Cirrus Logic CS5373A User Manual

CS5373A

24-Bit

ΔΣ

Test DAC

Attenuator

1/1 to 1/64

Clock

Generator

VA+

MODE(0, 1, 2)ATT(0, 1, 2)

VD

VA-

VREF+ VREF-

GND

MCLK
MSYNC

24-Bit

ΔΣ

Modulator

OUT+
OUT­BUF+
BUF-

TDATA

CAP+
CAP-

MDATA
MFLAG

INR+
INF+
INF­INR-

Low-power, High-performance

Modulator Features

 Fourth-order ΔΣ Architecture

• Clock-jitter-tolerant architecture

• Input signal bandwidth: DC to 2 kHz

• Max AC amplitude: 5 V

• Max DC amplitude: ± 2.5 V

High Dynamic Range



• 127 dB SNR @ 215 Hz BW (2 ms sampling)

• 124 dB SNR @ 430 Hz BW (1 ms sampling)

Low Total Harmonic Distortion



• -118 dB THD typical (0.000126%)

• -112 dB THD maximum (0.000251%)



Low Power Consumption: 25 mW, 10 µW

Test DAC Features

 Digital ΔΣ Input from CS5378 Digital Filter
 Selectable Differential Analog Outputs

• Precision output (OUT±) for electronics tests

• Buffered output (BUF±) for sensor tests



Multiple AC and DC Operational Modes

• Output signal bandwidth: DC to 100 Hz

• Max AC amplitude: 5 V

• Max DC amplitude: + 2.5 V



Selectable Attenuation to Match CS3301A/02A

• 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64

Outstanding Performance



• OUT AC: -115 dB THD typical, -112 dB maximum

• BUF AC: -105 dB THD typical, -95 dB maximum

• OUT DC: Differential VREF ± 10 mV typical

• BUF DC: Differential VREF ± 25 mV typical



Low Power Consumption

• AC modes / DC modes: 40 mW / 25 mW

• Sleep mode / Power down: 2.5 mW / 600 µW

differential

pp

differential

dc

differential

pp

differential

dc

ΔΣ

Modulator and Test DAC

Description

The CS5373A is a high-performance, fourth-order ΔΣ
modulator integrated with a ΔΣ digital-to-analog convert­er (DAC). When combined with a CS3301A/02A
differential amplifier and the CS5378 digital filter, a
small, low-power, self-testing, high-accuracy, single­channel measurement system results.

The modulator has high dynamic range and low total har­monic distortion with very low power consumption. It
converts differential analog input signals from the
CS3301A/02A amplifier to an oversampled serial bit
stream at 512 kbits per second. This oversampled bit
stream is then decimated by the CS5378 digital filter to a
24-bit output at the selected output word rate.

The test DAC operates in either AC or DC test modes.
AC test modes measure system dynamic perfo rmance
through THD and CMRR tests while DC test modes are
for gain calibration and pulse tests. It has two sets of dif­ferential analog outputs, OUT and BUF, as dedicated
outputs for testing the electronics channel and for in­circuit sensor tests. Output attenuation settings are
binary weighted and match the gain settings of the
CS3301A/02A differential amplifiers for full-scale testing
at all gain ranges.

ORDERING INFORMATION

See page 39.

Common Features

 Extremely Small Footprint

• 28-pin SSOP package, 8 mm x 10 mm

Bipolar Power Supply Configuration



http://www.cirrus.com

• VA+ = +2.5 V; VA- = -2.5 V; VD = +3.3 V

Copyright  Cirrus Logic, Inc. 2010

(All Rights Reserved)

OCT ‘10

DS703F2

TABLE OF CONTENTS

1. CHARACTERISTICS AND SPECIFICATIONS ........................................................................4

SPECIFIED OPERATING CONDITIONS .................................................................................4

TEMPERATURE CONDITIONS ...............................................................................................5

ABSOLUTE MAXIMUM RATINGS ........................................................................................... 5

ANALOG INPUT CHARACTERISTICS ................................................................................... 6

ANALOG OUTPUT CHARACTERISTICS ............................................................................... 7

MODULATOR CHARACTERISTICS........................................................................................8

PERFORMANCE PLOTS.......................... ... .... ...................................... .... ... ... ... .... ... ... ... ... .... . 9

