HMXADC9225NYG - Honeywell - Microelectronics & Precision Sensors

HMXADC9225

Radiation Hardened 12-Bit, 20 MSPS

Monolithic A/D Converter

The HMXADC9225 is a radiation hardened monolithic, single supply, 12-bit, 20 MSPS,

analog-to-digital converter with an on-chip, high performance sample-and-hold

ampliﬁer. The HMXADC9225 uses a multistage differential pipelined architecture with

output error correction logic to provide 12-bit accuracy at 20 MSPS data rates, and

guarantees no missing codes over the full operating temperature range.

Features

n Monolithic 12-Bit, 20 MSPS

A/D Converter

n Rad Hard: >500k Rad(Si) Total Dose

n Single +5 V Analog Supply

n Complete On-Chip S/H Ampliﬁer

n Straight Binary Output Data

n 5V or 3.3V Digital and I/O Supply

n No Missing Codes Guaranteed

n Differential Nonlinearity Error: 0.4 LSB

n Signal-to-Noise and Distortion

Ratio: 69.6 dB

n Spurious-Free Dynamic Range: –81 dB

n 28-Lead Ceramic Flat Pack

Mixed Signal Rad Hard Process

The HMXADC9225 is fabricated on

space qualiﬁed SOI CMOS process.

High-speed precision analog circuits

are now combined with high-density

logic circuits that can reliably withstand

the harshest environments.

Space Qualiﬁed Package

The HMXADC9225 is packaged in

a 28 lead ceramic ﬂat pack.

Low Power

The HMXADC9225 at 335 mW

consumes a fraction of the power

of presently available in existing

monolithic solutions.

Output Enable (OE)

The OE input allows user to put the

tri-state digital outputs into a high

impedance mode.

Dual Power Supply Capability

The HMXADC9225 uses a single

+5 V power supply simplifying system

power supply design. It also features

a separate digital I/O power supply

line to accommodate 3.3V and

5V logic families.

On-Chip Sample-and-Hold (SHA)

The versatile SHA input can be

conﬁgured for either single-ended

or differential inputs.

The HMXADC9225 is fabricated on a radiation hardened SOI-IV Silicon On Insulator (SOI)

process with very low power consumption.

The input of the HMXADC9225 allows for easy interfacing to space and military imaging,

sensor, and communications systems. With a truly differential input structure, the user can

select a variety of input ranges and offsets including single-ended applications. The dynamic

performance is excellent.

The sample-and-hold ampliﬁer (SHA) is well suited for both multiplexed systems that switch

full-scale voltage levels in successive channels and sampling single-channel inputs at

frequencies up to and well beyond the Nyquist rate.

A single clock input is used to control all internal conversion cycles. The digital output data is

presented in straight binary output format.

Pin Pin Name Description

1 CLK Clock Input

2 BIT 12 Least Signiﬁcant Data Bit (LSB)

3-12 BIT 11 – 2 Data Output Bit

13 BIT 1 Most Signiﬁcant Bit (MSB)

14 OE Output Enable (high active)

15 AVDD +5V Analog Supply

16 AVSS Analog Ground

17 RBIAS Reference Current Bias Resistor

18 VREF INPUT Reference Voltage Input

19 REFCOMM Reference Common

20 REFB Noise Reduction Pin

21 REFT Noise Reduction Pin

22 CML Common Mode Level (AVDD/2)

23 VINA Analog Input (+)

24 VINB Analog Input (-)

25 AVSS Analog Ground

26 AVDD +5V Analog Supply

27 DRVSS Digital Output Driver Ground

28 DRDVDD +5V or 3.3V Digital Output Driver Supply

Pin Description

Block Diagram

S/H MDAC1

X16

MDAC2

MDAC3

A/D A/D A/D A/D

REFP, REFN

VINP

VINN

Clock In

CML

Clock

Buffer

CML

Gen

AVDD

AVSS

REFCOM RBIAS VREFVREF

IREF

Master Bias

Correct

Logic

Data

Output

Drivers

Output

Tri-State

Control

DRVDD DRVSS

D0-D11

Output

Enable

REFT

REFB

External

Reference

Input

5334

–

Diff

Buffer

Cap*

0.1uF 0.1uF

* = 0.1F in parallel

with a 10uF

5kΩ

CLK

BIT 12 (LSB)

BIT 11

BIT 10

BIT 9

BIT 8

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1 (MSB)

DRVDD

DRVSS

AVDD

AVSS

VIN B

VIN A

CML

REFT

REFB

REFCOM

VREF IN

RBIAS

AVSS

AVDD

Signal Deﬁnition

DRVDD

The Digital Output Power Supply (DRVDD) can operate at either 5.0V

or 3.3V. The DRVDD voltage deﬁnes the interface voltage level for

all the digital I/O signals including Clock input, Output Enable, and all

data output signals.

