Analog Devices AD5660 prj Datasheet
3 V/5 V, 16-Bit
J
10 ppm/°C Max On-Chip Reference in SOT-23
nano
DACTM D/A with
Preliminary Technical Data
FEATURES
Low power single 16-bit nanoDAC
12-bit accuracy guaranteed
On-chip 1.25/2.5 V, 10 ppm/°c reference
Tiny 8-lead SOT-23/MSOP package
Power-down to 200 nA @ 5 V, 50 nA @ 3 V
3 V/5 V single power supply
Guaranteed 16-bit monotonic by design
Power-on-reset to zero/midscale
Three power-down functions
Serial interface with Schmitt-triggered inputs
Rail-to-rail operation
SYNC interrupt facility
APPLICATIONS
Processcontrol
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
GENERAL DESCRIPTION
The AD5660 parts are a member of the nanoDAC family of
devices. They are low power, single, 16-bit buffered voltage-out
DACs, guaranteed monotonic by design.
The AD5660x-1 operate from a 3 V single supply featuring an
internal reference of 1.25 V and an internal gain of 2. The
AD5660x-2/3 operate from a 5 V single supply featuring an
internal reference of 2.5 V and an internal gain of 2. Each
reference has a 10 ppm/°C max temperature coefficient. The
reference associated with each part is available at the REFOUT
pin.
The part incorporates a power-on reset circuit that ensures that
the DAC output powers up to 0 V (AD5660x-1/2) or midscale
(AD5660x-3) and remains there until a valid write takes place.
The part contains a power-down feature that reduces the current
consumption of the device to 200 nA at 5 V and provides
software selectable output loads while in power-down mode.
The AD5660 uses a versatile three-wire serial interface that
operates at clock rates up to 30 MHz and is compatible with
standard SPI™, QSPI™, MICROWIRE™ and DSP interface
AD5660
Figure 1.
standards. Its on-chip precision output amplifier allows rail-torail output swing to be achieved.
The low power consumption of this part in normal operation
makes it ideally suited to portable battery operated equipment.
The power consumption is 0.7 mW at 5 V reducing to 1 µW in
power-down mode.
The AD5660 is designed with new technology and is the next
generation to the AD53xx family.
PRODUCT HIGHLIGHTS
1. 16-Bit DAC; 12-Bit Accuracy Guaranteed.
2. On-chip 1.25/2.5 V, 10 ppm/°C max Reference.
3. Available in 8-lead SOT-23 and 8-lead MSOP package.
4. Power-On Reset to 0 V or Midscale.
5. Power-down capability. When powered down, the DAC
typically consumes 50 nA at 3 V and 200n A at 5 V.
6. 10 µS Settling Time.
RELATED DEVICES
Part No. Description
AD5620/AD5640
AD5662
3 V/5 V 12-/14-bit DAC with internal ref in
SOT-23
2.7V to 5.5 V, 16-bit DAC in SOT-23,
external reference
Rev. Pr
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infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
www.analog.com
AD5660 Preliminary Technical Data
TABLE OF CONTENTS
AD5660X-2/3–Specifications ......................................................... 3
AD5660x-1–Specifications.............................................................. 5
Timing Characteristics..................................................................... 7
Pin Configuration and Function Descriptions............................. 8
Absolute Maximum Ratings............................................................ 9
ESD Caution.................................................................................. 9
Terminology .................................................................................... 10
Typical Performance Characteristics ........................................... 11
Theory of Operation ...................................................................... 14
D/A Section................................................................................. 14
Resistor String............................................................................. 14
Output Amplifier........................................................................ 14
REVISION HISTORY
Revision PrJ: Preliminary
Serial Interface............................................................................ 14
SYNC
Interrupt .......................................................................... 15
Power-On Reset .......................................................................... 15
Power-Down Modes .................................................................. 15
Microprocessor Interfacing....................................................... 15
Applications..................................................................................... 17
Using REF19x as a Power Supply for AD5660 ....................... 17
Bipolar Operation Using the AD5660 ..................................... 17
Using AD5660 with an Opto-Isolated Interface..................... 17
Power Supply Bypassing and Grounding................................ 18
Outline Dimensions....................................................................... 19
Ordering Guide .......................................................................... 19
Rev. PrJ Page 2 of 20
Preliminary Technical Data AD5660
AD5660X-2/3–SPECIFICATIONS
VDD = 4.5 V to 5.5 V; RL = 2 kΩ to GND; CL = 200 pF to GND; all specifications T
Table 1.
