4

LTC1591/LTC1597

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Analog Outputs (Note 4)

Output Capacitance (Note 4)

q

115

130

pF

q

70

80

pF

Digital Inputs

Digital Input High Voltage

q

2.4

V

Digital Input Low Voltage

q

0.8

V

Digital Input Current

q

0.001

±1

µA

Digital Input Capacitance

q

8pF

Timing Characteristics

Data to WR Setup Time

q

60

20

ns

Data to WR Hold Time

q

0

–12

ns

WR Pulse Width

q

60

25

ns

LD Pulse Width

q

110

55

ns

Clear Pulse Width

q

60

40

ns

WR to LD Delay Time

q

0ns

Power Supply

Supply Voltage

q

4.5

5

5.5

V

Supply Current

q

10

µA

range.

Note 1: Absolute Maximum Values are those beyond which the life of a

device may be impaired.

Note 2:

±1LSB = ±0.006% of full scale = ±61ppm of full scale for the

LTC1591/LTC1591-1.

±1LSB = ±0.0015% of full scale = ±15.3ppm of full

scale for the LTC1597/LTC1597-1.

Note 3: Using internal feedback resistor.

Note 4: Guaranteed by design, not subject to test.

Note 6: Typical temperature coefficient is 100ppm/

°C.

Note 8: To 0.006% for a full-scale change, measured from the rising edge

of LD for the LTC1591/LTC1591-1. To 0.0015% for a full-scale change,

measured from the rising edge of LD for the LTC1597/LTC1597-1.

all 1s to all 0s.

(J/

°K), R = resistance (Ω), T = temperature (°K), B = bandwidth (Hz).

Note 12: Midscale transition code: 01 1111 1111 1111 to 10 0000 0000

0000 for the LTC1591/LTC1591-1 and 0111 1111 1111 1111 to 1000

0000 0000 0000 for the LTC1597/LTC1597-1.

Note 14: Measured using the LT1468 op amp in unipolar mode for I/V

converter and LT1468 I/V and LT1001 reference inverter in bipolar mode.