LT6232 Linear Technology, LT6232 Datasheet

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LT6232

Manufacturer Part Number
LT6232
Description
(LT6230 - LT6232) Op Amp Family
Manufacturer
Linear Technology
Datasheet

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APPLICATIO S
FEATURES
TYPICAL APPLICATIO
, LTC and LT are registered trademarks of Linear Technology Corporation.
Low Noise Voltage: 1.1nV/ Hz
Low Supply Current: 3.5mA/Amp Max
Low Offset Voltage: 350 V Max
Gain Bandwidth Product:
LT6230: 215MHz; A
LT6230-10: 1450MHz; A
Wide Supply Range: 3V to 12.6V
Output Swings Rail-to-Rail
Common Mode Rejection Ratio 115dB Typ
Output Current: 30mA
Operating Temperature Range – 40 C to 85 C
LT6230 Shutdown to 10 A Maximum
LT6230/LT6230-10 in SOT-23 Package
Dual LT6231 in 8-Pin SO and Tiny DFN Packages
LT6232 in 16-Pin SSOP Package
Ultrasound Amplifiers
Low Noise, Low Power Signal Processing
Active Filters
Driving A/D Converters
Rail-to-Rail Buffer Amplifiers
IN
IN
+
R1
10
Low Noise Low Power Instrumentation Amplifier
+
+
1/2 LT6231
1/2 LT6231
V
V
S
S
+
196
196
R2
R3
U
A
BW = 5.1MHz
V
V
S
= 40
= 1.5V to 5V
V
499
499
R4
R5
1
V
10
+
I
E
MEASUREMENT BW = 8MHz
U
LT6202
S
N
= 10mA
= 5.8 V
V
V
S
S
+
499
499
R6
R7
RMS
INPUT REFERRED,
623012 TA01a
V
OUT
1.1nV/ Hz, 3.5mA Op Amp Family
DESCRIPTIO
The LT
noise, rail-to-rail output unity gain stable op amps that
feature 1.1nV/ Hz noise voltage 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, a 70V/ s slew rate and are optimized
for low supply voltage signal conditioning systems. The
LT6230-10 is a single amplifier optimized for higher gain
applications resulting in higher gain bandwidth and slew
rate. The LT6230 and LT6230-10 include an enable pin
that can be used to reduce the supply current to less than
10 A.
The 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 e
amplifier is among the most noise efficient of any op amp.
The LT6230/LT6230-10 is available in the 6-lead SOT-23
package and the LT6231 dual is available in the 8-pin SO
package with standard pinouts. For compact layouts, the
dual is also available in a tiny dual fine pitch leadless
package (DFN). The LT6232 is available in the 16-pin
SSOP package.
215MHz, Rail-to-Rail Output,
®
6230/LT6231/LT6232 are single/dual/quad low
6
5
4
3
2
1
0
10
Noise Voltage and Unbalanced
Noise Current vs Frequency
LT6230/LT6230-10/
LT6230/LT6230-10/
U
100
FREQUENCY (Hz)
n
LT6231/LT6232
LT6231/LT6232
• I
1k
SUPPLY
NOISE CURRENT
NOISE VOLTAGE
10k
V
T
V
A
S
CM
= 25 C
= 2.5V
623012 TA01b
product of 1.9 per
= 0V
100k
sn623012 623012fas
6
5
4
3
2
1
0
1

Related parts for LT6232

LT6232 Summary of contents

Page 1

... The LT6230/LT6230-10 is available in the 6-lead SOT-23 package and the LT6231 dual is available in the 8-pin SO package with standard pinouts. For compact layouts, the dual is also available in a tiny dual fine pitch leadless package (DFN). The LT6232 is available in the 16-pin SSOP package ...

Page 2

... LT6231CDD + 8 V LT6231IDD 7 OUT B 6 –IN B – + PART MARKING* = 160 C/W JA LAEU – ORDER PART NUMBER 16 OUT D 15 –IN D LT6232CGN – +IN D LT6232IGN – + – 11 – PART 10 OUT C MARKING 9 NC 6232 6232I = 135 C/W JA sn623012 623012fas ...

