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PDF AD8283 Data sheet ( Hoja de datos )
| Número de pieza | AD8283 | |
| Descripción | 6-Channel LNA/PGA/AAF | |
| Fabricantes | Analog Devices | |
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Data Sheet
Radar Receive Path AFE:
6-Channel LNA/PGA/AAF with ADC
AD8283
FEATURES
6 channels of LNA, PGA, AAF
1 channel of direct-to-ADC
Programmable gain amplifier (PGA)
Includes low noise preamplifier (LNA)
SPI-programmable gain = 16 dB to 34 dB in 6 dB steps
Antialiasing filter (AAF)
Programmable third-order low-pass elliptic filter (LPF) from
1 MHz to 12 MHz
Analog-to-digital converter (ADC)
12 bits of accuracy up to 72 MSPS
SNR = 67 dB
SFDR = 68 dB
Low power, 170 mW per channel at 12 bits/72 MSPS
Low noise, 3.5 nV/√Hz maximum of input referred
voltage noise
Power-down mode
72-lead, 10 mm × 10 mm, LFCSP package
Specified from −40°C to +105°C
Qualified for automotive applications
APPLICATIONS
Automotive radar
Adaptive cruise control
Collision avoidance
Blind spot detection
Self-parking
Electronic bumper
GENERAL DESCRIPTION
The AD8283 is designed for low cost, low power, compact size,
flexibility, and ease of use. It contains six channels of a low noise
preamplifier (LNA) with a programmable gain amplifier (PGA)
and an antialiasing filter (AAF) plus one direct-to-ADC
channel, all integrated with a single 12-bit analog-to-digital
converter (ADC).
Each channel features a gain range of 16 dB to 34 dB in 6 dB
increments and an ADC with a conversion rate of up to 72 MSPS.
The combined input-referred noise voltage of the entire channel
is 3.5 nV/√Hz at maximum gain. The channel is optimized for
dynamic performance and low power in applications where a
small package size is critical.
FUNCTIONAL BLOCK DIAGRAM
INA+
INA–
INB+
INB–
INC+
INC–
IND+
IND–
INE+
INE–
INF+
INF–
INADC+
INADC–
LNA PGA AAF
LNA PGA AAF
LNA PGA AAF
LNA PGA AAF
LNA PGA AAF
LNA PGA AAF
SPI
REFERENCE
MUX
12-BIT
ADC
DRV
AD8283
DSYNC
D[0:11]
Figure 1.
Fabricated in an advanced CMOS process, the AD8283 is
available in a 10 mm × 10 mm, RoHS-compliant, 72-lead
LFCSP. It is specified over the automotive temperature range
of −40°C to +105°C.
Table 1. Related Devices
Part No. Description
AD8285 4-Channel LNA/PGA/AAF, pseudosimultaneous
channel sampling with ADC
AD8284 4-Channel LNA/PGA/AAF, sequential channel
sampling with ADC
ADA8282 4-Channel LNA/PGA
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2011–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD8283
Data Sheet
Parameter 1
ADC
Resolution
Max Sample Rate
Signal-to-Noise Ratio (SNR)
Signal-to-Noise and Distortion
(SINAD)
SNRFS
Differential Nonlinearity (DNL)
Integral Nonlinearity (INL)
Effective Number of Bits (ENOB)
ADC Output Characteristics
Maximum Cap Load
IDVDD33 Peak Current with Cap Load
ADC REFERENCE
Output VoltageError
Load Regulation
Input Resistance
FULL CHANNEL CHARACTERISTICS
Conditions
fIN = 1 MHz
Guaranteed no missing codes
Per bit
Peak current per bit when driving a
20 pF load; can be programmed via
the SPI port if required
VREF = 1.024 V
At 1.0 mA, VREF = 1.024 V
LNA, PGA, AAF, and ADC
Min
AD8283W
Typ
12
72
68.5
66
68
10.67
20
Max
1
10
40
Unit
Bits
MSPS
dB
dB
dB
LSB
LSB
LSB
pF
mA
±25 mV
2 mV
6 kΩ
SNRFS
FIN = 1 MHz
Gain = 16 dB
Gain = 22 dB
Gain = 28 dB
Gain = 34 dB
68 dB
68 dB
68 dB
66 dB
SINAD
FIN = 1 MHz
Gain = 16 dB
Gain = 22 dB
Gain = 28 dB
Gain = 34 dB
67 dB
68 dB
67 dB
66 dB
SFDR
FIN = 1 MHz
Gain = 16 dB
Gain = 22 dB
Gain = 28 dB
Gain = 34 dB
68 dB
74 dB
74 dB
73 dB
Harmonic Distortion
Second Harmonic
Third Harmonic
IM3 Distortion
Gain Response Time
Overdrive Recovery Time
FIN =1 MHz at −10 dBFS, gain = 16 dB
FIN =1 MHz at −10 dBFS, gain = 34 dB
FIN =1 MHz at −10 dBFS, gain = 16 dB
FIN =1 MHz at −10 dBFS, gain = 34 dB
FIN1 = 1 MHz, FIN2 = 1.1 MHz, −1 dBFS,
gain = 34 dB
−70
−70
−66
−75
−69
600
200
dBc
dBc
dBc
dBc
dBc
ns
ns
1 See the AN-835 Application Note, UnderstandingHighSpeed ADC Testing and Evaluation, for a complete set of definitions and how these tests were completed.
Rev. C | Page 4 of 27
5 Page 
AD8283
TYPICAL PERFORMANCE CHARACTERISTICS
VS = 3.3 V, 1.8 V, TA = 25°C, FS = 72 MSPS, RIN =200 kΩ, VREF = 1.0 V.
50
40
34dB
30 28dB
22dB
20 16dB
10
0
–10
–20
–30
–40
0.1
1 10
FREQUENCY (MHz)
Figure 4. Channel Gain vs. Frequency
100
1.0
34dB
0.8
28dB
22dB
16dB
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–40 –15
10
35
60
TEMPERATURE (°C)
Figure 5. Gain Error vs. Temperature at All Gains
85
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
16.00
16.16
16.32
16.48
16.64
16.8
16.96
16.08
16.24
16.4
16.56
16.72
16.88
(dB)
Figure 6. Gain Error Histogram (Gain = 16 dB)
Data Sheet
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
33.50
33.66
33.82
33.98
34.14
34.30
34.46
33.58
33.74
33.90
34.06
34.22
34.38
(LSB)
Figure 7. Gain Error Histogram (Gain = 34 dB)
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.22 0.24
0.01 0.03 0.05 0.07 0.09 0.11 0.13 0.15 0.17 0.19 0.21 0.23 0.25
(dB)
Figure 8. Channel-to-Channel Gain Matching (Gain = 16 dB)
10
9
8
7
6
5
4
3
2
1
0
0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.22 0.24
0.01 0.03 0.05 0.07 0.09 0.11 0.13 0.15 0.17 0.19 0.21 0.23 0.25
(dB)
Figure 9. Channel-to-Channel Gain Matching (Gain = 34 dB)
Rev. C | Page 10 of 27
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet AD8283.PDF ] | |
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