Document
HA12232FP
Audio Signal Pre-Amp. for Car Deck
ADE-207-328 (Z) Target Specifications 1st Edition Sep. 2000 Description
HA12232FP is audio signal pre-amp. LSI providing PB equalizer op-amp. in one chip.
Function
• PB equalizer • Vref buffer × 2 channel × 1 channel
Features
• Built-in referential voltage (VREF) for PB equalizer decreases external components. • This IC is low noise. • This IC is strong for a cellular phone noise.
Operating Voltage Range
Product HA12232FP Min 6.5 Max 15 Unit V
Note: This IC is designed to operate on single supply.
HA12232FP
Pin Description, Equivalent Circuit (VCC = 9 V single supply, Ta = 25°C, No Signal, The value in the table shows typical value.)
Pin No. 7 Pin Name RIP Note V = VCC/2 Equivalent Circuit
VCC
Description Ripple filter
V
GND
1
VREF
V = VCC/2
VCC
Reference output
V 1
GND
10
EQOUT(L)
V = VCC/2
VCC
Equalizer output
V
GND
5 2
EQOUT(R) PBIN(R) PB equalizer input
PBIN NFI
13 3 12
PBIN(L) NFI(R) NFI(L) V = VCC/2 Equalizer output for time constant
Rev.1, Sep. 2000, page 2 of 14
HA12232FP
Pin Description, Equivalent Circuit (VCC = 9 V single supply, Ta = 25°C, No Signal, The value in the table shows typical value.) (cont.)
Pin No. 8 14 4 6 9 11 Pin Name VCC GND NC Note Equivalent Circuit Description Power supply GND pin
Rev.1, Sep. 2000, page 3 of 14
HA12232FP
Block Diagram
EQOUT(L) R6 180 C3 0.01µ R5 14
GND
VCC
R4 12k
13
PBIN(L)
12
NFI(L)
330k 11
NC
10
9
NC
8
− +
+
PBIN(R)
−
NFI(R)
VREF
1
2
3
4 R2 330k
5
6 C2 1µ
R1 180
C1 0.01µ
R3 12k EQOUT(R) Unit R: Ω C: F
Rev.1, Sep. 2000, page 4 of 14
RIP
NC
NC
7
+
HA12232FP
Absolute Maximum Ratings (Ta = 25°C)
Item Supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Max Pd Topr Tstg Rating 16 400 −40 to +85 −55 to +125 Unit V mW °C °C Ta ≤ 85°C Note
Electrical Characteristics (Ta = 25°C, VCC = 9 V, Rg = 680 Ω)
Specification Item Quiescent current Channel separation EQ gain Symbol IQ CT RL GV 1k GV 10k THD EQ maximum output Noise voltage level converted in input Note: 1. VCC = 6.5 V THD VOM VN Test Condition No signal Fin = 1kHz, Vin = 6mVrms Fin = 1kHz, Vin = 0.6mVrms Fin = 10kHz, Vin = 0.6mVrms Fin = 1kHz, Vin = 2.4mVrms Fin = 1kHz, THD = 1% Rg = 680Ω, Din-Audio Filter Min 1.5 50.0 37.0 33.0 300 Typ 2.2 60.0 40.0 36.0 0.1 600 0.7 Max 3.2 43.0 39.0 0.5 1.5 Unit mA dB dB dB % mVrms µVrms *1 Remark
Rev.1, Sep. 2000, page 5 of 14
HA12232FP
Functional Description
Power Supply Range HA12232FP is designed to operate on single supply only. Table 1
Product HA12232FP
Supply Voltage Range
Single Supply 6.5 V to 15.0 V
Reference Voltage HA12232FP provides the reference voltage of half the supply voltage that is the signal grounds. As the peculiarity of this device, the capacitor for the ripple filter is very small about 1/100 compared with their usual value. The block diagram is shown as figure 1.
8 VCC
+ − 14 7 1
Figure 1 The Block Diagram of Reference Supply Voltage
Rev.1, Sep. 2000, page 6 of 14
HA12232FP
Input Block Diagram and Level Diagram
Vref 0.6mVrms (−62.2dBs) PBIN 60mVrms (−22.2dBs) PB-EQ Amp. EQOUT
+ −
NFI R2 330k
R1 180
C1 0.01µ
R3 12k
PB-EQ Amp. Gv = 40 dB, f = 1 kHz
Figure 2 Input Block Diagram Cutoff Frequency, Gain of PB-EQ Amp.
Transfer Function G0 T = R2 [w2 c12 (R2 + R3) (R1 + R3) + 1] / R1 [w2 c12 (R2 + R3)2 + 1] + j ⋅ R2w c12 (R1 − R2) / R1 [w2 c12 (R2 + R3)2 + 1] Cutoff Frequency GV G∞ fc = {[−b ± (b2 − 4a)1/2] / 2a} / 2π a = 2c14 (R2 + R3)2 (R3 + R1)2 b = [3 (R2 + R3) (R3 + R1) − (R2 + R3)2 − (R3 + R1)2] c12 Changing the value of each element to one shown in figure 2, will be as follows. fc1 f fc2 fc1 = 50 Hz, fc2 = 1300 Hz PB-EQ Amp. Gain (f = 0, ∞) f=0 T0 = R2 / R1 G0 = 65.3 dB f=∞ T∞ = R2 (R3 + R1) / R1 (R2 + R3) G∞ = 36.3 dB
Figure 3 Cutoff Frequency of PB-EQ Amp.
Rev.1, Sep. 2000, page 7 of 14
Test Circuit
HA12232FP
R10 10k C8 2.2µ R4 12k
+
C5 22µ R5 12 330k 11 10 9 8
NC
NC
GND
PBIN(L)
NFI(L)
EQOUT(L)
− +
VCC
VREF
PBIN(R)
NFI(R)
NC
NC
1 330k R7 680 R1 180 C1 0.01µ C7 2.2µ R9 10k
+
2 C2 1µ
3
5
EQOUT(R)
6
4 R2
C4 22µ R3 12k
+
Notes: 1. Resistor tolerance ±1% 2. Capacitor tolerance ±1% 3. Unit R: Ω, C: F
RIP
Rev.1, Sep. 2000, page 8 of 14
R6 R8 180 680 C3 0.01µ C6 100µ
+
DC +9V SOURCE1
+
14
13
AC VM2 Lch Rch SW2 Distortion analyzer Oscillo scope Noise meter Lch Rch SW3 DC VM1
AUDIO SG
Lch
AC VM1
+ −
SW1 Rch
7
+
HA12232FP
Characteristic Curves
Quiescent Current vs. Supply Voltage 3.0
Quiescent Current IQ (mA)
2.5
2.0
1.5 5 6 7 8 9 10 11 12 13 Supply Voltage (V) 14 15 16
−40
Channel Separation vs. Frequency (L→R, R→L)
−60
Channel Separation (dB)
−80
−100
−120
−140 10
100
1k Frequency (Hz)
10k
100k
Rev.1, Sep. 2000, page 9 of 14
HA12232FP
EQ Amp. Gain vs. Frequency 80
70
60
EQ Gain (dB)
50
40
30 VCC = 9.0 V PBIN→EQOUT 20 10 100 1k Frequency (Hz) 10k 100k
Total Harmonic Distortion vs. Supply Voltage 1.0 100 Hz (30 kHz LPF) 1 kHz (4.