Page 3

... I Short-Circuit Current SC I Supply Current per Amplifier S Disabled Supply Current per Amplifier LT6230/LT6230-10 5V, 0V 3.3V, 0V CONDITIONS LT6230S6, LT6230S6-10 LT6231S8, LT6232GN LT6231DD 0.1Hz to 10Hz f = 10kHz 10kHz 5V 10k 10kHz 5V 10k S S Common Mode Differential Mode ...

Page 4

... Turn-Off Time OFF GBW Gain Bandwidth Product SR Slew Rate FPBW Full Power Bandwidth t Settling Time (LT6230, LT6231, LT6232) S The denotes the specifications which apply over 0 C < T supply, ENABLE = 0V, unless otherwise noted. SYMBOL PARAMETER V Input Offset Voltage OS Input Offset Voltage Match ...

Page 5

... A = – 1k 1. LT6230-10 –10 1k 1. OUT P-P LT6230, LT6231, LT6232 < temperature range CONDITIONS LT6230S6, LT6230S6-10 LT6231S8, LT6232GN LT6231DD V = Half Supply 5V 0.5V to 4.5V 10k 4V, ...

Page 6

... 5V – 1k 1. LT6230-10 –10 1k 1. OUT P-P LT6230, LT6231, LT6232 CONDITIONS LT6230, LT6230-10 LT6231S8, LT6232GN LT6231DD 0.1Hz to 10Hz f = 10kHz f = 10kHz 10k 10kHz 10k S < MIN TYP MAX UNITS ...

Page 7

... ENABLE Pin Input Voltage HIGH H Output Leakage Current t Turn-On Time ON t Turn-Off Time OFF GBW Gain Bandwidth Product SR Slew Rate FPBW Full Power Bandwidth t Settling Time (LT6230, LT6231, LT6232) S LT6230/LT6230-10/ CONDITIONS Common Mode Differential Mode Common Mode Differential Mode V = 4.5V 10k ...

Page 8

... O ENABLE = ENABLE = – 1k – LT6230-10 –10 1k (Note 9) OUT P-P LT6230, LT6231, LT6232 < MIN TYP MAX 600 450 550 800 0 0.7 100 27 6 – 200 ...

Page 9

... ENABLE = 0.3V ENABLE = 4.8V ENABLE = ENABLE = – 1k – LT6230-10 –10 1k OUT P-P LT6230, LT6231, LT6232 LT6230/LT6230-10/ LT6231/LT6232 < MIN TYP MAX 700 550 650 1000 0 1.1 0 4.8 – ...

Page 10

... Note 6: Matching parameters are the difference between the two amplifiers A and D and between B and C of the LT6232; between the two amplifiers of the LT6231. CMRR and PSRR match are defined as follows: CMRR and PSRR are measured in V/V on the matched amplifiers. The difference is calculated between the matching sides in V/V ...

Page 11

... 2. 1. 100 120 TIME AFTER POWER-UP (s) LT6230/LT6230-10/ LT6231/LT6232 Output Short Circuit Current vs Power Supply Voltage – 125 C A –20 –30 –40 – –60 –70 4 4 ...

Page 12

... LT6230/LT6230-10/ LT6231/LT6232 W U TYPICAL PERFOR A CE CHARACTERISTICS (LT6230/LT6231/LT6232) Noise Voltage and Unbalanced Noise Current vs Frequency 2. NOISE CURRENT 2 1 NOISE VOLTAGE 0 10 100 1k 10k 100k FREQUENCY (Hz) 623012 G16 Open Loop Gain vs Frequency 5pF ...

Page 13

... OUT (P– 100 , 3RD L – 100 , 2ND L – 1k, 2ND L –80 – 1k, 3RD L –100 10k 100k 1M 10M FREQUENCY (Hz) LT6230/LT6230-10/ LT6231/LT6232 Series Output Resistance and Overshoot vs Capacitive Load 5V ...