Output Enable (OE)

This signal controls the electrical state of the digital output drivers.

A high logic level will enable the outputs and a low logic level will put

the output drivers into a high impedance state.

RBIAS

R-Bias is required to create the internal bias currents. An external

resistor with a value of 5kΩ shall be connected between pin 17 and

ground.

The R-Bias resistor can also be used to change the power

consumption. By changing the resistor value, the current

consumption can be changed. The range of this feature not yet

characterized.

Voltage Reference Input

The HMXADC9225 requires the user to provide an external voltage

reference as an INPUT to the device. The device is designed to

operate using a 1.0V to 2.0V external voltage reference. The input

range will then be deﬁned by the VREF.

The full scale signal input = 2 x VREF. Signals outside this range will

be considered “out of range”.

CML (Common Mode Level)

This signal is an analog output at a value of AVDD/2. It can be used

as a reference for biasing external circuits to a “mid-rail” value. This

signal should be decoupled with a 0.1uF capacitor.

Total Ionizing Radiation Dose

The HMXADC9225 will meet all stated functional and electrical

speciﬁcations over the entire operating temperature range after

the speciﬁed total ionizing radiation dose. All electrical and timing

performance parameters will remain within speciﬁcations after

rebound at VDD = 5.0 V extrapolated to ten years of operation. Total

dose hardness is assured by wafer level testing of process monitor

transistors using 10 KeV X-ray and Co60 radiation sources. Transistor

gate threshold shift correlations have been made between 10 KeV

X-rays applied at a dose rate of 1x105 rad(SiO2)/min at T=25°C and

gamma rays (Cobalt 60 source) to ensure that wafer level X-ray

testing is consistent with standard military radiation test environments.

Transient Pulse Ionizing Radiation

The HMXADC9225 will meet any functional or electrical speciﬁcation

after exposure to a radiation pulse up to the transient dose rate

survivability speciﬁcation, when applied under recommended

operating conditions. Note that the current conducted during the

pulse by the ADC inputs, outputs, and power supply may signiﬁcantly

exceed the normal operating levels. The application design must

accommodate these effects.

Soft Error Rate

The HMXADC9225 is not guaranteed to operate through an SEU

or dose rate event, but it will recover and continue to meet all

speciﬁcations over the full temperature range after an event.

Latchup and Snapback

The HMXADC9225 will not latch up due to any of the above radiation

exposure conditions when applied under recommended operating

conditions. Fabrication with the SIMOX substrate material provides

oxide isolation between adjacent PMOS and NMOS transistors and

eliminates any potential SCR latchup structures. Sufﬁcient transistor

body tie connections to the p- and n-channel substrates are made to

ensure no source/drain snapback occurs.

Radiation Performance Analog

Sampling Timing Diagram

S1 S2

S3 S4

tCH tCL

tOD

Data 1

Analog Input

Clock

Data Out

Parameters Min Max Units

Total Dose Hardness >5 x 105 Rad (Si)

Dose Rate Upset Hardness >2.5 x 1012 Rad(Si)/sec

Dose Rate Survivability >2.5 x 1012 Rad(Si)/sec

Soft Error Rate LET (1) 120 MeV cm2/mg

Soft Error Rate (2) <1x10-10 Upsets/bit-day

Latch Up Immune

Output Enable Timing Diagram

Switching Speciﬁcations

(TMIN to TMAX with AVDD = +5V, DRVDD = +5V, CL = 85 pF)

