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CS5509-ASZ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
1
Copyright Cirrus Logic, Inc. 2009
(All Rights Reserved)
http://www.cirrus.com
CS5509
Single-supply, 16-bit A/D Converter
Features
Delta-sigma A/D Converter
- 16-bit, No Missing Codes
- Linearity Error: ±0.0015%FS
Differential Input
- Pin-selectable Unipolar/Bipolar Ranges
- Common Mode Rejection
105 dB @ dc
120 dB @ 50, 60 Hz
Either 5V or 3.3V Digital Interface
On-chip Self-calibration Circuitry
Output Update Rates up to 200/second
Ultra Low Power: 1.7 mW
Description
The CS5509 is a single-supply, 16-bit, serial-output
CMOS A/D converter. The CS5509 uses charge-bal-
anced (delta-sigma) techniques to provide low-cost,
high-resolution measurements at output word rates up to
200 samples per second.
The on-chip digital filter offers superior line rejection at
50Hz and 60Hz when the device is operated from a
32.768 kHz clock (output word rate = 20 Sps).
The CS5509 has on-chip self-calibration circuitry which
can be initiated at any time or temperature to ensure
minimum offset and full-scale errors.
Low power, high resolution, and small package size
make the CS5509 an ideal solution for loop-powered
transmitters, panel meters, weigh scales, and battery
powered instruments.
ORDERING INFORMATION
CS5509-ASZ -40 °C to +85 °C 16-pin SOIC Lead Free
I
Differential
4th order
delta-sigma
modulator
VD+
13
VA+VREF+
9
VREF-
10
AIN-
8
AIN+
7
Calibration
SRAM
Serial
Interface
Logic
Digital
Filter
XIN
4
XOUT
5
CONV
2
Calibration µC
OSC
CAL
3
6
BP/UP
CS
1
DRDY
16
SDATA
15
SCLK
14
11
GND
12
SEP ‘09
DS125F3
CS5509
2 DS125F3
Notes: 1. Both source resistance and shunt capacitance are critical in determining the CS5509's source
impedance requirements. Refer to the text section Analog Input Impedance Considerations.
2. Specifications guaranteed by design, characterization and/or test.
3. Applies after calibration at the temperature of interest.
4. Total drift over the specified temperature range since calibration at power-up at 25 °C.
5. The input is differential. Therefore, GND ≤ Signal + Common Mode Voltage ≤ VA+.
6. The CS5509 can accept input voltages up to the VA+ analog supply. In unipolar mode the CS5509 will
output all 1's if the dc input magnitude ((AIN+) - (AIN-)) exceeds ((VREF+) - (VREF-)) and will output all
0's if the input becomes more negative than 0 Volts. In bipolar mode the CS5509 will output all 1's if the
dc input magnitude ((AIN+) - (AIN-)) exceeds ((VREF+) - (VREF-)) and will output all 0's if the input
becomes more negative in magnitude than -((VREF+) - (VREF-)).
7. All outputs unloaded. All inputs CMOS levels.
* Refer to the Specification Definitions immediately following the Pin Description Section.
ANALOG CHARACTERISTICS (T
A
= 25 °C; VA+ = 5V ±5%; VD+ = 3.3V ±5%; VREF+ = 2.5V,
VREF- = 0V; f
CLK
= 32.768 kHz; Bipolar Mode; R
source
= 40 Ω with a 10 nF to GND at AIN; AIN- = 2.5V; unless oth-
erwise specified.) (Notes 1 and 2)
Parameter* Min Typ Max Unit
Accuracy
Linearity Error f
CLK
= 32.768 kHz
f
CLK
= 165 kHz
f
CLK
= 247.5 kHz
f
CLK
= 330 kHz
-
-
-
-
0.0015
0.0015
0.0015
0.005
0.003
0.003
0.003
0.0125
± %FS
± %FS
± %FS
± %FS
Differential Nonlinearity - ±0.25 ±0.5 LSB
Full-scale Error (Note 3) - ±0.25 ±2 LSB
Full-scale Drift (Note 4) - ±0.5 - LSB
Unipolar Offset (Note 3) - ±0.5 ±2 LSB
Unipolar Offset Drift (Note 4) - ±0.5 - LSB
Bipolar Offset (Note 3) - ±0.25 ±1 LSB
Bipolar Offset Drift (Note 4) - ±0.25 - LSB
Noise (Referred to Output) - 0.16 -
LSB
rms
Analog Input
Analog Input Range Unipolar
Bipolar (Notes 5 and 6)
-
-
0 to +2.5
±2.5
-
-
V
V
Common Mode Rejection dc
f
CLK
= 32.768 kHz 50, 60 Hz (Note 2)
-
120
105
-
-
-
dB
dB
Input Capacitance - 15 - pF
DC Bias Current (Note 1) - 5 - nA
Power Supplies
DC Power Supply Currents I
Total
I
Analog
I
Digital
-
-
-
350
300
60
450
-
-
µA
µA
µA
Power Dissipation (Note 7) - 1.7 2.25 mW
Power Supply Rejection - 80 - dB
CS5509
DS125F3 3
Notes: 8. All measurements are performed under static conditions.
9. I
out
= -100 µA. This guarantees the ability to drive one TTL load. (V
OH
= 2.4 V at I
out
= -40 µA).
Specifications are subject to change without notice
DYNAMIC CHARACTERISTICS
Parameter Symbol Ratio Unit
Modulator Sampling Frequency
f
s
f
clk
/2
Hz
Output Update Rate (CONV = 1)
f
out
f
clk
/1622
Hz
Filter Corner Frequency
f
-3dB
f
clk
/1928
Hz
Settling Time to 1/2 LSB (FS Step)
t
s
1/f
out
s
5V DIGITAL CHARACTERISTICS (T
A
= 25 °C; VA+, VD+ = 5V ±5%; GND = 0) (Notes 2 and 8)
Parameter Symbol Min Typ Max Unit
High-level Input Voltage XIN
All Pins Except XIN
V
IH
3.5
2.0
-
-
-
-
V
V
Low-level Input Voltage XIN
All Pins Except XIN
V
IL
-
-
-
-
1.5
0.8
V
V
High-level Output Voltage (Note 9)
V
OH
(VD+) -1.0 - - V
Low-level Output Voiltage I
out
= 1.6 mA V
OL
--0.4V
Input Leakage Current
I
in
-±1±10µA
3-State Leakage Current
I
OZ
--±10µA
Digital Output Pin Capacitance
C
out
-9-pF
3.3V DIGITAL CHARACTERISTICS (T
A
= 25 °C; VA+ = 5V ±5%; VD+ = 3.3V ±5%; GND = 0)
(Notes 2 and 8)
Parameter Symbol Min Typ Max Unit
High-level Input Voltage XIN
All Pins Except XIN
V
IH
0.7 VD+
0.6 VD+
-
-
-
-
V
V
Low-level Input Voltage XIN
All Pins Except XIN
V
IL
-
-
-
-
0.3 VD+
0.16 VD+
V
V
High-level Output Voltage (Note 9)
V
OH
(VD+) -0.3 - - V
Low-level Output Voltage I
out
= 1.6 mA V
OL
--0.3V
Input Leakage Current
I
in
-±1±10µA
3-state Leakage Current
I
OZ
--±10µA
Digital Output Pin Capacitance
C
out
-9-pF
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

CS5509-ASZ

Mfr. #:
Buy CS5509-ASZ
Manufacturer:
Cirrus Logic
Description:
Analog to Digital Converters - ADC Single-Supply 16-Bit ADC
Lifecycle:
New from this manufacturer.
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