Datasheet

5
LTC1591/LTC1597
15917fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Unipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency
(LTC1591/LTC1597)
FREQUENCY (Hz)
–90
SIGNAL/(NOISE + DISTORTION) (dB)
–70
–50
–40
10 1k 10k 100k
1591/97 G03
–110
100
–60
–80
–100
V
CC
= 5V USING AN LT1468
C
FEEDBACK
= 30pF
REFERENCE = 6V
RMS
500kHz FILTER
80kHz FILTER
30kHz FILTER
Midscale Glitch Impulse
TIME (μs)
0
OUTPUT VOLTAGE (mV)
–10
0
10
0.6
1.0
1591/97 G01
–20
–30
–40
0.2 0.4 0.8
20
30
40
USING AN LT1468
C
FEEDBACK
= 30pF
V
REF
= 10V
1nV-s TYPICAL
Full-Scale Settling Waveform
GATED
SETTLING
WAVEFORM
500μV/DIV
LD PULSE
5V/DIV
500ns/DIV
1591/97 G02
USING LT1468 OP AMP
C
FEEDBACK
= 20pF
0V to 10V STEP
Bipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency, Code = All Zeros
FREQUENCY (Hz)
–90
SIGNAL/(NOISE + DISTORTION) (dB)
–70
–50
–40
10 1k 10k 100k
1591/97 G04
–110
100
–60
–80
–100
V
CC
= 5V USING TWO LT1468s
C
FEEDBACK
= 15pF
REFERENCE = 6V
RMS
500kHz FILTER
80kHz FILTER
30kHz
FILTER
Bipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency, Code = All Ones
FREQUENCY (Hz)
–90
SIGNAL/(NOISE + DISTORTION) (dB)
–70
–50
–40
10 1k 10k 100k
1591/97 G05
–110
100
–60
–80
–100
V
CC
= 5V USING TWO LT1468s
C
FEEDBACK
= 15pF
REFERENCE = 6V
RMS
500kHz FILTER
80kHz FILTER
30kHz FILTER
Supply Current vs Input Voltage
INTPUT VOLTAGE (V)
0
SUPPLY CURRENT (mA)
3
4
5
4
1591/97 G06
2
1
0
1
2
3
5
V
CC
= 5V
ALL DIGITAL INPUTS
TIED TOGETHER
Logic Threshold vs Supply Voltage
SUPPLY VOLTAGE (V)
0
0
LOGIC THRESHOLD (V)
0.5
1.0
1.5
2.0
3.0
1
234
1591/97 G07
576
2.5