Parameter Symbol Min Typ Max Units

Clock Period (1) tC 50 ns

Clock Pulsewidth High (46% of tC) (1) tCH 23 ns

Output Delay tOD 3 25 ns

High Z to Output High (DRVDD=5V) (2) TDZH_50 25 ns

High Z to Output Low (DRVDD=5V) (2) TDZL_50 25 ns

Output High to High Z (DRVDD=5V) (2) TDHZ_50 25 ns

Output Low to High Z (DRVDD=5V) (2) TDLZ_50 25 ns

High Z to Output High (DRVDD=3.3V) (2) TDZH_33 25 ns

High Z to Output Low (DRVDD=3.3V) (2) TDZL_33 25 ns

Output High to High Z (DRVDD=3.3V) (2) TDHZ_33 25 ns

Output Low to High Z (DRVDD=3.3V) (2) TDLZ_33 25 ns

Radiation Speciﬁcations

(TMIN to TMAX with AVDD = +5V, DRVDD = +5V, CL = 20 pF)

(1) These are parameters of the input clock signal to the chip.

(2) Refer to “Output Enable Timing Diagram” for waveform and loading.

(1) The HMXADC9225 will recover and continue to meet all speciﬁcations.

(2) This error rate applies to only the logic portion of the device.

OE 50Ω

D1-D12

TDLZ

TDHZ

TDLZ

TDHZ

85pF

(a) (b)

Output Enable Timing Diagram (a) and Effective Load (b)

Absolute Maximum Ratings

(AVDD = +5V, DRVDD = +5V, unless otherwise noted)

Parameters Min Max Units

AVDD 6.5 Volts

DRVDD 6.5 Volts

AVSS -0.3 Volts

DRVSS -0.3 Volts

REFGND -0.3 Volts

CLK, OE 6.5 Volts

D1-D12 6.5 Volts

VINA, VINB 6.5 Volts

VREF 6.5 Volts

REFT, REFB 6.5 Volts

Package Thermal Resistance (θJC) 2.0 °C/W

Junction Temperature +175 °C

(1) All voltages are with respect to VSS = 0V.

Parameters Min Type Max Units

AVDD 4.75 5 5.25 Volts

DRVDD (for 5V I/O operation) 4.75 5 5.25 Volts

DRVDD (for 3.3V I/O operation) 3.0 3.3 3.6 Volts

AVSS -0.3 0 Volts

DRVSS -0.3 0 Volts

REFGND -0.3 0 Volts

CLK, OE DRVDD + 0.5 Volts

D1-D12 5.5 Volts

VINA, VINB 0.5 4.5 Volts

VREF 1.0 2.0 Volts

REFT, REFB 5.5 Volts

Operating Temperature (case) -55 +125 °C

Recommended Operating Conditions

(1) All voltages are with respect to VSS = 0V.

ESD (Electrostatic Discharge) Sensitive

The HMXADC9225 is rated as Class 1B ESD. Proper ESD precautions should be taken to

avoid degradation or damage to the device.

DC Speciﬁcations

(AVDD = +5V, DRVDD = +5V, fSAMPLE = 20 MSPS, VREF 2.0V, VINB = 2.5V dc, TMIN to TMAX unless otherwise noted)

Parameter Symbol Min Typ Max Units

Resolution (1) 12 Bits

Max Conversion Rate (1) 20 MHz

Input Referred Noise

VREF = 2V (1) 0.17 LSB rms

Accuracy

Integral Nonlinearity INL -2.5 ±1.2 2.5 LSB

Differential Nonlinearity DNL -1.0 ±0.4 1.0 LSB

No Missing Codes (1) 12 Bits guaranteed

Zero Error (@ 25°C) OFFSET -0.9 ±0.3 0.9 % FSR

Gain Error (@ 25°C) GAIN -2 ±0.5 2 % FSR

Temperature Drift

Zero Error (@ 25°C) (1) +/- 2 PPM/°C

Gain Error (@ 25°C) (1) +/- 26 PPM/°C

Analog Input

Input Span 4 V p-p

Input Capacitance (1) 10 pF

External Voltage Reference

Input Voltage (2) 1.0 2.0 2.0 V

Input Current 250 500 μA

Power Supply Currents

IAVDD, IDVDD 65 mA

IDRVDD 2 mA

CML Output Current (3) 0.5 1.0 mA

RBIAS Resistor Value 5 KΩ

(1) Guaranteed but not tested.

