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5nH

to 9nH

3.2pF

to 4.8pF

IN

OUT

IN

P

1.5pF to

2.5pF

1

Ω

15

Ω

to 25

Ω

5nH

to 9nH

IN

N

1.5pF to

2.5pF

1

Ω

15

Ω

to 25

Ω

60

Ω

to 120

Ω

1.5pF

to 1.9pF

IN

OUT

3.2pF

to 4.8pF

IN

OUT

15

Ω

to 25

Ω

15

Ω

to 25

Ω

60

Ω

to 120

Ω

IN

OUT

IN

OUT

15

Ωto 35Ω

IN

OUT

IN

OUT

OUT

P

OUT

N

Switches that are ON

in SAMPLE phase.

Switches that are ON

in HOLD phase.

V

IN

IN

IN

CM

+1.5V

24.9

Ω

24.9

Ω

0.1

µF

22pF

R

T

1:n

0.1

µF

R

G

R

2

R

1

OPA690

49.9

Ω

1/2

ADS5232

One Channel of Two

ADS5232

SBAS294A – JUNE 2004 – REVISED MARCH 2006

Figure 18. Input Circuitry

Figure 19. Converting a Single-Ended Input Signal into a Differential Signal Using an RF-Transformer

19

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