AD5122A 查看數據表（PDF） - Analog Devices

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AD5122A

Dual Channel, 128-/256-Position, I2C, Nonvolatile Digital Potentiometer

Analog Devices 

AD5122A/AD5142A

Data Sheet

ELECTRICAL CHARACTERISTICS—AD5142A

VDD = 2.3 V to 5.5 V, VSS = 0 V; VDD = 2.25 V to 2.75 V, VSS = −2.25 V to −2.75 V; VLOGIC = 1.8 V to 5.5 V, −40°C < TA < +125°C, unless

otherwise noted.

Table 3.

Parameter

Symbol

Test Conditions/Comments Min

DC CHARACTERISTICS—RHEOSTAT

MODE (ALL RDACs)

Resolution

N

8

Resistor Integral Nonlinearity2

R-INL

RAB = 10 kΩ

VDD ≥ 2.7 V

−2

VDD < 2.7 V

−5

RAB = 100 kΩ

VDD ≥ 2.7 V

−1

VDD < 2.7 V

−2

Resistor Differential Nonlinearity2

R-DNL

−0.5

Nominal Resistor Tolerance

ΔRAB/RAB

−8

Resistance Temperature Coefficient3

(ΔRAB/RAB)/ΔT × 106 Code = full scale

Wiper Resistance3

RW

Code = zero scale

RAB = 10 kΩ

RAB = 100 kΩ

Bottom Scale or Top Scale

RBS or RTS

RAB = 10 kΩ

RAB = 100 kΩ

Nominal Resistance Match

RAB1/RAB2

Code = 0xFF

−1

DC CHARACTERISTICS—POTENTIOMETER

DIVIDER MODE (ALL RDACs)

Integral Nonlinearity4

INL

RAB = 10 kΩ

−1

RAB = 100 kΩ

−0.5

Differential Nonlinearity4

DNL

−0.5

Full-Scale Error

VWFSE

RAB = 10 kΩ

−2.5

RAB = 100 kΩ

−1

Zero-Scale Error

VWZSE

RAB = 10 kΩ

Voltage Divider Temperature

Coefficient3

RAB = 100 kΩ

(ΔVW/VW)/ΔT × 106 Code = half scale

Typ1 Max

±0.2 +2

±1.5 +5

±0.1 +1

±0.5 +2

±0.2 +0.5

±1 +8

35

55 125

130 400

40 80

60 230

±0.2 +1

±0.2 +1

±0.1 +0.5

±0.2 +0.5

−0.1

±0.2 +1

1.2 3

0.5 1

±5

Unit

Bits

LSB

LSB

LSB

LSB

LSB

%

ppm/°C

Ω

Ω

Ω

Ω

%

LSB

LSB

LSB

LSB

LSB

LSB

LSB

ppm/°C

Rev. A | Page 6 of 32

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