Page 1
CORPORATION
350MHz High Speed Buffer
CLM4125
FEATURES
High Slew Rat e. . . . . . . . . . . . . . . . . . . . . . . . . . 3500V/µs
••
Wide Ban dw idt h. . . . . . . . . . . . . . . . . . . . . . . . . . 350MHz
••
Peak Output Current. . . . . . . . . . . . . . . . . . . . . . . 100m A
••
No Oscillations w it h Capacitive Lo ads
••
Fully S p e ci fi e d to Drive 50Ω Lines
••
APPLICATIONS
Pulse and Video Am pl ifi er
••
Coaxial Ca ble Driv er
••
Video Switching and Routing
••
CONNECTION DIAGRAMS
Plastic DIP
1
*V-
2
V
IN
3
N/C
45
*V-
8
V-*
7
V
OUT
6
V+
V-*
GENERAL DESCRIPTION
The CLM4125 is a high speed unity gain buffers that slew at
3500V/µs, and a sm a ll signal bandwidth of 350MHz.
This device is ideal to drive a active load C RT amplif ier.
ORDERING INFORMATION
Part Package Temperature Range
o
V
V+
C to 85oC
o
C to 85oC
CLM4125 N NO8A (Plas tic P Dip 8 Lead) -40
CLM41 25 M MO8B (SO I C 8 Le a d) -40
Plastic SO
1
*V- V-*
2
V
IN OUT
3
N/C
45
*V- V-*
8
7
6
*Heat-sinking pins. Pin 1 and Pin 8
must be connected to the negative supply.
Package NO8A Package MO8B
*Heat-sinking pins. Pin 1 and Pin 8
must be connected to the negative supply.
CALOGIC CORPORA TION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
Page 2
CLM4125
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±Vsupply
Storage Temperatur e Ra nge. . . . . . . . . . . . -65
Lead Temperatur e
(Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . 260
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . (Note 4)
o
C to +150oC
o
CORPORATION
ESD Tolerance (Note 3). . . . . . . . . . . . . . . . . . . . . . . ±2000V
Therma l Re sistance (θ
N Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
M Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
C
Maximum J unction Temperature . . . . . . . . . . . . . . . . . . 150
) (Note 6)
JA
o
C/W
o
C/W
o
C
DC ELECTRICAL CHARACTERISTICS
The following specifications apply for Supply V o ltag e = +12, -10V, V
Boldface limits apply for T
= TJ = T
A
SYMBOL CHARACTERISTICS TYP Limit (Note 5) UNITS CONDITIONS
A
V1
A
V2
A
V3
V
OS
I
B
R
IN
C
IN
R
O
I
S1
V
O1
V
O2
Voltage Gain 1 0.99 0.96
Voltage Gain 2 0.92 0.89 RL = 100Ω, VIN = ±10V
Voltage Gain 3 0.92 0.89 RL = 50Ω, VIN = ±5V
Offset Voltage 10
Input Bias Current 1
Input Resistance 0.3 MΩ RL = 50Ω
Input Capacitance 3.5 pF
Output Resistance 3
Supply Current 1 20
Output Swing 1 11 9
Output Swing 2 9 8 RL = 100Ω
MIN
to T
; all other limits TA = TJ = 25oC.
MAX
= 0, RL ≥ 100KΩ and RS = 50Ω unless otherwise noted.
CM
RL = 1K, VIN = ±10V
V/V Min
15
25
5
7
5
10
30
30
mV Max R
µA Max R
Ω Max I
mA Max R
= 1K
L
= 1KΩ, RS = 10kΩ,
L
= ±10mA
OUT
= ∞
L
RL = 1K
±V Min
V
O3
Output Swing 3 9 8 VPP Min RL = 50Ω
CALOGIC CORPORA TION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
Page 3
CORPORATION
AC ELECTRICAL CHARACTERISTICS
The following specifications apply for Supply V o ltag e = +12, -10V, V
Boldface limits apply for T
= TJ = T
A
SYMBOL CHARACTERISTICS TYP Limit (Note 5) UNITS CONDITIONS
MIN
to T
; all other limits TA = TJ = 25oC.
MAX
= 0, RL ≥ 100KΩ and RS = 50Ω unless otherwise noted.
