參數(shù)資料
型號： VCA2615RGZR
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬信號調理
英文描述： SPECIALTY ANALOG CIRCUIT, PQCC48
封裝： 7 X 7 MM, GREEN, PLASTIC, QFN-48
文件頁數(shù)： 23/33頁
文件大?。?/td> 1122K
代理商： VCA2615RGZR
VCA2615
SBOS316D JULY 2005 REVISED OCTOBER 2008
www.ti.com
3
ELECTRICAL CHARACTERISTICS
All specifications at TA = +25°C, VDD = 5V, load resistance = 500 on each output to ground; the input to the preamp (LNP) is single-ended;
fIN = 5MHz, LNP Gain (G1, G2) = 10, H/L = 0, VCNTL = 2.5V; VCA output is 1VPP differential; CA, CB = 3.9F, unless otherwise noted.
VCA2615
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
PREAMPLIFIER (LNP and Buffer)
Input Resistance, RIN
With Active Feedback Termination
See Note(1)
k
Input Resistance
Feedback Termination Open
100
k
Input Capacitance
45
pF
Maximum Input Voltage
LNP Gain (G1, G2) = 00 Linear Operation(2)
2.3
VPP
LNP Gain (G1, G2) = 01 Linear Operation(2)
0.78
VPP
LNP Gain (G1, G2) = 10 Linear Operation(2)
0.39
VPP
LNP Gain (G1, G2) = 11 Linear Operation(2)
0.23
VPP
Maximum Input Voltage
Any LNP Gain Overload (symmetrical clipping)
5
VPP
Input Voltage Noise
RS = 0; Includes Buffer Noise, LNP Gain = 11
0.8
nV/
√Hz
Input Current Noise
1
pA/
√Hz
Bandwidth
50
MHz
2nd-Harmonic Distortion
fIN = 5MHz
55
dBc
3rd-Harmonic Distortion
fIN = 5MHz
55
dBc
LNP Gain Change Response Time
LNP Gain 00 to 11; to 90% Signal Level
0.1
s
BUFFER (LNPOUT+A/B, LNPOUTA/B)
Output Signal Range(2)
RL > = 500
3.3
VPP
Output Common-Mode Voltage
1.85
V
Output Short-Circuit Current
60
mA
Output Impedance
3
ACTIVE TERMINATION
Feedback Resistance(3), RF
FB (1-4) = 0111
1500
FB (1-4) = 1011
1000
FB (1-4) = 1101
500
FB (1-4) = 1110
250
FB (1-4) = 0000
130
VARIABLE-GAIN AMPLIFIER (VGA)
Peak Input Voltage
Linear Operation(2), VCNTL = 0.7V
2
VPP
Upper 3dB Bandwidth
50
MHz
2nd-Harmonic Distortion
VCNTL = 2.5V, 1VPP Differential Output
60
dBc
3rd-Harmonic Distortion
VCNTL = 2.5V, 1VPP Differential Output
63
dBc
Slew-Rate
±100
V/
s
PREAMPLIFIER AND VARIABLE-GAIN
AMPLIFIER (LNP AND VGA)
Input Voltage Noise
0.7
nV/
√Hz
Clipping Voltage Range (VCLMP)
0.25 to 2.6
V
Clipping Voltage Variation
VCLMP = 0.5V, VCAOUT = 1.0VPP
±50
mV
Output Impedance
fIN = 5MHz, Single-Ended, Either Output
3
Output Short-Circuit Current
60
mA
Overload Distortion (2nd-Harmonic)
VIN = 250mVPP
44
dBc
Crosstalk
fIN = 5MHz
70
dBc
Delay Matching
±1
ns
Overload Recovery Time
25
ns
Maximum Output Load
100
Maximum Capacitive Output Loading
50
in Series
80
pF
Maximum Output Signal(2)
6
VPP
Output Common-Mode Voltage
2.5
V
2nd-Harmonic Distortion
Input Signal = 5MHz, VCNTL = 1V
45
55
dB
3rd-Harmonic Distortion
Input Signal = 5MHz, VCNTL = 1V
45
55
dB
Upper 3dB Bandwidth
VCNTL = 2.5V
42
MHz
(1)
R
IN +
R
F
(1
)
A
LNP
2
)
(2) 2ndharmonic, 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.
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