Parameter A Grade B Grade C Grade Unit
STATIC PERFORMANCE2
Resolution 16 16 16 Bits min
Relative Accuracy ±32 ±16 ±16 LSB max See Figure 4
Differential Nonlinearity ±1 ±1 ±1 LSB max Guaranteed Monotonic by Design. See Figure 5.
Zero Code Error +5 +5 +5 mV typ All Zeroes Loaded to DAC
+20 +20 +20 mV max Register. See Figure 8.
Full-Scale Error −0.15 −0.15 −0.15 % of FSR typ All Ones Loaded to DAC
−1.25 −1.25 −1.25 % of FSR max Register. See Figure 8
Gain Error ±1.25 ±1.25 ±1.25 % of FSR max
Zero Code Error Drift3 ±20 ±20 ±20 µV/°C typ
Gain Temperature Coefficient ±5 ±5 ±5 ppm typ f FSR/°C
OUTPUT CHARACTERISTICS3
Output Voltage Range 0 0 V min
V
V
DD
V
DD
V max
DD
Output Voltage Settling Time 8 8 8 µs typ To ±0.003% FSR 0200H to FD00H
10 10 10 µs max RL = 2 kΩ; 0 pF <CL < 200 pF See Figure 18.
12 12 12 µs typ RL = 2 kΩ; CL = 500 pF
Slew Rate 1 1 1 V/µs typ
Capacitive Load Stability 470 470 470 pF typ RL = ∞
1000 1000 1000 pF typ RL = 2 kΩ
Output Noise 100 100 100 nV/√Hz typ DAC code = 8400H, 10 kHz
Output Drift ppm/°C typ
Digital-to-Analog Glitch Impulse 10 10 10 nV-s typ 1 LSB Change Around Major Carry. See Figure 21.
Digital Feedthrough 0.5 0.5 0.5 nV-s typ
DC Output Impedance 1 1 1 Ω typ
Short Circuit Current 50 50 50 mA typ VDD = 5 V
Power-Up Time 10 10 10 ms typ Coming Out of Power-Down Mode. VDD = 5 V
REFERENCE OUTPUT
Output Voltage
AD5660x-2/3 2.495 2.495 2.495 V min
2.505 2.505 2.505 V max
Reference TC ±25 ±25 ±10 ppm/°C max
LOGIC INPUTS3
Input Current ±1 ±1 ±1 µA max
V
, Input Low Voltage 0.8 0.8 0.8 V max VDD = 5 V
INL
V
, Input High Voltage 2 2 2 V min VDD = 5 V
INH
Pin Capacitance 3 3 3 pF max
MIN
to T
, unless other wise noted.
MAX
B Version
Conditions/Comments
1
Rev. PrJ | Page 3 of 20
AD5660 Preliminary Technical Data
Parameter A Grade B Grade C Grade Unit
B Version
Conditions/Comments
1
POWER REQUIREMENTS
VDD 4.5 4.5 4.5 V min All Digital Inputs at 0 V or VDD
5.5 5.5 5.5 V max DAC Active and Excluding
IDD (Normal Mode) Load Current
VDD = 4.5 V to +5.5 V 0.5 0.5 0.5 mA typ VIH = VDD and VIL = GND
VDD = 4.5 V to +5.5 V 1 1 1 mA max VIH = VDD and VIL = GND
IDD (All Power-Down Modes)
VDD = 4.5 V to +5.5 V 0.2 0.2 0.2 µA typ VIH = VDD and VIL = GND
VDD = 4.5 V to +5.5 V 1 1 1 µA max VIH = VDD and VIL = GND
POWER EFFICIENCY
I
89 89 89 % I
OUT/IDD
= 2 mA, VDD = 5 V
LOAD
1
Temperature ranges are as follows: B Version: -40°C to +105°C, typical at 25°C.
2
Linearity calculated using a reduced code range of 485 to 64714. Output unloaded.
3
Guaranteed by design and characterization, not production tested.
