ꢀ
ꢀ
ꢀ
ꢁ
ꢁ
ꢁ
ꢂ
ꢇ
ꢊ
ꢃ
ꢃ
ꢃ
ꢄꢅ
ꢄꢅ
ꢄꢅ
ꢆ
ꢈ
ꢈ
ꢉ ꢀ ꢁꢇ ꢃ ꢄ ꢅ ꢆ
ꢉ ꢀ ꢁ ꢊꢃꢄ ꢅ ꢆ
SLUS329B − JUNE 1998 − REVISED FEBRUARY 2005
ELECTRICAL CHARACTERISTICS
V
= 18 V, R = 8.2 kΩ, C = 1.5 nF, V = 1 V, V
PKLMT VRMS
= 1.5 V, I
IAC
= 100 µA, I
ISENSE
= 0 V, V
CAO
= 3.5 V, V
VAO
= 5 V, V = 3 V,
VSENSE
CC
T
T
−40°C < T < 85°C for the UC2854A and UC2854B, and 0°C < T <70°C for the UC3854A and UC3854B, and T = T (unless otherwise
A
A
A
J
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OVERALL
Supply current, off
Supply current, on
CAO = 0 V,
VAO = 0 V,
−0.3 V
UVLO
250
400
µA
V
CC
= V
12
16.0
10.5
10
18
17.5
11.2
12
mA
UCx854A
UCx854B
15.0
8.0
9
V
CC
turn-on threshold voltage
V
V
V
turn-off threshold voltage
clamp
CC
I
= I
+ 5 mA
18
20
22
CC
VCC VCC(on)
VOLTAGE AMPLIFIER
Input voltage
2.9
−500
70
3.0
−25
100
6
3.1
V
nA
dB
V
V
bias current
500
SENSE
Open loop gain
2 V ≤ V
≤ 5 V
OUT
V
V
High-level output voltage
Low-level output voltage
Output short-circuit current
I
= −500
= 500
A
OH
LOAD
µ
I
A
0.3
1.5
1
0.5
3.5
V
OL
LOAD
µ
I
V
= 0 V
mA
MHz
SC
OUT
= 100 kHz,
(1)
Gain bandwidth product
CURRENT AMPLIFIER
f
IN
10 mV
P−P
V
V
V
= 0 V,
= 0 V,
= 0 V
T
= 25°C
−4
−5.5
−500
80
0
0
CM
CM
CM
A
Input offset voltage
mV
overtemperature
Input bias current, I
Open loop gain
500
nA
dB
SENSE
2 V ≤ V
≤ 6 V
110
8
OUT
V
V
High-level output voltage
Low-level output voltage
Output short-circuit current
I
= −500
= 500
A
µ
OH
LOAD
V
I
A
µ
0.3
1.5
0.5
3.5
5.0
OL
LOAD
I
V
OUT
= 0 V
mA
V
SC
CMRR Common mode rejection range
(1)
−0.3
3
Gain bandwidth product
REFERENCE
f
IN
= 100 kHz,
10 mV
P−P
5
MHz
I
I
= 0 mA,
= 0 mA
T
= 25°C
7.4
7.35
0
7.5
7.50
8
7.6
7.65
20
REF
A
Output voltage
V
REF
Load regulation
Line regulation
1 mA ≤ I
≤ 10 mA
≤ 18 V
REF
mV
mA
12 V ≤ V
CC
0
14
25
I
Short circuit current
V
= 0 V
25
35
60
SC
REF
(1)
Ensured by design. Not production tested.
ǒV * 1.5 VNj
IIAC
VAO
(2)
Gain constant. (K) +
2
ǒ
Ǔ
ƪV
ƫ
IMOUT
VRMS
4
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