lt5554 Linear Technology Corporation, lt5554 Datasheet - Page 6

• Manufacturer Part Number: lt5554
• Description: Broadband Ultra Low Distortion 7-bit Digitally Controlled Vga
• Manufacturer: Linear Technology Corporation

LT5554
DC ELECTRICAL CHARACTERISTICS
MODE = 5V, unless otherwise noted. (Note 3) (Test circuit shown in Figure 16), unless otherwise noted.
SYMBOL
DEC External Capacitor Charge/Discharge CURRENT
I
I
Mode Input Three-State DC Characteristics
V
V
V
I
I
PGx (MODE = V
V
V
I
I
PGx (MODE = 0V or MODE = OPEN) and STROBE (MODE = 0V) INPUTS for AC-Coupled
V
V
V
I
I
Amplifi er DC Characteristics
V
V
R
G
I
I
I
I
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All voltage values are with respect to GND ground.
Note 3: R
input power. P
output resistance at amplifi er open-collectors outputs (used in G
calculation). R
6
IH(DEC)
IL(DEC)
IL(MODE)
IH(MODE)
IL(DC)
IH(DC)
IL(AC)
IH(AC)
ODC
OUT(OFFSET)
CC
CC(TOTAL)
IL(MODE)
OPEN(MODE)
IH(MODE)
IL
IH
IN(AC)
IN(AC)P-P
IN(AC)MAX
IN(DEC)
IN(BIAS)
IN
M
S
= R
OUT
O
IN
PARAMETER
DEC Pin Source Current
DEC Pin Sink Current
MODE Input LOW Voltage for AC-Couple
MODE Input OPEN
MODE Input HIGH Voltage
MODE Input Current
MODE Input Current
Input LOW Voltage
Input HIGH Voltage
Input Current
Input Current
Input Pulse Range
Input Pulse Amplitude
Maximum Input Noise Amplitude
Input Current
Input Current
DEC
IN
INPUT Differential Resistance
Amplifi er Transconductance
OUT
Output Current Mismatch
V
Total Supply Current
CC
= 400Ω is LT5554 internal output impedance. R
CC
= 50Ω Input matching is assumed. P
+
) and STROBE (MODE = OPEN or MODE = V
is the power into R
, IN
Supply Current
+
, OUT
–
Bias Voltage
–
Quiescent Current
OUT
. R
OUT
= R
O
|| R
IN
LOAD
is the available
CONDITIONS
V
V
PGx AC-Coupled, STROBE AC-Coupled
PGx AC-Coupled, STROBE DC-Coupled
PGx DC-Coupled, STROBE DC-Coupled
V
V
V
V
Instantaneous Input Voltage
Rise and Fall Time <5ns
Rise and Fall Time >80ns
No LT5554 Gain Update
V
V
G
G
G
G
G
V
IN
G
G
G
G
I
CC
is the total
DEC
DEC
MODE
MODE
IN
IN
IN
IN
OUT
MAX
MAX
MAX
MIN
MAX
MAX
MIN
MAX
MIN
CC
+
, IN
LOAD
+ 2 • I
= 0.6V
= 5V
= 0V
= 5V
V,
) INPUTS for DC-Coupled
, MODE = 0V
, MODE = 5V
= 4V
= 1.8V
, MODE = 0V
, MODE = 5V
= 5V
G
–
= 0V
= 5V
P
Open
is
gain
ODC
(G
Specifi cations are at T
MAX
load resistance as seen at OUT
All dBm fi gures are with respect to 50Ω. Specifi cations refer to differential
inputs and differential outputs.
Note 4: An external power supply equal to V
inductors or center-tap transformer output interfaces. Whenever OUT
OUT
output current (I
power supply. However, care must be taken not to exceed the OUT
OUT
)
–
–
pins are biased via resistors, the voltage drop produced by the DC-
absolute maximum rating when the LT5554 is disabled.
ODC
A
= 45mA typical) may require a larger output external
= 25°C. V
V
CC
–210
1.85
MIN
–70
–42
125
310
2.2
1.8
1.7
27
43
33
78
77
75
75
0
0
– 0.4
+
, OUT
CC
= 5V, V
–
pins.
OPEN
–155
2.04
0.15
TYP
–38
V
–31
170
600
300
100
420
200
110
109
106
106
200
50
72
48
50
47
2
CC
CCO
CCO
is used for choke
= 5V, ENB = 3V,
–100
MAX
2.25
–14
–23
100
220
530
132
131
127
127
0.6
2.3
0.6
4.6
2.2
70
30
57
+
,
mV
mV
mV
+
UNIT
,
5554f
mA
mA
mA
mA
mA
mA
mA
mA
P-P
P-P
P-P
μA
μA
μA
μA
μA
μA
μA
Ω
Ω
V
V
V
V
V
V
V
V
S