Block Diagram

HA16631P,

H A 1 6 6 3 1 M P - - - -

Read Ampllfler

Description

The HA16631P and HA16631MP monolithic read amplifiers for flexible disk drives provide wave- shaped output signals. The differentiator, zero-volt comparator generate data pulses from the amplified signals from the magnetic head and waveform shaper section.

Features

• Combines all the flexible disk read amplifier function active circuits in one chip

• Direct connection with 1TLs

Block Diagram

Fitter Network

12V

r---

HA16631P

HA16631MP

,

I 1 Peak : Detector

...__ __ __,:

(DP-18A)

•

(MP-18)

o· 1ta1

o:s!tpu1

1 I I I I I I I

o-,.--~- I L - - - - - J

I I

-'Waveform Shape

---

. . . - - - + D.F.F

Magnetic Head

Gain Select OneShot 1

Q

OneShot2

sv

Pin Arrangement

HA16631P

HA16631MP

Amp.

Input Offset Decoupling

GND One- { Shot 1

One- { Shot 2

Vcc2

} Amp.

Output

} Diff.

Input

} Diff.

Comp.

Vcc1 Data Output

(Top view)

Offset Decoupling 3

Offset Decoupling 4

GND 5

One-Shot 1 6

One-Shot 1 7 Amp Input

2

Amp Input

1

8 9

One- One- Shot 2 Shot 2

0

Amp VCC2 Output

18 17

10 11 Data Vcc1 Output

(Top view)

16 Amp _Output

15 Diff.

Input

14 Diff.

Input

13 Diff.

Comp.

12 ^Diff.

Comp.

HA16631 P, HA16631MP

Absolute Maximum Ratings (Ta = 25°C)

Item Symbol Rating Unit

Power supply voltage (Pin 11) vcc1 7.0 v

Power supply voltage (Pin 18) VCC2 16 v

Input voltage (Pins 1 and 2) VIN -0.2 to +7.0 v

Output voltage (Pin 10) Vo -0.2 to +7.0 v

Differential input voltage (Pins 1 and 2) VIN (diff) Oto +5.0 v

Operating temperature Topr Oto +70

oc

Storage temperature Tstg -55 to +125

oc

Electrical Characteristics

Operating Power Supply Voltage Range (Ta = 25°C)

Item Symbol Min Typ Max Unit Test Condition Test Circuit

Power supply voltage range Vcc1R 4.75 5.00 5.25

v

Power supply voltage range Vcc2R 10.0 12.0 14.0

v

Amplifier Section (Ta= 25°C, Vcc1 = 5.0 V, Vcc2 = 12.0 V, unless otherwise specified)

Item Symbol Min Typ Max Unit Test Condition Test Circuit Differential voltage gain AVD 80 110 140 VIV f = 250 kHz, Fig. 2

VIN= 5 m Vrms VCC1R, VCC2R

Input bias current llB 1 9 µA Vcc2 = 12 v, Fig. 4

VCM= 4 V

Common mode voltage range VcM 1.85 6.2 v Fig. 2

Output distortion ratio THD 1.5 5 % f = 1 kHz, Fig. 2 VIN = 25 mVp-p VCC1R, VCC2R

Differential output VOD 3.0 4.2 Vp-p VCC1R, VCC2R Fig 2 voltage swing

Output source current lo 8.0 mA Fig. 8

Output sink current los 2.8 4 mA VCC1R, VCC2R Fig. 9 (Pins 16 and 17)

Input resistance rlN 30 120 ^k.Q Fig. 5

Output resistance ro 15

n

Common mode rejection CMRR 50 dB f = 100 kHz, Fig. 11

ratio VIN = 200 mVp-p

Item Symbol Min

TYP

vee1 4.75 V~Vee1

~ 5.25 v

Power supply rejection ratio PSRR2 60 dB vee1=5.0 v Fig. 10

vee2 10.0 v ~ Vee2

~14.0 v

Differential output offset VDO 0.4 v Fig. 7

voltage

Common mode output voltage Veo 3.1 v Fig. 7

Effective differential emitter REFF 370 570 770

n

Peak Detector Section (Ta= 25°C, Vcc1=5.0 V, Vcc2 = 12.0 V, unless otherwise specified)

