Cirrus Logic CS3003 User Manual

Precision Low-voltage Amplifier

8-Lead SOIC

CS3003

(Top View)

1. Must not be connected.

NC

-IN

+IN

V-

NC

V+

Output

NC

-

+

1

1

1

1

2

3

4

8

7

6

5

1

10

100

1000

0.01 0.1 1 10

Frequency (Hz)

-200

-150

-100

-50

0

50

100

150

200

012345678910

Time (sec)

Noise vs. Frequency (Measured) 0.01 Hz to 10 Hz Noise Performance

CS3003

Features & Description

 Low Offset:

–10 μV Max.

Low Drift:



–0.05 μV/°C Max.

Low Noise:



– 17 nV/√Hz

 Open-loop Voltage Gain:

– 150 dB Typ.

Rail-to-Rail Inputs


 Rail-to-Rail Output Swing

– to within 10 mV of supply voltage

1.0 mA Supply Current


 Slew rate:

–0.25 V/μs

Applications

 Thermocouple/Thermopile Amplifiers
 Load Cell and Bridge Transducer Amplifiers
 Precision Instrumentation
 Battery-powered Systems

Description

The CS3003 single amplifier is designed for precision
amplification of low-level signals. This amplifier achieves
excellent offset stability, high open loop gain, and low
noise. The devices also exhibit excellent CMRR and
PSRR. The common mode input range includes the sup­ply rails. The amplifier operates with any supply voltage
from 2.7 V to 5 V (±1.35 V to ±2.50 V).

Pin Configuration

Cirrus Logic, Inc.

http://www.cirrus.com

Copyright  Cirrus Logic, Inc. 2009

(All Rights Reserved)

OCT ‘09

DS735F3

TABLE OF CONTENTS

1. CHARACTERISTICS AND SPECIFICATIONS ............................................. 3

1.1 5 V Electrical Characteristics ................................................................... 3

1.2 3 V Electrical Characteristics ................................................................... 4

1.3 Absolute Maximum Ratings ..................................................................... 5

2. TYPICAL PERFORMANCE PLOTS .............................................................. 5

3. PACKAGE DRAWINGS ................................................................................. 7

4. ORDERING INFORMATION .......................................................................... 8

5. ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION ... 8

6. REVISION HISTORY .................................................................................... 9

LIST OF FIGURES

Figure 1. Noise vs Frequency (Measured) .................................................................................5

Figure 2. 0.01 Hz to 10 Hz Noise ...............................................................................................5

Figure 3. Gain & Phase vs. Frequency (2.7 V) ...........................................................................5

Figure 4. Gain & Phase vs. Frequency (5 V) ..............................................................................5

Figure 5. Supply Current vs. Supply Voltage ..............................................................................5

Figure 6. Supply Current vs. Temperature .................................................................................5

Figure 7. Voltage Swing vs. Output Current (2.7 V) ...................................................................6

Figure 8. Voltage Swing vs. Output Current (5 V) ......................................................................6

CS3003

2 DS735F3

CS3003

nV/ Hz

nV/ Hz

fA/ Hz

1. CHARACTERISTICS AND SPECIFICATIONS

1.1 5 V Electrical Characteristics

V+ = +5 V, ±5%; V- = 0V; VCM = 2.5 V; Unless otherwise noted,

Parameter Min Typ Max Unit

Input Offset Voltage (Note 2) • -±2±10µV

Average Input Offset Drift (Note 2) • - ±0.01 ±0.05 µV/ºC

Input Bias Current

Input Offset Current

Input Noise Voltage Density R

= 100 Ω, f0 = 1 Hz

S

R

= 100 Ω, f0 = 1 kHz

S

Input Noise Voltage 0.1 to 10 Hz - 350 - nV

Input Noise Current Density f0 = 1 Hz - 100 -

Input Noise Current 0.1 to 10 Hz - 1.9 pA

Input Voltage Range (Note 2) • V- - V+ V

Common Mode Rejection Ratio (dc) • 110 120 - dB

Power Supply Rejection Ratio • 110 130 - dB

Large Signal Voltage Gain
(Note 3)R

Output Voltage Swing R
(Note 4)R

Slew Rate R

= 2 kΩ to V+/2 •

L

= 2 kΩ to V+/2

L

= 100 kΩ to V+/2

L

= 2 k, 100 pF 0.25 - V/µs

L

Overload Recovery Time - 25 - µs

Supply Current • -1.01.3mA

Chopping Frequency - 150 - kHz

Input Capacitance Differential
Common Mode

TA = 25º C (See Note 1).

-

•

-

-

•

-

-

-

-

120

• (V+ – 100)
(V+ – 10)

-

-

±170

-

±340

-

17
17

150
150

-

-

1.5
10

±250

±1.5

±500

±3.0

-

-

-

-

(V- + 100 )

(V- + 10)

-

-

pA
nA

pA
nA

p-p

p-p

dB
dB

mV
mV

pF
pF

Notes: 1. Symbol “•” denotes specification applies over -40 to +125

° C.

2. This parameter is guaranteed by design and/or laboratory characterization.

3. Guaranteed within the output limits of (V+ – 0.2 V) to (V- + 0.2 V).

4. Specifies the worst case drive voltage relative to the supply rail under stated load conditions.

DS735F3 3