(2) Recommended VREF tolerance is +/-110 mV.

(3) It is recommended an external buffer be used for driving external circuitry.

Parameter Symbol Min Typ Max Units

Signal to Noise and Distortion fIN = 1MHz SINAD1 63 67 - dB

Signal to Noise and Distortion fIN = 5MHz SINAD5 60 66 - dB

Signal to Noise Ratio fIN = 1MHz SNR1 63 69 - dB

Signal to Noise Ratio fIN = 5MHz SNR5 60 68 - dB

Total Harmonic Distortion fIN = 1MHz THD1 - -70 -66 dB

Total Harmonic Distortion fIN = 5MHz THD5 - -69 -66 dB

Spurious Free Dynamic Range fIN = 1MHz SFDR1 70 72 - dB

Spurious Free Dynamic Range fIN = 5MHz SFDR5 68 71 - dB

Full Power Bandwidth (1) 120 MHz

Small Signal Bandwidth (1) 120 MHz

Aperture Delay (1) 1 ns

Aperture Jitter (1) 4 ps rms

Acquisition to Full Scale Step (1) 10 ns

AC Speciﬁcations

(AVDD = +5V, DRVDD = +5V, fSAMPLE = 20 MSPS, VREF 2.0V, TMIN to TMAX Differential Input unless otherwise noted)

(1) Guaranteed but not tested.

Digital Speciﬁcations

(AVDD = +5V, DRVDD = +5V, unless otherwise noted)

Parameter Symbol Min Typ Max Units

Logic Inputs (CLK, OE)

High Level Input Voltage (DRVDD = +5V) VIH_50 3.5 V

High Level Input Voltage (DRVDD =+3.3V) VIH_33 2.3 V

Low Level Input Voltage (DRVDD = +5V) VIL_50 1.0 V

Low Level Input Voltage (DRVDD = +3.3V) VIL_33 1.0 V

High Level Input Current (DRVDD=5V, VIN=5V) IIH_50 -10 10 μA

Low Level Input Current (DRVDD=5V, VIN=0V) IIL_50 -10 10 μA

High Level Input Current (DRVDD=3.3V, VIN=3.3V) IIH_33 -10 10 μA

Low Level Input Current (DRVDD=3.3V, VIN=0V) IIL_33 -10 10 μA

Input Capacitance (1) CIN 5 pF

Logic Outputs (D1-D12 with DRVDD = +5V)

High Level Output Voltage(IOH = 50μA) VOH1_50 4.5 V

High Level Output Voltage(IOH = 0.5mA) VOH2_50 2.4 V

Low Level Output Voltage(IOL = 1.6mA) VOL2_50 0.4 V

Low Level Output Voltage(IOL = 50μA) VOL1_50 0.1 V

High Z Output Current (DRVDD=5V, OE=0V, VOUT=5V) IOZH_50 -10 10 μA

High Z Output Current (DRVDD=5V, OE=0v, VOUT=0V) IOZL_50 -10 10 μA

Logic Outputs (D1-D12 with DRVDD = +3.3V)

High Level Output Voltage(IOH = 50μA) VOH1_33 2.95 V

High Level Output Voltage(IOH = 0.5mA) VOH2_33 2.80 V

Low Level Output Voltage(IOL = 1.6mA) VOL2_33 0.4 V

High Z Output Current (DRVDD=3.3V, VOE=0V, VOUT=3.3V) IOZH_33 -10 10 μA

High Z Output Current (DRVDD=3.3V, VOE=0V, VOUT=0V) IOZL_33 -10 10 μA

Output Capacitance (1) COUT 5 pF

(1) Guaranteed but not tested.

Deﬁnitions of Speciﬁcations

Integral Nonlinearity (INL)

INL refers to the deviation of each individual code from a line drawn

from “negative full scale” through “positive full scale.” The point used

as “negative full scale” occurs 1/2 LSB before the ﬁrst code transition.

“Positive full scale” is deﬁned as a level 1 1/2 LSB beyond the last

code transition. The deviation is measured from the middle of each

particular code to the true straight line.

Differential Nonlinearity (DNL, No Missing Codes)

An ideal ADC exhibits code transitions that are exactly 1 LSB apart.

