AD9874 Analog Devices, AD9874 Datasheet - Page 11

• Manufacturer Part Number: AD9874
• Description: Low Power IF Digitizing Subsystem
• Manufacturer: Analog Devices

Specifications of AD9874

• Resolution (bits): 24bit
• # Chan: 1
• Sample Rate: 26MSPS
• Interface: Ser
• Analog Input Type: Diff-Uni,SE-Uni
• Adc Architecture: Sigma-Delta
• Pkg Type: QFP

(VDDI = VDDF = VDDA = VDDC = VDDL = VDDD = VDDH = VDDx, VDDQ = VDDP = 5.0 V, f
T
TPC 10a. Noise Figure vs. BW (Mini-
mum Attenuation, f
TPC 12a. IMD vs. IFIN (f
1
2
3
REV. A
Data taken with Toko FSLM series 10 µH inductors.
High Bias corresponds to LNA_Mixer Setting of 33 in SPI Register 0x01.
Low Bias corresponds to LNA_Mixer Setting of 12 in SPI Register 0x01.
A
–100
–110
–120
–130
–30
–40
–50
–60
–70
–80
–90
= 25 C, LO = –5 dBm, LO and CLK Synthesizer Disabled, 16-Bit Data with AGC and DVGA enabled, unless otherwise noted.)
10.0
11.5
11.0
10.5
10.0
9.5
9.0
8.5
8.0
7.5
–45
9.5
9.0
8.5
8.0
7.5
7.0
TPC 11a. Noise Figure vs. VGA
Attenuation (f
10
0
I/Q DATA
I/Q DATA
24-BIT
–42
16-BIT
CHANNEL BANDWIDTH – kHz
BW = 12.04kHz
–39
(K = 0, M = 8)
VGA ATTENUATION – dB
3
–36
IFIN – dBm
BW = 27.08kHz
(K = 0, M = 3)
PIN
CLK
100
–33
LOW BIAS
CLK
6
= 13 MSPS)
HIGH BIAS
= 13 MSPS)
–30
CLK
ENABLED
I/Q DATA
w/ DVGA
16-BIT
BW = 6.78kHz
(K = 0, M = 15)
= 13 MSPS)
–27
9
–24
1000
12
–5
–10
–15
–20
–25
–30
–35
–40
–45
TPC 10b. Noise Figure vs. BW (Mini-
mum Attenuation, f
TPC 12b. IMD vs. IFIN (f
–100
–110
–120
–130
–30
–40
–50
–60
–70
–80
–90
10.0
9.5
9.0
8.5
8.0
7.5
–45
14
13
12
11
10
10
9
8
7
TPC 11b. Noise Figure vs. VGA
Attenuation (f
0
–42
16-BIT
DATA
CHANNEL BANDWIDTH – kHz
–39
VGA ATTENUATION – dB
(K = 0, M = 2)
3
BW = 50kHz
(K = 0, M = 1)
–36
BW = 75kHz
IFIN – dBm
–11–
PIN
CLK
100
–33
CLK
LOW BIAS
6
= 18 MSPS)
16-BIT DATA
24-BIT
ENABLED
= 18 MSPS)
DATA
–30
CLK
w/ DVGA
HIGH BIAS
(K = 0, M = 9)
BW = 15kHz
= 18 MSPS)
–27
9
CLK
= 18 MSPS, f
–24
1000
12
–5
–10
–15
–20
–25
–30
–35
–40
–45
IF
TPC 10c. Noise Figure vs. BW (Mini-
mum Attenuation, f
TPC 12c. IMD vs. IFIN (f
= 109.56 MHz, f
–100
–110
–120
–130
–30
–40
–50
–60
–70
–80
–90
10.0
9.5
9.0
8.5
8.0
7.5
–45
TPC 11c. Noise Figure vs. VGA
Attenuation (f
14
13
12
11
10
9
8
7
10
0
BW = 90.28kHz
(K = 1, M = 2)
–42
CHANNEL BANDWIDTH – kHz
16-BIT
DATA
–39
VGA ATTENUATION – dB
3
L O
BW = 135.42kHz
–36
= 107.4 MHz,
IFIN – dBm
(K = 1, M = 1)
1
PIN
CLK
100
–33
LOW BIAS
CLK
6
16-BIT DATA
= 26 MSPS)
ENABLED
w/ DVGA
AD9874
= 26 MSPS)
–30
CLK
HIGH BIAS
BW = 27.08kHz
(K = 1, M = 9)
= 26 MSPS)
–27
9
24-BIT
DATA
–24
1000
12
–5
–10
–15
–20
–25
–30
–35
–40
–45