LT6237 Driver Datasheet

LT6237 Datasheet, PDF, Equivalent


Part Number

LT6237

Description

Op Amp/SAR ADC Driver

Manufacture

Linear

Total Page 26 Pages
Datasheet
Download LT6237 Datasheet


LT6237
Features
n Low Noise: 1.1nV/√Hz
n Low Supply Current: 3.5mA/Amp Max
n Low Offset Voltage: 350µV Max
n Fast Settling Time: 570ns to 18-Bit, 2VP-P Output
n Low Distortion: THD = –116.8dB at 2kHz
n Wide Supply Range: 3V to 12.6V
n Output Swings Rail-to-Rail
n 215MHz Gain-Bandwidth Product
n Specified Temperature Range: –40°C to 125°C
n LT6236 Shutdown to 10µA Max
n LT6236 in Low Profile (1mm) ThinSOT™ Package
n Dual LT6237 in 3mm × 3mm 8-Lead DFN and 8-Lead
MSOP Packages
n LT6238 in 16-Lead SSOP Package
Applications
n 16-Bit and 18-Bit SAR ADC Drivers
n Active Filters
n Low Noise, Low Power Signal Processing
LT6236/LT6237/LT6238
Rail-to-Rail Output
215MHz, 1.1nV/Hz
Op Amp/SAR ADC Driver
Description
The LT®6236/LT6237/LT6238 are single/dual/quad low
noise, rail-to-rail output op amps that feature 1.1nV/√Hz
input referred noise voltage density and draw only 3.5mA
of supply current per amplifier. These amplifiers combine
very low noise and supply current with a 215MHz gain
bandwidth product and a 70V/µs slew rate. Low noise, fast
settling time and low offset voltage make this amplifier
optimal to drive low noise, high speed SAR ADCs. The
LT6236 includes a shutdown feature that can be used to
reduce the supply current to less than 10µA.
This amplifier family has an output that swings within
50mV of either supply rail to maximize the signal dynamic
range in low supply applications and is specified on 3.3V,
5V and ±5V supplies.
The LT6236/LT6237/LT6238 are upgrades to the LT6230/
LT6231/LT6232, offering similar performance with reduced
wideband noise beyond 100kHz.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Typical Application
Differentially Driving a SAR ADC
VS+= 6V
IN+ +
1/2 LT6237
1/2 LT6237
IN+
VS–= –2V
LOWPASS FILTERS
38.3Ω
49.9Ω
270pF
38.3Ω
270pF
49.9Ω
IN+
LTC2389-18
IN
18-BIT
2.5Msps
623637 TA01a
LT6237 Driving
–1dBFS,
LTC2389-18
32768-Point
fFINFT=
2kHz,
0
–10
–20
–30
–40
–50
VHODU2T==–71.239V.P5-dPBc
HD3 = –118.7dBc
SFDR = 117.7dB
THD = –116.8dB
SNR = 99.7dB
–60 SINAD = 98.9dB
–70
–80
–90
–100
–110
–120
–130
–140
–150
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
FREQUENCY (MHz)
62367 TA01b
For more information www.linear.com/LT6236
623637fb
1

