CS5012A Datasheet, PDF (1/40 Pages) Cirrus Logic – 16,14 & 12-BIT SELF CALIBRATING A/D CONVERTERS

CS5012A CS5014 CS5016
16-, 14-, & 12-bit Self-calibrating A/D Converters
Features
z Monolithic CMOS A/D Converters
– Microprocessor Compatible
– Parallel & Serial Output
– Inherent Track/Hold Input
z True 12-bit, 14-bit, and 16-bit Precision
z Conversion Times
– CS5016: 16.25 µs
– CS5014: 14.25 µs
– CS5012A: 7.20 µs
z Linearity Error: ±0.001% FS
– Guaranteed No Missing Codes
z Self-calibration Maintains Accuracy
– Accurate Over Time & Temperature
z Low Power Consumption
– 150 mW
z Low Distortion
I
Description
The CS5012A/14/16 are 12-, 14-, and 16-bit mono-
lithic analog to digital converters with conversion
times of 7.2 µs, 14.25 µs and 16.25 µs. Unique self-
calibration circuitry ensures excellent linearity and
differential nonlinearity, with no missing codes. Off-
set and full-scale errors are kept within 1/2 LSB
(CS5012A/14) and 1 LSB (CS5016), eliminating the
need for calibration. Unipolar and bipolar input
ranges are digitally selectable.
The pin compatible CS5012A/14/16 consist of a
DAC, conversion and calibration microcontroller,
oscillator, comparator, microprocessor-compatible
3-state I/O, and calibration circuitry. The input
track-and-hold, inherent to the devices’ sampling
architecture, acquires the input signal after each
conversion using a fast-slewing, on-chip buffer am-
plifier. This allows throughput rates up to
100 kSps(CS5012A), 56 kSps (CS5014), and
50 kSps (CS5016).
ORDERING INFORMATION
See “Ordering Information” on page39.
HOLD CS RD A0 BP/UP RST BW INTRLV CAL EOT EOC SCLK SDATA
1 24 25 26 27 36 37 38 39 41 42 43 44
CLKIN ²³
REFBUF ³²
VREF ³¹
AIN ²⁹
AGND ³⁰
Clock
Generator
Control
-
Calibration
Memory
Microcontroller
+
-
Charge
+
Redistribution
-
DAC
+
-
Comparator
+
Status Register
28
34
12
40
11
35
VA+
VA-
VD+
VD-
DGND
TST
2
D0 (LSB) CS5016
3
D1
4
5
D2 (LSB) CS5014
6
D3
D4 (LSB) CS5012A
7
8 ^D5
D6
10
14 ^D7
D8
16
17 ^D9
18 ^D10
D11
19
20
D12
D13
21
22 ^D14
D15 (MSB)
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Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved)
AUG ‘05
DS14F9