DNL is the deviation from this ideal value. Guaranteed no missing

codes to 12-bit resolution indicate that all 4096 codes, respectively,

must be present over all operating ranges.

Zero Error

The major carry transition should occur for an analog value 1/2 LSB

below VINA = VINB. Zero error is deﬁned as the deviation of the

actual transition from that point.

Gain Error

The ﬁrst code transition should occur at an analog value 1/2 LSB

above negative full scale. The last transition should occur at an analog

value 1 1/2 LSB below the nominal full scale.

Gain error is the deviation of the actual difference between ﬁrst and

last code transitions and the ideal difference between ﬁrst and last

code transitions.

Temperature Drift

The temperature drift for zero error and gain error speciﬁes the

maximum change from the initial (+25°C) value to the value at TMIN

or TMAX.

Aperature Drift

Aperture jitter is the variation in aperture delay for successive samples

and is manifested as noise on the input to the A/D.

Aperature Delay

Aperture delay is a measure of the sample-and-hold ampliﬁer (SHA)

performance and is measured from the rising edge of the clock input

to when the input signal is held for conversion.

Signal-to-Noise and Distortion (S/N+D, SINAD) Ratio

S/N+D is the ratio of the rms value of the measured input signal to

the rms sum of all other spectral components below the Nyquist

frequency, including harmonics but excluding dc. The value for S/

N+D is expressed in decibels.

Effective Number of Bits (ENOB)

For a sine wave, SINAD can be expressed in terms of the number of

bits. Using the following formula,

N = (SINAD – 1.76)/6.02

it is possible to get a measure of performance expressed as N, the

effective number of bits. Thus, effective number of bits for a device for

sine wave inputs at a given input frequency can be calculated directly

from its measured SINAD.

Total Harmonic Distortion (THD)

THD is the ratio of the rms sum of the ﬁrst six harmonic components

to the rms value of the measured input signal and is expressed as a

percentage or in decibels.

Signal-to-Noise Ratio (SNR)

SNR is the ratio of the rms value of the measured input signal to

the rms sum of all other spectral components below the Nyquist

frequency, excluding the ﬁrst six harmonics and dc. The value for

SNR is expressed in decibels.

Spurious Free Dynamic Range (SFDR)

SFDR is the difference in dB between the rms amplitude of the input

signal and the peak spurious signal.

Typical DNL (10MSPS) Typical INL (10MSPS)

Functional Description

The HMXADC9225 is a complete high performance single-supply

12-bit ADC. The analog input range of the HMXADC9225 is highly

ﬂexible allowing for either single-ended or differential inputs of varying

amplitudes that can be AC or DC coupled.

It utilizes four-stage pipeline architecture with a wideband input

sample-and-hold ampliﬁer (SHA) implemented on an SOI CMOS

process. Each stage of the pipeline, excluding the last stage, consists

of a low-resolution ﬂash A/D connected to a switched capacitor

DAC and interstage residue ampliﬁer (MDAC). The residue ampliﬁer

ampliﬁes the difference between the reconstructed DAC output

and the ﬂash input for the next stage in the pipeline. One bit of

redundancy is used in each of the stages to facilitate digital correction

of ﬂash errors. The last stage simply consists of a ﬂash A/D.

The pipeline architecture allows a greater throughput rate at the

expense of pipeline delay or latency. This means that while the

converter is capable of capturing a new input sample every clock

cycle, it actually takes three clock cycles for the conversion to be fully

processed and appear at the output. This latency is not a concern in

most applications. The digital output is latched into an output buffer

to drive the output pins.

The HMXADC9225 uses both edges of the clock in its internal timing

circuitry (see Timing Diagram and speciﬁcation page for exact timing

requirements). The A/D samples the analog input on the rising edge

of the clock input. During the clock low time (between the falling edge

and rising edge of the clock), the input SHA is in the sample mode;

during the clock high time it is in hold. System disturbances just prior

to the rising edge of the clock and/or excessive clock jitter may cause

the input SHA to acquire the wrong value, and should be minimized.

Analog Input Operation

Figure 1 shows the equivalent analog input of the HMXADC9225,

which consists of a differential sample-and-hold ampliﬁer (SHA). The

differential input structure of the SHA is highly ﬂexible, allowing the

devices to be easily conﬁgured for either a differential or single-ended

input. The dc offset, or common mode voltage, of the input(s) can

be set to accommodate either single-supply or dual-supply systems.