Rev. PrJ Page 4 of 20
Preliminary Technical Data AD5660
AD5660X-1–SPECIFICATIONS
VDD = 2.7 V to 3.6 V; RL = 2 kΩ to GND; CL = 200 pF to GND; all specifications T
Table 2.
Parameter A Grade B Grade C Grade Unit
STATIC PERFORMANCE5
Resolution 16 16 16 Bits min
Relative Accuracy ±32 ±16 ±16 LSB max See Figure 4
Differential Nonlinearity ±1 ±1 ±1 LSB max Guaranteed Monotonic by Design. See Figure 5.
Zero Code Error +5 +5 +5 mV typ All Zeroes Loaded to DAC
+20 +20 +20 mV max Register. See Figure 8.
Full-Scale Error −0.15 −0.15 −0.15 % of FSR typ All Ones Loaded to DAC
−1.25 −1.25 −1.25 % of FSR max Register. See Figure 8.
Gain Error ±1.25 ±1.25 ±1.25 % of FSR max
Zero Code Error Drift6 ±20 ±20 ±20 µV/°C typ
Gain Temperature Coefficient ±5 ±5 ±5 ppm typ of FSR/°C
OUTPUT CHARACTERISTICS3
Output Voltage Range 0 0 V min
V
V
DD
V
DD
V max
DD
Output Voltage Settling Time 8 8 8 µs typ To ±0.003% FSR 0200H to FD00H
10 10 10 µs max RL = 2 kΩ; 0 pF<CL<200 pF See Figure 18.
12 12 12 µs typ RL = 2 kΩ; CL = 500 pF
Slew Rate 1 1 1 V/µs typ
Capacitive Load Stability 470 470 470 pF typ RL = ∞
1000 1000 1000 pF typ RL = 2 kΩ
Output Noise 100 100 100 nV/√Hz typ DAC code = 8400H, 10 kHz
Output Drift tbd ppm/°C typ
Digital-to-Analog Glitch Impulse 10 10 10 nV-s typ 1 LSB Change Around Major Carry. See Figure 21.
Digital Feedthrough 0.5 0.5 0.5 nV-s typ
DC Output Impedance 1 1 1 Ω typ
Short Circuit Current 20 20 20 mA typ VDD = 3 V
Power-Up Time 10 10 10 ms typ Coming Out of Power-Down Mode. VDD = 3 V
REFERENCE OUTPUT
Output Voltage
AD5660x-1 1.248 1.248 1.248 V min
1.252 1.252 1.252 V max
Reference TC ±25 ±25 ±10 ppm/°C max
LOGIC INPUTS3
Input Current ±1 ±1 ±1 µA max
V
, Input Low Voltage 0.8 0.8 0.8 V max VDD = 3 V
INL
V
, Input High Voltage 2 2 2 V min VDD = 3 V
INH
Pin Capacitance 3 3 3 pF max
MIN
to T
, unless other wise noted.
MAX
B Version
Conditions/Comments
4
Rev. PrJ | Page 5 of 20
AD5660 Preliminary Technical Data
Parameter A Grade B Grade C Grade Unit
B Version
Conditions/Comments
4
POWER REQUIREMENTS
VDD 2.7 2.7 2.7 V min All Digital Inputs at 0 V or VDD
3.6 3.6 3.6 V max DAC Active and Excluding
IDD (Normal Mode) Load Current
VDD = 2.7 V to 3.6 V 0.5 0.5 0.5 mA typ VIH = VDD and VIL = GND
VDD = 2.7 V to 3.6 V 1 1 1 mA max VIH = VDD and VIL = GND
IDD (All Power-Down Modes)
VDD = 2.7 V to 3.6 V 0.2 0.2 0.2 µA typ VIH = VDD and VIL = GND
VDD = 2.7 V to 3.6 V 1 1 1 µA max VIH = VDD and VIL = GND
POWER EFFICIENCY
I
I
OUT/IDD
= 2 mA, VDD = 3 V
LOAD
4
Temperature ranges are as follows: B Version: -40°C to +105°C, typical at 25°C.
5
Linearity calculated using a reduced code range of 485 to 64714. Output unloaded.
6
Guaranteed by design and characterization, not production tested.
Rev. PrJ Page 6 of 20
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