Data Sheet ADuCM310
Rev. A Page 3 of 27
GENERAL DESCRIPTION
The ADuCM310 is a multidie stack, on-chip system designed
for diagnostic control of tunable laser optical module applications.
The ADuCM310 features a 16-bit (14-bit accurate) multichannel
successive approximation register (SAR) ADC, an ARM
Cortex™-M3 processor, eight voltage DACs (VDACs), six
current output DACs, and Flash/EE memory packaged in a
6 mm × 6 mm, 112-ball CSP_BGA package.
The bottom die in the stack supports the bulk of the low voltage
analog circuitry and is the largest of the three die. It contains
the ADC, VDACs, main IDAC circuits, as well as other analog
support circuits, such as the low drift precision 2.5 V voltage
reference source.
The middle die in the stack supports the bulk of the digital
circuitry, including the ARM Cortex-M3 processor, the flash
and SRAM blocks, and all of the digital communication
peripherals. In addition, this die provides the clock sources for
the whole chip. A 16 MHz internal oscillator is the source of the
internal PLL that outputs an 80 MHz system clock.
The top die, which is the smallest die, was developed on a high
voltage process, and this die supports the −5 V and +5 V VDAC
outputs. It also implements the SOA IDAC current sink circuit
that allows the external SOA diode to pull to a −3.0 V level to
implement the fast shutdown of the laser output.
Regarding the individual blocks, the ADC is capable of
operating at conversion rates up to 800 kSPS. There are
10 external inputs to the ADC, which can be single ended or
differential. Several internal channels are included, such as the
supply monitor channels, an on-chip temperature sensor, and
internal voltage reference monitors.
The VDACs are 12-bit string DACs with output buffers capable
of sourcing between 10 mA and 50 mA, and these DACs are all
capable of driving 10 nF capacitive loads.
The low drift current DACs have 14-bit resolution and varied
full-scale output ranges from 0 mA to 20 mA to 0 mA to
250 mA on the SOA IDAC (IDAC3). The SOA IDAC also
comes with a 0 mA to −80 mA current sink capability.
A precision 2.5 V on-chip reference source is available. The internal
ADC, IDACs, and VDAC circuits use this on-chip reference
source to ensure low drift performance for all of these peripherals
The ADuCM310 also provides 2× buffered reference outputs
capable of sourcing up to 1.2 mA. These outputs can be used
externally to the chip.
The ADuCM310 integrates an 80 MHz ARM Cortex-M3
processor. It is a 32-bit reduced instruction set computer (RISC)
machine, offering up to 100 DMIPS peak performance. The ARM
Cortex-M3 processor also has a flexible 14-channel direct
memory access (DMA) controller supporting serial peripheral
interface (SPI), UART, and I
2
C communication peripherals. The
ADuCM310 has 256 kB of nonvolatile Flash/EE memory and
32 kB of SRAM integrated on-chip.
A 16 MHz on-chip oscillator generates the 80 MHz system
clock. This clock internally divides to allow the processor to
operate at lower frequency, thus saving power. A low power
internal 32 kHz oscillator is available and can clock the timers.
The ADuCM310 includes three general-purpose timers, a
wake-up timer (which can be used as a general-purpose timer),
and a system watchdog timer.
A range of communication peripherals can be configured as
required in a specific application. These peripherals include
UA RT, 2 × I
2
C, 2 × SPI, GPIO ports, and pulse-width
modulation (PWM).
On-chip factory firmware supports in-circuit serial download via
the UART, while nonintrusive emulation and program download
are supported via the serial wire debug port (SW-DP) interface.
These features are supported on the EVA L-ADuCM310QSPZ
development system.
The ADuCM310 operates from 2.9 V to 3.6 V and is specified
over a temperature range of −10°C to +85°C.
Note that, throughout this data sheet, multifunction pins, such
as P1.0/SIN/ECLKIN/PLAI[4], are referred to either by the
entire pin name or by a single function of the pin, for example,
P1.0, when only that function is relevant.
For additional information on the ADuCM310, see the
ADuCM310 reference manual, How to Set Up and Use the
ADuCM310.