DAC AC DIFFERENTIAL MODES 1, 2, 3............................ ... .... ... ... ... ... .... ... ......................... 10

DAC AC DIFFERENTIAL MODES 1, 2, 3 (CONT.) ............................................................... 11

DIGITAL CHARACTERISTICS ..............................................................................................15

DIGITAL CHARACTERISTICS (CONT.) ...............................................................................16

DIGITAL CHARACTERISTICS (CONT.) ............................................................................17

POWER SUPPLY CHARACTERISTICS................................................................................18

2. GENERAL DESCRIPTION ..................................................................................................... 19

2.1 Delta-Sigma Modulator .................................................................................................... 19

2.2 Digital-to-Analog Converter ........................................................................... .... ... ... ... ... ... 19

3. SYSTEM DIAGRAM ............................................................................................................20

4. POWER MODES ..................................................................................................................... 21

4.1 Power Down .....................................................................................................................21

4.2 Sleep Mode ............ ... .... ...................................... .... ... ... ... .... ............................................ 21

4.3 Modulator Mode ............ ... ... ... ....................................... ... .... ... ... ... ... ................................ 21

4.4 AC Test Modes ................................ ... ....................................... ... ... ................................ 21

4.5 DC Test Modes ......... .... ...................................... .... ... ....................................... ... ... ... ...... 21

5. OPERATIONAL MODES ........................................................................................................22

5.1 Modulator Mode ............ ... ... ... ....................................... ... .... ... ... ... ... ................................ 22

5.1.1 Modulator One’s Density ..................... ... .... ... ....................................... ... ... ... ... ... 22

5.1.2 Modulator Decimated Output ........... ... ... .... ... ... ... .... ...................................... ... ... 22

5.1.3 Modulator Synchronization ..................... .... ... ... ... .... ... ... ... ... ................................ 22

5.1.4 Modulator Idle Tones ..........................................................................................23

5.1.5 Modulator Stability .................. ....................................... ... ... ................................ 23

5.2 AC Test Modes ................................ ....................................... ... ... ................................... 23

5.2.1 AC Differential ........................................ .... ... ... ... .... ... ... ... ................................... 23

5.2.2 AC Common Mode ..............................................................................................24

5.2.3 DAC Stability .......................................... .... ... ... ....................................... ... ... ......24

5.3 DC Test Modes ......... .... ...................................... .... ... ....................................... ... ... ... ...... 24

5.3.1 DC Common Mode ............................................................................................. 24

5.3.2 DC Differential ............................................................... ... ... ................................ 25

5.4 Sleep Mode ............ ... .... ...................................... .... ... ... ... .... ............................................ 25

6. DIGITAL SIGNALS .................................................................................................................26

6.1 MCLK Connection .. ... .... ... ... ... .... ... ....................................... ... ... ......................................26

6.2 MSYNC Connection ...................................................................... ... .... ............................ 26

6.3 MDATA Connection ............................... .... ... ... ... .... ... ....................................... ... ... ... ... ... 27

6.4 MFLAG Connection ...................................................... ... .... ... ... ... ... .... ... ... ......................27

6.5 TDATA Connection ............. ... .... ... ....................................... ... ... ... ... .... ... ... ... .... ...............27

6.6 GPIO Connections .... .... ...................................... .... ... ....................................... ... ... ... ......27

7. ANALOG SIGNALS ................................................................................................................ 28

7.1 INR±, INF± Modulator Inputs ................. .......................................................................... 28

7.1.1 Modulator Input Impedance .......................................... ... ... ................................ 28

7.1.2 Modulator Anti-alias Filter ................................... .... ... ... ...................................... 28

