4
LTC1599
sn1599 1599fs
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Unipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency
Full-Scale Settling Waveform
Midscale Glitch Impulse
TIME (µs)
0
OUTPUT VOLTAGE (mV)
–10
0
10
0.6
1.0
1599 G01
–20
–30
–40
0.2 0.4 0.8
20
30
40
USING AN LT1468
C
FEEDBACK
= 30pF
V
REF
= 10V
1.5nV-s TYPICAL
FREQUENCY (Hz)
–90
SIGNAL/(NOISE + DISTORTION) (dB)
–70
–50
–40
10 1k 10k 100k
1599 G03
–110
100
–60
–80
–100
V
CC
= 5V USING AN LT1468
C
FEEDBACK
= 30pF
R
L
= 600Ω
REFERENCE = 6V
RMS
500kHz FILTER
80kHz FILTER
30kHz FILTER
LD PULSE
5V/DIV
GATED
SETTLING
WAVEFORM
500µV/DIV
500ns/DIV
1599 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
1599 G04
–110
100
–60
–80
–100
V
CC
= 5V USING TWO LT1468s
C
FEEDBACK
= 15pF
R
L
= 600Ω
REFERENCE = 6V
RMS
500kHz FILTER
80kHz FILTER
30kHz
FILTER
FREQUENCY (Hz)
–90
SIGNAL/(NOISE + DISTORTION) (dB)
–70
–50
–40
10 1k 10k 100k
1599 G05
–110
100
–60
–80
–100
V
CC
= 5V USING TWO LT1468s
C
FEEDBACK
= 15pF
R
L
= 600Ω
REFERENCE = 6V
RMS
500kHz FILTER
80kHz FILTER
30kHz FILTER
INTPUT VOLTAGE (V)
0
SUPPLY CURRENT (mA)
3
4
5
4
1599 G06
2
1
0
1
2
3
5
V
CC
= 5V
ALL DIGITAL INPUTS
TIED TOGETHER
Bipolar Multiplying Mode
Signal-to-(Noise + Distortion)
vs Frequency, Code = All Ones Supply Current vs Input Voltage
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
1599 G07
576
2.5
Integral Nonlinearity (INL)
DIGITAL INPUT CODE
0
–1.0
INTEGRAL NONLINEARITY (LSB)
–0.8
–0.4
–0.2
0
1.0
0.4
16384
32768
1599 G08
–0.6
0.6
0.8
0.2
49152
65535
Differential Nonlinearity (DNL)
DIGITAL INPUT CODE
0
–1.0
DIFFERENTIAL NONLINEARITY (LSB)
–0.8
–0.4
–0.2
0
1.0
0.4
16384
32768
1598 G09
–0.6
0.6
0.8
0.2
49152
65535
