LB1409.PDF

Ordering number: EN683D

Monolithic Digital IC

LB1409

Level Meter Driver for 9 LEDs

Applications

. AC level meters such as VU meters.

Package Dimensions

unit : mm

3064-DIP16

Functions

. Display

Nine red or green LEDs display the input level in the shape

of a bar.

. Input amplifier

Wide application is available owing to built-in DC amplifier

whose gain is variable with external resistors.

. Comparator level

Setting is made by steps of 3 dB as follows.

–18 dB, –15 dB, –12 dB, –9 dB, –6 dB, –3 dB, 0 dB,

+3 dB, +6 dB

. Supply voltage

The recommended supply voltage range is so wide as 5.5 V

to 16 V.

(If pin Vref 2 is used, 7 V to 16 V.)

. Reference voltage

Constant voltage output is available with external transistor

owing to pin Vref2=5V.

[LB1409]

SANYO : DIP16

Specifications

Comparator Level OUT Pin Voltage at Ta = 25°C, V CC =12V,Vref1=3V

Comparator level

Pin No.

min

typ

max

Unit

0.11

0.18 *

0.25

0.20

0.27 *

0.34

0.30

0.38 *

0.46

0.45

0.53 *

0.61

0.66

0.75

0.84

0.97

1.06

1.15

1.40

1.50

1.60

2.02

2.12

2.22

2.90

3.00

3.10

*: No overlap occurs in each individual IC.

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

53096HA(II)/8237KI/8205MW/7140KI,TS No.683-1/4

. DC level meters such as signal meters.

LB1409

Absolute Maximum Ratings at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

V CC max Pin 1

−0.3 to +18

Input voltage

V IN

Pin 3, 4

−0.3 to V CC

D1 to D9 output voltage

V OUT (D) D1 to D9 off

−0.3 to +18

D1 to D9 output current

I OL (D)

Pin 7 to 15, D1 to D9 on

+30 mA

First reference flow-out current

Iref (1)

Pin 2

−1 to 0 mA

Second reference flow-out current

Iref (2)

Pin 16

−6 to 0 mA

V OUT supply voltage

V OUT

Pin 5

−0.3 to +6

Allowable power dissipation

Pd max

Ta = 55°C

500 mW

Operating temperature

Topr

−10 to +60 °C

Storage temperature

Tstg

−40 to +125 °C

Allowable Operating Ranges at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Supply voltage

V CC

Pin 1,

( ): Using Vref 2

+5.5 to +16 V

(+7 to +16) V

Input voltage

V IN + or V IN –

Pin 3 or Pin 4

–0.3 to +V CC V

Output pin load resistance

R L

Between pin 5 OUT and pin 6 GND.

15 k to 20 k

Electrical Characteristics at Ta = 25°C, V CC =12V

Parameter

Symbol

Conditions

min typ max Unit

Input bias current (Amplifier)

I IN + (A) Pin 3, V IN + =0V,V IN – =3V,GND=0V

–2

0 µA

I IN − (A) Pin 4, V IN + =3V,V IN – =0V,GND=0V

–2

0 µA

Input bias current (Comparator)

+ Output leakage current

I IN + (C) +

I OL (A)

Pin 5, V IN + =0V,V IN – =3V,OUT=0V,

GND=0V

–10

0 µA

Offset voltage (1)

Voffset (1)

Pin 5, V CC =6V,V IN + =V IN – =0V,GND=–6V,

GAIN=20dB

–180

+180 mV

Offset voltage (2)

Voffset (2)

Pin 5, V IN + =V IN – =0V,GND=0V,

GAIN=20dB

+180 mV

First reference voltage

Vref (1) Pin 2, Iref=0to1mA

2.6

3.0 V

Second reference voltage

Vref (2) Pin 16, Iref=0to6mA

4.2 4.7 5.2 V

Current drain

I CC Pin 1, V IN + =3V,V IN – = 0 V

10 20 mA

Amplifier gain

VG Open loop

Output flow-out current

I OH Pin 5, V IN + =3V,V IN – =0V,V OUT = 0 V

–10 mA

Pin 7 to 15, D1 to D9, I OL = 20 mA, V IN + =3V,

V IN – =0V

D pin output ON voltage

V OL (D)

1.2 V

Pin 7 to 15, D1 to D9, V IN + =0V,V IN – =3V,

V D1 to D9 =12V

D pin output leak current

I OH (D)

10 µA

Pin 5, V CC = 5.5 V, V IN + =3V,V IN – =0V,

R L =15k

Output voltage (Amplifier)

V OH

Pin 5, V CC =12V,V IN + =3V,V IN – =0V,

R L =15 k

9.5

No.683-2/4

LB1409

Pd max – Ta

Ambient temperature, Ta – °C

Pin Assignment

Equivalent Circuit

Unit (resistance:

)

Internal resistance: R7 (2.34 k W ), R6 (1.66 k W ), R5 (1.17 k W ),

R4 (830 W ), R3 (586 W ), R2 (414 W )

No.683-3/4

LB1409

Sample Application Circuits

(All with offset adjustment)

. Circuit not using Vref 2

Adjusting procedures

1. Turn the center of 10 k

VR largely to 4.7 µF

capacitor side.

2. Input AC signal of 50/u2 mV from AC IN.

3. Adjust 1 kW VR so that the output at OUT becomes

500 mV DC.

Equation used in the calculation of R to be inserted

in series with LED.

Gain:20dB

R (red) = (V CC –2.5)/6kW

R (green) = (V CC –2.8)/18kW

. Circuit using Vref 2

Unit (resistance: W , capacitance: F)

Adjusting procedures

. R to be inserted in series with LED is as follows

irrespective of V CC .

R (red) = 360 W (Approx. 6 mA)

R (green) = 100 W (Approx. 18 mA)

. TR1 should be chosen with P C considered; and the

following transistors are recommended.

Red LED drive 2SD400

Green LED drive 2SD325

Unit (resistance: W , capacitance: F)

No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,

nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or

indirectly cause injury, death or property loss.

Anyone purchasing any products described or contained herein for an above-mentioned use shall:

1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors

and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and

expenses associated with such use:

2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO

ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume

production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use

or any infringements of intellectual property rights or other rights of third parties.

This catalog provides information as of May, 1996. Specifications and information herein are subject to change without notice.

No.683-4/4

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