7.2 DAC Output Attenuation .................................................. .... ... ... ... ... .... ... ... ......................29

7.3 DAC OUT± Precision Output .............. ....................................... ... ... ................................ 29

7.4 DAC BUF± Buffered Output ................................ .... ... ... ... .... ... ... ...................................... 30

CS5373A

2 DS703F2

CS5373A

7.5 DAC CAP± Connection ............................. ... ... ... .... ... ....................................... ... ... ... ... ... 30

7.6 Analog Differential Signals ........................................ ... ................................................... 30

8. VOLTAGE REFERENCE ........................................................................................................ 31

8.1 VREF Power Supply ........................ ... ... .... ... ... ....................................... ... ... .... ... ... ......... 31

8.2 VREF RC Filter ................................................................................................................ 31

8.3 VREF PCB Routing ......................................................................................................... 31

8.4 VREF Input Impedance ................................................................................................... 31

8.5 VREF Accuracy ........ ....................................... ... .... ... ... ... .... ...................................... ... ... 32

8.6 VREF Independence .......... ... .... ... ... ....................................... ... ... ... .... ... ... ...................... 32

9. POWER SUPPLIES ................................................................................................................ 33

9.1 Power Supply Bypassing ................. ... ... .... ... ... ... ....................................... ... .... ... ... ... ... ... 33

9.2 PCB Layers and Routing ........................................... ... ... .... ... ... ... ... .... ... ... ... .... ............... 33

9.3 Power Supply Rejection ............................... ... ... .... ... ... ... .... ... ... ... ... .... ............................ 33

9.4 SCR Latch-up ........................................ .... ... ... ... ....................................... ... .... ... ... ... ...... 34

9.5 DC-DC Converters ............................. ... .... ... ... ... .... ... ... ....................................... ... ... ... ... 34

10. TERMINOLOGY ................................................... ... ....................................... ... .... ... ... ... ...... 35

11. PIN DESCRIPTION ............................................................................................................... 36

12. PACKAGE DIMENSIONS .................................................................................................... 38

13. ORDERING INFORMATION ............................................................................................... 39

14. ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION . ... ... .... ... ... ... ... ... 39

15. REVISION HISTORY ........................................................................................................... 39

LIST OF FIGURES

Figure 1. Modulator Noise Performance......................................................................................... 9

Figure 2. Modulator + Test DAC Dynamic Performance................................................................. 9

Figure 3. Digital Input Rise and Fall Times ................................................................................... 15

Figure 4. System Timing Diagram.................................................................................................17

Figure 5. MCLK / MSYNC Timing Detail....................................................................................... 17

Figure 6. CS5373A Block Diagram............................................................................................... 19

Figure 8. Connection Diagram...................................................................................................... 20

Figure 7. System Diagram ............................................................................................................ 20

Figure 9. Power Mode Diagram....................................................................................................21

Figure 10. AC Differential Modes.................................................................................................. 23

Figure 11. AC Common Mode ...................................................................................................... 24

Figure 12. DC Test Modes............................................................................................................ 25

Figure 13. Digital Signals.............................................................................................................. 26

Figure 14. Analog Signals............................................................................................................. 28

Figure 15. DAC Output Attenuation Settings ................................................................................ 29

Figure 16. Voltage Reference Circuit............................................................................................31

Figure 17. Power Supply Diagram................................................................................................ 33

LIST OF TABLES

Table 1. Selections for Operational Mode and DAC Attenuation.................................................... 4

Table 2. Operational Modes.......................................................................................................... 22

Table 3. Output Coding for the CS5373A Modulator and CS5378 Digital Filter Combination...... 22

DS703F2 3

CS5373A

Modes of Operation

Selection

MODE

[2:0] Mode Description

0 000

Modulator: enabled.
DAC: sleep.

1 001

Modulator: enabled.
DAC: AC OUT and BUF outputs.

