LTC5587
TYPICAL PERFORMANCE CHARACTERISTICS VCC = VDD = OVDD = 3.3V, VREF = 1.8V, EN = 3.3V,
fSMPL = fSMPL(MAX) and fSCK = fSCK(MAX) unless otherwise noted. VOUT = ADC Output (LSB) • 1.8/4096. Test circuit is shown in Figure 1.
Output Voltage vs Frequency
Linearity Error vs Frequency
RF Input Return Loss vs Frequency
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3
2
0
T
A
= 25°C
T
= 25°C
T = 25°C
A
A
10MHz
–5
450MHz
880MHz
2.14GHz
2.6GHz
3.5GHz
5.8GHz
1
0
–10
–15
–20
10MHz
450MHz
880MHz
2.14GHz
2.6GHz
3.5GHz
5.8GHz
–1
L1= 3.3nH, C1=1.8pF
L1= 1.5nH, C1=1.8pF
L1= 0, C1=1.5pF
L1= 0, C1= 0.7pF
L1= 0, C1= 0
–2
–3
–25
–30
–40
–30 –25 –20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
10
–35
–40
–30 –25 –20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
10
0
1
2
3
4
5
6
–35
FREQUENCY (GHz)
5587 G02
5587 G01
5587 G03
Output Voltage and Linearity
Error at 450MHz
Output Voltage Temperature
Linearity Error vs RF Input Power
450MHz Modulated Waveforms
Variation from 25°C at 450MHz
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2.5
3
3
2
T
= 25°C
25°C
A
2.0
85°C
CW
TETRA
CDMA 4C
2
1
–40°C
1.5
1.0
85°C
1
0
0.5
0
0
–40°C
–0.5
–1.0
–1.5
–2.0
–2.5
–1
–1
–2
–3
–2
–3
–40
–30 –25 –20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
10
–30 –25 –20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
10
–40
–30 –25 –20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
10
–35
–35
–35
5587 G05
5587 G06
5587 G04
Output Voltage and Linearity
Error at 880MHz
Output Voltage Temperature
Linearity Error vs RF Input Power
880MHz Modulated Waveforms
Variation from 25°C at 880MHz
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2.5
3
2
3
2
T
= 25°C
25°C
A
2.0
85°C
CW
EDGE
–40°C
1.5
1.0
85°C
1
0
1
0
0.5
0
–40°C
–0.5
–1.0
–1.5
–2.0
–2.5
–1
–1
–2
–3
–2
–3
–40
–30 –25 –20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
10
–40
–30 –25 –20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
10
–30 –25 –20 –15 –10 –5
RF INPUT POWER (dBm)
0
5
10
–35
–35
–35
5587 G07
5587 G08
5587 G09
5587f
6