Item Symbol Min Typ Max Unit Test Condition Test Circuit

Sink current (Pins 12 and 13) ISO 1.0 1.5 mA Fig. 12

Peak shift Ps 5 % f = 250 kHz, Fig. 13

VIN = 1.0 Vp-p

Input resistance rlD 30 kn Fig. 17

Outupt resistance rQP 40

n

HA 16631 P, HA 16631 MP

Waveform Shaper Section (Ta

=

hem Symbol Min Typ Max Unit Test Condhlon Test Circuit

Output voltage H (Pin 10) VOH 2.7 v vcc1=4.75 v Fig. 15 Vcc2 = 12.0 v,

IOH =-0.4 mA

Output voltage L (Pin 10) VOL 0.5 v Vcc1=4.75 v Fig. 16 Vcc2 = 12.0 v,

IOL= 8 mA

Rising time (Pin 10) tTLH 25 ns Vcc1=5.0 V, Fig. 14

Vcc2 = 12.0 v Vout = 0.5 V

--+ 2.7 v

Falling time (Pin 10) tTHL 25 ns vcc1=5.0 v, Fig. 14

vcc2 = 12.0 v Vout = 2.7 V

--+ 0.5 v Timing range #1 t1A, B 600 2000 ns f = 125 kHz

600 1000 ns f = 250 kHz

Timing accuracy #1 t1 850 1000 1150 ns t1 = 0.625 C1 R1 Fig. 14 +150

C1 = 200 pF, R1=6.8 kn

Timing capacitance #1 C1 150 680 pF Fig. 14

Timing resistance #1 R1 1.5 10 kn Fig. 14

Timing range #2 t2A, B 150 1000 ns f = 125 kHz 150 750 ns f = 250 kHz

Timing accuracy #2 t2 170 200 230 ns t1 = 0.625 C1R1 Fig. 14 C1 = 200 pF,

R1=1.6 kn

Timing capacitance #2 C2 100 800 pF Fig. 14

Timing resistance #2 R2 1.5 10 kn Fig. 14

Test Circuits

4V

2.5 µF

V;n 510

4V

12 v

2 17

--

3 16

4 15

5 14

6 13

7

8 11 5V

9 10

--

1.6k0

6.4k0

Figure 1 Power Supply Current

4V

2 3 4 5 6 7 8 9

1.6k0

6.4k0 18 17 16 15 14 13 12 11 10

12 v

1.5k0

4.75V

Av= Vo16 - Vo17 Vin

Figure 2 Voltage Gain, Band-width, Output Voltage Swing,

Output Distortion Ratio

HA16631 P, HA16631MP

2.5 !IF

18

2 17

3 16

4 15

5 14

6 13

7 12

8 11

9 10

1.6k0

6.4k0

12V VoutR (0)

Vin =5 m Vrms f

=

Av Vout

1---.---< ^{l 5} v 2 Vin Re Rrx

re+ =Am

7iir -1 500

= VoutO _ VoutR 1 Rex=500n

Figure 3 Pre-Amplifier Section Effective Emitter Resistance (Pins 3 and 4)

llBI

,._._

18 12V

2 17

3 16

4 15

4V 5 14

6 13

7 12

8 11 5V

9 10

1.6k0

6.4k0 Measure llR2 in the same way.

