TLC251, TLC251A, TLC251B, TLC251Y

LinCMOS

™ PROGRAMMABLE

LOW-POWER OPERATIONAL AMPLIFIERS

SLOS001E – JULY 1983 – REVISED AUGUST 1994

13

POST OFFICE BOX 655303

TLC251Y

PARAMETER

TEST CONDITIONS

HIGH-BIAS

MODE

MEDIUM-BIAS

MODE

LOW-BIAS

MODE

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

SR

Slew rate at

RL†,

VI(PP) = 1 V

3.6

0.43

0.03

V/

µs

SR

unity gain

L ,

CL = 20 pF

VI(PP) = 2.5 V

2.9

0.40

0.03

V/

µs

Vn

Equivalent input

noise voltage

f = 1 kHz,

RS = 20 Ω

25

32

68

nV/

√Hz

BOM

Maximum output

swing bandwidth

VO = VOH,

RL = 10 kΩ

CL = 20 pF,

320

55

4.5

kHz

B1

Unity-gain

bandwidth

VI = 10 mV,

CL = 20 pF

1700

525

65

kHz

φm

Phase margin

f = B1,

CL = 20 pF

VI = 10 mV,

46

°

40

°

34

°

† For high-bias mode, RL = 10 kΩ; for medium-bias mode, RL = 100 kΩ; and for low-bias mode, RL = 1 MΩ.

PARAMETER MEASUREMENT INFORMATION

Figure 1. Unity-Gain Amplifier

–

+

Output

Input

CL = 100 pF

RL

BIAS

RL

Low

1 M

Ω

Medium

100 k

Ω

High

10 k

Ω

Figure 2. Input Offset Voltage Null Circuit

–

+

25 k

Ω

N1

N2

IN –

IN +

Output

GND

TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

IDD

Supply current

vs Bias-select voltage

vs Supply voltage

3

4

IDD

Supply current

vs Supply voltage

vs Free-air temperature

4

5

Low bias

vs Frequency

6

AVD

Large-signal differential voltage amplification

Medium bias

vs Frequency

7

High bias

vs Frequency

8

Low bias

vs Frequency

6

Phase shift

Medium bias

vs Frequency

7

High bias

vs Frequency

8