Document
Features
n Gain Bandwidth Product: 6.5MHz n –3dB Bandwidth (AV = +1): 4.5MHz n Low Quiescent Current: 65µA n C-Load™ Op Amp Drives all Capacitive Loads n Offset Voltage: 350µV Maximum n Rail-to-Rail Input and Output n Supply Voltage Range: 1.8V to 5.25V n Input Bias Current: 50nA Maximum n CMRR/PSRR: 100dB/100dB n Shutdown Current: 7µA Maximum n Operating Temperature Range: –40°C to 125°C n Single in 6-Lead TSOT-23, 2mm × 2mm DFN Packages n Dual in 8-Lead MS8, MS10, TS0T-23, 2mm × 2mm
DFN, 2mm × 2mm Thin DFN Packages n Quad in MS16 Package
Applications
n Micropower Active Filters n Portable Instrumentation n Battery or Solar Powered Systems n Automotive Electronics
LTC6255/LTC6256/LTC6257 6.5MHz, 65µA Power
Efficient Rail-to-Rail I/O Op Amps
Description
The LTC®6255/LTC6256/LTC6257 are single/dual/quad operational amplifiers with low noise, low power, low supply voltage, and rail-to-rail inputs and outputs. They are unity gain stable with or without capacitive loads. They feature 6.5MHz gain-bandwidth product, 1.8V/µs slew rate while consuming only 65µA of supply current per amplifier operating on supply voltages ranging from 1.8V to 5.25V. The combination of low supply current, low supply voltage, high gain bandwidth product and low noise makes the LTC6255 family unique among rail-to-rail input/output op amps with similar supply current. These operational amplifiers are ideal for low power and low noise applications.
For applications that require power-down, the LTC6255 and LTC6256 in S6 and MS10 packages offer shutdown which reduces the current consumption to 7µA maximum.
The LTC6255 family can be used as plug-in replacements for many commercially available op amps to reduce power and improve input/output range and performance.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Over-The-Top and C-Load are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
Low Power, Low Distortion ADC Driver
VIN 5mV TO 2V
10k 1%
3.3V
+
–LTC6255
324Ω 1% 470pF NPO
6.34k, 1%
3.3V
VDD VREF CS
AIN
LTC2361
SDO SCK
GND OVDD
625567 TA01a
22pF ISUPPLY = 540µA TOTAL AT 125kSps
MAGNITUDE (dB)
LTC6255 Driving LTC2361 ADC
0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110
0
VIN = –1dBFS, 5kHz fS = 125kSps SNR = 72.5dB SFDR = 89dB tACQ = 5µs tCONV = 3µs
10 20 30 40 50 60 FREQUENCY (kHz)
625567 TA01b
For more information www.linear.com/LTC6255
625567fd
1
LTC6255/LTC6256/LTC6257
Absolute Maximum Ratings
(Note 1)
Supply Voltage: V+ – V–............................................5.5V Input Voltage ................................... V– – 0.2 to V+ + 0.2 Input Current: +IN, –IN, SHDN (Note 2)...............±10mA Output Current: OUT............................................ ±20mA Output Short-Circuit Duration (Note 3)............ Indefinite Operating Temperature Range (Note 4)
LTC6255C/LTC6256C/LTC6257C.........–40°C to 85°C LTC6255I/LTC6256I/LTC6257I............–40°C to 85°C LTC6255H/LTC6256H/LTC6257H......–40°C to 125°C
Specified Temperature Range (Note 5) LTC6255C/LTC6256C/LTC6257C............. 0°C to 70°C LTC6255I/LTC6256I/LTC6257I............–40°C to 85°C LTC6255H/LTC6256H/LTC6257H......–40°C to 125°C
Maximum Junction Temperature.......................... 150°C Storage Temperature Range...................–65°C to 150°C Lead Temperature (Soldering, 10 sec) S6, TS8, MS8, MS only.........................................300°C
Pin Configuration
TOP VIEW
OUTA 1
–INA 2 –
+
+INA 3 V– 4
9 V–
8 V+ 7 OUTB 6 –INB 5 +INB
+ –
+ –
+ –
KC PACKAGE
8-LEAD (2mm × 2mm × 0.6mm) PLASTIC UTDFN
EXPOSED
TJMAX = 125°C, PAD (PIN 9) IS
VqJ–A,
= 89°C/W (NOTE 6) MUST BE SOLDERED
TO
PCB
OUTA 1 –INA 2 +INA 3
V– 4
TOP VIEW
– +
8 V+ 7 OUTB 6 –INB 5 +INB
TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 TJMAX = 150°C, qJA = 195°C/W (NOTE 6)
OUTA 1
–INA 2
+INVA–
3 4
SHDNA 5
TOP VIEW
– +
10 V+ 9 OUTB 8 –INB 7 +INB 6 SHDNB
MS PACKAGE 10-LEAD PLASTIC MSOP TJMAX = 150°C, qJA = 160°C/W (NOTE 6)
TOP VIEW
OUTA 1
8 V+
–INA 2 +INA 3
V9–
7 OUTB 6 –INB
V– 4
5 +INB
DC PACKAGE 8-LEAD (2mm × 2mm × 0.8mm) PLASTIC DFN
EXPOSEDTPJMAADX(=PI1N259°)CIS, qVJ–A,
= 102°C/W (NOTE 6) MUST BE SOLDERED
TO
PCB
OUT 1 V– 2
+IN 3
+ –
TOP VIEW
6 V+ 5 SHDN 4 –IN
S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 150°C, qJA = 192°C/W (NOTE 6)
+ –
+ –
OUTA 1 –INA 2 +INA 3
V– 4
TOP VIEW
– +
8 V+ 7 OUTB 6 –INB 5 +INB
MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, qJA = 163°C/W (NOTE 6)
TOP VIEW
OUTA 1
–INA 2
+INVA+
3 4
+INB 5
–INB 6
OUTB 7
NC 8
– +
+ –
16 OUTD
15 –IND
14 13
+VI–ND
+ 12 +INC
– 11 –INC
10 OUTC
9 NC
MS PACKAGE 16-LEAD PLASTIC MSOP TJMAX = 150°C, qJA = 125°C/W (NOTE 6)
TOP VIEW
V+ 1
6 OUT
+IN 2 V– 3
V7–
5 –I.