7
TH7301 Dual-Channel Programmable Low-Pass Filter
Operating
Characteristics
(continued)
Test levels (DC and AC Characteristics)
level 1: production tested at 25° C and over full power supply range
level 2: production tested at 25° C and VEE = -5.0 V
level 3: guaranteed by design and characterization test over full temperature and power supply range
level 4: typical value only, not confirmed by test
level 5: guaranteed by design and characterization at 25 °C and VEE = -5.0 V
Parameter
Symbol
Test level
Min.
Typ.
Max.
Unit
Conditions
Passband
Group Delay Ripple
t
pass
3
6
12
ns
10 Hz
≤ f ≤ 0.5f
c
see note 2, 3 and figure 8
Initial Gain Accuracy
A
vacc
2
-2.5
3.0
dB
see note 4 and figures 9
and 10
Gain Step Accuracy
(monotonicity guaranteed)
A
vmon
3
- 1.0
1.0
dB
Output
Signal-to-Noise Ratio
SNR
3
37
38
dB
see note 5
Crosstalk between
Channels
Xtalk
3
40
50
dB
see note 6, 7
Gain Match between
Channels
A
vmatch
2
- 0.8
0.8
dB
Bandwidth Match between
Channels
f
cmatch
2
-10
-5
10
5
%
%
f
cset ≤ 6.375 MHz
f
cset ≥ 6.4 MHz
Passband Group Delay
Match between Channels
t
passm
3
-3
+3
ns
10 Hz
≤ f ≤ 0.5f
c
Total Harmonic Distortion
THD
5
1.0
2.5
%
see note 8
Power Supply Rejection
PSR
4
40
dB
see note 9
Intermodulation Distortion
IMD
3
- 48
- 37
dBc
see note 10
Output Voltage
V
o
3
1.0
VPP
see note 11
Input Resistance
R
in
4
3.0
k
Ω
Input Capacitance
C
in
4
12
pF
Load Resistance
R
ld
41
k
Ω
see note 12
Load Capacitance
C
ld
4
15
pF
Notes
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Logic threshold levels for inputs SCLK, SDATA and SDEN. Note that this is a negative-supply device
(VEE,VSS = -5 V, VCC, VDD = 0 V). It can be also used for positive-supply systems if the input
signals are referred to VCC, VDD = +5 V and VEE,VSS = 0 V.
f
cset = 10 MHz, Av = 10 dB
passband group delay ripple for an ideal 4 pole Butterworth under the same conditions is 6ns
measured at 0.25fc
V
o = 1 VPP, measured within the filter's noise bandwidth, fcset = 10 MHz, Av = 10 dB, fin < fc
V
o = 1 VPP, for XtalkIQ I driven Q measured, XtalkQI Q driven I measured, fcset = 22.4 MHz,
A
v = 20.5 dB,
f
in = 5 MHz
f
in = 0.25fc; Vo = 1 VPP; Cld = 15 pF, Av = 10 dB
100mVPP from 10 Hz to 1 MHz on VEE,VSS referred to the output.
f
cset = 10 MHz, Av = 10 dB; tones at f1= 15 MHz and f2 = 25 MHz with 300 mVPP each
R
ld = 1 kΩ, for linear gain and not to exceed Xtalk, THD and IMD
AC coupled or DC coupled to VEE, VSS
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