MAX2116(2005) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX2116 Datasheet PDF : 15 Pages
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Complete DBS Direct-Conversion Tuner ICs
with Monolithic VCOs
Table 2. MAX2116/MAX2118 Read Address Byte
AS2
AS1
AS0
MSB
Low
Low
Low
1
1
Low
Low
High
1
1
Low
High
Low
1
1
Low
High
High
1
1
High
Low
Low
1
1
High
Low
High
1
1
High
High
Low
1
1
High
High
High
1
1
ADDRESS BYTE
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
1
0
0
0
1
0
0
0
1
1
0
0
1
1
LSB
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
Table 3. MAX2116/MAX2118 Control Register Bytes
WRITE TO MODE
RESET
VALUE
ADDR-H
MSB
CONTROL BYTE
Address
—
N High
03
N Low
B6
R and CP and
VCO
3D
I/Q Filter DAC
7F
LPF Divider DAC
02
GC2 and Diag
1F
C0
1
1
0
0
0
C2
1
1
0
0
0
C4
1
1
0
0
0
C6
1
1
0
0
0
C8
1
1
0
0
1
CA
1
1
0
0
1
CC
1
1
0
0
1
CE
1
1
0
0
1
00
DIV2
N14
N13
N12
N11
01
N7
N6
N5
N4
N3
02
R2
R1
R0
CP1
CP0
03
X0
F6
F5
F4
F3
04
ADL
ADE
DL
M4
M3
05
D2
D1
D0
G4
G3
0
0
1
1
0
0
1
1
N10
N2
OSC2
F2
M2
G2
0
1
0
1
0
1
0
1
N9
N1
OSC1
F1
M1
G1
LSB
0
0
0
0
0
0
0
0
N8
N0
OSC0
F0
M0
G0
Byte 02 (Default = 3D)
Bits R2, R1, and R0 are the reference divider bits.
The overall reference divide ratio R = 2 x 2 (4 x R2 + 2 x R1 + R0),
with the default value of R = 4 (R2 = 0, R1 = 0, R0 = 1).
Bits CP1, CP0 control the charge pump current, with
the default value of ±400µA (Table 4).
Bits OSC2, OSC1, and OSC0 control which of the eight
on-chip VCOs is activated. Default is VCO 5 (101)
(Table 5).
Byte 03 (Default = 7F)
Bit X(0) is unused; default = 0.
Bits F(6)–F(0) set the value of FDAC for the baseband
lowpass filter -3dB cutoff frequency. (see the Baseband
LPFs section).
FDAC = 26 ✕ F(6) + ... +20F(0). (Default FDAC = 127.)
Byte 04 (Default = 02)
Bit ADL is the VCO ADC latch-enable bit. ADL = 1
latches ADC value (ADL = 0, default).
Bit ADE enables VCO tune voltage DAC read. ADE = 1
enables ADC read (ADE = 0, default).
Bit DL sets the differential output drive level for the
MAX2118 (default, DL = 0) (Table 6). This bit is unused
for the MAX2116.
Bits M(4)–M(0) set the value of M counter of lowpass fil-
ter BW control.
M = 24 ✕ M(4) + 23 ✕ M(3) + ... +20M(0). (Default M = 2.)
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