May 1997
ML2111*
Universal Dual High Frequency Filter
GENERAL DESCRIPTION
The ML2111 consists of two independent switched
capacitor filters that operate at up to 150kHz and perform
second order filter functions such as lowpass, bandpass,
highpass, notch and allpass. All filter configurations,
including Butterworth, Bessel, Cauer, and Chebyshev can
be formed.
The center frequency of these filters is tuned by an
external clock or the external clock and resistor ratio.
The ML2111 frequency range is specified up to 150kHz
with ±5.0V ±10% power supplies. Using a single 5.0V
±10% power supply the frequency range is up to 100kHz.
These filters are ideal where center frequency accuracy
and high Qs are needed.
The ML2111 is a pin compatible superior replacement for
MF10, LMF100, and LTC1060 filters.
FEATURES
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Specified for operation up to 150kHz
Center frequency x Q product
£
5MHz
Separate highpass, notch, allpass, bandpass, and
lowpass outputs
Center frequency accuracy of ±0.4% or ±0.8% max.
Q accuracy of ±4% or ±8% max.
Clock inputs are TTL or CMOS compatible
Single 5V (±2.25V) or ±5V supply operation
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* Some Packages Are End Of Life and Obsolete
BLOCK DIAGRAM
7
VA+
INVA
4
-
+
8
VD+
N/AP/HPA
3
-
+
5
S1A
2
BPA
1
LPA
Σ
-
S2A
∫
∫
AGND
15
CLKA
10
50/100HOLD
12
LEVEL SHIFT
9
CLKB
11
LEVEL
SHIFT
NON-OVERLAP
CLOCK
CONTROL
LEVEL
SHIFT
NON-OVERLAP
CLOCK
SA/B
6
-
INVB
17
VA-
14
VD-
13
-
+
S2B
+
Σ
-
S1B
16
∫
BPB
19
∫
LPB
20
N/AP/HPB
18
1
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
