LMF100_15 Datasheet, PDF (7/40 Pages) Texas Instruments – LMF100 Dual High-Performance Switched Capacitor Filters

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LMF100
SNOSBG9B – JULY 1999 – REVISED JUNE 2015
Electrical Characteristics for V⁺ = +2.5 V and V^− = −2.5 V (continued)
The following specifications apply for Mode 1, Q = 10 (R₁ = R₃ = 100 k, R₂ = 10 k), V⁺ = +2.50 V and V^− = −2.50 V unless
otherwise specified. All limits are T_A = T_J = 25°C unless otherwise specified.
PARAMETER
TEST CONDITIONS
LMF100CCN
MIN
TYP
MAX
LMF100CIWM
MIN
TYP
MAX
UNIT
f_CLK Clock frequency
5
15000
00
5
1500000 Hz
±0.2%
±0.2%
f_CLK/f Clock to center frequency ratio
0
deviation
V_Pin12 = 5 V or 0
V, f_CLK = 1 MHz
Tested
Limit⁽¹⁾
Design
Limit⁽²⁾
T_MIN to T_MAX
±1%
±1%
±1%
DQ
Q Error (MAX) ⁽³⁾
Q
Q = 10, Mode 1,
V_Pin12 = 5 V or 0
V,
f_CLK = 1 MHz
Tested
Limit⁽¹⁾
Design
Limit⁽²⁾
T_MIN to T_MAX
T_MIN to T_MAX
±0.5%
±5%
±8%
±0.5%
±8%
0
0
H_OBP Bandpass gain at f₀
f_CLK = 1 MHz
Tested
Limit⁽¹⁾
Design
Limit⁽²⁾
T_MIN to T_MAX
T_MIN to T_MAX
±0.4
±0.5 ^dB
±0.5
0
0
H_OLP DC Lowpass gain
R₁ = R₂ = 10 k,
f_CLK = 250 kHz
Tested
Limit⁽¹⁾
Design
Limit⁽²⁾
T_MIN to T_MAX
T_MIN to T_MAX
±0.2
±0.2 ^dB
±0.2
±5
±5
V_OS1 DC Offset voltage⁽⁴⁾
f_CLK = 250 kHz
Tested
Limit⁽¹⁾
Design
Limit⁽²⁾
T_MIN to T_MAX
T_MIN to T_MAX
±15
±15
mV
±15
±20
±20
V_OS2 DC Offset voltage⁽⁴⁾
S_A/B = V⁺ Tested Limit⁽¹⁾ _{TMIN to TMAX}
f_CLK = 250 kHz
Design Limit⁽²⁾ T_MIN to T_MAX
±10
±60
±60
±10
mV
±60
mV
S_A/B = V^–
Tested Limit⁽¹⁾
Design Limit⁽²⁾
T_MIN to T_MAX
T_MIN to T_MAX
±50
±60
±10
±60
±10
V_OS3 DC Offset voltage⁽⁴⁾
f_CLK = 250 kHz
Tested
Limit⁽¹⁾
Design
Limit⁽²⁾
T_MIN to T_MAX
T_MIN to T_MAX
±25
±30 ^mV
±30
Crosstalk ⁽⁵⁾
A Side to B Side or B Side to A Side
–65
–65
dB
Output noise⁽⁶⁾
f_CLK = 250 kHz
N
20 kHz Bandwidth BP
25
25
250
250
µV
100:1 Mode
LP
220
220
Clock feedthrough⁽⁷⁾
f_CLK = 250 kHz 100:1 Mode
2
2
mV
(3) The accuracy of the Q value is a function of the center frequency (f₀). This is illustrated in the curves under the heading Typical
Characteristics.
(4) V_os1, V_os2, and V_os3 refer to the internal offsets as discussed in the Application Information.
(5) Crosstalk between the internal filter sections is measured by applying a 1 V_RMS 10-kHz signal to one bandpass filter section input and
grounding the input of the other bandpass filter section. The crosstalk is the ratio between the output of the grounded filter section and
the 1 V_RMS input signal of the other section.
(6) In 50:1 mode the output noise is 3 dB higher.
(7) In 50:1 mode the clock feed through is 6 dB higher.
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