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NXP Semiconductors Electronic Components Datasheet

PCA9691 Datasheet

8-bit A/D and D/A converter

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PCA9691
8-bit A/D and D/A converter
Rev. 02 — 27 January 2010
Product data sheet
1. General description
The PCA9691 is a single chip, single supply, low power, 8-bit CMOS1 data acquisition
device with four analog inputs, one analog output and a serial I2C-bus interface. Three
address pins (A0, A1, and A2) are used for programming the hardware address, allowing
the use of up to 64 PCA9691 devices connected to the I2C-bus without additional
hardware. Address, control and data to and from the PCA9691 are transferred via the
serial two-line bidirectional I2C-bus.
The functions of the PCA9691 include:
Analog input multiplexing
On-chip sample and hold
8-bit Analog-to-Digital (A/D) conversion
8-bit Digital-to-Analog (D/A) conversion
The maximum conversion rate is given by the maximum frequency of the I2C-bus.
2. Features
„ 8-bit successive approximation A/D conversion
„ Four analog inputs programmable as single-ended or differential inputs
„ 64 different addresses by three hardware address pins
„ 1 MHz Fast-mode Plus (Fm+) I2C-bus via serial input/output
„ Sampling rate given by I2C-bus frequency
„ Single supply voltage; operating from 2.5 V to 5.5 V
„ Low standby current
„ Analog voltage from VSS to VDD
„ Multiplying Digital-to-Analog Converter (DAC) with one analog output
„ On-chip sample and hold circuit
„ Auto-incremented channel selection
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 14.


NXP Semiconductors Electronic Components Datasheet

PCA9691 Datasheet

8-bit A/D and D/A converter

No Preview Available !

NXP Semiconductors
PCA9691
8-bit A/D and D/A converter
3. Ordering information
Table 1. Ordering information
Type number Package
Name
Description
PCA9691BS HVQFN16 plastic thermal enhanced very thin quad flat package;
no leads; 16 terminals; body 4 × 4 × 0.85 mm
PCA9691TS TSSOP16 plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
PCA9691T SO16
plastic small outline package; 16 leads; body width
7.5 mm
Version
SOT629-1
SOT403-1
SOT162-1
4. Marking
Table 2. Marking codes
Type number
PCA9691BS
PCA9691TS
PCA9691T
Marking code
9691
PCA9691
PCA9691T
5. Block diagram
SCL
SDA
A0
A1
A2
EXT
VDD
VSS
OSC
AIN0
AIN1
AIN2
AIN3
AOUT
I2C-BUS
INTERFACE
PCA9691
POWER-ON
RESET
OSCILLATOR
ANALOG
MULTIPLEXER
SAMPLE
AND
HOLD
SAMPLE
AND
HOLD
Fig 1. Block diagram of PCA9691
STATUS
DAC DATA ADC DATA
REGISTER REGISTER REGISTER
CONTROL
LOGIC
COMPARATOR
SUCCESSIVE
APPROXIMATION
REGISTER
AND
LOGIC
8
DAC
VREF
AGND
001aag462
PCA9691_2
Product data sheet
Rev. 02 — 27 January 2010
© NXP B.V. 2010. All rights reserved.
2 of 31


Part Number PCA9691
Description 8-bit A/D and D/A converter
Maker NXP
Total Page 30 Pages
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