CM
CLM4125
SR
SR
SS
LS
P
t
r
t
pd
O
BW
, t
S
1
2
BW
BW
Slew Rate 1 3500 3000
V/µs
Slew Rate 2 2250 2000 VIN = ±4V, RL = 50Ω (Note 2)
Small Signal Bandwidth 350 300
MHz
Large Signal Bandwidth 140 120
Power Bandwidth 130 110 VIN = ±4V, CL ≤ 100p F
f
Rise Time
Fall Time
2.5 3.5 ns
Propagation Delay Time 2.0 ns
Overshoot 3 %
VIN = ±4.5V, RL = 100Ω (Note 2)
= ±100mVPP, RL = 50Ω
V
IN
C
≤ 10pF
L
V
= ±4.5V, RL = 100Ω
OUT
C
≤ 10pF
L
C
≤ 100pF
L
V
= 4V
O
PP
R
= 50Ω, CL ≤ 10pF
L
V
= 4V
O
PP
R
= 50Ω, CL ≤ 10pF
L
V
= 10 0mV
O
PP
Note 1: Absolute Maximu m Rating s indicate limits beyond which dama ge to the device may occur. DC and AC electrical specification s do no t
apply when operating the device beyond its rated operati ng conditi on s.
o
Note 2: Slew rate is measured with 50Ω source imped an ce at 25
C. For accurate measurements, the input slew rate should be at least
5000V/µs.
Note 3: The test circuit consists of the human body model of 120pF in series with 1500Ω.
Note 4: The maximum power dissipation is a function of T
temperature is P
D
= (T
J(max)
- TA)/θJA.
J(max), θJA
and TA. The maximum allowable power dissipation at any ambient
Note 5: Limits are guaranteed by testing, correlation or periodic characterization.
Note 6: For M & N package, θ
is measured by soldering the unit directly on a printed circuit board and V- pins are connected to 2 square
JA
inches of 2 oz copper.
CALOGIC CORPORA TION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
Page 4
CLM4125
TYPICAL PERFORMANCE CHARACTERI STI CS
CORPORATION
FREQUENCY RESPONSE
20
15
10
5
0
-5
= 100Ω
R
L
-10
GAIN (dB)
V
≤ 100mV
IN
-15
C
≤ 100pF
L
-20
Tj= 25˚C
-25
-30
0.5 51 2 10 20 20050 100 1000500
FREQUENCY (MHz)
BANDWIDTH
(LARGE SIGNAL & POWER)
10
(V )
V
P-P
OUT
9
8
7
6
5
4
3
2
1
0
11025
RL= 100Ω
R
L
20 50 400100 200
FREQUENCY (MHz)
= 50Ω
PHASE LAG (DEGREES)
84
72
60
48
36
24
12
0
GAIN (dB)
-3dB BANDWIDTH (MHz)
FREQUENCY RESPONSE
5
0
-5
-10
-15
-20
RL= 50Ω
-25
V
≤ 100mV
IN
-30
C
≤ 10pF
L
-35
T
= 25˚C
j
-40
-45
0.5 512
10 20 20050 100
FREQUENCY (MHz)
SUPPLY VOLTAGE
400
380
360
340
320
300
280
260
240
220
200
180
160
140
vs BANDWIDTH
R
= 100Ω
L
1
3579
SUPPLY VOLTAGE (±V)
RL= 50Ω
90
PHASE LAG (DEGREES)
80
70
60
50
40
30
20
10
0
1000500
SUPPLY VOLTAGE
vs SUPPLY CURRENT
50
45
40
35
30
25
20
15
10
SUPPLY CURRENT (±mA)
5
0
1
3579
SUPPLY VOLTAGE (±V)
Inform at ion furni shed by Calogic is believed to be accurate and reliable. Howe ver, no responsibility is assum ed for its use: nor for any in fring eme nt of pate nts or other
rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Calogic.
4000
3500
3000
s)
µ
2500
2000
1500
SLEW RATE (V/
1000
500
OUTPUPT VOLTAGE
vs SLEW RATE
0
1
357
V
R
OUT
L
= 100Ω
RL= 50Ω
(V )
P-P
CALOGIC CORPORA TION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
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