6

LTC1595/LTC1596/LTC1596-1

TYPICAL PERFOR A CE CHARACTERISTICS

LTC1595

of the current to voltage converter op amp.

OUT1 (Pin 3): Current Output Pin. Tie to inverting input of

current to voltage converter op amp.

GND (Pin 4): Ground Pin.

LD (Pin 5): The Serial Interface Load Control Input. When

LD is pulled low, data is loaded from the shift register into

the DAC register, updating the DAC output.

SRI (Pin 6): The Serial Data Input. Data on the SRI pin is

latched into the shift register on the rising edge of the serial

clock. Data is loaded MSB first.

CLK (Pin 7): The Serial Interface Clock Input.

Requires a bypass capacitor to ground.

LTC1596/LTC1596-1

OUT1 (Pin 1): True Current Output Pin. Tie to inverting

input of current to voltage converter op amp.

OUT2 (Pin 2): Complement Current Output Pin. Tie to

analog ground.

AGND (Pin 3): Analog Ground Pin.

STB1, STB2, STB3, STB4 (Pins 4, 8, 10, 11): Serial

Interface Clock Inputs. STB1, STB2 and STB4 are rising

edge triggered inputs. STB3 is a falling edge triggered

input (see Truth Tables).

LD1, LD2 (Pins 5, 9): Serial Interface Load Control Inputs.

When LD1 and LD2 are pulled low, data is loaded from the

shift register into the DAC register, updating the DAC

output (see Truth Tables).

SRO (Pin 6): The Output of the Shift Register. Becomes

valid on the active edge of the serial clock.

SRI (Pin 7): The Serial Data Input. Data on the SRI pin is

latched into the shift register on the active edge of the

serial clock. Data is loaded MSB first.

DGND (Pin 12): Digital Ground Pin.

CLR (Pin 13): The Clear Pin for the DAC. Clears DAC to zero

scale when pulled low on LTC1596. Clears DAC to midscale

when pulled low on LTC1596-1. This pin should be tied to

5.5V. Requires a bypass capacitor to ground.

output of the current to voltage converter op amp.

Supply Current

vs Logic Input Voltage

INPUT VOLTAGE (V)

0

0.6

0.8

1.0

4

1595/96 G10

0.4

0.2

0.5

0.7

0.9

0.3

0.1

0

1

2

3

5

Logic Threshold

vs Supply Voltage

SUPPLY VOLTAGE (V)

0

1.0

2.0

3.0

0.5

1.5

2.5

1595/96 G11

10

05

16

27

38

49