Also, note that the analog inputs, VINA and VINB, are interchangeable

with the exception that reversing the inputs to the VINA and VINB

pins results in a polarity inversion.

Figure 1 – Analog Input Equivalent Circuit

The full scale signal input = 2 x VREF.

Digital Outputs

The HMXADC9225 output data is presented in positive true straight

binary for all input ranges. The table below indicates the output data

formats for various input ranges regardless of the selected input

range. A twos complement output data format can be created by

inverting the MSB. The outputs can be placed in high impedance

tri-state mode and are controlled by the Output Enable (OE) signal.

Output Data Format

Clock Input and Considerations

The HMX9225 internal timing uses the two edges of the clock input

to generate a variety of internal timing signals. The clock input must

meet or exceed the minimum speciﬁed pulse width high and low (tCH

and tCL) speciﬁcations for the given A/D as deﬁned in the Switching

Speciﬁcations at the beginning of the data sheet to meet the rated

performance speciﬁcations.

For example, the clock input to the HMX9225 operating at 20 MSPS

may have a duty cycle between 45% to 55% to meet this timing

requirement since the minimum speciﬁed tCH and tCL is 23 ns. For low

clock rates, the duty cycle may deviate from this range to the extent

that both tCH and tCL are satisﬁed.

All high-speed high resolution A/Ds are sensitive to the quality of

the clock input. The degradation in SNR at a given full-scale input

frequency (fIN) due to only aperture jitter (tA) can be calculated with

the following equation:

In the equation, the rms aperture jitter, tA, represents the root sum

square of all the jitter sources, which include the clock input, analog

input signal, and A/D aperture jitter speciﬁcation. Under sampling

applications are particularly sensitive to jitter.

Clock input should be treated as an analog signal in cases where

aperture jitter may affect the dynamic range of the HMXADC9225.

Power supplies for clock drivers should be separated from the A/D

output driver supplies to avoid modulating the clock signal with

digital noise. Low jitter crystal controlled oscillators make the best

clock sources. If the clock is generated from another type of source

(by gating, dividing, or other method), it should be retimed by the

original clock at the last step. The clock input is referred to the analog

supply. Its logic threshold is AVDD/2.

The HMXADC9225 has a clock tolerance of 5% at 20 MHz and

should be a 50% duty cycle.

The input circuitry for the CLOCK pin is designed to accommodate

CMOS inputs. The quality of the logic input, particularly the rising

edge, is critical in realizing the best possible jitter performance of the

part: the faster the rising edge, the better the jitter performance.

As a result, careful selection of the logic family for the clock driver, as

well as the fanout and capacitive load on the clock line, is important.

Jitter-induced errors become more predominant at higher frequency,

large amplitude inputs, where the input slew rate is greatest.

Most of the power dissipated by the HMX9225 is from the analog

power supplies. However, lower clock speeds will reduce digital

current.

Input (V) Condition (V) Digital Output

VINA-VINB < - VREF 0000 0000 0000

VINA-VINB = - VREF 0000 0000 0000

VINA-VINB = 0 1000 0000 0000

VINA-VINB = + VREF – 1 LSB 1111 1111 1111

VINA-VINB > + VREF 1111 1111 1111

Digital Output Driver Considerations (DRVDD)

The HMX9225 output drivers shall be operated at 5.0 volts or

at 3.3 volts. The output drivers are sized to provide sufﬁcient output

current to drive a wide variety of logic families. However, large drive

currents tend to cause glitches on the supplies and may affect

SINAD performance. Applications requiring the ADC to drive large

capacitive loads or large fanout may require additional decoupling

capacitors on DRVDD. In extreme cases, external buffers or latches

may be required.

VIN A

VIN B

–

SNR = 20 log10

2p ƒIN tA

Grounding and Decoupling

Analog and Digital Grounding

Proper grounding is essential in any high speed, high-resolution

system. Multilayer printed circuit boards (PCBs) are recommended to

provide optimal grounding and power schemes. The use of ground

and power planes offers distinct advantages:

1. The minimization of the loop area encompassed by a signal

and its return path.