2 010

Modulator: enabled.
DAC: AC OUT only, BUF high-z.

3011

Modulator: enabled.
DAC: AC BUF only, OUT high-z.

4 100

Modulator: enabled.
DAC: DC common mode output.

5 101

Modulator: enabled.
DAC: DC differential output.

6110

Modulator: enabled.
DAC: AC common mode output.

7111

Modulator: sleep.
DAC: sleep.

DAC Attenuation

Selection ATT[2:0] Attenuation dB

0 000 1/1 0dB
1 0 0 1 1/2 -6.02 dB
2 0 1 0 1/4 -12.04 dB
3 0 1 1 1/8 -18.06 dB
4 1 0 0 1/16 -24.08 dB
5 1 0 1 1/32 -30.10 dB
6 11 0 1/64 -36.12 dB
7 111 reserved reserved

Table 1. Selections for Operational Mode and DAC Attenuation

1. CHARACTERISTICS AND SPECIFICATIONS

• Min / Max characteristics and specifications are guaranteed over the Specified Operating Conditions.

• Typical performance characteristics and specifications are measured at nominal supply voltages and T

• GND = 0 V. Single-ended voltages with respect to GND, differential voltages with respect to opposite half.

• Device is connected as shown in Figure 8 on page 20 unless otherwise noted.

SPECIFIED OPERATING CONDITIONS

Parameter Symbol Min Nom Max Unit

Bipolar Power Supplies

Positive Analog
Negative Analog (Note 1)
Positive Digital

Voltage Reference

{VREF+} - {VREF-} (Note 2, 3) VREF - 2.500 - V
VREF- (Note 4)VREF- - VA- - V

Thermal

Ambient Operating Temperature Industrial (-IS, -ISZ) T

± 2% VA+ 2.45 2.50 2.55 V
± 2% V A- -2.45 -2.50 -2.55 V
± 3% VD 3.20 3.30 3.40 V

A

-40 25 85 °C

= 25°C.

A

Notes: 1. VA- must always be the most-negative input voltage to avoid potential SCR latch-up conditions.

4 DS703F2

2. By design, a 2.500 V voltage reference input results in the best signal-to-noise performance.

3. Full-scale accuracy is directly proportional to the voltage reference absolute accuracy.

4. VREF inputs must satisfy: VA- <

VREF- < VREF+ < VA+.

CS5373A

TEMPERATURE CONDITIONS

Parameter Symbol Min Typ Max Unit

Ambient Operating Temperature T
Storage Temperature Range T
Allowable Junction Temperature T
Junction to Ambient Thermal Impedance (4-layer PCB) Θ

A

STR

JCT

JA

ABSOLUTE MAXIMUM RATINGS

Parameter Symbol Min Max Parameter

DC Power Supplies Positive Analog

Negative Analog

Digital
Analog Supply Differential (VA+) - (VA-) VA
Digital Supply Differential (VD) - (VA-) VD
Input Current, Power Supplies (Note 5)I
Input Current, Any Pin Except Supplies (Note 5, 6)I
Output Current (Note 5)I
Power Dissipation PDN - 500 mW
Analog Input Voltages V
Digital Input Voltages V

VA+

VA-

VD

DIFF
DIFF

PWR

IN

OUT

INA
IND

-40 - 85 ºC

-65 - 150 ºC

--125ºC

-65-ºC/W

-0.5

-6.8

-0.5

6.8

0.5

6.8

V
V
V

-6.8V

-7.6V

- ±50 mA

- ±10 mA

- ±25 mA

(VA-) - 0.5 (VA+) + 0.5 V

-0.5 (VD) + 0.5 V

WARNING: Operation at or beyond these limits may result in permanent damage to the device.

Normal operation is not guaranteed at these extremes.

Notes: 5. Transient currents up to ±100 mA will not cause SCR latch-up.

