CS5101A_06 Datasheet, PDF (1/39 Pages) Cirrus Logic – 16-bit, 100 kSps / 20 kSps A/D Converters

CS5101A
CS5102A
16-bit, 100 kSps / 20 kSps A/D Converters
Features
z Monolithic CMOS A/D Converters
– Inherent Sampling Architecture
– 2-channel Input Multiplexer
– Flexible Serial Output Port
z Ultra-low Distortion
– S/(N+D): 92 dB
– TDH: 0.001%
z Conversion Time
– CS5101A: 8µs
– CS5102A: 40 µs
z Linearity Error: ±0.001% FS
– Guaranteed No Missing Codes
z Self-calibration Maintains Accuracy
– Accurate Over Time & Temperature
z Low Power Consumption
– CS5101A: 320 mW
– CS5102A: 44 mW
I
Description
The CS5101A and CS5102A are 16-bit monolithic
CMOS analog-to-digital converters (ADCs) capable of
100 kSps (5101A) and 20 kSps (5102A) throughput. The
CS5102A’s low power consumption of 44mW, coupled
with a power-down mode, makes it particularly suitable
for battery-powered operation.
On-chip self-calibration circuitry achieves nonlinearity of
±0.001% of FS and guarantees 16-bit, no missing codes
over the entire specified temperature range. Superior lin-
earity also leads to 92 dB S/(N+D) with harmonics below
-100 dB. Offset and full-scale errors are minimized dur-
ing the calibration cycle, eliminating the need for external
trimming.
The CS5101A and CS5102A each consist of a 2-chan-
nel input multiplexer, DAC, conversion and calibration
microcontroller, clock generator, comparator, and serial
communications port. The inherent sampling architec-
ture of the device eliminates the need for an external
track-and-hold amplifier.
The converters’ 16-bit data is output in serial form with
either binary or two’s complement coding. Three output
timing modes are available for easy interfacing to micro-
controllers and shift registers. Unipolar and bipolar input
ranges are digitally selectable
ORDERING INFORMATION
See “Ordering Information” on page 38.
HOLD SLEEPRST STBY CODE BP/UP CRS/FIN TRK1 TRK2 SSH/SDLSDATA
12 28 2 5 16 17
10
89
11
15
CLKIN ³
XOUT ⁴
REFBUF ²¹
VREF ²⁰
AIN1 ¹⁹
AIN2 ²⁴
CH1/2 ¹³
AGND ²²
Clock
Generator
-
+
Control
Calibration
SRAM
Microcontroller
-
+
-
+
25
VA+
16-Bit Charge
Redistribution
DAC
23
VA-
6
1
DGND
VD-
-
+
Comparator
7
VD+
14
SCLK
26
TEST
27
SCKMOD
18
OUTMOD
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Copyright © Cirrus Logic, Inc. 2006
(All Rights Reserved)
JAN ‘06
DS45F6