Figure 4 Input Bias Current

Vin 51 n

2.5µF 4V

2.5 µF

4V

18

2 17

4V

3 16

4 15

5 14

6 13

7 12

8 11

9 10

1.6k0

6.4k0

1 - - - < ) 12 v

1---,V~R (0)

---<1

V VoubR • Riex IN

=

Rjex

=~ VOOfFr -1 Riex = 100 kn

Figure 5 Input Resistance

18 12 v

2 17 Vout R

1~:1

3 16

4 15

5 14

6 13

7 12

8 11 5V

9 10

Vout = Vo~ - V~ut R • Roex out

= Roex (Vout ⁰⁰NoutR-1) 1.6k0

Roex = 500'1 6.4k0

Figure 6 Output Resistance

HA 16631 P, HA 16631 MP

4V 18 12V

2 17 V11

3 16 V1&

4 15

5 14 Voo = I V11 - V1s I

6 13

7 12

8 11 5V

9 10

1.6k0

6.4k0

Figure 7 Differential Output Offset Voltage, Common Mode Output Voltage

4 v 1 8 t - - - < J

~-.... 2 17.__~---f

3 16

4 15

...-~5 14

6 13

,..---~ 7 12t---.

8 11 t - - - - 1 1 - - · u 5 V

...-~g 10

1.6 kO

6.4k0

Measure pin 16 in the same way.

Rco: V11 (oo)

{V11(⁰⁰)-V1.,(R)J :;0.1 V

Figure 8 Output Source Current

18 12V

2 17

-

3 5V

4 15

4V 5 14

6 13

7 12

8 11 5V

9 10

1.6k0 Measure pin 12 in the same way.

6.4k0

Figure 9 Output Sink Current

500

18 Vcc2

2 17

~

500 ~ + 3kO

3 16

4V - + 4 15

10mF

5 14

200pF

6 13

7

8 11 Vcc1

9 10

Fluke 8375A Digital Multimeter.

Figure 10 Power Supply Rejection Ratio

HA16631 P, HA16631 MP

2.5 µF

Vin 51 n

4V

2 3 2.5µF

4 5 6 7 8 9

1.6k0

6.4k0

18 ' t - - - 1 . J 12 v

17 16 15 14 13 12 11 10

1 - - - n Vo11

,___ _ _ _ _ ,} Vo1&

1---<----n 5 v

Vin = 200 mVp-p f =-1.0 MHz

100 VIN CMRR = 20 log10

v

vo

Perform measurement using Vector Voltmeter hp8405A or equivalent.

Figure 11 Common Mode Rejection Ratio

4V 18 12 v

2 17

3 16

4 15

5 14

6 5V

7 12

8 11 5V

9 10

1.5k0

6.4k0

Measure pin 2 in the same way.

Figure 12 Differentiator Output Sink Current

4V

C1 200pF

18 12V

2 17

3 16 f = 250 kHz

4 15 Vin = 1.0 Vp-p

5 14

6 13 1kn 0.1 µF

7 12

-11

8 11 sv

200p

9 10 sv

R2 1.6 kn

R1 6.4 kn

Pin 10 tps,

Vout

~ ~

1.5V_ --- - - ·

lps2

.n...__

PS= 1/2 • tps 1 - tps2 x 100%

tps1 + tps2

Figure 13 Peak Shift

HA16631P, HA16631MP

4V

C1 200pF

C2 200pF

ov

Vout Pin 10

2

3 16

4 5

6 13

7 12

8 11

9 10

R₂ 1.6kn

R1 6.Bkn

l1A l1e

1.5V 1.SV

12V

1 kn 0.1 µF 400 mVp-p

"Voo,

11

v ..

Vout Pin 10

tTLH = tTHL = 10 ns

f = 250 kHz 50% Duty Cyde

ttA

EnA = 1,000 ns x 100%

t1e

Ene = 1,000 ns x 100%

Et2 = t2

200 ^{ns x} 100%

Figure 14 Timing Accuracy, Rising Time, Falling Time

4V 18 12 v

2 17

3 16

4 15

5 14

6 13

7 12

8 11 4.75V

9 10 VOUT

1400µA

6.4k0

Figure 15 Output Voltage High (Pin 10)

4V 18 12 v

2 17

3 16

4 15

5 14

6 13

7 12

!

