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Analog Devices Inc. DAS1158
- Part No.:
- DAS1158
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-CDIP Module
- Datasheet:
-
DAS1158.pdf
- Description:
- DATA ACQUISITION SYSTEM ADC
- Quantity:
- Payment:
- Shipping:
Inventory:3,491
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Product details
Overview
DAS1158 from Analog Devices is a 15-bit sampling analog-to-digital converter with integrated sample/hold amplifier, precision reference, and tri-state parallel digital outputs. It delivers differential nonlinearity of ±0.0015% FSR max, integral nonlinearity of ±0.003% FSR max, and guaranteed no missing codes over –25°C to +85°C. Designed for portable instrumentation, it operates at ≤650 mW total power on ±15 V and +5 V supplies.
For engineers reviewing the DAS1158 datasheet, DAS1158 pinout, DAS1158 application, or DAS1158 equivalent, key selection criteria include its 15-bit resolution, ±0.0015% FSR differential linearity, 18 kHz minimum throughput, unipolar/bipolar input range configurability (0–5 V, 0–10 V, ±5 V, ±10 V), and offset binary/two's complement output coding - all in a 28-pin metal-can package.
Technical Context
The DAS1158 implements a successive-approximation ADC architecture with an on-chip unity-gain sample/hold amplifier optimized for high-impedance source interfacing. Its internal gain and offset potentiometers enable system-level trimming without external components.
It supports user-selectable analog input ranges via pin programming and provides byte-selectable tri-state outputs for direct 8-bit or 16-bit bus interfacing. Conversion timing is triggered on the falling edge of the TRIGGER signal, with a maximum conversion time of 50 μs and acquisition time of 250 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 15-bit - delivers 1 LSB = 305 µV full-scale step size in 0–10 V range. |
| Throughput Rate | 18 kHz min - enables real-time sampling of signals up to ~9 kHz Nyquist bandwidth. |
| Differential Nonlinearity | ±0.0015% FSR max - ensures monotonicity and <1 LSB error across full code range. |
| Integral Nonlinearity | ±0.003% FSR max - guarantees absolute accuracy within ±1 LSB over temperature. |
| Power Consumption | 650 mW max at ±15 V / +5 V - enables battery-powered portable instrumentation. |
| Operating Temperature | –25°C to +85°C rated performance - validated for industrial field equipment operation. |
| Analog Input Ranges | User-configurable: 0–5 V, 0–10 V, ±5 V, ±10 V - eliminates need for external scaling amplifiers. |
| Digital Output Format | Unipolar: true binary; Bipolar: offset binary or two's complement - simplifies microprocessor interface logic. |
Pinout & Package
Package: 28-pin metal-can (2.4" × 0.7" × 0.375"), hermetically sealed, MIL-STD-202E compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ANA IN 1 / ANA IN 2 / ANA IN 3 | Analog input selection terminals | Configure unipolar/bipolar range and polarity via jumper; e.g., ANA IN 1 + ANA IN 2 = 0–10 V unipolar. |
| S/H INPUT / S/H OUTPUT | Sample/hold amplifier I/O | Direct connection path for high-impedance signal conditioning; bypasses ADC input stage when used. |
| TRIGGER / S/H CONTROL | Conversion initiation and S/H mode control | Falling edge initiates hold + conversion; tied together for single-signal operation. |
| HIGH BYTE ENABLE / LOW BYTE ENABLE | Digital output byte gating | Enable 8-bit segments independently for 8-bit or 16-bit bus interfacing without external latches. |
| REF OUT | Internal reference voltage output | +5 V reference available for external circuitry calibration or DAC reference sharing. |
| GAIN ADJ / OFFSET ADJ | Trim potentiometer access | Two-pin access points for zero/gain calibration using external trimmers or automated test fixtures. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated sample/hold amplifier | Eliminates external S/H IC and reduces board space; 250 ns acquisition time supports high-speed sampling. |
| On-chip precision reference | +5 V reference with ±0.3% initial tolerance and low drift - removes need for external voltage reference IC. |
| Byte-selectable tri-state outputs | Enables direct connection to 8-bit or 16-bit microprocessor data buses without glue logic or bus transceivers. |
| User-programmable input ranges | Four standard ranges (0–5 V, 0–10 V, ±5 V, ±10 V) selected by pin strapping - avoids external gain-switching circuitry. |
| No missing codes guaranteed | Ensures monotonic response critical for closed-loop control and feedback systems without code gaps or ambiguities. |
Applications
| Seismic Data Acquisition | Portable Field Instrumentation |
|---|---|
|
Use Scenario: High-fidelity digitization of low-amplitude ground motion signals in remote seismic arrays. IC Role / Device Role / Timing Role: Primary ADC capturing 15-bit waveform samples at 18 kHz with minimal power draw per node. Use Value: ±0.0015% FSR differential linearity preserves small-signal integrity; 650 mW max power enables solar/battery operation for months. |
Use Scenario: Battery-powered handheld multimeter or environmental sensor logger operating in harsh outdoor conditions. IC Role / Device Role / Timing Role: Core analog front-end ADC handling multiple input ranges and delivering calibrated digital output to MCU. Use Value: Pin-strappable 0–10 V / ±5 V ranges eliminate range-switching relays; –25°C to +85°C rating ensures reliability in uncontrolled environments. |
| Automated Test Equipment | Medical Instrumentation |
|
Use Scenario: Modular ATE slot card acquiring sensor and stimulus signals during functional testing of PCB assemblies. IC Role / Device Role / Timing Role: Precision ADC subsystem providing traceable, repeatable measurements with programmable gain/offset calibration. Use Value: Internal GAIN ADJ and OFFSET ADJ pins allow factory and field calibration without redesign; no missing codes prevents measurement discontinuities. |
Use Scenario: Patient-monitoring device digitizing ECG, EEG, or blood gas analyzer outputs requiring clinical-grade accuracy. IC Role / Device Role / Timing Role: High-stability ADC converting low-noise analog biosignals with guaranteed monotonicity and low T.C. drift. Use Value: ±8 ppm/°C differential nonlinearity T.C. and ±80 µV/°C zero T.C. maintain calibration integrity across patient temperature variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 15-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7874 (Analog Devices) | 14-bit resolution, 100 kSPS, ±12 V supply only, no internal reference | Lacks internal reference and S/H; requires external op-amps and reference for same functionality | Choose if higher speed (100 kSPS) is prioritized over resolution and integration level. |
| MAX1166 (Maxim Integrated) | 16-bit resolution, 100 kSPS, +5 V only, internal reference, SPI interface | Serial interface replaces parallel bus; lower power (35 mW) but lacks S/H and wide temp range | Choose for compact, low-power designs where microcontroller SPI is preferred over parallel bus. |
Compared with AD7874 and MAX1166, the DAS1158 uniquely combines 15-bit accuracy, integrated S/H and reference, wide input range flexibility, and industrial temperature support - making it optimal for portable, self-contained data acquisition where board space, calibration simplicity, and environmental robustness are critical.
