ADM660 datasheet(4/12 Pages) AD

4 / 12 page

REV. B

–4–

ADM660/ADM8660

Doubler Configuration (ADM660 Only)

Mnemonic

Function

Frequency Control Input for Internal Oscillator

and Charge Pump. With FC = Open, fCP =

25 kHz; with FC = V+, fCP = 120 kHz.

CAP+

Positive Charge-Pump Capacitor Terminal.

GND

Positive Input Supply.

CAP–

Negative Charge-Pump Capacitor Terminal.

OUT

Ground.

Low Voltage Operation Input. Connect to OUT.

OSC

Must be left unconnected in this mode.

V+

Doubled Positive Output.

PIN CONNECTIONS

8-Lead

TOP VIEW

(Not to Scale)

ADM660

OUT

OSC

V+

CAP+

GND

CAP–

TOP VIEW

(Not to Scale)

ADM8660

OUT

V+

CAP+

GND

CAP–

16-Lead

TOP VIEW

(Not to Scale)

ADM660

NC = NO CONNECT

OSC

V+

CAP+

OUT

GND

CAP–

Inverter Configuration

Mnemonic

Function

Frequency Control Input for Internal Oscillator

and Charge Pump. With FC = Open (ADM660)

or connected to GND (ADM8660), fCP = 25 kHz;

with FC = V+, fCP = 120 kHz.

CAP+

Positive Charge-Pump Capacitor Terminal.

GND

Power Supply Ground.

CAP–

Negative Charge-Pump Capacitor Terminal.

OUT

Output, Negative Voltage.

Low Voltage Operation Input. Connect to GND

when input voltage is less than 3.5 V. Above

3.5 V, LV may be connected to GND or left

unconnected.

OSC

ADM660: Oscillator Control Input. OSC is

connected to an internal 15 pF capacitor. An

external capacitor may be connected to slow the

oscillator. An external oscillator may also be

used to overdrive OSC. The charge-pump

frequency is equal to 1/2 the oscillator frequency.

ADM8660: Shutdown Control Input. This in-

put, when high, is used to disable the charge

pump thereby reducing the power consumption.

V+

Positive Power Supply Input.

PIN FUNCTION DESCRIPTIONS

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