8 11 5V

9 10 Vour

1.6k0

6.4k0

Figure 16 Output Voltage Low (Pin 10)

HA16631 P, HA16631 MP

~

Differentiator Input (Pins 12 and 13)

Differentiator Output

Comparator Output

1 18

Other Pins Open

2 17

3 16

_,

4 15 ~ _{} 0.5V}

5 14

6 13

7 12

8 11

9 10

R =

I(~~)

Figure 17 Input Resistance

I I I I I I I

I I I I I I I

One Shot# 1 Q

I I I I I I I

---t.I si q P q r ⁰ r=

I I I I I

D-Flip-Flop

Q

One Shot# 2 Q Pin 10

I I I I

I I I I

I : I .--1

I I I I

I I

I

-H-t2

0

I I I I

I I I I

I I I I

: n o o

Figure 18 Timing Waveforms

~

'°

riQ"

=

~ \C

n

5. -

=

'O

a

;" ^300pF

5.6 "1

2kn

HA178M05P

10 kn

Vcc1

I I ^o

-1LJL

I

...

O>

O>

(..)

...

.""O

I

...

O>

O>

(..)

...

3::

""O

HA 16631 P, HA 16631 MP

6

IO C\I

-

-

(\;

-

-

>

- - ⁺ -

>

Cl>

O>

-

0

>

-

Cl>

-0 0

E _I c 0

E E

(.) 0

1 1

Vcc1 R

Vcc2R f = 125 kHz

Vin = 0.4 V

0 10 20 30 40 50 60 70 80

Ambient Temperature Ta (°C)

Figure 20 Timing Accuracy vs Ambient Temperature

8

7

6

1 1

Vcc1=5 V

VCC2= 12 V

r---...

---...

~ r----.J _r--....

~ r----.J

0 10 20 30 40 50 60 70 80

Ambient Temperature Ta (°C)

Figure 21 Common-Mode Input Voltage vs Ambient Temperature

> ^1.8

- I

e ^1.6

>

~

1.4

>

s ^1.2

a. c:

~ ^1.0 E

5 0.8 E E

(..) 0.6 0

I ^I

Vcc1=5 V -

VCC2= 12 V

10 20 30 40 50 60 70 80

Ambient Temperature Ta (°C)

Figure 22 Common-Mode Input Voltage vs Ambient Temperature

-

_1.2

I .::c:.

0 0

T""

-

1.0

>

~ Cl

> 0.8

<(

...

N

""'

"(ij c:

0.6

(.!) Cl>

O>

-

^0.4

>

0.2

100k 200k 500k 1M 2M SM 10M

Frequency f (Hz)

Figure 23 Voltage Gain vs Frequency

HA16631P, HA16631MP

6

1.05

~

u

:::::::

u

-

~

....

(.) :J

>-

1.00

a. _g.

0.95

en

T T

Vcc1 R _ Vcc2R

0 10 20 30 40 50 60 70 80

Ambient Temperature Ta (°C)

Figure 24 Supply Current vs Ambient Temperature (1)

6

1.05

~

C\I () ()

:::::::

() C\I ()

1.00

-

_{.... ....}

(.) :J

>-

a. _g.

0.95

en

T I

V CC1 R

Vcc2R

-

r---... _~

~

0 10 20 30 40 50 60 70 80

Ambient Temperature Ta (°C)

Figure 25 Supply Current vs Ambient Temperature (2)

0 1.05

&-,

~ 0

>

~ _>

< 1.00

·ca

CJ

CJ)

g>

g - 0.95

I I

Vcc1 R _ Vcc2R

...._

-

0 10 20 30 40 50 60 70 80

Ambient Temperature Ta (°C)

Figure 26 Voltage Gain vs Ambient Temperature

~ 1.05

IO

-

-

...

'r'"

- _~

1.00 ....

::J 0

<

.E

i= 0.95

I I

Vcc1 R

Vcc2R f = 125 kHz Vin = 0.4 V

0 10 20 30 40 50 60 70 80

Ambient Temperature Ta (°C)

Figure 27 Timing Accuracy vs Ambient Temperature