2. The minimization of the impedance associated with ground

and power paths.

3. The inherent distributed capacitor formed by the power plane,

PCB insulation and ground plane.

These characteristics result in both a reduction of electromagnetic

interference (EMI) and an overall improvement in performance.

It is important to design a layout that prevents noise from coupling

onto the input signal. Digital signals should not be run in parallel

with input signal traces and should be routed away from the input

circuitry. While the HMXADC9225 features separate analog and

driver ground pins, it should be treated as an analog component.

The AVSS and DRVSS pins must be joined together directly under

the HMXADC9225. A solid ground plane under the A/D is acceptable

if the power and ground return currents are carefully managed.

Alternatively, the ground plane under the A/D may contain serrations

to steer currents in predictable directions where cross coupling

between analog and digital would otherwise be unavoidable.

Analog and Digital Driver Supply Decoupling

The HMXADC9225 features separate analog and driver supply

and ground pins, helping to minimize digital corruption of sensitive

analog signals.

In general, AVDD, the analog supply, should be decoupled to AVSS,

the analog common, as close to the chip as physically possible.

It is recommended to use 0.1 uF ceramic chip and 10 uF tantalum

capacitors for the AVDD and DRVDD power inputs. A 0.1 uF ceramic

chip capacitor is adequate on the CML pin.

Quality and Radiation Hardness Assurance

Honeywell maintains a high level of product integrity through process

control, utilizing statistical process and six sigma controls. It is part of

a “Total Quality Assurance Program”, the computer based process

performance tracking system and a radiation hardness assurance

strategy.

Screening Levels

Honeywell offers several levels of device screening to meet your

needs. “Engineering Devices” are available with limited performance

and screening for prototype development and evaluation testing.

Hi-Rel Level B based and S based devices undergo additional

screening per the requirements of MIL-STD-883.

Reliability

Honeywell understands the stringent reliability requirements that

space and defense systems requires and has extensive experience

in reliability testing on programs of this nature. Reliability attributes

of the SOI process were characterized by testing specially designed

structures to evaluate failure mechanisms including hot carriers,

electro-migration, and time-dependent dielectric breakdown. The

results are fed back to improve the process to ensure the highest

reliability products.

In addition, our products are subjected to dynamic, accelerated life

tests. The packages used are qualiﬁed through MIL-STD-883,

TM 5005 Class S. The product screening ﬂow can be modiﬁed to

meet the customer’s speciﬁc requirements. Quality conformance

testing is performed as an option on all production lots to ensure

on-going reliability.

E2E1

NO.14 NO.15

NO.1 NO.28

(.300)

(0.55) .026 MIN

Honeywell Aerospace

12001 Highway 55

Plymouth, MN 55441

Tel: 800-323-8295

www.honeywell.com

N61-1063-000-000

December 2010

To learn more about Honeywell’s radiation hardened integrated circuit products and

technologies, visit www.honeywell.com/radhard.

Honeywell reserves the right to make changes to improve reliability, function or design.

Honeywell does not assume any liability arising out of the application or use of any product

or circuit described herein; neither does it convey any license under its patent rights nor

the rights of others.

Ordering Information

Process

M = Mixed Signal

X = SOI

Screen Level

Z = Class S\QML V Equivalent (1)

Y = Class B\QML Q Equivalent (2)

E = Eng. Model(3)

Source

H = Honeywell

Part Number

Package Destination

N = 28 Pin Flat Pack

Par t Type

NAND00

HMX ADC 9225 NZH

Total Dose Hardness

G = 5x105 rad (Si)

N = No Level

Guaranteed (3)

(1) These receive the Class V screening and QCI is included.

Customer must specify QCI requirements.

(2) These receive the Class V screening but do not have QCI included.

(3) Engineering Model Description: Parameters are tested -55°C to 125°C,

24 hour burn-in, no radiation guaranteed

Package Deﬁnition

Dimensions

Symbol (Inches) Min. Norm Max.

A .108 .120 .133

A1 .098 .107 .117

b .015 .017 .019

c .004 .005 .006

D1 .404 .410 .416

E1 .712 .720 .728

E2 .645 .650 .655

e .050 BSC

L1 1.150 BSC

N 28