEL[1:0]

Current Source

0b00

None

0b01

IOUT

0b10

None

0b11

IOUT

Bits[3:0], EX_CURRENT[3:0]—Excitation

Current Value

The EX_CURRENT[3:0] bits configure the current source value

connected via the EX_CURRENT_SEL bits. Table 35 shows all the

possible current values.

Table 35. Excitation Current Values

EX_CURRENT[3:0]

Excitation Current Value

0x0

0 μA

0x1

100 µA

0x2

200 µA

0x3

300 µA

0x4

400 µA

0x5

500 µA

0x6

600 µA

0x7

700 µA

0x8

800 µA

0x9

900 µA

0xA

1 mA

0xB

1.1 mA

0xC

1.2 mA

0xD

1.3 mA

0xE

1.4 mA

0xF

1.5 mA

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