AD5674/AD5674R/AD5679/AD5679R

Data Sheet

Rev. B | Page 6 of 32

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

REFERENCE OUTPUT

AD5679R-1; AD5679R-2

Output Voltage5

2.4975

2.5025

V

Voltage Reference TC6, 7

2

5

ppm/°C

See the Terminology section

Output Impedance

0.04

Ω

Output Voltage Noise

13

µV p-p

0.1 Hz to 10 Hz

Output Voltage Noise Density

240

nV/√Hz

At TA, f = 10 kHz, CL = 10 nF, gain = 1 or 2

Load Regulation Sourcing

29

µV/mA

At ambient temperature

Load Regulation Sinking

74

µV/mA

At ambient temperature

Output Current Load Capability

±20

mA

VDD ≥ 3 V

Line Regulation

43

µV/V

At ambient temperature

Long-Term Stability Drift

77

ppm

After 1000 hours at 25°C

Thermal Hysteresis

125

ppm

First cycle

25

ppm

Additional cycles

LOGIC INPUTS

Input Current

±1

µA

Per pin

VIN

VINL

0.3 × VLOGIC

V

VINH

0.7 ×

VLOGIC

V

Pin Capacitance

4

pF

LOGIC OUTPUTS (SDO)

VOUT

VOL

0.4

V

ISINK = 200 μA

VOH

VLOGIC −

0.4

V

ISOURCE = 200 μA

Floating State Output Capacitance

9

pF

POWER REQUIREMENTS

VLOGIC

1.62

5.5

V

ILOGIC

1

µA

Power-on, −40°C to +105°C

1.3

µA

Power-on, −40°C to +125°C

0.5

µA

Power-down, −40°C to +105°C

1.3

µA

Power-down, −40°C to +125°C

VDD

2.7

5.5

V

Gain = 1

VREF + 1.5

5.5

V

Gain = 2

IDD

VINH = VDD, VINL = GND, VDD = 2.7 V to 5.5 V

Normal Mode8

2.3

2.53

mA

Internal reference off, −40°C to +85°C

3.4

3.8

mA

Internal reference on, −40°C to +85°C

2.3

2.6

mA

Internal reference off

3.4

4.2

mA

Internal reference on

All Power-Down Modes9

2

3.4

µA

Power-down to 1 kΩ, −40°C to +85°C

2

5

µA

Power-down to 1 kΩ, −40°C to +105°C

2

11

µA

Power-down to 1 kΩ, −40°C to +125°C

1

DC specifications tested with the outputs unloaded, unless otherwise noted. Upper dead band = 10 mV and exists only when VREF = VDD with gain = 1, or when VREF/2 =

VDD with gain = 2. Linearity calculated using a reduced code range of 256 to 65,280.

2

VDD = 5 V. The device includes current limiting intended to protect the devices during temporary overload conditions. TJ can be exceeded during current limit.

Operation above the specified maximum operation junction temperature can impair device reliability.

3

When drawing a load current at either rail, the output voltage headroom with respect to that rail is limited by the 25 Ω typical channel resistance of the output

devices. For example, when sinking 1 mA, the minimum output voltage = 25 Ω × 1 mA = 25 mV.

4

Time to exit power-down to normal mode of operation, SYNC rising edge to 90% of DAC midscale value, with output unloaded.

5

Initial accuracy presolder reflow is ±750 µV. Output voltage includes the effects of preconditioning drift. See the Internal Reference Setup section.

6

Reference is trimmed and tested at two temperatures and is characterized from −40°C to +125°C.

7

Voltage reference temperature coefficient is calculated as per the box method. See the Terminology section for further information.

8

Interface inactive. All DACs active. DAC outputs unloaded.

9

All DACs powered down.