AD9870 View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD9870 Datasheet PDF : 20 Pages
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AD9870
PIN CONFIGURATION
48 47 46 45 44 43 42 41 40 39 38 37
MXOP 1
MXON 2
GNDF 3
IF2N 4
IF2P 5
VDDF 6
GCP 7
GCN 8
VDDA 9
GNDA 10
VREFP 11
VREFN 12
PIN 1
IDENTIFIER
AD9870
TOP VIEW
(Not to Scale)
36 GNDL
35 FREF
34 GNDS
33 SYNCB
32 GNDH
31 FS
30 DOUTB
29 DOUTA
28 CLKOUT
27 VDDH
26 VDDD
25 PE
13 14 15 16 17 18 19 20 21 22 23 24
PIN FUNCTION DESCRIPTIONS
Pin Mnemonic Description
Pin Mnemonic
1 MXOP
2 MXON
3 GNDF
4 IF2N
5 IF2P
6 VDDF
7 GCP
8 GCN
9 VDDA
10 GNDA
11 VREFP
12 VREFN
13 VCM
14 VDDQ
15 IOUTC
16 GNDQ
17 VDDC
18 GNDC
19 CLKP
20 CLKN
21 GNDS
22 GNDD
23 PC
24 PD
Mixer Output, Positive
25
Mixer Output, Negative
26
Ground for VGA
27
Second IF Input (to VGA), Negative
28
Second IF Input (to VGA), Positive
29
Positive Power Supply for Antialias Filter/VGA
30
Filter Capacitor for VGA Gain Control, Positive 31
Filter Capacitor for VGA Gain Control, Negative 32
Positive Power Supply for ADC
33
Ground for ADC
34
Voltage Reference, Positive
35
Voltage Reference, Negative
36
Common-Mode Voltage (Requires 20 kΩ to GNDA) 37
Pos. Power Supply for Clock Synth. Charge Pump 38
Clock Synthesizer Charge Pump Output Current 39
Ground for Clock Synthesizer Charge Pump
40
Positive Power Supply for Clock Synthesizer
41
Ground for Clock Synthesizer
42
Sampling Clock Input/Clock VCO Tank, Positive 43
Sampling Clock Input/Clock VCO Tank, Negative 44
Substrate Ground
45
Ground for Digital Functions
46
Clock Input for SPI Port
47
Data I/O for SPI Port
48
PE
VDDD
VDDH
CLKOUT
DOUTA
DOUTB
FS
GNDH
SYNCB
GNDS
FREF
GNDL
GNDP
IOUTL
VDDP
VDDL
CXVM
LON
LOP
CXVL
GNDI
CXIF
IFIN
VDDI
Description
Enable Input for SPI Port
Positive Power Supply for Internal Digital Functions
Positive Power Supply for Digital Interface
Clock Output for SSI Port
Data Output for SSI Port
Data Output for SSI Port, Unused
Frame Sync for SSI Port
Ground for Digital Interface
Resets the SSI and Decimator Counters
Substrate Ground
Reference Frequency Input for Both Synthesizers
Ground for LO Synthesizer
Ground for LO Synthesizer Charge Pump
LO Synthesizer Charge Pump Output Current
Positive Power Supply for LO Synth. Charge Pump
Positive Power Supply for LO Synthesizer
External Capacitor for Mixer Bias
LO Input to Mixer and LO Synthesizer, Negative
LO Input to Mixer and LO Synthesizer, Positive
External Capacitor for Preamp Power Supply
Ground for Mixer and Preamp
External Capacitor for Preamp Bias
First IF Input (to Preamp)
Positive Power Supply for Mixer and Preamp
–4–
REV. 0
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