LTC2662 datasheet(12/28 Pages) AD

12 / 28 page

LTC2662

Rev 0

For more information www.analog.com

VCC (Pin 13): Analog Supply Voltage. 2.85V ≤ VCC ≤ 5.5V.

Bypass to GND with a 1µF capacitor.

V– (Pins 15, 26): Negative Supply Voltage. –15.75V ≤ V–

≤ GND. Bypass to GND with a 1µF capacitor unless V– is

connected to GND.

OUT0 to OUT4 (Pins 24, 23, 20, 19, 16): DAC Analog

Current Outputs. Each current output pin has a dedicated

analog supply pin VDD0 to VDD4. The operational voltage

level range at these pins is V– ≤ VOUTX ≤ VDDX.

VDD0 to VDD4 (Pins 25, 22, 21, 18, 17): Output Supply

Voltages. 2.85V ≤ VDD0-4 ≤ V+. These five positive sup-

ply inputs provide independent supplies for each of the

five DAC current output pins OUT0 to OUT4 respectively.

Bypass each supply input to GND separately with a 1µF

capacitor.

V+ (Pin 27): Positive Supply Voltage. 2.85V ≤ V+ ≤ V–

+ 33V. V+ must always be greater than or equal to the

largest of the five DAC positive supply voltages VDD0-4

and VCC. The supply voltage difference (V+ – V–) can-

not exceed 33V maximum. Bypass to GND with a 1µF

capacitor.

PIN FUNCTIONS

MUX (Pin 28): Analog Multiplexer Output. Pin voltages

and currents can be monitored by measuring the volt-

age at the MUX pin. When the mux is disabled, this pin

becomes high impedance. The available mux selections

are given in Table 4.

IOVCC (Pin 29): Digital Input/Output Supply Voltage.

1.71V ≤ IOVCC ≤ VCC + 0.3V. Bypass to GND with a 0.1µF

capacitor.

FAULT (Pin 30): Active-Low Fault Detection Pin. This

open-drain N-channel output pulls low when any valid

fault condition is detected. This pin is released on the next

CS/LD rising edge. A pull-up resistor is required.

CLR (Pin 31): Active-Low Asynchronous Clear Input. A

logic low at this level-triggered input clears the part to the

default reset code and output range which is zero-scale

and high impedance (Hi-Z) outputs. The control registers

are cleared to zero. Logic levels are determined by IOVCC.

EXPOSED PAD (Pin 33): Ground. Solder this pad directly

to the analog ground plane.

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