LT6237
LT6236/LT6237/LT6238
Absolute Maximum Ratings
(Note 1)
Total Supply Voltage (V+ to V)............................... 12.6V
Input Current (Note 2).......................................... ±40mA
Output Short-Circuit Duration (Note 3)............. Indefinite
Operating Temperature Range (Note 4).. –40°C to 125°C
Specified Temperature Range (Note 5).....–40°C to125°C
Maximum Junction Temperature........................... 150°C
Storage Temperature Range................... –65°C to 150°C
Pin Configuration
OUT 1
V2
+IN 3
TOP VIEW
6 V+
5 ENABLE
4 –IN
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
TJMAX = 150°C, θJA = 192°C/W
TOP VIEW
OUT A 1
8 V+
–IN A 2
+IN A 3
9
7 OUT B
6 –IN B
V4
5 +IN B
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 43°C/W
UNDERSIDE METAL CONNECTED TO
V
(PCB CONNECTION OPTIONAL)
OUT A 1
–IN A 2
+IN A 3
V4
TOP VIEW
8 V+
7 OUT B
6 –IN B
5 +IN B
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 273°C/W
TOP VIEW
OUT A 1
–IN A 2
+IN A 3 +A
V+ 4
+IN B
–IN B
5
6
+–B
OUT B 7
NC 8
16 OUT D
15 –IN D
D
14 +IN D
13 V
C+–
12
11
+IN C
–IN C
10 OUT C
9 NC
GN PACKAGE
16-LEAD NARROW PLASTIC SSOP
TJMAX = 150°C, θJA = 110°C/W
Order Information
LEAD FREE FINISH
LT6236CS6#TRMPBF
TAPE AND REEL
LT6236CS6#TRPBF
PART MARKING*
LTGHM
PACKAGE DESCRIPTION
6-Lead Plastic TSOT-23
LT6236IS6#TRMPBF
LT6236IS6#TRPBF
LTGHM
6-Lead Plastic TSOT-23
LT6236HS6#TRMPBF
LT6236HS6#TRPBF
LTGHM
6-Lead Plastic TSOT-23
LT6237CDD#PBF
LT6237CDD#TRPBF
LGHN
8-Lead (3mm × 3mm) Plastic DFN
LT6237IDD#PBF
LT6237IDD#TRPBF
LGHN
8-Lead (3mm × 3mm) Plastic DFN
LT6237HDD#PBF
LT6237HDD#TRPBF
LGHN
8-Lead (3mm × 3mm) Plastic DFN
LT6237CMS8#PBF
LT6237CMS8#TRPBF LTGHP
8-Lead Plastic MSOP
LT6237IMS8#PBF
LT6237IMS8#TRPBF
LTGHP
8-Lead Plastic MSOP
LT6237HMS8#PBF
LT6237HMS8#TRPBF LTGHP
8-Lead Plastic MSOP
LT6238CGN#PBF
LT6238CGN#TRPBF
6238
16-Lead Narrow Plastic SSOP
LT6238IGN#PBF
LT6238IGN#TRPBF
6238
16-Lead Narrow Plastic SSOP
LT6238HGN#PBF
LT6238HGN#TRPBF
6238
16-Lead Narrow Plastic SSOP
TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
2 For more information www.linear.com/LT6236
SPECIFIED
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
623637fb


Features Features n Low Noise: 1.1nV/√Hz n Lo w Supply Current: 3.5mA/Amp Max n Low Offset Voltage: 350µV Max n Fast Sett ling Time: 570ns to 18-Bit, 2VP-P Outpu t n Low Distortion: THD = –116.8dB a t 2kHz n Wide Supply Range: 3V to 12.6 V n Output Swings Rail-to-Rail n 215M Hz Gain-Bandwidth Product n Specified Temperature Range: –40°C to 125°C n LT6236 Shutdown to 10µA Max n LT623 6 in Low Profile (1mm) ThinSOT™ Packa ge n Dual LT6237 in 3mm × 3mm 8-Lead DFN and 8-Lead MSOP Packages n LT6238 in 16-Lead SSOP Package Applications n 16-Bit and 18-Bit SAR ADC Drivers n Ac tive Filters n Low Noise, Low Power Si gnal Processing LT6236/LT6237/LT6238 R ail-to-Rail Output 215MHz, 1.1nV/√Hz Op Amp/SAR ADC Driver Description The L T®6236/LT6237/LT6238 are single/dual/q uad low noise, rail-to-rail output op a mps that feature 1.1nV/√Hz input refe rred noise voltage density and draw onl y 3.5mA of supply current per amplifier . These amplifiers combine very low noise and supply current wi.
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