MAX7057ASE+ Maxim Integrated Products, MAX7057ASE+ Datasheet - Page 15

• Manufacturer Part Number: MAX7057ASE+
• Description: RF Transmitter IC TRANSMITTER ASK/FSK
• Manufacturer: Maxim Integrated Products

Specifications of MAX7057ASE+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The 4 MSBs of HIFREQ1 (fhi[15:12]) are the integer
portion of the divider, excluding offset of 16. The 12
LSBs (fhi[11:0]) are the fractional part of the divider.
The 4 MSBs of LOFREQ1 (flo[15:12]) are the integer
portion of the divider, excluding offset of 16. The 12
LSBs (flo[11:0]) are the fractional part of the divider.
Valid values for the divider are shown in Table 11.
Table 6. ckdiv[2:0] of Configuration 0 Register (Address: 0x01)
Table 7. High-Frequency 1 Register (Address: 0x02)
Table 8. High-Frequency 0 Register (Address: 0x03)
Table 9. Low-Frequency 1 Register (Address: 0x04)
Table 10. Low-Frequency 0 Register (Address: 0x05)
Table 11. Maximum and Minimum Values for Frequency Divide
BIT
DECIMAL
BIT
BIT
BIT
7-0
7-0
7-0
7-0
300MHz to 450MHz Frequency-Programmable
4-7
0
1
2
3
DECIMAL VALUE
flo[15:8]
fhi[15:8]
flo[7:0]
fhi[7:0]
NAME
NAME
NAME
NAME
12.0220
2.9536
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8-bit upper byte of low-frequency divider for FSK/ASK
8-bit upper byte of high-frequency divider for FSK
8-bit lower byte of high-frequency divider for FSK
8-bit lower byte of low-frequency divider for FSK/ASK
BINARY
1XX
000
001
010
011
fhi[15:12], flo[15:12]
0xC
0x2
CRYSTAL FREQUENCY DIVIDED BY
ASK/FSK Transmitter
FUNCTION
FUNCTION
FUNCTION
FUNCTION
16
1
2
4
8
fhi[11:0], flo[11:0]
0x05A
0xF42
15