REF200 datasheet(9/15 Pages) BURR-BROWN

9 / 15 page

REF200

100µA

Reference

–V

100µA

0.01µF

(N • R )

= N • 100µA

OUT

(1)

(N • R )

= N • 100µA

OUT

(1)

100µA

0.01µF

100µA

OPA602

0.01µF

I = (N +1) 100µA

0.01µF

I = (N +1) 100µA

100µA

OPA602

0.01µF

I = (N +1) 100µA

10pF

(a)

(b)

(d)

(c)

(e)

–V

OPA602

RNR

OUT

Ω

500

µA

Ω

1mA

100k

Ω

9.9k

Ω

10mA

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) Burr Brown® OPA602 or OPA128

EXAMPLES

OUT

100

Ω

10M

Ω

1nA

10k

Ω

µA

10k

Ω

1mA

Use OPA128

O = 100µA (N + 1). Compliance ≈ 3.5V

with 0.1V across R. Max I

limited by FET.

For I

O = 1A, R = 0.1Ω, NR = 1kΩ.

FIGURE 10. Adjustable Current Sources.

REF200 Datasheet(PDF) 9 Page - Burr-Brown (TI)

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