REF200 datasheet(16/34 Pages) TI1

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100 µA

Reference

–V

100 µA

0.01 µF

(N • R )

= N • 100 µA

OUT

(1)

(N • R )

= N • 100 µA

OUT

(1)

100 µA

0.01 µF

100 µA

OPA602

0.01 µF

I = (N +1) 100 µA

0.01 µF

I = (N +1) 100 µA

100 µA

OPA602

0.01 µF

I = (N +1) 100 µA

10 pF

(a)

(b)

(d)

(c)

(e)

–V

OPA602

OUT

1 k

4 k

500 A

1 k

9 k

1 mA

100 k

9.9 k

10 mA

EXAMPLES

FEATURES:

(1) Zero volts shunt compliance.

(2) Adjustable only to values above

reference value.

NOTE:

Current source/sink swing to the

Load Return

rail is limited only

by the op amp's input common

mode range and output swing

capability. Voltage drop across R

can be tailored for any amplifier to

allow swing to zero volts from rail.

NOTE: (1) OPA602 or OPA128

EXAMPLES

OUT

100

10 M

1 nA

10 k

1 M

1 A

10 k

1 k

1 mA

Use OPA128

I = 100 A (N + 1). Compliance » 3.5 V

with 0.1 V across R. Max I limited by FET.

For I = 1 A, R = 0.1

, NR = 1 k .

REF200

SBVS020B – SEPTEMBER 2000 – REVISED JULY 2015

www.ti.com

System Examples (continued)

Figure 25. Adjustable Current Sources

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