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LTC6910-1CTS8#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
LTC6910-1
LTC6910-2/LTC6910-3
22
6910123fa
+
–
+
–
8
7
6
5
V
–
V
OUT
R4 15.8k
V
–
V
+
V
+
LT1884
C2
1µF
C1
10µF
R1
15.8k
2
7
8
3
V
IN
6
4
5
1
R2
15.8k
0.1µF
GN2 GN1 GN0
0 0 1 GAIN = 1
0 1 0 GAIN = 2
0 1 1 GAIN = 5
1 0 0 GAIN = 10
1 0 1 GAIN = 20
1 1 0 GAIN = 50
1 1 1 GAIN = 100
BW2BW1BW0
BANDWIDTH 1Hz TO 10Hz 0 0 1
BANDWIDTH 1Hz TO 20Hz 0 1 0
BANDWIDTH 1Hz TO 50Hz 0 1 1
BANDWIDTH 1Hz TO 100Hz 1 0 0
BANDWIDTH 1Hz TO 200Hz 1 0 1
BANDWIDTH 1Hz TO 500Hz 1 1 0
BANDWIDTH 1Hz TO 1000Hz 1 1 1
0.1µF 0.1µF
V
+
V
–
1
2
3
4
2
7
8
3
6
4
5
1
0.1µF
0.1µF 0.1µF
V
+
V
–
LTC6910-1
LTC6910-1
R3
15.8k
BANDWIDTH
CONTROL
GAIN
CONTROL
FREQUENCY (Hz)
–60
GAIN (dB)
–50
–30
–20
0
10
1 100 1k 100k
6910 F06b
–70
10
10k
–10
–40
–80
GN2 GN1 GN0 = 001
BW2
1
BW1
0
BW0
0
BW2
0
BW1
0
BW0
1
BW2
1
BW1
1
BW0
1
Gain vs Frequency
Figure 8. Low Noise AC Amplifier with Programmable Gain and Bandwidth
TYPICAL APPLICATIO S
U
Measured frequency responses in Figure 8 with
LTC6910-1 PGAs demonstrate bandwidth settings of 10Hz,
100Hz and 1kHz, with digital codes at the BW inputs of
respectively 001, 100 and 111, and unity gain in each case.
By scaling C2, this circuit can serve other bandwidths,
such as a maximum of 10kHz with 0.1µF using LT1884
(gain-bandwidth product around 1MHz). Noise floor from
internal sources yields an output SNR of 76dB with 10mV
P-
P
input, gain of 100 and 100Hz bandwidth; for 100mV
P-P
input, gain of 10 and 1000Hz bandwidth it is 64dB.
LTC6910-1
LTC6910-2/LTC6910-3
23
6910123fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
PACKAGE DESCRIPTIO
1.50 – 1.75
(NOTE 4)
2.80 BSC
0.22 – 0.36
8 PLCS (NOTE 3)
DATUM ‘A’
0.09 – 0.20
(NOTE 3)
TS8 TSOT-23 0802
2.90 BSC
(NOTE 4)
0.65 BSC
1.95 BSC
0.80 – 0.90
1.00 MAX
0.01 – 0.10
0.20 BSC
0.30 – 0.50 REF
PIN ONE ID
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
3.85 MAX
0.52
MAX
0.65
REF
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
1.4 MIN
2.62 REF
1.22 REF
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
TS8 Package
8-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1637)
LTC6910-1
LTC6910-2/LTC6910-3
24
6910123fa
PART NUMBER DESCRIPTION COMMENTS
LT
®
1228 100MHz Gain Controlled Transconductance Amplifier Differential Input, Continuous Analog Gain Control
LT1251/LT1256 40MHz Video Fader and Gain Controlled Amplifier Two Input, One Output, Continuous Analog Gain Control
LTC1564 10kHz to 150kHz Digitally Controlled Filter and PGA Continuous Time, Low Noise 8th Order Filter and 4-Bit PGA
LTC6911 Dual Matched Programmable Gain Amplifier Dual 6910 in a 10 Lead MSOP
LTC6915 Zero Drift Instrumentation Amplifier with Programmable Gain Zero Drift, Digitally Programmable Gain Up to 4096 V/V
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2002
LT/TP 0404 1K REV A • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATIO
U
2
13
V
IN
V
OUT
= GAIN • V
IN
AGND
1µF OR LARGER
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
C1 VALUE SETS LOWER CORNER FREQUENCY.
THE TABLE SHOWS THIS FREQUENCY WITH
C1 = 1µF. THIS FREQUENCY SCALES INVERSELY
WITH C1
6910 TA02
5
4
LTC6910-X
6
8
V
+
2.7V TO 10.5V
0.1µF
G2 G1 G0
7
C1
0
–1
–2
–5
–10
–20
–50
–100
0
–1
–2
–4
–8
–16
–32
–64
LTC6910-1 LTC6910-2 LTC6910-3
0
–1
–2
–3
–4
–5
–6
–7
PASSBAND
GAIN
PASSBAND
GAIN
PASSBAND
GAIN
LOWER –3dB
FREQ (C1 = 1µF)
LOWER –3dB
FREQ (C1 = 1µF)
LOWER –3dB
FREQ (C1 = 1µF)
—
16Hz
32Hz
80Hz
160Hz
160Hz
160Hz
160Hz
—
16Hz
32Hz
64Hz
127Hz
127Hz
127Hz
127Hz
—
16Hz
32Hz
48Hz
64Hz
80Hz
95Hz
111Hz
DIGITAL INPUTS
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
G2 G1 G0
AC-Coupled Single Supply Amplifiers
Frequency Response, LTC6910-1
FREQUENCY (Hz)
100
–10
GAIN (dB)
0
10
20
30
40
50
1k 10k 100k 1M
6910 TA03
G2, G1, G0 = 111
G2, G1, G0 = 110
G2, G1, G0 = 101
G2, G1, G0 = 100
G2, G1, G0 = 011
G2, G1, G0 = 010
G2, G1, G0 = 001
V
S
= 10V, V
IN
= 5mV
RMS
C1 = 1µF
Frequency Response, LTC6910-2
FREQUENCY (Hz)
100
–10
GAIN (dB)
0
10
20
30
40
1k 10k 100k 1M
6910 TA04
V
S
= 10V, V
IN
= 5mV
RMS
C1 = 1µF
G2, G1, G0 = 111
G2, G1, G0 = 110
G2, G1, G0 = 101
G2, G1, G0 = 100
G2, G1, G0 = 011
G2, G1, G0 = 010
G2, G1, G0 = 001
Frequency Response, LTC6910-3
FREQUENCY (Hz)
10 100
–10
GAIN (dB)
–5
0
5
10
15
20
1k 10k 100k 10M1M
6910 TA05
G2, G1, G0 = 111
G2, G1, G0 = 110
G2, G1, G0 = 101
G2, G1, G0 = 100
G2, G1, G0 = 011
G2, G1, G0 = 010
G2, G1, G0 = 001
V
S
= 10V
V
IN
= 10mV
RMS
C1 = 1µF
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

LTC6910-1CTS8#TRPBF

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Manufacturer:
Analog Devices Inc.
Description:
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