6. Includes continuous over-voltage conditions at the modulator analog input pins.

DS703F2 5

CS5373A

ANALOG INPUT CHARACTERISTICS

Parameter Symbol Min Typ Max Unit

VREF Input

{VREF+} - {VREF-} (Note 2, 3) VREF - 2.500 - V
VREF- (Note 4)VREF- - VA- - V
VREF Input Current, Modulator Only VREF
VREF Input Current, Modulator + DAC AC Mode VREF
VREF Input Current, Modulator + DAC DC Mode VREF
VREF Input Noise (Note 7)VREF

IMOD
IMAC
IMDC

IN

Modulator INR±, INF± Inputs

External Anti-alias Filter Series Resistance
(Note 8, 9) Differential Capacitance

Differential Input Impedance INR

INF±

Single-ended Input Impedance INR

INF±

R

AA

C

AA

±

ZDIF

INR

ZDIF

INF

±

ZSE

INR

ZSE

INF

DAC CAP± Input

External Anti-alias Filter Differential Capacitance

C

AA

(Note 9)

-120- µA

-200- µA

-160- µA

--1µV

-

-

-

-

-

-

680

20
20

1

40

2

-

-

-

-

-

-

rms

Ω

nF

kΩ

MΩ

kΩ

MΩ

-10- nF

Notes: 7. Maximum integrated noise over the measurement bandwidth for the voltage reference device attached

to the VREF

± inputs.

8. The modulator analog inputs are normally driven by a CS3301A/02A amplifier.

9. Differential anti-alias capacitors are discrete external components and must be of good quality (C0G,
NPO, poly). Poor quality capacitors will degrade total harmonic distortion (THD) performance.

6 DS703F2

ANALOG OUTPUT CHARACTERISTICS

Parameter Symbol Min Typ Max Unit

DAC Analog OUT±

Analog External Load at OUT
(Note 10, 11) Load Capacitance

Differential Output Impedance 1/1

Single-ended Output Impedance 1/1

High-Z Impedance HZ
Crosstalk to BUF

DAC Analog BUF± Output

Analog External Load at BUF
(Note 10) Load Capacitance

Differential Output Impedance 1/1 - 1/64 ZD IF
Single-ended Output Impedance 1/1 - 1/32

High-Z Impedance HZ
Crosstalk to OUT

Output

± Load Resistance

± High-Z Output

± Load Resistance

± High-Z Output

R
C

ZDIF
1/2
1/4
1/8

1/16
1/32
1/64

ZSE
1/2
1/4
1/8

1/16
1/32
1/64

XT

R
C

ZSE

(Note 12) (BUF-) 1/64

(Note 12) (BUF+) 1/64

XT

LOUT
LOUT

OUT

OUT

OUT

OUT

LBUF
LBUF

BUF

BUF

BUF
BUF

CS5373A

50

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-3-MΩ

--120- dB

1

-

-6- Ω

-

-

-

-4.5- MΩ

--120- dB

-

-

1.4

10.1

7.9

5.1

3.3

2.3

1.7

0.8

7.4

9.0

9.4

9.5

9.5

9.2

-

-

4
4

100

50

-

MΩ

pF

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

2

-

kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ

kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ

kΩ
nF

Ω

-

-

Notes: 10. Guaranteed by design and/or characterization.

11. Load on the precision OUT± outputs is normally from a CS3301A/02A amplifier, which has 2 GΩ/1 TΩ
typical input impedance and 18 pF typical input capacitance.

12. Single-ended output impedance at 1/64 is different for BUF+ and BUF- due to the output attenuator
architecture.

DS703F2 7

CS5373A

MODULATOR CHARACTERISTICS

Parameter Symbol Min Typ Max Unit

Input Characteristics

Input Signal Frequencies (Note 10, 13) V
Full Scale Differential AC Input (Note 10)V
Full Scale Differential DC Input (Note 10)V
Input Voltage Range (Signal + Vcm)(Note 10, 14) V

