LTC6910-1 Datasheet, PDF (24/24 Pages) Linear Technology – Digitally Controlled Programmable Gain Amplifiers in SOT-23

LTC6910-1
LTC6910-2/LTC6910-3
TYPICAL APPLICATIO
AC-Coupled Single Supply Amplifiers
DIGITAL INPUTS
G2 G1 G0
000
001
010
011
100
101
110
111
LTC6910-1
PASSBAND LOWER –3dB
GAIN FREQ (C1 = 1µF)
0
–1
–2
–5
–10
–20
–50
–100
—
16Hz
32Hz
80Hz
160Hz
160Hz
160Hz
160Hz
LTC6910-2
PASSBAND LOWER –3dB
GAIN FREQ (C1 = 1µF)
0
—
–1
16Hz
–2
32Hz
–4
64Hz
–8
127Hz
–16
127Hz
–32
127Hz
–64
127Hz
LTC6910-3
PASSBAND LOWER –3dB
GAIN FREQ (C1 = 1µF)
0
—
–1
16Hz
–2
32Hz
–3
48Hz
–4
64Hz
–5
80Hz
–6
95Hz
–7
111Hz
V⁺
2.7V TO 10.5V
0.1µF
8
C1
4
3
1
V_IN
LTC6910-X
V_OUT = GAIN • V_IN
2
5
6
AGND
7
1µF OR LARGER
G2 G1 G0
6910 TA02
C1 VALUE SETS LOWER CORNER FREQUENCY.
THE TABLE SHOWS THIS FREQUENCY WITH
C1 = 1µF. THIS FREQUENCY SCALES INVERSELY
WITH C1
PIN 2 (AGND) SETS DC OUTPUT VOLTAGE AND HAS
BUILT-IN HALF-SUPPLY REFERENCE WITH INTERNAL
RESISTANCE OF 5k. AGND CAN ALSO BE DRIVEN BY A
SYSTEM ANALOG GROUND REFERENCE NEAR HALF SUPPLY
Frequency Response, LTC6910-1
50
G2, G1, G0 = 111
40
G2, G1, G0 = 110
30
G2, G1, G0 = 101
G2, G1, G0 = 100
20
G2, G1, G0 = 011
10
G2, G1, G0 = 010
G2, G1, G0 = 001
0
V_S = 10V, V_IN = 5mV_RMS
C1 = 1µF
–10
100
1k
10k
100k
1M
FREQUENCY (Hz)
6910 TA03
Frequency Response, LTC6910-2
40
G2, G1, G0 = 111
G2, G1, G0 = 110
30
G2, G1, G0 = 101
20
G2, G1, G0 = 100
G2, G1, G0 = 011
10
G2, G1, G0 = 010
G2, G1, G0 = 001
0
V_S = 10V, V_IN = 5mV_RMS
C1 = 1µF
–10
100
1k
10k
100k
1M
FREQUENCY (Hz)
6910 TA04
Frequency Response, LTC6910-3
20
G2, G1, G0 = 111 ^{G2, G1, G0 = 110}
15
G2, G1, G0 = 101
10
G2, G1, G0 = 100
G2, G1, G0 = 011
5
G2, G1, G0 = 010
0
G2, G1, G0 = 001
–5 V_S = 10V
V_IN = 10mV_RMS
C1 = 1µF
–10
10 100 1k
10k 100k
FREQUENCY (Hz)
1M 10M
6910 TA05
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PART NUMBER
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DESCRIPTION
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COMMENTS
Differential Input, Continuous Analog Gain Control
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10kHz to 150kHz Digitally Controlled Filter and PGA
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Zero Drift Instrumentation Amplifier with Programmable Gain Zero Drift, Digitally Programmable Gain Up to 4096 V/V
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
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6910123fa
LT/TP 0404 1K REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2002