Availability
DAS1158 is available at Aetrix Electronics and suitable for seismic monitoring systems, portable field instrumentation, automated test equipment, medical diagnostic devices, and process control data acquisition requiring stable component supply and long-term obsolescence management.
Supply support for DAS1158 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The DAS1158 belongs to Analog Devices' legacy high-accuracy sampling ADC family designed specifically for portable, low-power, wide-temperature industrial and scientific instrumentation where integration, stability, and ease of calibration are essential.
FAQ
What is the resolution and effective number of bits (ENOB) of the DAS1158?
The DAS1158 is specified as a 15-bit ADC with guaranteed no missing codes and ±0.0015% FSR differential nonlinearity. While ENOB is not explicitly published in the datasheet, its 18 kHz throughput, ±0.003% FSR integral nonlinearity, and low noise floor support >14.5 effective bits in DC and low-frequency applications. The DAS1158 achieves this performance without external components due to its integrated sample/hold and reference.
Does the DAS1158 require external decoupling capacitors on its power supplies?
No, the DAS1158 does not require external decoupling capacitors. It integrates high-quality tantalum capacitors internally on both ±15 V and +5 V supply inputs to ground, as confirmed in the "Power Supply and Grounding Connections" section of the datasheet. This eliminates the need for external bulk or bypass caps, simplifying layout and reducing bill-of-materials count for the DAS1158 design.
How is bipolar versus unipolar operation configured on the DAS1158?
Bipolar versus unipolar operation on the DAS1158 is configured via analog input pin strapping (ANA IN 1, ANA IN 2, ANA IN 3), as defined in Table I of the datasheet. For example, connecting ANA IN 1 and ANA IN 2 to +10 V selects the 0–10 V unipolar range, while connecting ANA IN 1 to +5 V and ANA IN 2 to –5 V selects the ±5 V bipolar range. No register writes or digital commands are needed - configuration is purely hardware-based.
What output coding formats does the DAS1158 support, and how are they selected?
The DAS1158 supports true binary for unipolar mode and either offset binary or two's complement for bipolar mode - selected automatically based on input range configuration. There is no software or pin control to switch coding format; it is determined by the analog input wiring. For instance, ±5 V input yields offset binary output, while ±10 V input yields two's complement output. The DAS1158 datasheet confirms this behavior in the "Input/Output Relationships" section.
Is the DAS1158 still in active production, and what is its obsolescence status?
The DAS1158 is marked "OBSOLETE" in the provided datasheet pages, indicating it has been discontinued by Analog Devices. However, Aetrix Electronics maintains legacy inventory and offers extended lifecycle support, including traceable sourcing, cross-reference assistance, and last-time-buy coordination for customers continuing to rely on the DAS1158 in deployed systems or long-lifecycle industrial equipment.
DAS1158 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- DAS1158
- Package/Case:
- 32-CDIP Module
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 15
- Sampling Rate (Per Second):
- 18k
- Number of Inputs:
- 3
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V, ±12V ~ 17V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V, ±12V ~ 17V
- Features:
- -
- Operating Temperature:
- -25°C ~ 85°C
- Supplier Device Package:
- 32-CDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
DAS1158 FAQ
1.How can I place an order for DAS1158 through Aetrix?
Please submit a Request for Quotation (RFQ) for DAS1158 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DAS1158 reliable?
The price and inventory of DAS1158 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DAS1158 is usually 5 days.
3.What payment methods are accepted for DAS1158?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DAS1158 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DAS1158?
DAS1158 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DAS1158 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DAS1158?
For technical support, including DAS1158 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DAS1158 requirements.
6.How does Aetrix verify that DAS1158 is sourced from the original manufacturer or authorized distributors?
All DAS1158 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DAS1158 meets industry standards.
7.What is the process for return or replacement of DAS1158?
All DAS1158 units undergo pre-shipment inspection (PSI). If there is an issue with DAS1158, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DAS1158 part is unused and in its original packaging.
Return procedure for DAS1158:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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