Input Common Mode Voltage (Note 15) V

BW
AC
DC

RNG

CM

Dynamic Performance

Dynamic Range DC to 1720 Hz

SNR -

(Note 16)DCto860Hz

DC to 430 Hz
DC to 215 Hz
DC to 108 Hz
DC to 54 Hz
DC to 27 Hz

Signal Dependent Noise DC to 430 Hz

SDN 100 110 - dB

(Note 17, 18)
Total Harmonic Distortion (Note 18) THD - -118 -112 dB
Linearity (Note 18)LIN ­Common Mode Rejection Ratio CMRR - 90 - dB

Gain Accuracy

Channel to Channel Gain Accuracy (Note 3)CGA ­Channel Gain Drift (Note 19)CGA

TC

Offset

Offset Voltage, Differential OFST - 100 - mV
Offset Voltage Drift (Note 19)OFST
Offset after Calibration (Note 20)OFST
Offset Calibration Range (Note 21)OFST

TC

CAL

RNG

DC - 1720 Hz

--5V

-2.5 - 2.5 V

(VA-)+0.7

- (VA+)-1.25 V

- (VA-)+2.5 -V

dB
dB
dB
dB
dB
dB
dB

-

121

-

-

-

-

109
121
124
127
130
133
136

0.000126 0.000251

-

-

-

-

-

-

-

±1 ±2%

- 5 - ppm/°C

-0.1-μV/°C

- ±1- μV

-100- %FS

pp
dc

%

Notes: 13. The upper bandwidth limit is determined by the CS5378 digital filter cut-off frequency.

14. No signals operating from external power supplies should be applied to pins of the device prior to its
own supplies being established. Connecting any terminal to voltages greater than VA+ or less than VA­may cause destructive latch-up.

15. Common mode voltage is defined as the mid-point of the differential signal.

16. Dynamic Range defined as 20 log [ (RMS full scale) / (RMS idle noise) ] where idle noise is measured
from a CS3301A/02A amplifier terminated input at 1x gain.

17. Signal Dependent Noise defined as 20 log [ (RMS full scale) / (RMS signal noise) ] where signal noise
is measured by subtracting the signal power at the fundamental and harmonic frequencies.

18. Tested with a 31.25 Hz sine wave at -1 dB amplitude.

19. Specification is for the parameter over the specified temperature range and is for the device only. It does
not include the effects of external comp o ne nt s.

20. This specification applies to the effective offset voltage calculated from the output codes of the CS5378
digital filter following offset calibration and correction.

21. Offset calibration is performed in the CS5378 digital filter and includes the full-scale signal range.

8 DS703F2

PERFORMANCE PLOTS

Figure 1. Modulator Noise Performance

Figure 2. Modulator + Test DAC Dynamic Performance

CS5373A

DS703F2 9

DAC AC DIFFERENTIAL MODES 1, 2, 3

Parameter Symbol Min Typ Max Unit

AC Differential Characteristics

1/2
1/4
1/8

VAC

FS

BW
IMP

ABS
REL

TC

CM

CMTC

Full-scale Differential AC Output 1/1

1/16
1/32

1/64
Full-scale Bandwidth (Note 10) VAC
Impulse Amplitude (Note 10, 22)VAC

AC Differential Accuracy

Full-scale Accuracy (Note 3, 23)VAC
Relative Accuracy (Note 24)VAC
Full-scale Drift (Note 19)VAC

DC Common Mode Characteristics

Common Mode (Note 15) VAC
Common Mode Drift (Note 15, 19)VAC

CS5373A

-

-

-

-

-

-

-

5

2.5

1.25
625

312.5

156.25

78.125

-

-

-

-

-

-

-

--100Hz

---20dBfs

-+1+2%FS

-+1+2%FS

-8-μV/°C

- (VA-)+2.35 -V

-2-μV/°C

V
V

V
mV
mV
mV
mV

pp
pp
pp

pp
pp
pp
pp

Notes: 22. Maximum amplitude for DAC operation above 100 Hz. A reduced amplitude for higher frequencies is

required to guarantee stability of the low-power ΔΣ DAC architecture.

