TDA6404 Datasheet, PDF (9/32 Pages) NXP Semiconductors – 5 V mixer/oscillator-PLL synthesizers for hyperband tuners

Philips Semiconductors
5 V mixer/oscillator-PLL synthesizers for
hyperband tuners
Product specification
TDA6404; TDA6405;
TDA6405A
Table 7 Read data format
NAME
Address byte
Status byte
BYTE
MSB⁽¹⁾
ADB
1
1
0
SB
POR
FL ACPS
Note
1. MSB is transmitted first.
BITS
0
0
1
1
MA1
A2
MA0
A1
LSB
R/W = 1
A0
ACK
A
−
Table 8 Description of symbols used in Table 7
SYMBOL
A
POR
FL
ACPS
A2, A1 and A0
DESCRIPTION
acknowledge
Power-on reset flag (POR = 1 at power-on)
in-lock flag (FL = 1 when the loop is locked)
automatic charge pump switch flag:
ACPS = 0; active
ACPS = 1; not active
digital outputs of the 5-level ADC (see Table 9)
Table 9 Analog-to-digital converter levels; note 1
A2
A1
A0
1
0
0
0
1
1
0
1
0
0
0
1
0
0
0
Note
1. Accuracy is ±0.03V_CC.
VOLTAGE APPLIED ON ADC INPUT
0.60V_CC to 1.00V_CC
0.45V_CC to 0.60V_CC
0.30V_CC to 0.45V_CC
0.15V_CC to 0.30V_CC
0 to 0.15V_CC
Power-on reset
The power-on detection threshold voltage V_POR is set to
V_CC = 2 V at room temperature. Below this threshold, the
device is reset to the power-on state.
At power-on state, the charge pump current is set to
280 µA, the tuning voltage output is disabled, the test
bits T2, T1 and T0 are set to logic 001 (automatic charge
pump switch ‘ON’) and RSB is set to logic 1.
PUHF is ‘OFF’, which means that the UHF oscillator and
the UHF mixer are switched off. Consequently, the VHF
oscillator and the VHF mixer are switched on. PVHFL and
PVHFH are ‘OFF’, which means that the VHF tank circuit
is working in the VHF I sub-band. The tuning amplifier is
switched off until the first transmission. In that case, the
tank circuit in VHF I is supplied with the maximum tuning
voltage. The oscillator is therefore working at the end of
the VHF I sub-band.
1999 Jan 13
9