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參數(shù)資料
| 型號： | MAX2079CXE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 34/49頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OCT ULTRASOUND RCVR 144CTBGA |
| 標準包裝： | 1,000 |
| 系列： | * |
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Low-Power, High-Performance, Fully Integrated
Octal Ultrasound Receiver (Octal LNA, VGA,
AAF, ADC, and CWD Beamformer)
MAX2079
4
Maxim Integrated
AC eLeCTRICAL CHARACTeRISTICS—VGA MODe (CWD BeAMFORMeR OFF) (continued)
(VREF = 2.5V, VCC3 = 3.13V to 3.47V, VCC5 = 4.5V to 5.25V, VAVDD = VOVDD = 1.7V to 1.9V, TA = 0NC to +70NC, VGND = 0V, SHDN = 0,
CWD = 0, LOON = 0, fRF = 5MHz, 50mVP-P, ADC fCLK = 50Msps, digital HPF set to 60/64, two poles, 15/16 digital gain, VGC+ -
VGC- = -3V (minimum gain), high LNA gain. Typical values are at VREF = 2.5V, VCC3 = 3.3V, VCC5 = 4.75V, VAVDD = VOVDD = 1.8V,
VGC+ - VGC- = 0V, TA = +25NC, unless otherwise noted.) (Note 3)
PARAMeTeR
CONDITIONS
MIN
TYP
MAx
UNITS
8-Channel Correlated Noise
Power
No input signal, ratio of 8-channel noise power to
single-channel noise power
9.0
dB
5MHz signal applied to all 8 channels, VGC+ - VGC- = 0V,
fRF = 5MHz at -3dBFS, ratio of 8-channel noise power to
single-channel noise power
8.5
LNA Gain (Low LNA Gain)
12.5
dB
LNA Gain (High LNA Gain)
18.5
dB
Maximum Gain (High LNA Gain) VGC+ - VGC- = +3V (max gain), LNA input to ADC Input
44.7
dB
Minimum Gain (High LNA Gain) VGC+ - VGC- = -3V (min gain), LNA input to ADC Input
5.9
dB
Maximum Gain (Low LNA Gain) VGC+ - VGC- = +3V (max gain), LNA input to ADC Input
40.4
dB
Minimum Gain (Low LNA Gain)
VGC+ - VGC- = = -3V (min gain), LNA input to ADC input
1.4
dB
Gain Range
38.8
dB
AA Filter 3dB Corner Frequency
9MHz setting
9
MHz
10MHz setting
10
15MHz setting
15
18MHz setting
18
AA Filter 3dB Corner Frequency
Accuracy
Q
10
%
Digital Highpass Filter 3dB
Corner Frequency
2 poles, coefficients R1 = R2 = 63/64, fCLK = 50Msps
0.185
MHz
2 poles, coefficients R1 = R2 = 54/64, fCLK = 50Msps
1.736
Clamp Level
Clamp on (VP-P on AAF Output/ADC Input, digital HPF
bypassed)
92
%FS
Device-to-Device Gain Matching TA = +25NC, VGC+ - VGC- = -3V to +3V (Note 6)
-1.6
Q
0.5
+1.6
dB
Input Gain Compression
LNA = high gain, VGC+ - VGC- = -3V (VGA = min gain),
gain ratio with 330mVP-P/50mVP-P input tones
0.7
dB
LNA = low gain, VGC+ - VGC- = -3V (VGA = min gain),
gain ratio with 600mVP-P/50mVP-P input tones
0.9
VGA Gain Response Time
Gain step up (VIN = 5mVP-P, VGC+ - VGC- changed from
-3V to +3V, settling time is measured within 1dB final value)
0.8
F
s
Gain step down (VIN = 5mVP-P, VGC+ - VGC- changed from
-3V to +3V, settling time is measured within 1dB final value)
1.8
VGA Output Offset Under
Pulsed Overload
Over drive is Q10mA in clamping diodes, VGC+ - VGC- =
1.0V (gain = 30dB), 16 pulses at 5MHz, repetition rate
20kHz; offset is measured at output when RF duty cycle is off
< 3.3
%FS
Signal-to-Noise Over ADC
Nyquist Band (25MHz)
VOUT_ = -1dBFS, VIN = 200mVP-P, fRF = 5MHz at -1dBFS,
anti-alias filter = 9MHz, 50Msps sample rate
67
dBFS
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