a
Precision CMOS Single Supply Rail-to-Rail Input/Output Wideband Operational Amplifiers AD8601/AD8602/AD8604
FEATURES Low Offset Voltage: 500 V Max Single Supply Operation: 2.7 V to 6 V Low Supply Current: 750 A/Amplifier Wide Bandwidth: 8 MHz Slew Rate: 5 V/s Low Distortion No Phase Reversal Low Input Currents Unity Gain Stable APPLICATIONS Current Sensing Barcode Scanners PA Controls Battery-Powered Instrumentation Multipole Filters Sensors ASIC Input or Output Amplifier Audio GENERAL DESCRIPTION
The AD8601, AD8602, and AD8604 are single, dual, and quad rail-to-rail input and output single supply amplifiers featuring very low offset voltage and wide signal bandwidth. These amplifiers use a new, patented trimming technique that achieves superior performance without laser trimming. All are fully specified to operate from 3 V to 5 V single supply. The combination of low offsets, very low input bias currents, and high speed make these amplifiers useful in a wide variety of applications. Filters, integrators, diode amplifiers, shunt current sensors, and high impedance sensors all benefit from the combination of performance features. Audio and other ac applications benefit from the wide bandwidth and low distortion. For the most cost-sensitive applications the D grades offer this ac performance with lower dc precision at a lower price point. Applications for these amplifiers include audio amplification for portable devices, portable phone headsets, bar code scanners, portable instruments, cellular PA controls, and multipole filters.
FUNCTIONAL BLOCK DIAGRAMS 14-Lead TSSOP (RU Suffix) OUT A 1
14 OUT D
ⴚIN A 2
13 ⴚIN D
ⴙIN A 3
12 ⴙIN D
Vⴙ 4
AD8604
11 Vⴚ
ⴙIN B 5
10 ⴙIN C
ⴚIN B 6
9
ⴚIN C
OUT B 7
8
OUT C
14 OUT D
ⴚIN A 2
13 ⴚIN D
AD8604
AD8601
ⴙIN 3
4 ⴚIN
8-Lead SOIC (RM Suffix) 8 Vⴙ
AD8602
7 OUT B
ⴙIN A 3
6 ⴚIN B
Vⴚ 4
5 ⴙIN B
12 ⴙIN D 11 Vⴚ
ⴙIN B 5
10 ⴙIN C
ⴚIN B 6
9
ⴚIN C
7
8
OUT C
OUT B
Vⴚ 2
ⴚIN A 2
OUT A 1
Vⴙ 4
5 Vⴙ
OUT A 1
OUT A 1
14-Lead SOIC (R Suffix)
ⴙIN A 3
5-Lead SOT-23 (RT Suffix)
8-Lead SOIC (R Suffix) OUT A 1 ⴚIN A 2 ⴙIN A 3 Vⴚ 4
8 Vⴙ
AD8602
7 OUT B 6 ⴚIN B 5 ⴙIN B
The ability to swing rail-to-rail at both the input and output enables designers to buffer CMOS ADCs, DACs, ASICs, and other wide output swing devices in single supply systems. The AD8601, AD8602, and AD8604 are specified over the extended industrial (–40°C to +125°C) temperature range. The AD8601, single, is available in the tiny 5-lead SOT-23 package. The AD8602, dual, is available in 8-lead MSOP and narrow SOIC surface-mount packages. The AD8604, quad, is available in 14-lead TSSOP and narrow SOIC packages. SOT, µSOIC, and TSSOP versions are available in tape and reel only.
REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000
AD8601/AD8602/AD8604–SPECIFICATIONS ELECTRICAL CHARACTERISTICS (V = 3 V, V S
CM
= VS /2, TA = 25ⴗC unless otherwise noted) A Grade Min Typ Max
Parameter
Symbol
Conditions
INPUT CHARACTERISTICS Offset Voltage (AD8601/AD8602)
VOS
0 V ≤ VCM ≤ 1.3 V –40°C ≤ TA ≤ +85°C –40°C ≤ TA ≤ +125°C 0 V ≤ VCM ≤ 3 V1 –40°C ≤ TA ≤ +85°C –40°C ≤ TA ≤ +125°C VCM = 0 V to 1.3 V –40°C ≤ TA ≤ +85°C –40°C ≤ TA ≤ +125°C VCM = 0 V to 3.0 V1 –40°C ≤ TA ≤ +85°C –40°C ≤ TA ≤ +125°C
Offset Voltage (AD8604)
Input Bias Current
Input Offset Current
VOS
IB IOS
Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain
CMRR AVO
Offset Voltage Drift
∆VOS /∆T
OUTPUT CHARACTERISTICS Output Voltage High
VOH
Output Voltage Low
VOL
Output Current Closed-Loop Output Impedance
IOUT ZOUT
80
350
80
350
0.2 25 150 0.1
–40°C ≤ TA ≤ +85°C –40°C ≤ TA ≤ +125°C –40°C ≤ TA ≤ +85°C –40°C ≤ TA ≤ +125°C VCM = 0 V to 3 V VO = 0.5 V to 2.5 V RL = 2 kΩ , VCM = 0 V
IL = 1.0 mA –40°C ≤ TA ≤ +125°C IL = 1.0 mA –40°C ≤ TA ≤ +125°C f = 1 MHz, AV = 1
0 68 30
500 700 1,100 750 1,800 2,100 600 800 1,600 800 2,200 2,400 60 100 1,000 30 50 500 3
83 100 2
D Grade Min Typ Max
0 52 20
Unit
1,100 6,000 7,000 7,000 1,300 6,000 7,000 7,000 1,100 6,000 7,000 7,000 1,300 6,000 7,000 7,000 0.2 200 25 200 150 1,000 0.1 100 100 500 3 65
µV µV µV µV µV µV µV µV µV µV µV µV pA pA pA pA pA pA V dB
60 2
V/mV µV/°C
2.92 2.95 2.88 20 35 50 ± 30 12
2.92 2.95 2.88 20
67
56
35 50
± 30 12
V V mV mV mA Ω
POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier
PSRR ISY
VS = 2.7 V to 5.5 V VO = 0 V –40°C ≤ TA ≤ +125°C
DYNAMIC PERFORMANCE Slew Rate Settling Time Gain Bandwidth Product Phase Margin
SR tS GBP Φo
RL = 2 kΩ To 0.01%
5.2