23. Full-scale accuracy tests the matching of 1/1 attenuation across multiple devices.

24. Relative accuracy tests the tracking of 1/1,1/2,1/4,1/16,1/32,1/64 attenuation relative to 1 /8 attenuation
on a single device.

10 DS703F2

DAC AC DIFFERENTIAL MODES 1, 2, 3 (CONT.)

Parameter Symbol Min Typ Max Unit

Signal to Noise

1/4
1/8

1/4
1/8

1/4

1/8

1/4

1/8

SNR

SNR

SNR

THD

THD

THD

OUT

BUF

BUFL

OUT

BUF

BUFL

Signal to Noise (OUT
(Note 25) 1/2

Signal to Noise (BUF
(Note 25, 26) 1/2

Signal to Noise (BUF
(Note 25, 26)

Total Harmonic Distortion

Total Harmonic Distortion (OUT
(Note 18, 27)1/2

Total Harmonic Distortion (BUF
(Note 18, 26, 27) 1/2

Total Harmonic Distortion (BUF
(Note 18, 26, 27)

± Unloaded) 1/1

1/16
1/32
1/64

± Unloaded) 1/1

1/16
1/32
1/64

± 1kΩ load) 1/1

± Unloaded) 1/1

1/16
1/32
1/64

± Unloaded) 1/1

1/16
1/32
1/64

± 1kΩ load) 1/1

110

-

-

-

-

-

-

100

-

-

-

-

-

-

100 110 - dB

-

-

-

-

-

-

-

-

-

-

-

-

-

-

--95-85 dB

114
114
114
113

111
107
102

111
107
102

96
90
84
78

-115

-118

-116

-111

-109

-107

-101

-111

-107

-102

-97

-92

-86

-80

-112

-95

CS5373A

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

dB
dB
dB
dB
dB
dB
dB

dB
dB
dB
dB
dB
dB
dB

dB
dB
dB
dB
dB
dB
dB

dB
dB
dB
dB
dB
dB
dB

Notes: 25. Specification measured using CS3301A amplifier at corresponding gain with the modulator measuring

a 400 Hz bandwidth. Amplified noise dominates for x16, x32, x64 amplifier gains.

26. Buffered outputs (BUF

27. Specification measured using CS3301A amplifier at corresponding gain using the modulator measuring
a 400 Hz bandwidth. Amplified noise in the harmonic bins dominates THD measurements for x16, x32,
x64 amplifier gains.

DS703F2 11

±) include 1/f noise not present on the prec isio n ou tp ut s (OU T±).

DAC DC COMMON MODE 4

Parameter Symbol Min Typ Max Unit

DC Common Mode Characteristics

Common Mode Output VDC
Common Mode Drift (Note 19)VDC

DC Common Mode Accuracy

1/4

1/8
1/16
1/32
1/64

1/4

1/8
1/16
1/32
1/64

VDC
VDC

N

N

N

OUT

BUF

BUFL

Common Mode Match (OUT
Common Mode Match (BUF

±)

±)

Noise

Noise (OUT

± Unloaded) 1/1

(Note 25) 1/2

Noise (BUF± Unloaded) 1/1
(Note 25, 26) 1/2

Noise (BUF± 1kΩ load) 1/1
(Note 25, 26)

CM

CMTC

CMM
CMM

CS5373A

- (VA-)+2.35 -V

-2-μV/°C

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-5.6-μV

+10
+25

4.4

5.6

5.6

5.6

5.6

9.9

17.7

5.6

8.9

12.5

28.0

55.9

99.4

198.3

-mV

-mV

-

-

-

-

-

-

-

-

-

-

-

-

-

-

μV
μV
μV
μV
μV
μV
μV

μV
μV
μV
μV
μV
μV
μV

rms
rms
rms
rms
rms
rms
rms

rms
rms
rms
rms
rms
rms
rms

rms

12 DS703F2