Datasheet

"#$%&
SBOS316D − JULY 2005 − REVISED OCTOBER 2008
www.ti.com
4
ELECTRICAL CHARACTERISTICS (continued)
All specifications at T
A
= +25°C, V
DD
= 5V, load resistance = 500Ω on each output to ground; the input to the preamp (LNP) is single-ended;
f
IN
= 5MHz, LNP Gain (G1, G2) = 10, H
/L = 0, V
CNTL
= 2.5V; VCA output is 1V
PP
differential; CA, CB = 3.9µF, unless otherwise noted.
PARAMETER
UNIT
VCA2615
CONDITIONS
PARAMETER
UNIT
MAXTYPMIN
CONDITIONS
ACCURACY
Gain Slope V
CNTL
= 0.4V to 2.0V 22 dB/V
Gain Error
(4)
V
CNTL
= 0.4V to 2.0V −1.5 ±0.9 +1.5 dB
Gain Range V
CNTL
= 0.2V to 2.5V 52 dB
Gain Range V
CNTL
= 0.4V to 2.0V 36.5 dB
Gain Range (H/L) H/L = 0 (+6dB); VGA High Gain; V
CNTL
= 0.2V to 2.5V −12 to +40 dB
H/L = 1 (0dB); VGA Low Gain; V
CNTL
= 0.2V to 2.5V −18 to +34 dB
Output Offset Voltage, Differential ±50 mV
Channel-to-Channel Gain Matching V
CNTL
= 0.4V to 2.0V, CHA to CHB ±0.33 dB
GAIN CONTROL INTERFACE (V
CNTL
)
Input Voltage Range 0.2 to 2.5 V
Input Resistance
Response Time
1 MΩ
Input Resistance
Response Time
V
CNTL
= 0.2V to 2V; to 90% Signal Level 0.6 µs
DIGITAL INPUTS
(5), (6)
(G1, G2, PDL, PDV, H/L, FB1-FB4, VCA
IN
SEL)
V
IH
, High-Level Input Voltage 2.0 V
V
IL
, Low-Level Input Voltage 0.8 V
Input Resistance 1 MΩ
Input Capacitance 5 pF
POWER SUPPLY
Supply Voltage 4.75 5.0 5.25 V
Power-Up Response Time 25 µs
Power-Down Response Time 2 µs
Total Power Dissipation PDV, PDL = 1 308 350 mW
VGA Power-Down PDV = 0, PDL = 1 236 mW
LNP Power-Down PDL = 0, PDV = 1 95 mW
THERMAL CHARACTERISTICS
Temperature Range Ambient, Operating −40 +85 °C
Thermal Resistance, q
JA
QFN−48 Soldered Pad; Four-Layer PCB with Thermal Vias 29.1 °C/W
q
JC
2.2 °C/W
q
JA
TQFP−48 58 °C/W
(1)
R
IN
+
R
F
(1 )
A
LNP
2
)
(2)
2nd−harmonic, 3rd-harmonic distortion less than or equal to −30dBc.
(3)
See Table 5.
(4)
Referred to best-fit dB linear curve.
(5)
Parameters ensured by design; not production tested.
(6)
Do not leave inputs floating; no internal pull-up/pull-down resistors.