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AD5421

16-Bit, Serial Input, Loop-Powered, 4 mA to 20 mA DAC

Analog Devices 

AD5421

Data Sheet

SPECIFICATIONS

Loop voltage = 24 V; REFIN = 2.5 V external; RL = 250 Ω; external NMOS connected; all loop current ranges; all specifications

TMIN to TMAX, unless otherwise noted.

Table 1.

Parameter1

ACCURACY, INTERNAL RSET

Resolution

Total Unadjusted Error (TUE)2

TUE Long-Term Stability

Relative Accuracy (INL)

Differential Nonlinearity (DNL)

Offset Error

Offset Error TC3

Gain Error

Gain Error TC3

Full-Scale Error

Full-Scale Error TC3

Downscale Alarm Current

Upscale Alarm Current

ACCURACY, EXTERNAL RSET (24 kΩ)

Resolution

Total Unadjusted Error (TUE)2

TUE Long-Term Stability

Relative Accuracy (INL)

Differential Nonlinearity (DNL)

Offset Error

Offset Error TC3

Gain Error

Min

16

−0.126

−0.041

−0.18

−0.06

−0.27

−0.08

−0.0035

−0.012

−0.024

−1

−0.056

−0.008

−0.11

−0.107

−0.035

−0.2

−0.126

−0.041

−0.25

3.19

22.77

23.97

16

−0.048

−0.027

−0.08

−0.04

−0.0035

−0.012

−1

−0.021

−0.007

−0.03

−0.023

Typ

±0.0064

±0.011

±0.011

210

±0.0015

±0.006

±0.01

±0.0008

±0.0008

1

±0.0058

±0.0058

4

±0.0065

±0.0065

5

±0.002

±0.003

40

±0.0015

±0.006

±0.0012

0.5

±0.0006

Max

+0.126

+0.041

+0.18

+0.06

+0.27

+0.08

+0.0035

+0.012

+0.024

+1

+0.056

+0.008

+0.11

+0.107

+0.035

+0.2

+0.126

+0.041

+0.25

3.21

22.83

24.03

+0.048

+0.027

+0.08

+0.04

+0.0035

+0.012

+1

+0.021

+0.007

+0.03

+0.023

Unit

Test Conditions/Comments

Bits

% FSR

% FSR

% FSR

% FSR

% FSR

ppm FSR

% FSR

% FSR

% FSR

LSB

% FSR

% FSR

% FSR

ppm FSR/°C

% FSR

% FSR

% FSR

ppm FSR/°C

% FSR

% FSR

% FSR

ppm FSR/°C

mA

mA

mA

Bits

% FSR

% FSR

% FSR

% FSR

ppm FSR

% FSR

% FSR

LSB

% FSR

% FSR

ppm FSR/°C

% FSR

% FSR

C grade

C grade, TA = 25°C

B grade

B grade, TA = 25°C

A grade

A grade, TA = 25°C

Drift after 1000 hours at TA = 125°C

C grade

B grade

A grade

Guaranteed monotonic

B grade and C grade

B grade and C grade, TA = 25°C

A grade

B grade and C grade

B grade and C grade, TA = 25°C

A grade

B grade and C grade

B grade and C grade, TA = 25°C

A grade

4 mA to 20 mA and 3.8 mA to 21 mA

ranges

3.2 mA to 24 mA range

Assumes ideal resistor, B grade and

C grade only; not specified for A grade

C grade

C grade, TA = 25°C

B grade

B grade, TA = 25°C

Drift after 1000 hours at TA = 125°C

C grade

B grade

Guaranteed monotonic

TA = 25°C

TA = 25°C

Rev. H | Page 4 of 36

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