Page 14

... LT6230/LT6230-10/ LT6231/LT6232 W U TYPICAL PERFOR A CE CHARACTERISTICS (LT6230/LT6231/LT6232) Distortion vs Frequency – 100 , 3RD V L – (P–P) OUT R = 100 , 2ND – 1k, 3RD –70 L –80 – 1k, 2ND L –100 10k 100k 1M FREQUENCY (Hz) 623012 G34 Large Signal Response 5V 0V – ...

Page 15

... 40dBc 10k 100k 1M 10M FREQUENCY (Hz) LT6230/LT6230-10/ LT6231/LT6232 Series Output Resistor and Overshoot vs Capacitive Load 5V 105 125 10 100 1000 ...

Page 16

... LT6230/LT6230-10/ LT6231/LT6232 W U TYPICAL PERFOR A CE CHARACTERISTICS (LT6230-10 and 3 Harmonic Distortion vs Frequency – – (P–P) OUT R = 100 , 2ND L – 100 , 3RD L – 1k, 3RD – 1k, 2ND L –90 –100 10k 100k 1M 10M FREQUENCY (Hz) 623012 G51 Small Signal Response 2 ...

Page 17

... U APPLICATIO S I FOR ATIO Amplifier Characteristics Figure simplified schematic of the LT6230/LT6231/ LT6232, which has a pair of low noise input transistors Q1 and Q2. A simple current mirror Q3/Q4 converts the differential signal to a single-ended output, and these transistors are degenerated to reduce their contribution to the overall noise. ...

Page 18

... I current. In applications that require N SUPPLY low noise voltage with the lowest possible supply current, this product can prove to be enlightening. The LT6230/ LT6231/LT6232 have an e • SUPPLY per amplifier, yet it is common to see amplifiers with similar noise specifications to have ...

Page 19

... V 511 – U1 LT6230-10 R15 + 88.7 EN R13 2k R4 R16 R12 + V 511 88.7 511 R14 C4 2k – LT6230- LT6230/LT6230-10/ LT6231/LT6232 Frequency Response Plot of Bandpass Filter 23 3 –7 100k 1M FREQUENCY (Hz) C8 68pF + R10 V 511 – OUT LT6230 + EN C9 68pF V = 100 (V – OUT ...

Page 20

... LT6230/LT6230-10/ LT6231/LT6232 PACKAGE DESCRIPTIO 0.62 0.95 MAX REF 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6 ...

Page 21

... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON TOP AND BOTTOM OF PACKAGE U DD Package 8-Lead Plastic DFN (3mm 3mm) (Reference LTC DWG # 05-08-1698) 0.675 0.05 PACKAGE OUTLINE 0.50 BSC 2.38 0.05 (2 SIDES 0.115 1.65 0.10 3.00 0.10 (2 SIDES) (4 SIDES) 0.25 0.05 0.75 0.05 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD LT6230/LT6230-10/ LT6231/LT6232 0.38 0.10 TYP 5 8 (DD8) DFN 1203 4 1 0.50 BSC 2.38 0.10 (2 SIDES) sn623012 623012fas 21 ...

Page 22

... LT6230/LT6230-10/ LT6231/LT6232 PACKAGE DESCRIPTIO .050 BSC .245 MIN .030 .005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 – .020 (0.254 – 0.508) .008 – .010 (0.203 – 0.254) (0.406 – 1.270) NOTE: 1. DIMENSIONS IN 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. ...

Page 23

... BSC .015 .004 45 .0532 – .0688 (0.38 0.10) (1.35 – 1.75) 0 – 8 TYP .008 – .012 (0.203 – 0.305) TYP LT6230/LT6230-10/ LT6231/LT6232 .189 – .196* (4.801 – 4.978) .009 (0.229 REF .150 – .157** (3.810 – 3.988 ...

Page 24

... LT6230/LT6230-10/ LT6231/LT6232 U TYPICAL APPLICATIO S The LT6230 is applied as a transimpedance amplifier with an I-to-V conversion gain of 1.5k set by R1. The LT6230 is ideally suited to this application because of its low input offset voltage and current, and its low noise. This is be- cause the 1.5k resistor has an inherent thermal noise of 5nV ...

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