參數(shù)資料
型號: MAX2078CTK+
廠商: Maxim Integrated Products
文件頁數(shù): 22/26頁
文件大?。?/td> 0K
描述: IC FRNT-END ULTRASOUND 8CH 68QFN
應(yīng)用說明: Ultrasound Imaging Systems Application Note
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
特色產(chǎn)品: MAX2078 Octal-Channel Ultrasound Front-End with CW Doppler Mixers
標準包裝: 30
類型: 超聲波接收器
應(yīng)用: 醫(yī)療用超聲波成像,聲納
安裝類型: 表面貼裝
封裝/外殼: 68-TQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 68-TQFN-EP(10x10)
包裝: 管件
MAX2078
Octal-Channel Ultrasound Front-End
with CW Doppler Mixers
_______________________________________________________________________________________
5
AC ELECTRICAL CHARACTERISTICS—VGA MODE (continued)
(
Typical Application Circuit, VREF = 2.475V to 2.525V, VCC1 = 3.13V to 3.47V, VCC2 = 4.5V to 5.25V, TA = 0°C to +70°C, VGND = 0V,
V/C = 1, NP = 0, PD = 0, D43/D42/D41/D40 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D45/D44 = 1/1 (fC = 18MHz), fRF = 5MHz,
capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, RL = 1kΩ
differential, reference noise less than 10nV/
√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF. Typical values are at VCC1
= 3.3V, VCC2 = 4.75V, TA = +25°C, unless otherwise noted.) (Note 5)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Measured at TA = +25
oC, VVG+ - VVG- = -2V
±0.4
Measured at TA = +25
oC, VVG+ - VVG- = 0V
±0.4
Absolute Gain Error
Measured at TA = +25
oC, VVG+ - VVG- = +2V
±0.4
dB
VVG+ - VVG- = -3V (VGA minimum gain), gain ratio with
330mVP-P/50mVP-P input tones
1.4
Input Gain Compression
LNA low gain = 12.5dB, VVG+ - VVG- = -3V (VGA
minimum gain), gain ratio with 600mVP-P/50mVP-P
0.8
dB
Gain step up (VIN = 5mVP-P, gain changed from 10dB to
44dB, settling time is measured within 1dB final value)
1.4
VGA Gain Response Time
Gain step down (VIN = 5mVP-P, gain changed from 44dB
to 10dB, settling time is measured within 1dB final value)
1.6
s
VGA Output Offset Under Pulsed
Overload
Overdrive is ±10mA in clamping diodes, gain at 30dB,
16 pulses at 5MHz, repetition rate 20kHz; offset is
measured at output when RF duty cycle is off
180
mV
Small-Signal Output Noise
20dB of gain, VVG+ - VVG- = -0.85V, no input signal
23
nV/
√Hz
Large-Signal Output Noise
20dB of gain, VVG+ - VVG- = -0.85V, fRF = 5MHz,
fNOISE = fRF + 1kHz, VOUT = 1VP-P differential
35
nV/
√Hz
VIN = 50mVP-P, fRF = 2MHz, VOUT = 1VP-P
-67
Second Harmonic (HD2)
VIN = 50mVP-P, fRF = 5MHz, VOUT = 1VP-P
-64.2
dBc
High-Gain IM3 Distortion
VIN = 50mVP-P, fRF1 = 5MHz, fRF2 = 5.01MHz,
VOUT = 1VP-P (Note 11)
-52
-61
dBc
Low-Gain IM3 Distortion
D43/D42/D41/D40 = 0/0/0/1 (RIN = 200
Ω, LNA gain =
12.5dB),VIN = 100mVP-P, fRF1 = 5MHz, fRF2 = 5.01MHz,
VOUT = 1VP-P (Note 11)
-50
-60
dBc
Standby Mode Power-Up
Response Time
Gain set for 26dB, fRF = 5MHz, VOUT = 1VP-P, settled
with in 1dB from transition on NP pin
2.1
s
Standby Mode Power-Down
Response Time
To reach DC current target ±10%
2.0
s
Power-Up Response Time
Gain set for 28dB, fRF = 5MHz, VOUT = 1VP-P, settled
within 1dB from transition on PD
2.7
ms
Power-Down Response Time
Gain set for 28dB, fRF = 5MHz, DC power reaches
6mW/channel, from transition on PD
5ns
Adjacent Channel Crosstalk
VOUT = 1VP-P differential, fRF = 10MHz, 28dB of gain
-58
dBc
Nonadjacent Channel Crosstalk
VOUT = 1VP-P differential, fRF = 10MHz, 28dB of gain
-71
dBc
Phase Matching Between
Channels
Gain = 28dB, VVG+ - VVG- = 0.4V, VOUT = 1VP-P,
fRF = 10MHz
±1.2
Degrees
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