ATR2731-ILQY Atmel, ATR2731-ILQY Datasheet - Page 13

• Manufacturer Part Number: ATR2731-ILQY
• Description: IC DAB ONE-CHIP FRONT END 44SSOP
• Manufacturer: Atmel

Specifications of ATR2731-ILQY

• Rf Type: DAB, Broadcast Radio
• Frequency: 70MHz ~ 260MHz
• Features: 8.5V Supply Voltage
• Package / Case: 44-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.2
4904A–DAB–03/06
Simple Two-wire Bus Data Transfer
I50 and I100 define the charge pump current:
Table 8-2.
Mi defines the operation mode:
Table 8-3.
Note:
Format:
START - ADR - ACK - <instruction set> - STOP
The <instruction set> consists of a sequence of A bytes, B bytes, C bytes and D bytes each fol-
lowed by ACK. A triplet of these bytes (A, B, C or D) must always be completed before a new
triplet is started. If no new triplet is started the transmission can be finished before the current
triplet is finished.
Examples:
START - ADR - ACK - DB1 - ACK - DB2 - ACK - DB3 - ACK - CB1 - ACK - CB2 - ACK - CB3 -
ACK - AB1 - ACK - AB2 - ACK - AB3 - ACK - BB1 - ACK - BB2 - ACK - BB3 - ACK - STOP
START - ADR - ACK - CB1 - ACK - CB2 - ACK - STOP
However:
START - ADR - ACK - DB1 - ACK - CB1 - ACK - STOP is not allowed.
Description:
START
STOP
ACK
ADR
Bi
High
Low
Low
M3
X
X
X
SW = High switches on the output current ( = A, B, C)
High
High
Low
Low
I50
Current of Charge Pump
Mode Selection
Start condition
Stop condition
Acknowledge
Address byte
byte i ( = A, B, C, D; i = 1, 2, 3)
High
High
Low
M2
X
X
X
High
High
Low
M1
X
X
X
High
High
I100
Low
Low
High
Low
Low
M0
X
X
X
RF mixer B active, f
RF mixer A active, f
RF mixer B active, f
Charge-pump Current
IF mixer switched off
f
(nominal) [µA]
LO,IFMIX
f
LO,IFMIX
Mode
100
150
200
50
= 2
LO,RFMIX
ATR2731
= f
LO,RFMIX
LO,RFMIX
ref
f
ref
= f
= f
= f
VCO
VCO
VCO
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