CS4373A

6

DS699F2

ANALOG CHARACTERISTICS

Notes: 6. Maximum integrated noise over the measurement bandwidth for the voltage reference device attached

to the VREF

7. Load on the precision OUT

1G

Ω/1 TΩ typical input impedance and 18 pF typical input capacitance.

8. Guaranteed by design and/or characterization.

9. Single-ended output impedance at 1/64 is different for BUF+ and BUF- due to the output attenuator

architecture.

Parameter

Symbol

Min

Typ

Max

Unit

VREF Input

{VREF+} - {VREF-}

(Note 2, 3)

VREF

-

2.500

-

V

VREF-

(Note 4)VREF-

-

VA -

-

V

VREF Input Current, AC modes

-80-

µA

VREF Input Current, DC modes

-40-

µA

VREF Input Noise

--

1

Analog OUT± Output

Analog External Load at OUT

±

Load Resistance

(Note 7, 8)

Load Capacitance

50

-

-

-

-

50

M

Ω

pF

Differential Output Impedance

1/1

1/2

1/4

1/8

1/16

1/32

1/64

-

-

-

-

-

-

-

1.4

10.1

7.9

5.1

3.3

2.3

1.7

-

-

-

-

-

-

-

k

Ω

k

Ω

k

Ω

k

Ω

k

Ω

k

Ω

k

Ω

Single-ended Output Impedance

1/1

1/2

1/4

1/8

1/16

1/32

1/64

-

-

-

-

-

-

-

0.7

7.4

9.0

9.4

9.5

9.5

9.4

-

-

-

-

-

-

-

k

Ω

k

Ω

k

Ω

k

Ω

k

Ω

k

Ω

k

Ω

High-Z Impedance

-3

-

M

Ω

Crosstalk to BUF

(Note 8)

--120-

dB

Analog BUF± Output

Analog External Load at BUF

±

Load Resistance

(Note 8)

Load Capacitance

1

-

-

-

-

2

k

Ω

nF

Differential Output Impedance

1/1 - 1/64

-6

-

Ω

Single-ended Output Impedance

1/1 - 1/32

(Note 9) (BUF-) 1/64

(Note 9) (BUF+) 1/64

-

-

-

3

3

50

-

-

-

Ω

High-Z Impedance

-4.5

-

M

Ω

Crosstalk to OUT

(Note 8)

--120-

dB